METHOD OF MANUFACTURING A GLASSES LENS AND GLASSES LENS

专利摘要:
method of manufacturing an eyeglass lens and eyeglass lens. The present invention is directed to a method of manufacturing an eyewear lens (10) comprising steps of providing an integral prime lens (12), wherein the integral prime lens (12) has a front surface (14) and a back surface ( 16), and wherein the integral principal lens (12) is at least one selected from a group consisting of a spherical energy lens, an astigmatic energy lens, and a lens having a principal curvature (18) of the anterior surface ( 14) at a first meridian and a principal curvature (20) of the back surface (16) at the first meridian which are different from each other so as to provide non-zero spherical energy; and applying at least one additional lens element (22) to at least a portion of the front surface (14) and/or at least a portion of the rear surface (16), wherein the at least one additional lens element (22) is made up of at least one layer (26-33) having a plurality of layer elements (35-37), in particular printed elements. additionally, the present invention is directed to a corresponding eyeglass lens.
公开号:BR102014029894B1
申请号:R102014029894-0
申请日:2014-11-28
公开日:2021-09-21
发明作者:Ralf Meschenmoser；Timo Kratzer；Paraic Begley；Stephen Brown
申请人:Carl Zeiss Vision International Gmbh；Carl Zeiss Vision Ireland Ltd.；
IPC主号:

专利说明:

