• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The lens (2) comprises an inlet side (21), via which light (3) is coupled into the lens during operation, and an outlet side (22), via which light is coupled out of the lens during operation. The lens comprises on the exit side a plurality of mutually tilted exit surfaces (220). The entrance side is divided into a first section and a second section. The lens comprises at the entrance side in the first section alternately arranged first entrance surfaces (211) and tilted to these reflection surfaces (212), wherein in the direction away from the second portion of each first entrance surface is arranged downstream of a reflection surface. A light source (1) can be arranged with respect to the lens (2) such that light from the light source enters the lens via each first entrance surface during the operation of the light source, then is largely totally reflected at the directly downstream reflection surface and then via one or more exit surfaces the lens exits.
    公开号:AT520574A2
    申请号:T50916/2018
    申请日:2018-10-23
    公开日:2019-05-15
    发明作者:Lukanow Stephan
    申请人:Siteco Beleuchtungstechnik Gmbh；
    IPC主号:
    专利说明:

    LENS AND LIGHT MODULE
    A lens is specified. In addition, a light module is specified.
    An object to be solved is to provide a lens with which an asymmetrical light distribution can be achieved and which can be made flat in construction. Another object to be solved is to provide a light module with such a lens.
    In accordance with at least one embodiment, the lens comprises an entry side, via which light is coupled into the lens during normal operation, and an exit side, via which light is coupled out of the lens during normal operation. The entrance side and the exit side are preferably main extension sides of the lens.
    The lens is preferably elongate or extruded. For example, the lens has a centerline along which the lens mainly extends. The extension of the lens perpendicular to the centerline is, for example, a factor of at least 5 or at least 10 less than the extension of the lens along the centerline. The centerline may be a straight line or a curved line. The centerline may be a circle segment or ellipse segment.
    In accordance with at least one embodiment, the lens comprises on the exit side a plurality of exit surfaces which are tilted relative to each other. About the exit surfaces light is coupled out of the lens during normal operation of the lens. The area of each exit surface is preferably at least 5% or at least 10% of the area of the entire exit side. Two adjacent and mutually tilted exit surfaces are connected, for example, by an edge. The edge preferably forms a parallel curve to the center line of the lens. The angle between adjacent and mutually tilted exit surfaces is for example at least 5 ° or at least 10 ° or at least 15 °. Alternatively or additionally, the angle is at most 170 ° or at most 150 ° or at most 100 ° or at most 90 °. The angle between two surfaces is preferably understood as the smallest angle.
    In accordance with at least one embodiment, the entrance side of the lens is divided into a first section and a second section. The first section lies in a first half-space and the second section lies in a second half-space. That is, the entrance surface can be at least thoughtfully divided into at least two sections. The space filled by the lens or the light module can also be mentally divided into two half-spaces. An interface between the two half-spaces preferably cuts both the inlet side and the outlet side.
    In accordance with at least one embodiment, the lens comprises on the entry side in the first section alternately arranged first entrance surfaces and reflection surfaces tilted towards them. The entry surfaces and the reflection surfaces are alternately arranged one after the other in a direction away from the second section. In the direction away from the second section of each first entrance surface is arranged downstream of a reflection surface. The angle between the first entrance surface and the immediately adjacent or downstream reflection surface is, for example, at least 5 ° or at least 10 ° or at least 15 °. Alternatively or additionally, the angle is at most 150 ° or at most 100 ° or at most 60 ° or at most 45 °.
    The indication of the angle between one surface and another surface or between a surface and an axis in the case of curved or curved surfaces here and hereinafter refers to the angle between the chords of these surfaces or the angle between the chord of the surface and the axis. When viewed in a section plane, for example the C0 plane, the surfaces described here are line sections. A chord of a surface is the connecting line between the two boundary points of this line segment.
    In particular, the lens on the entrance side in the first section comprises two or more first entrance surfaces and two or more reflection surfaces.
    For example, the area of each first entrance surface and each reflection surface is at least 5% or at least 10% of the total area of the entrance side.
    The first entry surfaces and / or the reflection surfaces and / or the exit surfaces are preferably smooth within the manufacturing tolerance. "Smooth" means that a surface is free of protrusions or trenches whose extent is on the order of the extent of the surface. For example, a smooth surface is free of protrusions or trenches whose heights or depths or widths are more than 1/20 or more than 1/10 of the extent of the surface. The extent of a surface here means in particular the length of the section line of the surface with a sectional plane, for example the C0 plane.