[001] The present invention relates to a method of manufacturing a lens for spectacles and a lens for spectacles.
[002] It is well known in the art that spectacle lenses can be used to correct visual problems. Ideally, an eyeglass lens is not only manufactured to suit the individual needs of an eyewear wearer in the best possible way, but also at minimal cost. Spectacle lenses are described by their posterior surface and anterior surface shapes. Typically, a wearer's visual problems are described by a so-called prescription that provides parameters for spherical energy, astigmatic energy, and prismatic energy to correct aberrations in the wearer's eye.
[003] Different manufacturing processes for such spectacle lenses are known. For example, casting or molding processes are known and generally considered to be the most economical manufacturing processes. In a typical molding process, two mold halves are placed adjacently to create a cavity having a desired geometry for the eyeglass lens. Within the cavity thus formed, a polymerizable material, a heat-setting material or a thermoplastic material can be inserted to form the spectacle lens. Additionally, a granular or pellet material can be heated and processed through die casting or injection molding. In particular, such molding processes are advantageous in the event that no additional surface processing steps are required later, for example for polishing or grinding purposes.
[004] Additionally, typical surface machining methods are known and start with lens molds that do not have a desired geometric shape on their anterior or posterior surfaces. Alternatively, starting with so-called semi-finished lens molds is also known where neither the front surface nor the back surface has a desired geometric shape yet and only the other unfinished surface must be ground and polished as necessary. During coating, ie grinding and polishing, not only rotationally symmetrical shapes but also asymmetrical and free-form surfaces can be formed. Thus, such processes are normally used when it is necessary to manufacture spectacle lenses for an individual wearer taking into account their individual parameters and the desired use of the spectacle lens. As such, progressive lenses are typically manufactured in this way.
[005] However, these processes also have certain disadvantages. For example, in particular, when using semi-finished lens molds, the manufacturer always needs to stock a multiplicity of prototype lens molds distinct in spherical energy, astigmatic energy and prismatic energy and/or addition, where "addition" means the difference between a spherical energy in the far and near part of a progressive lens.
[006] Additionally, such manufacturing processes typically require a relatively long period of time as adequate manufacturing facilities are not present in every optician or eye care provider's office. As such, eyeglass lenses are typically ordered directly from the manufacturer's tip or from a large-scale production facility. Eyeglass lens manufacturing facilities that produce the eyeglass lenses geometrically shaped as desired and distribute them to the eye care provider in a standard circular or elliptical shape. So, in opticians or in the office, this spectacle lens merely needs to be adapted and fit into a specific frame.
[007] Therefore, in the technique, there has always been a tendency to seek new methods of manufacturing spectacle lenses.
[008] For example, document US 2011/0298877 A1 illustrates a printhead for printing optical structures to a substrate comprising an injection device for ejecting at least one drop of a printing ink towards the substrate and a curing device to cure at least one deposited drop, where the curing device comprises at least one UV-LED (Ultraviolet Light Emitting Diode).
[009] Additionally, the document EP 2 412 767 A1 illustrates a printing ink, a use of the printing ink, an article and a method of manufacturing an article. The document refers to a printing ink for printing optical structures on a substrate by means of an inkjet printer, where the printing ink is at least partially transparent to optical light in a range between 380 and 780 nm, where the printing ink comprises a dynamic viscosity between 500 and 100 mPa/sec, substantially at 25°C and where the printing ink comprises a surface tension of at least 30 mN/m, substantially at 25°C.
[0010] Additionally, for example, document US 2009/0250828 A1 illustrates a method of manufacturing an ophthalmic lens comprising introducing a volume of photocurable lens material into a container, wherein said container comprises a mold surface. The method further comprises creating a digital 3D mathematical model defining the corrective needs of an eye and projecting UV light program patterns through said mold through a pattern generator, or in said UV light program patterns to cure the material. of a photocurable lens in a lens shape defined by said mold surface and said digital model.
[0011] Additionally, document US 2012/0019936 A1 illustrates a device for directing light beams comprising a translucent substrate and a light directing structure on at least a part of the substrate, where the light directing structure comprises a material substantially which is arranged in a pattern on the substrate such that the light directing structure comprises at least one optical prism. Additionally, for example, document DE 10 2006 003 310 A1 illustrates a method of manufacturing a lenticular image and a method of producing Braille or engraved printing. The method includes generating lenses by applying material in layers or by generating lenses through a multiplicity of subsequently applied layers or parts of material.
[0012] Additionally, document DE 10 2009 004 377 A1 illustrates a method of manufacturing an spectacle lens, a computer program product and the use of the spectacle lens manufacturing device. In particular, the method comprises the steps of providing a material processing device, providing embedded data from the spectacle lens in the manufacture of the spectacle lens, in accordance with the embedded data provided by positioning towards the unit of the at least one material through the material processing device.
[0013] DE 10 2009 004 380 A1 illustrates a similar approach for manufacturing an individual spectacle frame. Additionally, DE 10 2009 004 379 A1 illustrates a similar method for manufacturing an spectacle lens mold accessory.
[0014] Finally, the document WO 2013/149892 A1 illustrates an invention related to a device for producing personalized eyeglasses comprising a scanning unit and a production unit, where the scanning unit is configured to scan at least a part of the face of the customer and where the production unit comprises at least one printing device for printing an spectacle lens and/or an spectacle frame, where the printing device is configured to print the spectacle lens and/or the spectacle frame depending on the scan data of the scan unit.
[0015] However, all of these methods provided still consume a significant amount of time as spectacle lenses are produced completely through a three-dimensional printing process. Additionally, currently, raw material costs for three-dimensional printing processes add up to 800 times the costs of conventional manufacturing techniques. Depending on the resolution of such printing processes, the time to produce two spectacle lenses for an individual user and the costs involved still hinder the application of such methods to the market.
[0016] Therefore, it is an object of the present invention to provide a method for manufacturing an spectacle lens and an spectacle lens that significantly speeds up the process of manufacturing spectacle lenses for individual users while still remaining economical.
[0017] Therefore, according to a first aspect of the present invention there is provided a method of manufacturing an eyeglass lens, a method being characterized by the steps of providing an integral main lens, where the integral main lens has an anterior surface and a posterior surface, and where the integral main lens has an anterior surface and a posterior surface, and where the integral main lens is at least one selected from a group consisting of a spherical energy lens, an astigmatic energy lens, and a lens having a principal curvature of the anterior surface on a first meridian and a principal curvature of the posterior surface on the first meridian which are different from each other so as to provide, in particular, a single spherical energy other than zero, and to apply at least one element of lens additional to at least a part of the front surface and/or at least a part of the back surface, in particular the only a part of the front surface and/or only a part of the back surface, wherein the at least one additional lens element is constituted by at least one layer having a plurality of layer elements, in particular printed layer elements.
[0018] Thus, the present invention has the basic idea of not trying to produce an eyeglass lens completely directly or completely through an addition process such as 3D printing. Such three-dimensional printing methods are widely known in the art. However, even at current resolutions, such printing methods are time-consuming and result in lenses where the staggered-like arrangement of the edges of different printed layers is potentially recognizable and considered cumbersome by an eyewear wearer.
[0019] Therefore, the present invention uses a completely different approach. In general, spectacle molds comprising standard prescriptions of wide use can already be manufactured in large numbers with minimal costs. In particular, so-called FSV (Finished Single Vision) lenses that fit various prescriptions, for example prescriptions comprising a spherical energy, can be manufactured at minimal cost. Starting with such fully finished spherical energy lens or astigmatic energy lens lens molds, adding an additional lens element through 3D printing requires only a minimal amount of material to be applied to one or both of these mold surfaces. lens to adapt optical energies to individual needs, in particular to add a new part to provide an individually tailored progressive lens.
[0020] According to a second additional aspect of the present invention, there is provided an spectacle lens comprising an integral main lens, where the integral main lens has a front surface and a posterior surface and where the integral main lens is at least one selected. from a group consisting of a spherical energy lens, an astigmatic energy lens and a lens having an anterior surface principal curvature on a first meridian and a posterior surface principal curvature on the first meridian that are different from each other from so as to provide, in particular, a single non-zero spherical energy, and characterized in that at least one additional lens element applied, in particular adhered via an adhesive, to at least a part of the front surface and/or at least a part of the posterior surface, in particular only a part of the anterior surface and/or only a part of the post surface. further, where at least one lens element is made up of at least one layer having a plurality of layer elements, in particular, printed layer elements.
[0021] Thus, this aspect of the invention describes an spectacle lens manufactured in accordance with the method according to the first aspect.
[0022] Unless otherwise indicated, the terminology used in the context of this application corresponds to the definitions in the standard DIN EN ISO 13666; 1998-11 of DIN Deutschen Institut für Normung e.V.
[0023] The term "integral" is used in the context of the current order meaning that the integral main lens is a one-piece part. In particular, the integral main lens was manufactured according to methods known in the art or, for example, casting or injection molding a lens mold and finishing the surfaces by grinding and polishing as required.
[0024] The term "main lens" used in the present context means the basic lens on which additional material is supplied through an addition process. It can also be called "basic lens". According to the invention, the main lens can already be a spherical energy lens or an astigmatic energy lens.
[0025] The term "additional lens element" in the present context means an element additionally applied to one or both surfaces of the main lens through an addition process. The additional lens element itself does not necessarily need to have optical energy. It may also take the form of a layer of a coating to cover one or both surfaces of the main lens.
[0026] The term "main curvature" of the anterior surface or posterior surface, in the current context, describes the unique essential curvature or nominal curvature of the anterior surface or posterior surface to provide a spherical energy, in particular, a prescribed spherical energy, in a determined plan. Thus, the "main curvature" can also be referred to as "nominal curvature". However, as presented in more detail below, the front surface and/or the rear surface may comprise at least one recess and/or at least one flat section, in particular to which the additional element is applied. These recesses and/or flat sections do not form part of the "main curvature". In case the spectacle lens comprises an optical geometric axis, as per section 4.8 of DIN EN ISO 13666, the "main curvature" is on an spectacle lens meridian. A "meridian" is each plane that contains the optical geometric axis, as per section 5.7.2 of DIN EN ISO 13666. In this case, the essential curvature in a meridian is the "principal curvature". In case the spectacle lens does not comprise an optical geometric axis, the "main curvature" can also be defined as being within a plane of the spectacle lens that contains a centerline which, in turn, runs through the geometric centre, according to section 5.5 of DIN EN ISO 13666, for the anterior surface and the posterior surface.
[0027] The term "near part" according to section 14.1.3 of the DIN EN ISO 13666 standard defines that part of a progressive or multifocal energy lens having the dioptric energy for near vision. It can also be called the reading part. Similarly, the term "far part" or "far part" according to section 14.1.1 of the DIN EN ISO 13666 standard defines that part of a progressive or multifocal energy lens having dioptric energy for distance vision.
[0028] A "multifocal lens" in accordance with 8.3.2. of DIN EN ISO 13666 standard defines the lens design to provide two or more visibly divided parts of different focal energies. Additionally, the term "progressive lens" or "progressive energy lens" in accordance with section 8.3.5 defines a lens for such a surface that is not rotationally symmetric with continuous change in focal energy across a part or all of the lens. Therefore, the present invention can be particularly used to provide multifocal or progressive energy lenses, depending on whether different parts of the resulting lens can be visibly divided into certain parts having different focal energies or whether there is a continuous progression of focal energy.