    A surface may be curved or arched or flat. For example, if the surface is curved, a radius of curvature of the surface is at least 20% or at least 50% or at least 100% of the thickness of the lens. The thickness of the lens is defined below.
    One or more first light entry surfaces may be convexly curved. The radius of curvature can be the smaller the farther the first light entry surface is from the interface or from the second section. This leads to a better light control in the direction of the downstream reflection surfaces.
    One or more downstream reflective surfaces may be convexly curved. The radius of curvature can be smaller, the farther the reflection surface is from the boundary surface or from the second section. This leads to a better light control in the direction of the exit surfaces.
    In accordance with at least one embodiment, a light source can be arranged with respect to the lens such that light enters the lens via the first entrance surface during the operation of the light source, then for the most part at the immediately following reflection surface, for example at least 50% or at least 75% or at least 90% or at least 95%, is totally reflected and then exits via one or more exit surfaces of the lens.
    Each reflection surface can be associated with an exit surface, in particular be uniquely associated. For example, light that is totally reflected on a reflection surface strikes mostly or exclusively the correspondingly associated exit surface. These exit surfaces may be concave or arched toward the associated reflection surface. This curvature may cause the change in the direction of the light reflected on a reflection surface to be further changed in the same direction of rotation.
    Light from the light source, which strikes the lens, in particular on the first entrance surfaces, preferably comes directly from the light source and is not deflected by optical elements on the way to the lens. For example, the light source has a Lambertian emission profile and emits it to the lens.
    In other words, a light source can be arranged close to the entrance side and preferably in the area above and in the middle of the boundary between the first section and the second section, so that light from the light source strikes each of the first entrance surfaces and enters the lens via them. A large part or all of the light which has entered via a first entrance surface of the first section then impinges on the associated reflection surface and is totally totally reflected by it in the direction of the exit surfaces. For example, "near" is a distance from a light exit surface of the light source to the entrance side of less than 10 cm or less than 5 cm or less than 1 cm. Preferably, the light source is arranged so that light does not hit directly from the light source to the reflection surfaces.
    In at least one embodiment, the lens comprises an inlet side, via which light is coupled into the lens during normal operation, and an outlet side, via which light is coupled out of the lens during normal operation. The lens comprises at the exit side a plurality of mutually tilted exit surfaces. The entrance side is divided into a first section and a second section. The lens comprises at the entrance side in the first section alternately arranged first entrance surfaces and tilted to these reflection surfaces, wherein in the direction away from the second portion of each first entrance surface, a reflecting surface is arranged downstream. A light source can be arranged with respect to the lens such that when the light source is in operation via each first entrance surface, light from the light source enters the lens, then is totally totally reflected at the immediately downstream reflection surface and then exits the lens via one or more exit surfaces.
    The present invention is based, in particular, on the recognition that the use of a plurality of first entrance surfaces and reflection surfaces as described above enables the light propagating in the direction away from the second half space to be redirected particularly efficiently toward the second half space. This allows asymmetric light distribution while flat design of the lens.
    In accordance with at least one embodiment, a thickness of the lens is defined as a distance, for example as a maximum or average or minimum distance, between the inlet side and the outlet side. The thickness of the lens is for example at least 1 mm or at least 3 mm or at least 5 mm. Alternatively or additionally, the thickness of the lens is for example at most 10 mm or at most 8 mm.
    A length of the lens, if elongated or extruded, is defined as an extent along the center line of the lens. The lens has, for example, a length of at least 50 mm or at least 100 mm or at least 200 mm. Alternatively or additionally, the length of the lens is at most 500 mm or at most 400 mm or at most 300 mm.
    The width of the lens is defined, for example, as the extension of the lens perpendicular to the directions along which the thickness and the length are measured. The width of the lens is for example at least 5 mm or at least 10 mm. Alternatively or additionally, the width of the lens is, for example, at most 50 mm or at most 30 mm or at most 20 mm.
    According to at least one embodiment, each first entrance surface is connected to the immediately adjacent or downstream reflection surfaces via an edge. The edges between the reflective surfaces and the first entrance surfaces preferably form parallel curves to the centerline of the lens.
    According to at least one embodiment, the edges between the
    Reflection surfaces and the first entrance surfaces each have a radius of curvature of at least 1/50 or at least 1/40 or at least a 1/30 of the thickness of the lens. Alternatively or additionally, the radius of curvature of the edges between the first entrance surfaces and the reflection surfaces is at most 1/16 or at most 1/20 of the thickness of the lens. Corresponding radii of curvature may have the edges between the exit surfaces on the exit side.