[0029] A "layer element" is a unit of material. The material serves to form the at least one additional lens element. The material unit is applied via a corresponding unit applying device, in particular a three-dimensional printing device, stereo lithography device or laser sintering device. Thus, a "layer element" can be the minimum material dose applicable by the unit application device.
[0030] The term "printed layer elements" defines layer elements that have been printed with a three-dimensional printing device as presented in the prior art identified in the introductory part of the description. In particular, such printed layer elements can be provided by an inkjet printer applying a specific printing ink which can be UV-cured or thermally cured or otherwise cured to accumulate the additional element layer and each layer element. through the three-dimensional printing unit. Thus, a printed layer element would be a drop of material supplied through the three-dimensional printing device. However, there are also different possible methods for producing a multiplicity of layer elements, in particular stereo lithography or laser sintering. However, application of a three-dimensional printer using printing ink is preferred.
[0031] A "layer" comprises a multiplicity of layer elements. The layer elements of a layer are applied close to each other. The additional lens element comprises at least one layer. It may also comprise a multiplicity of layers so that the layers are applied one over the other to provide the additional lens element. For example, these layers can each be applied using commonly known three-dimensional printing techniques, unit by unit. For example, through a three-dimensional inkjet printer, droplets can be applied, where each droplet can form a single layer element or unit. Additionally, a three-dimensional printing device can apply a continuous row forming a single element or unit with adjacent rows and then forming a single layer. Then each continuous row of material can, for example, form a layer element. A layer can be oriented "flat" or two-dimensionally. Such an arrangement may be the result of a three-dimensional printing device moving the respective printhead merely two-dimensionally. However, it may be the case that a three-dimensional printing device could follow, for example, the curvature of a surface of the integral main lens. Then, each layer extends three-dimensionally and parallel to the surface to which it is applied, that is, the front surface or the back surface of the integral main lens, respectively.
[0032] The term "at least a part" in the context of the present application means that the additional lens element is provided on at least a part of the front surface or at least a part of the back surface. In this way, the anterior surface and/or the posterior surface can be covered by an additional lens element partially or completely. Additionally, it may be the case that more than one additional lens element is provided on the front surface and/or the rear surface so that, for example, two separate parts of the front surface can be covered by two additional lens elements and/or more than a part of the rear surface to be covered by the additional lens element.
[0033] Accordingly, an "eyeglass lens" refers to an ophthalmic lens that is worn in front of the eye, but not in contact with the eye, as per chapter 8.1.2 of the DIN EN ISO 13666 standard.
[0034] In the context of the present application, a finished spectacle lens according to No. 8.4.6 of the standard DIN EN ISO 13666 is an spectacle lens having two fully processed optical surfaces. It can be a spectacle lens before or after edge formation. At first, spectacle lenses are distributed as so-called uncut spectacle lenses, or finished spectacle lenses with rough edges, for example, from a large-scale laboratory for ophthalmologists. The uncut eyeglass lens in most cases has a circular or elliptical edge shape. However, free-form contour lines also occur. Uncut spectacle lenses are only adapted to a particular frame and set to the final size and shape by forming edges.
[0035] The terms "anterior surface" and "rear surface" in the context of the present application correspond to those in the standard DIN EN ISO 13666. According to No. 5.8 of the standard DIN EN ISO 13666, the term "anterior surface" shall mean the surface of the eyeglass lens that must face away from the eye on the eyeglasses. According to No. 5.9 of the standard DIN EN ISO 13666, the term "back surface" shall mean the surface of an spectacle lens that must face the eye in the spectacle. The terms of the order thus correspond to those of the DIN EN ISO 13666 standard. However, it goes without saying that - in the case of an spectacle lens being simply turned - the "front surface" in the context of the order would then be the surface rear surface in the sense of DIN EN ISO 13666 and the "back surface" in the context of the order would be the front surface in the sense of DIN EN ISO 13666 standard.
[0036] The term "prismatic energy" shall, according to No. 10.9 of the standard DIN EN ISO 13666, both the prismatic offset and the base configuration of the prismatic offset. According to No. 10.8, "prismatic shift" shall mean the change in the light ray direction as a result of refraction.
[0037] The term "dioptric energy" shall mean both the focal energy and the prismatic energy of an spectacle lens, as per No. 9.3 of the standard DIN EN ISO 13666.
[0038] The term "focal energy" describes both the spherical and astigmatic energy of an spectacle lens at a particular point, as per No. 9.2 in DIN EN ISO 13666. The terms "spherical energy" and "astigmatic energy" in this case apply refer to the definitions given in sections 11.2 and 12 in the DIN EN ISO 13666 standard.
[0039] In general, the phrase "non-zero" referring to a specific energy can be defined as giving the respective energy of a magnitude of at least 0.125, for example, a spherical energy of a magnitude of at least 0.25 diopter , that is, equal to or greater than +0.25 diopters and equal to or less than -0.25 diopters.
[0040] The term "spherical energy lens" refers to the definition according to section 11.1 of the DIN EN ISO 13666 standard, according to which a spherical energy lens is a lens that places the paraxial pencil or light beam parallel in a single focus. A spherical energy lens can have spherical surfaces or at least one spherical surface. The terms "prismatic energy lens" and "astigmatic energy lens" refer to sections 10.12 and 12.1, respectively, of the DIN EN ISO 13666 standard. Accordingly, an "astigmatic energy lens" is a lens that holds a paraxial pencil or parallel beam of light in two line focuses mutually separated at right angles and thus having a vertex energy in only the two main meridians. One of these energies can equal zero, with the corresponding line focus at infinity. Lenses referred to as cylindrical lenses, spherical lenses and tonic lenses are all astigmatic energy lenses.
[0041] Unless otherwise indicated, certain energies must be present at the drawing reference point, as per section 5.12 of the DIN EN ISO 13666 standard or, if present, at the distance drawing reference point, as per section 5.13 of the standard DIN EN ISO 13666.
[0042] The term "for a wearer" shall mean the effect of the spectacle lens to the wearer for whom the spectacle lens was designed. Such a "for one user" calculation is therefore performed on the basis of user data. In particular, this user data refers to an assumed rotation point position of the eye with respect to the spectacle lens. In particular, the position of the eye's pivot point is indicated as a distance from the posterior surface of the spectacle lens. In the case of a rotationally symmetrical spectacle lens, for example, the rotation point of the eye is at a specified distance from the posterior surface of the spectacle lens on its optical geometric axis.
[0043] "User data" comprises individual user data, eg recorded by an ophthalmologist to calculate a final eyeglass lens design. Such "user data" can comprise parameters like pupil distance, monocular pupil distance, corneal vertex distance, corneal vertex distance according to reference point requirement and/or according to rotation point requirement eye, monocular centering distance, centering point coordinates, lens distance or boxed lens distance, centering point offset, lens height and width or boxed lens height and width, lens center distance or center distance of boxed lens, glasses lens pantoscopic angle, bow angle and grinding height. The dimensioning of the boxing system is understood in the sense of the present invention as the measurement system as described in the relevant standards, for example in DIN EN ISO 13666. The pupil distance essentially corresponds to the distance of the pupil centers.
[0044] Therefore, the user data comprises especially preferred physiological and anatomical parameters of an spectacle wearer, specific frame properties, and characteristics of an spectacle wearer's eye system. The spectacle eye characteristics of the user's system can be used to calculate spectacle lenses and for precise centering of spectacle lenses, for example.
[0045] In general, in order to determine an eyeglass prescription for individual aids, an ophthalmologist determines several parameters. In the case of spectacle lenses, for example, the most relevant are: refraction values according to the prescription, usually provided in the form of sphere, cylinder and geometric axis; and general fitting parameters such as pupil distance, fitting height, pantoscopic angle and others; and adding near vision, near reference point and distant reference point energies, progression length, for example in the case of progressive lenses.
[0046] According to a third aspect, the present invention comprises a method of manufacturing an spectacle lens, in particular a multifocal lens or a progressive energy lens, the method comprising the steps of providing a measurement indicative of the properties of refraction of the eye; determining a prescription for glasses, in particular to correct eye aberrations; providing an integral main lens, where the integral main lens has an anterior surface and a posterior surface, and where the integral main lens is at least one selected from a group consisting of a spherical energy lens, an astigmatic energy lens and a lens having a principal curvature of the anterior surface on a first meridian and a principal curvature of the posterior surface on the first meridian which are different from each other so as to provide a particularly singular non-zero spherical energy, and application of at least one element of additional lens to at least a portion of the front surface and/or at least a portion of the rear surface, wherein the at least one additional lens element is comprised of at least one layer having a plurality of layer elements. In particular, the integral main lens is provided corresponding to the given spectacle prescription. In particular, the spherical energy that is nonzero corresponds to the prescription. This aspect may further comprise determining an spectacle add energy in a proximal portion of the spectacle lens and determining a shape of at least one additional element to provide the add energy. Alternatively, that aspect may further comprise determining a design of a proximal part of the spectacle lens based on individual wearer data and a corresponding shape of at least one additional element. In both alternatives, the at least one additional element can then be applied corresponding to the given format.
[0047] In particular, the step of determining an eyeglass prescription may comprise establishing an optimization space corresponding to a plurality of possible eyeglass prescriptions for the eye; determining a merit function, where a merit function value corresponds to a visual function of the eye when corrected using one of the plurality of possible spectacle prescriptions within the optimization space, determining the spectacle prescription by optimizing the value of the spectacle function. merit.
[0048] According to a fourth additional aspect, an apparatus for carrying out the method according to the third aspect may be provided.
[0049] Refractive errors or imaging errors of the human eye can be mathematically described by means of the so-called Zernike polynomials, for example. Errors of the eye close to a point of development of the polynomial series, eg the pupil center, with respect to the sphere, cylinder and geometric axis can be described eg using second order Zernike polynomials as a good approximation. However, in case a larger area around the point of development is described, for example, a wavefront through a fully open pupil aperture, a second order approximation may no longer be sufficient. In such cases, errors far from the point of development or pupil center can be better approximated by taking into account Zernike polynomials of even higher order.
[0050] In general, in order to determine a prescription for eyeglasses for visual aid, an ophthalmologist determines several parameters. In the case of spectacle lenses, for example, the most relevant are: refraction values, normally determined in the form of sphere, cylinder and geometric axis; snapping parameters such as pupil distance, snapping height, pantoscopic angle and others; and adding near vision, for example, in the case of progressive lenses.
[0051] In a further refinement, the one or more parameters characterizing the prescription of glasses, comprise one or more parameters selected from the group consisting of sphere, cylinder, geometric axis, M, J0 and J45. In particular, the parameters can be sphere, cylinder and geometry axis or they can be M, J0 and J45.
[0052] Obviously, additional parameters may be possible, for example second-order Zernike polynomials. For example, establishing the optimization space may include defining ranges for one or more parameters characterizing the prescription.
[0053] The optimization space can be a single space, such as, for example, a space having three or more dimensions. The three or more dimensions can include sphere, cylinder and geometry axis or M, J0, J45. In some embodiments, the optimization space comprises two or more subspaces. One of the subspaces can include a dimension for the sphere. Another of the subspaces may include a cylinder dimension and an axis dimension. In certain embodiments, one of the subspaces may include a dimension for M and another of the subspaces includes a dimension for JO and a dimension for J45.
[0054] Whether the parameters can be determined as sphere, cylinder and geometric axis or M, J0, J45, or can be determined for second order Zernike coefficients, may depend on the visual function used to determine the merit function or any other preference. All parameters or combinations of parameters can be used equally. As those skilled in the art are already aware, a set of parameters comprising sphere, cylinder and geometric axis can be recalculated to provide a set of parameters comprising M, J0, J45 by the following equations:

[0055] where α designates the geometric axis, cyl the astigmatism energy in diopters and sph the spherical energy in diopters. Otherwise, the following equations can be used to determine the cylinder and geometry axis components from J0 and J45:

[0056] Additionally, with the following equations, the second order Zernike coefficients C02, C+22 and C-22 can be used as the parameter set. However, even these Zernike coefficients can be derived from a set of parameters M, J0 and J45 with the following equations, where rp is the radius of the pupil:

[0057] According to a further aspect, a method for manufacturing an spectacle lens can be provided, the method comprising the steps of providing an integral main lens, where the integral main lens has an anterior surface and a posterior surface, and where the integral main lens is a lens having a major anterior surface curvature on a first meridian and a posterior surface major curvature on the first meridian that are different from each other so as to provide a non-zero spherical energy where the main lens integral comprises at least one recess or flat section in the anterior surface and/or in the posterior surface; and applying at least one additional lens element to at least a portion of the front surface and/or at least a portion of the rear surface, wherein the at least one additional lens element comprises at least one layer having a plurality of elements. of printed layer, and where at least one additional lens element is applied to each recess or flat section.
[0058] According to a further aspect, an spectacle lens may be provided comprising an integral main lens, where the integral main lens has an anterior surface and a posterior surface, and where the integral main lens is a lens having a main curvature of the anterior surface on a first meridian and a major curvature of the posterior surface on the first meridian which are different from each other so as to provide a non-zero spherical energy, and characterized in that at least one additional lens element applied to at least a portion of the front surface and/or at least a portion of the rear surface, wherein at least one lens element is constituted by at least one layer having a plurality of printed layer elements, wherein the integral main lens comprises at least one recess or flat section on anterior surface and/or posterior surface, and where one of at least one element of additional lens is applied to each recess or flattened section.
[0059] In this way, the objective of the present invention is fully achieved.
[0060] In general, at least one additional lens element can be applied to only a portion of the anterior surface and/or posterior surface. Alternatively or cumulatively, at least one additional lens element can be applied to the complete anterior surface and/or complete posterior surface. For example, by applying the additional lens element to only a part of the front surface and/or the back surface, a close part can be provided. For example, by applying the additional lens element to the complete anterior surface and/or complete posterior surface, anti-reflection, tinting and/or polarization properties can be provided.
[0061] Additionally, in general, the integral main lens may be rotationally symmetric, in particular about an optical geometric axis thereof. Additionally, in general, the main curvature of the anterior surface and/or main curvature of the posterior surface may be spherical curvatures. Additionally, the anterior surface or posterior surface can be a spherical surface with at least one coating selected from the group consisting of hard coating, an anti-reflective coating and a top coating being applied to the anterior surface. The anti-reflective coating can be a single-layer or multi-layer coating. The top coat can be a hydrophobic, oleophobic and/or dust repellent coating. Thus, a fabrication can be started with a lens mold having the front surface or back surface already fully coated so that only a treatment of one of the respective front and back surfaces to which the additional lens element is applied is required.
[0062] According to a refinement of the method according to an aspect, the step of providing an integral main lens comprises a step of melt molding or injection molding the integral main lens. Alternatively or cumulatively, the step of providing an integral main lens may comprise a step of coating the front surface and/or posterior surface of the integral main lens, in particular where the coating step includes grinding and/or polishing.
[0063] Thus, a fast and efficient way of providing the integral main lens can be provided. As such, such an integral main lens can be supplied as fully finished single vision lenses. These lenses can be supplied in large numbers for different standard spherical energies, eg +/- 0.125, +/- 0.25, +/0.375, +/- 0.5, etc., in steps of +/- 0.125 diopters or 0.25 diopters.
[0064] In a further refinement, the step of providing the integral main lens comprises providing the integral main lens as a fully finished lens mold, where the anterior surface and the posterior surface are coated according to a prescription, in particular where the spherical energy is a magnitude of at least 0.125 diopters.
[0065] In a further refinement, the step of supplying the integral main lens comprises supplying the integral main lens formatted into its final shape. In particular, the final shape is non-circular and non-elliptical.
[0066] In a further refinement, the step of providing the integral main lens comprises providing the integral main lens along with a frame, where the integral main lens is already shaped to fit into the frame. Additionally, the integral main lens may be provided fitted to the frame and the method may comprise the additional step of removing the integral main lens from the frame before the integral main lens application step is conducted.
[0067] Thus, the advantage can be provided that no additional edge formation may be required in the sale of eyeglasses to the user or ophthalmologist.
Thus, no additional grinding and/or polishing of the integral main lens is required on the manufacturing side. The additional lens element can be applied to the integral main lens simply by adapting its optical energies to the individual needs of the individual spectacle wearer.
[0069] In a further refinement of the method, the step of applying at least one additional lens element comprises the supply of a multiplicity of layer elements through an addition process, in particular when the addition process is a process of three-dimensional printing.
[0070] Such three-dimensional printing processes are widely known in the art. In particular, a so-called "printing ink" is provided on a substrate and this printing ink is then cured, in particular by radiation, eg UV curing. Thus, each drop of such printing ink can form a unit or layer element allowing the three-dimensional printer to build one layer from a plurality of layer elements and the additional lens element from at least one layer.
[0071] According to a further refinement of the method, the step of applying at least one additional lens element comprises supplying at least one additional lens element directly onto at least a part of the printing surface and/or the hair. minus a portion of the back surface of the integral main lens.
[0072] In this way, it is possible to print directly on the integral main lens. In other words, the integral main lens being a spherical energy lens or astigmatic energy lens forms a substrate for an addition process by the additional lens element and thus building the same directly into the integral main lens.
[0073] In a further refinement of the method, the method further comprises the step of generating additional lens element separately from the integral main lens, and wherein the step of applying at least one additional lens element comprises adhering through an adhesive of at least one additional lens element on at least a portion of the front surface and/or at least a portion of the rear surface of the integral main lens.
[0074] According to a further refinement of the method, the integral main lens consists of at least one element selected from a group consisting of crown glass, flint glass, polymeric plastics, polycarbonate-based plastics, plastics to polyamide based, acrylate based plastics, polythiourethane based plastics, allyl diglycol carbonate (ADC) and any combination of these materials.
[0075] By these commonly known materials, suitable integral core lenses can be provided to which additional lens elements can properly adhere. In particular, suitable integral main lens materials are commercially available with examples given in the table below, with ne as the index of refraction and ve with the Abbe number of green mercury e-line (wavelength: 546.07 nm);
Table 1
[0076] However, the above materials are merely an exception to the possible materials. Other materials, for example those frequently used in the field of solar lenses, are not included.
[0077] Additionally, for the above materials like MR 10, Trivex or Tribrid can also be used. MR 7, MR 8, MR 10 and MR 174 are sold by Mitsui Chemicals, Tokyo, Japan. MR 7 is a polymerization of a polyisocyanate compound and a polythiol compound. MR 8 is a polymerization of a polyisocyanate compound and two polythiol compounds. CR 39 is a widely sold allyl diglycol carbonate monomer. Trivex and Tribrid are sold by PPG Industries, One PPG Place, Pittsburgh, PA 15272, USA.
[0078] According to a further refinement of a method, the additional lens element is made up of at least one element selected from a group consisting of a polypropylene-based polymer, a styrene butadiene acrylonitrile-based polymer (ABS), a polyethylene terephthalate glycol (PET-G) based polymer, a polycarbonate (PC) based polymer, a polymethyl methacrylate (PMMA) based polymer, and any combination of these materials.
[0079] Such materials provide not only good optical properties, but also facilitate application, for example, through a three-dimensional printing device. An additional suitable material may, for example, be purchased on the market under the VisiJet SL trademark from 3D Systems, 333 Three D Systems Circle Rock Hill, SC 29730, USA.
[0080] By selecting one or more of these materials for the additional lens element, suitable optical properties can be provided while allowing fast three-dimensional impression and good adhesion to the integral main lens. However, the provided examples of materials are not exclusive. Other materials, in particular plastics, having sufficient translucent properties are available and which can be used as the material or one of the materials of an additional lens element.
[0081] According to a further refinement, the adhesive is at least one selected from a group consisting of a light-initiated curing adhesive, for example, an epoxy-based adhesive or an acrylate-based adhesive, a cyanoacrylate-based adhesive and any combination of these materials.
[0082] Thus, quick attachment of an additional lens element to the integral main lens can be provided without impairing the visual qualities of the spectacle lens. Light-initiated curing adhesives such as epoxy based adhesives or acrylate based adhesives provide good adhesion and can compensate for stresses. Additionally, its healing can be initiated by UV light almost invisible to human eyes, and it may only last a few seconds. Cyanoacrylate based adhesives can be particularly useful for bonding plastic materials.
[0083] In a further refinement, the at least one additional lens element is provided to form a proximal part of the spectacle lens.
[0084] Thus, a progressive lens can be formed according to the method initially presented in a quick way with the close part adapted to the individual spectacle wearer. In particular, the proximate part extends through an "axial position angle" of less than 175°, preferably less than 90°. For the illustration and explanation of the "axial position angle", reference is made to Figure 3.
[0085] According to a further refinement, the step of applying at least one additional lens element comprises providing more than one additional lens element to form a multifocal spectacle lens.
[0086] In particular, at least one additional lens element can be applied to the anterior surface and at least one additional lens element can be applied to the posterior surface acting together to form a so-called magnifying glass.
[0087] Thus, also multifocal spectacle lenses can be provided quickly with the segment to be provided in the integral main lens individually adapted and located in the integral main lens according to individual needs.
[0088] According to a further refinement, the multiplicity of layer elements is formed from at least two different materials, where the at least two different materials have different refractive index and/or different Abbe number.
[0089] Thus, the refraction and color properties of the additional element can be designed individually. In particular, by mixing different materials of different refractive energies, desired refractive properties of the additional lens element can be provided, on the other hand allowing the surface to be more level or smooth and requiring less curvature. Thus, chromatic errors can be minimized.
[0090] The term "Abbe number" shall mean the Abbe number according to No. 4.7 of the standard DIN EN ISO 13666. This can, for example, be described by the expression