    According to at least one embodiment, the lens is elongate or extruded. That is, the lens extends predominantly along a centerline through the lens. The length of the lens is defined as the extent along the associated center line.
    In accordance with at least one embodiment, the cross-sectional shape of the lens over a majority of the length of the lens is the same within the manufacturing tolerance. Thus, looking at the lens in a sectional plane perpendicular to the center line, especially in the C0 plane, and then shifting this cutting plane along the center line, the shape of the lens is in most cases the same. For example, much of the length of the lens is at least 50% or at least 75% of the length of the lens.
    In accordance with at least one embodiment, the lens extends along a main plane of extension. The main extension plane is in particular a compensation plane through the lens. The main plane of extension is thus a plane through the lens to which the mean square distance of the lens surface is minimal.
    In accordance with at least one embodiment, the first entry surfaces and the reflection surfaces extend transversely, for example at an angle of at least 20 ° or at least 30 °, to the main extension plane. The interface between the two half-spaces preferably also extends transversely to the main plane of extension.
    According to at least one embodiment, the lens is formed in one piece or in one piece. That is, all areas of the lens are integrally formed with each other and contain the same material or are made of the same material.
    For example, the lens is made of one piece. Within the scope of the manufacturing tolerance, the interior of the lens is thus preferably free of boundary surfaces at which the light can be broken.
    For example, the lens comprises glass or plastic or is made of glass or plastic. The plastic is for example PMMA.
    In accordance with at least one embodiment, the reflective surfaces are polished
    Outside surfaces of the lens. By "polished surfaces" is meant in particular those surfaces having a roughness of at most 500 nm or at most 300 nm or at most 200 nm or at most 100 nm. Preferably, the first entrance surfaces are polished outer surfaces of the lens.
    Roughening refers to structures on a surface that give the surface a profile or roughness. The roughness is a measure of the variation of the surface height of the corresponding surface produced by the structures. For example, for roughening, only structures that produce a small variation in surface height are counted. For example, a "small variation" is a variation that is small compared to the extent of the surface, for example, at most 1/10 or at most 1/20 or at most 1/100 as large as the surface area. This makes it possible to distinguish the roughness of a surface, which is often inadvertent and difficult to control, from intentionally introduced structures.
    The roughness can be the average roughness. That is, the roughness indicates the mean distance of a measurement point on the surface to a center surface. The center surface intersects within a measuring range the true profile of the surface so that the sum of the measured profile deviations relative to the center surface becomes minimal. Alternatively, the roughness may also be the square roughness, ie the mean square profile deviation from the central surface, or the maximum roughness, ie the maximum measured profile deviation from the middle surface.
    The fact that the reflection surfaces are polished, the probability of total reflection is increased. The reflection surfaces are preferably free of an opaque, reflective coating. The reflection at the reflection surfaces is thus achieved only by total reflection, but not by reflection.
    According to at least one embodiment, the exit surfaces are roughened
    Outside surfaces of the lens. For example, the outer surfaces are provided with an average roughness of at least 1 μm or at least 1.3 μm or at least 1.5 μm. The roughening of the exit surfaces is used in particular to compensate for possible tolerances and unwanted color effects.
    According to at least one embodiment, the lens is designed so that a light emitted by the light source, which strikes the second portion, within the lens largely, ie at least 50% or at least 75%, undergoes no total reflection.
    In accordance with at least one embodiment, the lens on the inlet side in the second section comprises a plurality of second inlet surfaces tilted relative to each other. For example, an edge with a radius of curvature as defined above is formed between two adjacent second entry surfaces. The areas of the second
    Admission areas are for example at least 5% or at least 10% of the total area of the entrance side. An angle between the chords of two adjoining second entry surfaces is for example at least 10 ° or at least 30 ° or at least 50 ° or at least 90 ° or at least 120 °. Alternatively or additionally, the angle is at most 180 ° or at most 170 ° or at most 90 ° or at most 60 ° or at most 30 °. The angle between two tendons is preferably understood as the smallest angle.
    The second entry surfaces are preferably smooth and / or polished, with "smooth" and "polished" as defined above.
    The second entry surfaces are preferably tilted with respect to a main extension plane of the lens. Particularly preferably, the further the second entrance surfaces are tilted with respect to the main extension plane, the farther they are from the first section.
    In accordance with at least one embodiment, the lens in the first section comprises exactly two first entrance surfaces and exactly two reflection surfaces.