[0091] with ne as the index of refraction of the e-line of green mercury (wavelength: 546.07 nm), nF' the index of refraction of the F' line of blue cadmium (wavelength: 479.99 nm) and nc' is the index of refraction of the red cadmium line c' (wavelength: 643.85 nm).
[0092] According to a further refinement, the step of applying at least one additional lens element comprises applying at least the first additional lens element and at least one additional second lens element, where the first lens element The additional lens element is applied to a portion of the posterior surface or anterior surface, and where the second additional lens element completely covers a respective surface between the anterior surface and the posterior surface of the integral main lens and the first additional lens element.
[0093] Thus, for example, the additional lens element can provide a portion close to the spectacle lens to provide a progressive energy. Then, the second additional lens element can have hard coating properties to enclose the entire spectacle lens and prevent scratching the additional lens element. Additionally, providing a level surface across the second additional lens element can make cleaning of the spectacle lens easier since no edge formation in the staggering direction of the additional lens element is positioned outside.
[0094] Additionally, the step of applying at least one additional lens element may comprise applying at least a first additional lens element and a second additional lens element, wherein the first additional lens element completely covers a surface respective one of the anterior and posterior surfaces of the integral main lens, and where the second additional lens element is applied to the first additional lens element.
[0095] Thus, for example, the first additional lens element can completely cover the anterior or posterior surface of the integral main lens to form, for example, an anti-reflective coating or a primer coating to improve adhesion. Then, the second additional lens element can be applied to the first additional lens element.
[0096] Such application of the second additional lens element is still considered as "application" of the second additional lens element towards a respective surface of the integral main lens as it is still indirectly attached thereto and influences the respective optical energies of the lens with glasses.
[0097] In a further refinement of the spectacle lens, it may be provided that the integral main lens comprises at least one recess or flat section in the anterior surface and/or posterior surface, and where one of the at least one additional lens element is applied to each recess or flat section, in particular where each of the at least one additional lens element has a refractive index and/or an Abbe number that is different from that of the integral main lens.
[0098] That is, level and/or smooth surfaces of the spectacle lens can be provided while adapting the optical energies by choosing suitable materials. The term "flat section" should define a portion of surface that has no curvature and that is flat. Thus, a "flat section" is a surface area having a radius of curvature that is infinite.
[0099] Additionally, the refinements presented above for the methods also correspondingly apply to spectacle lenses according to the present invention.
[00100] It will be understood that the features of the invention mentioned above and those further to be explained below can be used not only in the respective combination indicated, but also in other combinations or independently, without leaving the scope of the present invention.
[00101] Illustrative modalities of the invention are explained in greater detail in the description below and are represented in the drawings, in which:
[00102] Figure 1 illustrates an embodiment of an eyeglass lens;
[00103] Figure 2a illustrates an enlarged detailed part of the spectacle lens of Figure 1,
[00104] Figure 2b illustrates an enlarged detailed part of a further example of the spectacle lens of Figure 1;
[00105] Figure 2c illustrates an enlarged detailed part of a further example of the spectacle lens of Figure 1;
[00106] Figure 2d illustrates a distribution of focal energies in diopters of a modality of an spectacle lens;
[00107] Figure 2e illustrates an astigmatic aberration distribution in diopters of the modality of an spectacle lens in Figure 2d;
[00108] Figure 2f illustrates examples of surface structures of an additional lens element;
[00109] Figure 3 illustrates a top view of the spectacle lens illustrated in Figures 1 and 2;
[00110] Figure 4 illustrates an embodiment of a method;
[00111] Figure 5 illustrates an additional embodiment of an spectacle lens 10;
[00112] Figure 6 illustrates another additional embodiment of an spectacle lens 10;
[00113] Figure 7 illustrates another modality of an eyeglass lens 10;
[00114] Figure 8 illustrates another modality of an spectacle lens 10;
[00115] Figure 9a illustrates another embodiment of an spectacle lens 10 having additional lens elements applied in recesses in the anterior and posterior surfaces;
[00116] Figure 9b illustrates another additional embodiment of an spectacle lens 10 having additional lens elements applied to the front and back surfaces to provide a magnifying glass;
[00117] Figure 10 illustrates a close-up and enlarged detailed part of another embodiment of an spectacle lens 10;
[00118] Figure 11 illustrates another embodiment of an eyeglass lens 10;
[00119] Figure 12 illustrates another modality of an eyeglass lens;
[00120] Figure 13 illustrates another embodiment of an eyeglass lens;
[00121] Figure 14a illustrates another embodiment of an integral main lens;
[00122] Figure 14b illustrates a cross-sectional view of the integral main lens having an additional lens element applied;
[00123] Figure 15a illustrates another embodiment of an integral main lens;
[00124] Figure 15b illustrates a cross-sectional view of the integral main lens having an additional lens element applied;
[00125] Figure 16 illustrates another modality of an eyeglass lens in a top view;
[00126] Figure 17a illustrates a top view of another embodiment of an spectacle lens, in particular providing a bifocal spectacle lens;
[00127] Figure 17b illustrates a top view of another embodiment of an spectacle lens, in particular providing a trifocal spectacle lens;
[00128] Figure 18a illustrates a top view of another modality of spectacle lens, in particular to provide a progressive energy;
[00129] Figure 18b illustrates a top view of an additional modality of the spectacle lens, in particular for providing progressive energy;
[00130] Figure 18c illustrates a cross-sectional view of the embodiment illustrated in Figure 18b;
[00131] Figure 19 illustrates another top view of another embodiment of an eyeglass lens 10;
[00132] Figure 20a illustrates another top view of another embodiment of an spectacle lens, in particular to provide a marking;
[00133] Figure 20b illustrates another top view of another embodiment of an spectacle lens, in particular to provide a code;
[00134] Figure 21 illustrates a modality of glasses;
[00135] Figure 22 illustrates another modality of an eyeglass lens;
[00136] Figure 23 illustrates another modality of glasses;
[00137] Figure 24 illustrates another modality of glasses;
[00138] Figure 25 illustrates another embodiment of a method;
[00139] Figure 26 illustrates a system for conducting a method; and
[00140] Figure 27 illustrates another system to conduct the method.
[00141] Figure 1 illustrates an eyeglass lens 10 in a first embodiment. The spectacle lens 10 comprises an integral main lens 12. The integral main lens 12 may have been cast with subsequent grinding and polishing. Alternatively, the integral main lens 12 can also be ground and polished from a raw block or supplied through injection molding. In particular, the integral main lens is made of plastic, in particular CR39 or MR7. In particular, the integral main lens 12 is a spherical energy lens or an astigmatic energy lens. This means that the integral main lens 12 has a spherical energy in at least one meridian focusing a collimated light beam on a single focus. Integral main lens 12 has a front surface 14 having a main curvature 18 and a back surface 16 having a main curvature 20.
[00142] In the example of Figure 1, the integral main lens 12 is rotationally symmetric and thus has an optical geometric axis through which the meridian planes run. Thus, the cross section as illustrated in Figure 1 is such a meridian plane. Thus, the principal curvature of 18 and the principal curvature of 20 meet in this meridian plane. The main curvature 18 of the front surface 14 and the main curvature 20 of the back surface 16 are different from each other. In this way, a single spherical energy of the integral main lens is achieved. In the example illustrated in Figure 1, the integral main lens 12 can be considered a fully finished single vision lens providing a spherical energy in order to fit the corresponding prescription of a wearer of this spectacle lens 10. In particular, the spherical energy must have a magnitude of at least 0.125 diopters.
[00143] An additional lens element 22 is applied to a portion 24 of the front surface 14. Thus, the additional lens element 22 merely covers a portion of the front surface 14 as will be illustrated in additional examples below. An additional lens element 22 may also cover the front surface 14 and/or the back surface 16 completely. In the example illustrated in Figure 1, the additional lens element 22 serves to provide a close portion. The specific design of the geometry illustrated in Figure 1 is illustrative in nature only. Thus, depending on whether the additional lens element 22 is visibly identifiable in the spectacle lens 10, such an arrangement can be used to provide a multifocal spectacle lens or a progressive energy spectacle lens.
[00144] In particular, the additional lens element 22 comprises at least one layer with each layer having a multiplicity of layer elements, in particular printed layer elements. This allows the application of the additional lens element 22 to the anterior surface via a three-dimensional printing device.
[00145] Figure 2a illustrates an approximation of the structure of the additional lens element 22 applied to the front surface 14 of the integral main lens 12.
[00146] The integral main lens 12 comprises merely a single piece. This means the unitary structure of a single material. On the contrary, the additional lens element 22, as it is particularly applied by means of a three-dimensional printing device, has a structure in the layer direction. In the embodiment illustrated in Figure 2, the additional lens element 22 comprises eight layers in total numbered 26 to 33. These layers can each be applied through commonly known three-dimensional printing techniques, element by element. For example, through a three-dimensional inkjet printer, droplets can be applied where each droplet can form a single layer element. As an example, at layer 26, such individual layer elements are identified by reference numerals 35, 36 and 37. Obviously, the arrangement illustrated in Figure 2 is merely of an illustrative nature. It may also be the case that in the plane illustrated in Figure 2, a three-dimensional printing device applies a continuous row forming a single element with adjacent rows in a plane perpendicular to Figure 2. Then, each continuous row of material can, for example, form a layer element 35.
[00147] In the example illustrated in Figure 2a, the layers are oriented in a "flat" way. Such an arrangement may be the result of a three-dimensional printing device moving the respective printhead merely two-dimensionally. However, it may also be the case that a three-dimensional printing device could follow, for example, the curvature of the front surface 14 so that each layer 26, 32 also follows the curvature of the front surface 14. An example of such an embodiment is provided. in Figure 2b. The same applies, of course, if an additional lens element 22 is applied to the back surface 16.
[00148] In particular, the additional lens element 22 is applied to a translucent material. Additionally, the additional lens element 22 may comprise layer elements 34 to 37 made of at least two different materials, as illustrated in the example of Figure 2c. Elements made of a first material are drawn in black and designated by reference numeral 38. Elements made of a second material are drawn in white and designated by reference numeral 39. Thus, the general refractive index and/or Abbe number of the element of additional lens 22 can be designed taking into account the refractive index and Abbe number of the integral main lens 12 so as to provide adequate optical energies while requiring less printed material for application of the additional lens element 22. In particular, an offset on the front surface 14 can be reduced. Additionally, by properly mixing at least two different materials for providing single layer elements, a gradient in refractive index can be applied to the additional lens element 22, in particular in a radial direction.
[00149] In this way, for example, a close part fitting with the individual needs of an eyewear wearer can be formed by the convenient use of a three-dimensional printing device without the need to transport to and from a large optics. Additionally, such glasses can be manufactured in a short time period of just a couple of hours. Depending on the "resolution" of the three-dimensional printing device, ie the size of the individual layer elements which influences a distance between the shaped edges of the adjacent layers, a sufficient optical quality can be achieved. The higher the resolution or the lower each individual layer element, the longer the three-dimensional printing process will take. However, by providing an integral main lens 12 merely the additional lens element 22 needs to be printed to suit the needs of an individual wearer of the spectacles. While printing an entire spectacle lens can consume an amount of time which makes the application of a three-dimensional printing process completely unacceptable, it is currently suggested that an spectacle lens can be supplied within hours with sufficient optical quality to allow delivery. of an individually fitted spectacle lens in an ophthalmologist's office or, in other words, on a side where the end user or spectacle wearer buys the spectacles.
[00150] Figures 2d and 3e illustrate total focal energy distributions and astigmatic aberration of an embodiment of an spectacle lens 10 in accordance with the present invention. The modality is a bifocal spectacle comprising an integral main lens 12 which is a single vision lens being rotationally symmetrical about its optical geometric axis. An additional lens element 22 is applied to the anterior surface of the integral main lens. The additional lens element is a printed element that can be printed through a three-dimensional printer device. The additional lens element must provide a close part providing a +1.0 dpt addition and having a close reference point 39.
[00151] Additionally, while the surfaces of the additional lens elements have been illustrated flush in the examples described, other surface shapes or cross sections such as continuous, wave, digital, i.e., rectangular, triangular or parabola-shaped surfaces, may be formed through the layer elements, as shown in Figure 2f. Thus, so-called Fresnel structures can be provided to provide desired optical properties with reduced thickness further increasing fabrication speed due to reduced material requirements.
[00152] Below, a table of sagittas illustrates the distances from a reference plane to the grid points of an equidistant grid. The center of the grid is on the optical geometric axis of the integral main lens having coordinates x = 0, and y = 0. The table illustrates the distances from the anterior surface 14 of a reference plane whose origin in the X-, Y- direction is the geometric center of the progressive lens. All dimensions in X, Y and Z (sagitta) are in millimeters. For those skilled in the art, the position of the reference plane in space results from the values specified for the forward tilt and lens-frame angle of the lens elements. The Z-direction points towards the eye in this case, that is, a positive sagitta value describes a surface point closer to the eye, or a negative sagitta value describes a surface point farther away from the eye.
[00153] The integral main lens has a diameter of 65.0 mm, an anterior surface curvature radius of 120 mm, a posterior surface curvature radius of 148.892 mm, a thickness (intermediate optical geometric axis) of 1.895 mm, and a refractive index ne of 1,600 and a spherical energy of 1 dpt. The additional lens element applied to the lower front surface of the integral main lens is toric having a front surface curvature of 103.038 mm in vertical cross-section (parallel to the y axis) and 98,553 in the horizontal cross-section (parallel to the x-axis). Additionally, the refractive index of the additional lens element is a refractive index ne of 1,500. The additional lens element starts 4 mm below the optical axis of the integral main lens, that is, at coordinates x = 0 and y = -4. The sagittata of the anterior surface of the spectacle lens 10 according to modality are as given in Table 2 below:


[00154] Table 2 (sagitta in mm)









[00155] As can be derived from the table, the additional lens element extends to the edge of the spectacle lens in the lower half (coordinates x=0, y=32). As the additional lens element is applied to the lower half of the front surface only (negative y-values), the isolated sagittas of the additional lens element can be found by subtracting the sagitta values of the lower half from the respective sagitta values of the upper half, for example, value for [x=0, y=+32] minus the value for [x=0, y=32].
[00156] As can be derived from Figure 2d and Figure 2e, the spectacle lens according to this modality has a focal energy of exactly 2.0 dpt at the near reference point at coordinates x=0 and y=-12. Thus, the addition is +1.0 dpt, as desired. The distribution of focal energies in diopters and of astigmatic aberration in diopters is illustrated in Figures 2d and 2e. Aberrations are provided for infinite object distance.
[00157] Figure 3 represents an eyeglass lens 10. The eyeglass lens 10 in Figure 3 is shaped, formed from an essentially circular eyeglass lens product or uncut eyeglass lens, so it may have an essentially rectangular shape with rounded edges.
[00158] The representation of Figure 3 serves to explain how the terms "axial position angle" or "axial position range" are to be interpreted in the context of the order. In a box frame of the spectacle lens 10 in Figure 3, a geometric center of the spectacle lens 10 can be found. The geometric center axis 40 then extends through the spectacle lens 10 through the geometric centers on the anterior and posterior surfaces. Possible transverse panels 42, 44 then contain this central geometric axis 42 whose transverse planes are the planes in which the main curvatures 18, 20 of the anterior and posterior surfaces 14, 16 meet. In the case of a rotatably symmetric spectacle lens, the geometry can be the optical geometry axis, creating the flat meridians 42, 44. However, in general, the optical geometry axis can be offset from the geometric center.
[00159] Starting with geometric center 40 as the origin, similarly to the so-called TABO scheme for determining the base position of a prismatic energy, a plurality of geometric axes 46 can then be defined and a corresponding axial position angle 48 can be specified. A so-called "axial position range" is then a range of axial position angles 48. An example of an axial position range 50 is denoted by an arrow and comprises an extension of about 170°. In this way, it is possible to describe an additional lens element extension 22 about the circumference of the spectacle lens. In particular, an additional lens element 22 can therefore extend across an axial position range of less than 175°, in particular less than 120°, in particular less than 90°.
[00160] Figure 4 illustrates an embodiment of a method 100. After method 100 has been started, a first step 102 of providing an integral main lens 12, wherein the integral main lens 12 has a front surface 14 and a surface posterior 18, and wherein the integral main lens 12 is a spherical energy lens or astigmatic energy lens and/or has a major curvature 18 of the anterior surface 14 and a major curvature 20 of the posterior surface 16 which are different from each other than mode a provides a single spherical energy other than 0.
[00161] In this way, an integral main lens, for example, as described with respect to Figures 1, 2 and 3 is provided.
[00162] The provision of the integral main lens can, for example, be conducted by placing the integral main lens 12 in a three-dimensional printing device. In particular, such a supply can also be driven automatically by choosing a suitable integral main lens 12 based on user data from a stock, distributing it to the three-dimensional printing device and placing it so as the element of additional lens 22 can be applied thereto. Obviously, the supply step can also be carried out by manual placement. Additionally, the step of providing the integral main lens comprises providing the integral main lens 12 along with a frame (not shown), where the integral main lens 12 is already shaped to fit the frame. Additionally, the integral main lens 12 may be provided fitted to the frame and method 100 may comprise the additional step of removing the integral main lens 12 from the frame before the step of applying 104 of the integral main lens 12 is conducted.
[00163] Subsequently, a step 104 of applying at least one additional lens element 22 to at least a part of the front surface and/or at least a part of the rear surface is conducted, where the at least one additional lens element is consisting of at least one layer having a plurality of layer elements, in particular where the layer elements are printed layer elements. Thus, preferably, the application step is conducted as a three-dimensional printing step.
[00164] Figure 5 illustrates another modality of an spectacle lens 10. Similar elements are designated by similar numerical references and will not be repeated again.
[00165] The embodiment shown in Figure 5 has an integral main lens 12 with an anterior surface 14 comprising a recess 52. In addition, the anterior surface 14 has a principal curvature in the transverse plane shown in Figure 5. The anterior surface sections having the main curvature are designated by reference numerals 54 and 54'. Therefore, the recess 52 and the surface in the recess 52 should not be considered as part of the main curvature. In general, a recessed part of the latent part does not have the main curvature. Furthermore, the main curvature in portions 54 and 54' is different from the main curvature 20 of the back surface 16. Since the main curvature 18 in the front surface parts 54 and 54' parts 54 and 54' and the main curvature 20 of the rear surface 16 are different a on the other hand, they provide a spherical energy other than 0. In particular, this spherical energy must correspond to that of a prescription of an spectacle wearer to which the spectacle lens 10 is to apply.
[00166] The additional lens element 22 is then applied to the recess 52. Thus, individually better adapted close parts can be provided on the part 24 of the front surface 14 of the integral main lens 12. Again, the additional lens element 22 may comprise layer elements 34 to 37 made of at least two different materials. In this way, the general refractive index and/or Abbe number of the additional lens element 22 can be designed taking into account the refractive index and Abbe number of the integral main lens 12 so as to provide adequate optical energies in a close part while less printed material is required for application to the additional lens element 22. In particular, a deviation on the front surface 14 can be reduced. Additionally, by properly mixing at least two different materials for providing single layer elements, a gradient in refractive index can be applied to the additional lens element 22, in particular in a radial direction.
[00167] In Figure 6 an additional embodiment of an spectacle lens 10 similar to that illustrated in Figure 5 is illustrated. Similar elements are designated by similar numerical references and therefore are not explained again.
[00168] In the embodiment illustrated in Figure 6, a surface 56 of the additional lens element 22 is flush with the front surface 14 of the integral main lens 12 and thus the main curvature 18 of the integral main lens 14 is equal to that of the surface 56. Thus, a progressive energy lens can be provided. In such embodiments, the material of the layer elements 35 to 37 of the additional lens element 22 need to be different in refractive index from the integral main lens 12 in order to provide sufficient focal energies, i.e., spherical and astigmatic energies, in part 4 of the additional lens element 22 applied to provide an individually tailored proximate portion of the spectacle lens 10.
[00169] Figures 7, 8, 9a and 9b illustrate additional embodiments of an spectacle lens 10. Similar elements are designed with similar numerical references and will not be explained further.
[00170] In the embodiment of Figure 7, two additional lens elements 22 and 22' are applied to the front surface 14 of the spectacle lens. In this way, the first additional lens element 22 covers a portion 24 of the front surface 14. A second additional lens element 22' covers an additional portion 24' of the front surface 14. Since the additional lens elements 22 and 22' are added to the integral main lens 12, the main curvature 18 of the front surface 14 extends over the entire front surface in the uncovered portion by additional lens elements 22 and 22' designated with reference numeral 54 and under additional lens elements 22 and 22 '. Thus, a so-called trifocal lens can be provided cost-effectively and quickly.
[00171] In the embodiment of Figure 8, again a trifocal lens is provided. In this embodiment, the two additional lens elements 22 and 22' are provided on the posterior surface 16. Therefore, no buckling occurs on the anterior surface 14.
[00172] The embodiment of Figure 9a again illustrates two additional lens elements 22 and 22'. Both additional elements 22 and 22' are provided in corresponding recesses 52 and 52' one of which is provided in front surface 14 and one of which is provided in rear surface 16. additional lenses 22 and 22', a surface 56 of the first additional lens element 22 and surface 56' of a second additional lens element 22' may be provided flush or smooth with the corresponding front surface 14 and rear surface 16 of the integral main lens. 12. This can help provide a progressive energy lens having a close portion with a better gradient in addition to extending over a larger viewing error.
[00173] The embodiment of Figure 9b illustrates an additional lens element 22 applied to the anterior surface 14 and an additional lens element 22' applied to the posterior surface. Both additional lens elements 22, 22' are applied to corresponding portions 24, 24' of the front and rear surfaces 14, 16 so as to provide a strong magnification in the area of the spectacle lens 10. increase can be formed.
[00174] Figures 10 to 13 illustrate different embodiments of an spectacle lens 10 having more than one additional lens element 22. However, in each embodiment of Figures 10 to 13, at least one of the additional lens elements is provided covering a complete surface which is the front surface 14 or the back surface 16 of the spectacle lens 10. As the elements are designated by similar numerical references they will not be explained again.
[00175] In Figure 10 an additional lens element 22 is provided over the complete surface of the integral main lens 12. This additional lens element 22' may comprise only one layer. Such an additional lens element provided over the entire surface of the integral main lens 12 may comprise properties similar to those of a coating layer well known in the art. For example, such additional lens 22' can be applied to a material to form a hard coating or primer coating to support adhesion of an additional lens element 22 then applied to the additional lens element 22'. Additionally, such additional lens element 22' applied over the complete surface can assume the properties that are normally applied through sheets. In particular, such additional lens element may have polarization properties, photochromic properties or provide certain colors. Additionally, interchangeable functions may be possible, i.e. properties of the additional lens element changing whether or not a current is applied to it. Obviously, additional lens elements covering the entire surfaces can be provided as illustrated below, not only on the front surface 14, but also on the back surface 16.
[00176] Figure 11 illustrates an additional embodiment of an spectacle lens 10. In that embodiment, an additional lens element applied towards layer 22 is applied to the integral main lens to provide a close portion. Then, an additional lens element 22' can in particular be printed, applied to the entire spectacle lens 10 covering the complete integral main lens 16 and its front and rear surfaces and the additional lens element 22 applied, for example, in the illustrative embodiment shown in Figure 11 to the front surface 14. In certain applications, also an edge 58 of the integral main lens may be covered. The additional lens element 22' in Figure 11 may be made of a resin determined to provide a suitable hard coating for the complete spectacle lens 10.
[00177] Additionally, a chemical polish can be applied to additional lens elements 22' to provide a suitable coating and suitable optical properties. In particular, the step-like edge structures of the layer elements can adversely affect the optical properties of the spectacle lens. However, these effects can be reduced through chemical polishing, etching, providing a finishing lacquer, and/or thermally smoothing the layer edges.
[00178] Figure 12 illustrates another embodiment of the spectacle lens 10. In this embodiment, two additional lens elements are applied to each of the front 14 and rear 16 surfaces. applied. Lens element 22 is applied directly to integral main lens 12. Additionally, additional lens element 22' is then applied to additional lens element 22. The same applies to back surface 16 and additional lens elements 22" and 22'" applied thereto.
[00179] Obviously, an even larger number of additional lens elements can be applied. Thus, for example, not only hard coatings or primer coating can be applied, but also stacks of layers providing, for example, anti-reflective properties.
[00180] In Figure 13, another example of an eyeglass lens 10 is illustrated. In this embodiment, two additional elements 22 and 22' are applied to the front surface 14. The additional lens element 22 serving as a primary coating and the additional lens element 22' having a variable thickness to provide an adequate progressive energy gradation.
[00181] In general, in all embodiments of the present invention, additional lens elements 22 can be applied directly to the integral main lens 12 which is directly on the anterior and/or posterior surface 14, 16 and/or stacked on top of each other.
[00182] Additionally, it may be possible to print one or more additional lens elements separate from the integral main lens 12 and adhere the additional lens element later via an adhesive. For example, a UV curable adhesive can be used. Such adhesives are not only easy to use, but they do not influence the optical properties of the integral main lens to a point significantly recognizable to an eyewear wearer.
[00183] Figures 14a, 14b, 15a and 15b illustrate embodiments of the integral main lens 12 having a flattened section 60. In the embodiment illustrated in Figure 14, the flattened section 60 is provided on the front surface 14a. In this way, only the remaining part of the non-flattened front surface 14 can comprise the main curvature 18, in particular a singular spherical main curvature 18. In the flat section 60, then an additional lens element 22 can be applied to form, for example, a next section, an example of what is provided in Figure 14b.
[00184] The same applies to the modality illustrated in Figure 15a. The flat section 60 here has a circular shape and is also formed on the front surface 14 of the integral main lens 12. Thus, outside the circular shape of the flat section 60, such front surface 14 can have its own curvature 18. Again, the element of additional lens 22 can be applied to the flat section 60, an example of what is provided in Figure 15b.
[00185] The provision of such flat sections 60 can help not only to design the complete spectacle lens 10, but also the application of the additional lens element 22, in particular through three-dimensional printing, as the additional lens element can accumulate on a flat surface.
[00186] Figures 16, 17a, 17b, 18a, 18b, 19, 20a and 20b illustrate different top views of an spectacle lens 10 illustrating the terms of schematic height lines 62, the formal surface error covered by an element of additional lens on a surface of an eyeglass lens 10. The current example should be the previous surface 14.
[00187] Thus, Figure 16, for example, illustrates a smooth design for a nearby part. In contrast, Figure 17a illustrates a bifocal embodiment with sharp cutting edges towards the front surface 14 towards the additional lens element 22. Figure 17b illustrates a corresponding trifocal embodiment comparable to that illustrated in Figure 7 and having two lens elements additional 22 and 22' applied to anterior surface 14. Figure 18a illustrates a suitable format provider gradient in optical energy towards the proximal part. Figure 18b illustrates a nearby part having a gradient in progressive energy and projected with a so-called plateau line 63 that leads radially outward. Figure 18c illustrates a cross-sectional view of the embodiment illustrated in Figure 18b. In particular, it is apparent that the additional lens element 22 need not terminate or have a height equal to zero above the front or back surface 14, 16 of the integral main lens. Instead, the additional lens element 22 may still have a determined height 59 and thus form part of the edge in addition to the edge 58 of the integral main lens. Figure 19 illustrates a classic additional lens element 22 of circular shape to provide a simple addition at a given error of the anterior surface 14.