    In accordance with at least one embodiment, the first entrance surface located farther away from the second section is the larger of the two first entry surfaces.
    In accordance with at least one embodiment, the reflection surface farther away from the second section is the larger of the two reflection surfaces.
    In accordance with at least one embodiment, the lens in the second section comprises exactly two second entry surfaces.
    In accordance with at least one embodiment, the lens comprises one, in particular exactly one, central entrance surface and one central exit surface. For example, the middle entrance surface is partly in the first section and partly in the second section. In particular, the interface between the two half-spaces extends through both the central entrance surface and the central exit surface.
    The middle entry surface may adjoin a first entry surface and / or a second entry surface.
    In the first section or in the first half-space, the middle entrance surface is formed by a first surface section, which is preferably convexly curved.
    In accordance with at least one embodiment, the mean exit area is designed so that light which enters the lens via the central entrance area and then exits via the central exit area is broken down to the second half space.
    In addition, a light module is specified. The light module preferably comprises a lens as described above. That is, all features disclosed in connection with the lens are also disclosed for the light module and vice versa.
    A light module can also be referred to as a light.
    In accordance with at least one embodiment, the lighting module comprises a light source and a lens according to one or more of the embodiments described above. The light source emits light in the direction of the lens during operation. The lens then causes a deflection of the incident light.
    The light source may comprise one or more LEDs (short: LEDs).
    For example, the LEDs are arranged along a center line one behind the other and spaced from each other. The light source can then be regarded as elongated. The extension of the light source along the center line is preferably larger, for example by a factor of at least 5 or at least 10, than the extension of the individual LEDs.
    The centerline may be a straight line or a curved line. The centerline may be a circle segment or ellipse segment. For example, the centerline of the lens is a parallel curve to the centerline of the light source.
    The light source extends, for example, along a main plane of extension.
    Considered in the C0 plane is the light intensity generated by the light source
    Distribution curve in the polar diagram, in particular substantially symmetrical with respect to the 0 ° emission axis. A maximum of the light intensity distribution curve at 0 ° is preferred. The light intensity distribution curve in each case surrounds an area on both sides of the 0 ° emission axis. "Substantially symmetrical" means that after reflection of one surface to the other surface on the 0 ° emission axis, the surfaces overlap at least 85%, or at least 90%, or at least 95%. The 0 ° emission axis is thus in the polar diagram of the C0 plane in particular as a
    Defined axis that forms a mirror axis for the light intensity distribution curve generated by the light source substantially.
    In an elongated light source having a longitudinal axis or centerline, or a plurality of LEDs, the C0 plane is a plane perpendicular to the longitudinal axis or to the centerline. The C90 plane is a plane that includes the longitudinal axis or centerline. If the C0 plane is displaced along the center line or longitudinal axis, the 0 ° emission axis reshapes an area which is referred to here as the 0 ° emission surface. The 0 ° emission area generally corresponds to the C90 plane. Preferably, the light source emits light substantially symmetrically with respect to the 0 ° emission surface.
    The thickness of the lens can also be considered as the extension of the lens along the 0 °
    Emission axis to be defined when viewed in the C0 plane.
    For example, the width of the lens is defined as the extent of the lens viewed in the C0 plane perpendicular to the 0 ° emission axis.
    For example, the width of the light source is also defined as the extent of the light source viewed in the C0 plane perpendicular to the 0 ° emission axis. The width of the light source is, for example, at most 1/3 or at most 1/4 or at most 1/5 or at most 1/6 of the width of the lens. The light source is in particular arranged centrally above the lens.
    The lens is preferably positioned relative to the light source such that a majority, ie at least 50% or at least 75%, of the light emitted by the light source strikes the lens. The 0 ° emission axis of the C0 plane preferably cuts the lens.
    The lens is arranged in particular spaced from the light source. A medium between the lens and the light source is, for example, a gas, such as air. The distance between the lens and a light exit surface of the light source is, for example, between 1 mm and 10 cm inclusive, or between 1 mm and 1 cm inclusive.
    The light source emits light preferably both in the first half space and in the second half space. Viewed in the C0 plane, the first section or the first half-space is preferably located on one side of the 0 ° emission axis, the second section and the second half space on the other side of the 0 ° emission axis. For example, if the light source is extruded or elongated, the 0 ° emission surface is an interface between the first and second portions and between the first half space and the second half space. That is, the intersecting line of the 0 ° emission surface with the entrance side divides the entrance side into the first and second sections.
    When both the lens and the light source are extruded or elongate, the 0 ° emission surface preferably intersects the length of the lens, for example along the center line of the lens.