[00188] Figure 20a illustrates another example of a purpose of an additional lens element 22. The additional lens element 22 can be added to the front surface 14 or back surface 16 and can be made up of a layer among a multitude of elements providing a digital label that identifies the manufacturer. Additionally, as illustrated in Figure 20b, a code, in particular a two-dimensional code, can also be applied through the additional lens element 22 to identify the individual spectacle lens 10. Of course, a marking may not only serve as a label, but also as a code, therefore, combining the modality illustrated in Figures 20a and 20b.
[00189] Figures 21 to 24 illustrate different applications of spectacle lenses according to the current context. In general, goggles according to the present invention can be particularly advantageous in applications such as ski goggles, diving goggles, helmet visors, gas masks, etc. In such applications, the provision of multifocal or progressive energy lenses has always been a challenging task that can be significantly facilitated through the proposed methods and spectacle lenses.
[00190] Figure 21 illustrates an eyewear 70 for sporting purposes. For example, a normal sports eyewear can be used having two integral main lenses 10 and 10'. For these sports glasses, new parts can be applied through the additional 22 and 22' lens elements to provide a new vision suitable even for people who vary sports glasses.
[00191] In Figure 22, an example of an eyeglass lens 10 having two new parts is illustrated. The front surface 14 of this spectacle lens 10 has two additional lens elements 22 and 22' applied thereto, so that additional lens elements are provided for two portions 24, 24' of the front surface. So in that way, in a central zone 64 light rays 65 can pass through the normal integral main lens 12. In peripheral vision errors, the corresponding light rays 66 can pass not only through the integral main lens 12, but also through of the respective additional lenses 22, 22' providing adequate near vision and only one face down, but also one face up. For example, such applications can be particularly useful for aircraft pilots who need to check instruments below and above.
[00192] In Figure 23, an additional example for an application on an eyeglass 70 is illustrated. For example, ski goggles having a single integral main lens 12 can be fitted with two additional lens elements 22, 22' on distinct parts of a front surface of that integral main lens 12. Thus, adequate close vision can be provided for people wearing only their ski goggles.
[00193] Similar advantages can apply to the modality illustrated in Figure 24 which illustrates a gas mask having two integral main lenses applied to it. On each integral main lens, a suitable additional lens element 22, 22' is provided for close vision suitable for a person wearing a gas mask. Thus, according to the modalities illustrated in Figures 23 and 24, using such goggles 70, there would no longer be any use for normal goggles under ski goggles or gas masks.
[00194] Figure 25 illustrates an additional embodiment of a 100' method. Similar numerical references have similar method steps. Method steps 102 and 104 have already been explained with reference to Figure 4. In general, for manufacturing an spectacle lens, in particular a multifocal lens or a progressive energy lens, such a method may comprise an initial step of supplying an indicative measurement of the refractive properties of the eye of a spectacle wearer. Then, in step 108, a prescription for spectacles, in particular for correcting corresponding eye vibrations can be determined. Based on this, in particular, this step of determining an eyeglass prescription may comprise the establishment of an optimization space corresponding to a plurality of possible eyeglasses prescriptions for the eye, determining a merit function where in a value of the function of merit corresponds to a visual function of the eye when corrected by using one of a plurality of possible spectacle prescriptions within the optimization space and determining the spectacle prescription by optimizing the value of the merit function. This entire procedure is commonly known to those skilled in the art.
[00195] Then, based on the determined spectacle prescription, a corresponding integral main lens can be chosen and provided. As already highlighted above, delivery can be carried out automatically or manually. For example, automatically, a suitable integral main lens mold can be chosen from a stack having normal prescription parameters, in particular normal magnitudes of spherical energy, eg -0.125, -0.5, - 0.75, etc. in 0.125 or 0.5 diopter steps. Then, after the provision of the integral main lens, the step 104 of applying at least one additional lens element can be conducted.
[00196] Subsequent to step 104, an additional step of smoothing the edges of the layers can be conducted. In particular, such a step can be carried out by chemical polishing, etching, providing a finish lacquer and/or thermal smoothing of the layer edges.
[00197] Figure 26 illustrates a schematic view of a system 110 to conduct such a method. Such a system may comprise a measuring unit, in particular a wavefront measuring unit 112 for determining and providing a measurement indicative of the refractive properties of the eye. An additional calculating unit 114 can then determine the prescription for that eye. Then, a selection unit 160 can provide a suitable integral main lens 12. Then, a three-dimensional printer unit 118 can provide the at least one additional lens element for that integral main lens.
[00198] Figure 27 illustrates an embodiment of a system 110. A processing unit 122 for determining an eyeglass prescription for an eye comprises a processing unit 122 configured to receive information about a measurement indicative of the refractive properties of the eye, to establish an optimization space corresponding to a plurality of eyeglasses prescriptions for the eye, to determine a merit function, where a value of the merit function corresponds to a visual function of the eye when corrected using one of a plurality of possible prescriptions of glasses within the optimization space, where the merit function comprises a term depending on a magnitude of corrective astigmatism of the possible prescription of glasses and causing a less than ideal value of the merit function to be greater than the magnitude of the astigmatism corrective, and to determine the prescription of glasses by optimizing the value of the merit function. The optical wavefront aberration of a patient's eye from the wavefront aberration can be determined using an aberration meter 112. Additionally, a subjective refraction can also be determined. The calculation of the spectacle prescription is then conducted in the processing unit 122. The processing unit 122 may comprise a computer program product 123 which stores an executable program code for performing the methods discussed above. Then, the system 110 may further comprise an output device 132 which may be a monitor, a printer or a storage device for sending the determined eyeglass prescription to the output device 132. The measuring unit 112 is connected to the measuring unit. processing 122 via a line 150. The processing unit 122 is connected to the output device 132 via a line 152. Both lines 150 and 152 can each be a wired connection or a wireless connection for the transfer of data between the processing unit 122 to and from the aberration meter 112 and the output device 132.
[00199] Thus, system 110 can automatically determine an eyeglass prescription based on data provided through an aberration meter. However, instead of an aberration meter 112, the data underlying the optimization process can also be acquired via line 150 from a storage device that stores a multitude of previously acquired patient data.
[00200] The aberration meter 112 may be located at a first location 140. The processing unit 122 is located at a second location 142. The output device 16 may be located at a third location or may also be located at the first location 140. Additionally, an spectacle lens manufacturing unit 10, in particular a three-dimensional printer unit, may be present at the third location 144 or first location 140. The selection unit 116 may also be present at the third location 144. The unit selector 116 may comprise a stack of integral main lenses 116. Of course, all components 112, 132, 122, 118, 116, 124 and 166 may also be present at a singular location.
[00201] The first location 140, the second location 142 and the third location 144 may be remote from each other. The first location 140 is connected to the second location 142 via a data network 150, 152. The second location 142 and the third location 144 are connected via a data network 154. Thus, it may be possible for the refraction data to be provided. via the aberration meter 112 can be sent to the processing unit 122. Additionally, for example, the determined spectacle prescription can then be sent back to the first location, for example an optician, to be recognized by an ophthalmologist and provided for, for example, the prospect user. Additionally, the determined spectacle prescription can also be sent to a remote manufacturing unit to manufacture the respective visual aid.
[00202] The manufacturing unit can also be located at the first location 26; or - the first and third places can be the same. In that case, the aberration meter data is transmitted via connection 150 to the processing unit 122 at the second location 142 and then the calculated spectacle prescription is transferred back to the first location 140 and its possible manufacturing unit 118. Alternatively, from the second location 142, the determined spectacle prescription can be transferred to a third location 144 with a possible manufacturing unit 118 to manufacture the visual aid. Finally, it is possible that from this third location 144, the fabricated visual aid is then sent to the first location 140 as indicated by arrow 146.
[00203] In particular, the present invention may comprise modalities according to the following clauses:
[00204] Clause 1: A method of manufacturing an eyeglass lens (10), the method being characterized by the following steps:
[00205] Providing an integral main lens, where the integral main lens has an anterior surface and a posterior surface, and where the integral main lens is at least one selected from a group consisting of a spherical energy lens, a lens of astigmatic energy, and a lens having an anterior surface major curvature on a first meridian and a posterior surface major curvature on the first meridian that are different from each other so as to provide a nonzero spherical energy; and
[00206] applying at least one additional lens element to at least a part of the front surface and/or at least a part of the rear surface, wherein at least one of the additional lens elements is constituted by at least one layer having a multiplicity of layer elements, in particular printed layer elements.
[00207] Clause 2: Method, according to clause 1, characterized in that the step of providing an integral main lens comprises the step of casting or injection molding of the integral main lens, and/or in that the step provision of an integral main lens comprises the step of coating the front surface and/or the back surface of the integral main lens, in particular where the coating step includes grinding and/or polishing.
[00208] Clause 3: Method according to clause 1 or 2, characterized in that the step of supplying the integral main lens comprises the supply of the integral main lens as a fully finished lens mold, where the anterior surface and the posterior surfaces are coated according to a prescription, in particular, where the spherical energy has a magnitude of at least 0.125 diopters.
[00209] Clause 4: Method according to any one of clauses 1 to 3, characterized in that the step of applying at least one additional lens element comprises applying the multiplicity of layer elements through an additive process , in particular, where the additive process is a three-dimensional printing process.
[00210] Clause 5: Method according to any one of clauses 1 to 4, characterized in that the step of applying at least one additional lens element comprises applying at least one additional lens element directly to the at least a portion of the front surface and/or at least a portion of the back surface of the integral main lens.
[00211] Clause 6: Method, according to any one of clauses 1 to 4, characterized in that the method further comprises the step of generating additional lens element separately from the integral main lens, and where the step of applying at least one additional lens element comprises adhering through an adhesive the at least one additional lens element to at least a portion of the front surface and/or to at least a portion of the back surface of the integral main lens.
[00212] Clause 7: Method according to any one of clauses 1 to 6, characterized in that the integral main lens consists of at least one selected from a group consisting of crown glass, Flint glass, plastics polymers, polycarbonate based plastics, polyamide based plastics, acrylate based plastics, polythiourethane based plastics, allyl diglycol carbonate (ADC) and any combination of these materials.
[00213] Clause 8. Method according to any one of clauses 1 to 7, characterized in that the additional lens element is made up of at least one selected from the group consisting of a polypropylene-based polymer, a styrene butadiene (ABS) acrylonitrile based polymer, a polyethylene terephthalate glycol (PET-G) based polymer, a polycarbonate based polymer, a polymethyl methacrylate (PMMA) based polymer, and any combination thereof materials.
[00214] Clause 9: Method according to any one of clauses 6 to 8, characterized in that the adhesive is at least one selected from a group consisting of light-initiated cure adhesives, for example, adhesives epoxy-based or acrylate-based adhesives, and cyanoacrylate-based adhesives, and any combination of these materials.
[00215] Clause 10. Method according to any one of clauses 1 to 9, characterized in that at least one additional lens element is applied to form a proximal part of the spectacle lens.
[00216] Clause 11. Method according to any one of clauses 1 to 9, characterized in that the step of applying at least one additional lens element comprises applying more than one additional lens element to form a multifocal glasses lens.
[00217] Clause 12. Method according to any one of clauses 1 to 11, characterized in that the multiplicity of layer elements is formed from at least two different materials, where at least two different materials have a refractive index different and/or different Abbe numbers.
[00218] Clause 13. Method according to any one of clauses 1 to 12, characterized in that the step of applying at least one additional lens element comprises applying at least a first additional lens element and at least minus a second additional lens element, where the first additional lens element is applied to a portion of the rear surface or front surface, and where the second additional lens element completely covers a respective surface between the front and rear surfaces of the integral main lens and the first additional lens element.
[00219] Clause 13b: Method according to any one of clauses 1 to 13, characterized in that the integral main lens comprises at least one recess or flat section on the anterior surface and/or the posterior surface, and where one of o at least one additional lens element is applied to each recess or flat section.
[00220] Clause 14. Spectacle lens comprising an integral main lens, where the integral main lens has an anterior surface and a posterior surface, and where the integral main lens is at least one selected from a group consisting of a lens of spherical energy, an astigmatic energy lens and a lens having a major anterior surface curvature on a first meridian and a posterior surface major curvature on the first meridian that are different from each other so as to provide a non-zero spherical energy, and characterized in that at least one of the additional lens elements is applied to at least a part of the front surface and/or at least a part of the back surface, wherein the at least one lens element is constituted by at least one layer having a multiplicity of layer elements, in particular printed layer elements.
[00221] Clause 15: Spectacle lens, according to clause 14, characterized in that the integral principal lens is a lens having a principal curvature of the anterior surface on a first meridian and a principal curvature of the posterior surface on the first meridian that are different from each other so as to provide a non-zero spherical energy, where the integral main lens comprises at least one recess or flat section in the front surface and/or the back surface, and where one of the at least one additional lens element is applied to each recess or flat section, in particular, where each of the at least one additional lens element has a refractive index and/or an Abbe number that is different from that of the integral main lens.

权利要求:
Claims (8)
[0001]
1. Method (100) of manufacturing an spectacle lens (10), the method being characterized by the following steps: providing (102) an integral main lens (12), wherein the integral main lens (12) has a surface anterior (14) and a posterior surface (16), and wherein the integral principal lens (12) is a lens having a principal curvature (18) of the anterior surface (14) at a first meridian and a principal curvature (20) of the posterior surface (16) on the first meridian that are different from each other so as to provide a non-zero spherical energy, wherein the integral main lens (12) comprises at least one flat section on the posterior surface (16), wherein each flat section is a surface part that has no curvature and is flat, wherein only the remaining part of the non-flattened back surface (16) comprises the main curvature (20), wherein the step of supplying (102) a integral main lens (12) buy where providing the integral main lens (12) as a fully finished lens mold, wherein the front surface (14) and the rear surface (16) are coated in accordance with a prescription, wherein the step of providing a lens integral main (12) comprises the step of casting or injection molding the integral main lens (12); and applying (104) at least one additional lens element (22) to at least a portion (24) of the rear surface (16), wherein at least one of the additional lens elements (22) comprises at least one layer (26-33) having a plurality of printed layer elements (35-37), and wherein one of the at least one additional lens element (22) is applied to each flat section, wherein the application step (104) of at least one additional lens element (22) comprises applying the multiplicity of layer elements by an additive process, in particular, wherein the additive process is a three-dimensional printing process, wherein the application step of at least one additional lens element (22) comprises applying at least one additional lens element (22) directly to at least a portion of the rear surface (16) of the integral main lens (12), wherein the at least an additional lens element (22) is applied to form a blade. rte near the spectacle lens (10), the proximal part providing added energy for near vision.
[0002]
2. Method according to claim 1, characterized in that the step of providing an integral main lens (12) comprises the step of coating the front surface (14) and/or the back surface (16) of the main lens integral (12), in particular where the coating step includes grinding and/or polishing.
[0003]
3. Method according to claim 1 or 2, characterized in that the spherical energy has a magnitude of at least 0.125 diopters.
[0004]
4. Method according to any one of claims 1 to 3, characterized in that the integral main lens (12) consists of at least one selected from a group consisting of crown glass, Flint glass, polymeric plastics , polycarbonate based plastics, polyamide based plastics, acrylate based plastics, polythiourethane based plastics, allyl diglycol carbonate (ADC) and any combination of these materials.
[0005]
5. Method according to any one of claims 1 to 4, characterized in that the additional lens element (22) consists of at least one selected from the group consisting of a polypropylene-based polymer , a polymer based on styrene butadiene acrylonitrile (ABS), a polymer based on polyethylene terephthalate glycol (PET-G), a polymer based on polycarbonate (PC), a polymer based on polymethyl methacrylate (PMMA) and any combination of these materials.
[0006]
6. Method according to any one of claims 1 to 5, characterized in that the multiplicity of layer elements is formed from at least two different materials, in which at least two different materials have a different refractive index and/or Different Abbe numbers.
[0007]
7. Spectacle lens (10), comprising an integral main lens (12), wherein the integral main lens (12) has an anterior surface (14) and a posterior surface (16), and wherein the integral main lens ( 12) is a lens having a major curvature (18) of the anterior surface (14) on a first meridian and a major curvature (20) of the posterior surface (16) on the first meridian that are different from each other so as to provide an energy non-zero spherical, wherein the integral main lens (12) is cast or injection molded, and characterized in that at least one of the additional lens elements (22) is applied to at least a portion (24) of the rear surface (16), wherein the at least one additional lens element (22) is constituted by at least one layer (26-33) having a plurality of printed layer elements (35-37) applied to three-dimensional printing process, in that the integral main lens (12) comprises p at least one flat section on the rear surface (16), wherein each flat section is a surface portion that has no curvature and is flat, wherein only the remaining non-flattened rear surface (16) portion comprises the main curvature (20), and wherein the at least one additional lens element (22) is applied to each flat section, wherein the integral main lens (12) is a fully finished lens mold, wherein the least one lens element A further (22) is applied directly to at least a portion of the rear surface (16) of the integral main lens (12), wherein the at least one additional lens element (22) forms a proximal portion of the spectacle lens (10) , where the near part provides addition energy for near vision.
[0008]
8. Spectacle lens (10) according to claim 7, characterized in that each of the at least one additional lens element (22) has a refractive index and/or an Abbe number that is different from that of the integral main lens (12).

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US10674904B2|2017-09-15|2020-06-09|M.P. Optics, LLC|Systems, methods and apparatuses for subjective self-refraction|

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EP3696578A1|2019-02-14|2020-08-19|Carl Zeiss AG|Refractive optical component and resulting spectacle lens, method for producing a refractive optical component, computer program product, construction data stored on a data carrier, device for additive manufacturing of a base body and spectacle lens|

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WO2020169691A1|2019-02-20|2020-08-27|Luxexcel Holding B.V.|Method for printing a multifocal lens|

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法律状态:
2015-09-15| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|

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2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2020-03-31| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-08-03| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-09-21| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 28/11/2014, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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EP13195130.3|2013-11-29|

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EP13195130.3A|EP2878989B1|2013-11-29|2013-11-29|Method for manufacturing a spectacle lens and spectacle lens|

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