    In accordance with at least one embodiment, the inlet side of the lens faces the light source. The exit side of the lens is then turned away from the light source. The light emitted by the light source enters the lens via the entrance side. At the exit side, the light exits the lens. Preferably, no light from the light source hits the exit side before it has passed through the lens. For example, each connecting line between a point on the exit side and the light source crosses the entrance side.
    In particular, when the light source is switched on, in each case a part of the light coupled into the lens is coupled out over several or all outer surfaces.
    In accordance with at least one embodiment, the light source is arranged with respect to the lens such that, in operation, light from the light source striking the first portion is mostly, ie at least 50% or at least 75%, from the lens towards the second portion is directed in the direction of the second half space.
    In accordance with at least one embodiment, the light source is arranged with respect to the lens such that, in operation, light from the light source enters the lens via each first entrance surface. Subsequently, this light is sent to the immediate downstream
    Reflection surfaces totally reflected. Thereafter, the light exits via one or more exit surfaces of the lens.
    In other words, the lens is designed and arranged with respect to the light source so that, in operation, a part of the light emitted by the light source into the first half-space hits each of the first entrance surfaces. After entering via a first entrance surface, the light then falls onto a reflection surface arranged downstream of the first entrance surface. On the way from a first entrance surface to the directly downstream reflection surface, the light is preferably neither refracted nor reflected. The reflection surfaces are designed such that the light entering from the light source via the first entry surfaces and then falling onto the reflection surface largely, for example, at least 50% or at least 75% or at least 90% or at least 95%, at an angle greater than Total reflection angle hits the reflection surfaces. Due to the total reflection at the reflection surfaces, the light is then directed in the direction of the exit side. The mutually tilted exit surfaces on the exit side are preferably selected so that the light impinging on them is not totally reflected. About the exit of the lens is effected, whereby the light can be directed further towards the second half space.
    In accordance with at least one embodiment, the lens and the light source are designed and aligned such that a majority, ie at least 50% or at least 75% or at least 90% or at least 95%, of the light entering the lens in the second section passes through the lens Lens is deflected by a maximum of 45 °. In particular, the lens in the second half space is formed such that the majority of the light entering the lens from the light source within the lens is not totally reflected.
    In accordance with at least one embodiment, the lens and the light source are configured and aligned with each other such that at least 50%, or at least 75%, or at least 80% of the light entering the lens through the lens in the first portion is displaced by at least 45 ° ° is deflected. In particular, the lens in the first half space is thus designed so that the majority of the light entering the lens from the light source inside the lens undergoes total reflection.
    In accordance with at least one embodiment, in the CO plane, each first entrance surface of the first section with respect to the light source covers an acceptance angle of at least 5 ° or at least 10 ° or at least 15 ° or at least 20 °. Alternatively or additionally, viewed in the C0 plane, each first entrance surface in the first section with respect to the light source covers an acceptance angle of at most 40 ° or at most 38 °.
    In this case, the fact that one surface or a plurality of surfaces covers or has a certain acceptance angle means that a light bundle with a divergence angle or opening angle corresponding to the acceptance angle can be emitted by the light source such that the light beam completely strikes this surface or these surfaces. in particular without first meeting other elements of the lens. An acceptance angle is in particular a coherent angular range.
    In accordance with at least one embodiment, the first entry surfaces and / or the second entry surfaces are aligned with respect to the light source such that viewed in the C0 plane, a light coming from the light source strikes the respective entry surface at an angle of at most 60 ° or at most 45 °. The angle is measured with respect to the normal to the surface.
    In accordance with at least one embodiment, the reflection surfaces in the first section are designed so that the entire light entering via a first entrance surface and coming from the light source strikes the immediately downstream reflection surface. From the directly downstream reflection surface, the light is then totally or completely totally reflected. In particular, the reflection surface located downstream of a first entrance surface is larger than the first entry surface.
    According to at least one embodiment, the light entering via the first entrance surfaces in the first section and coming from the light source is totally totally reflected once before it exits the lens again. In other words, the light entering from the light source via the first entry surfaces is totally reflected exclusively at the directly downstream reflection surfaces. During operation, for example, at least 30% or at least 40% of the total light coupled into the lens enters from the light source via the first and second sections.
    In accordance with at least one embodiment, in operation, light from the light source enters the lens via every second entrance surface of the second section and then exits the lens via one or more exit surfaces. After entering the lens via a second entrance surface, the light preferably falls on an exit surface without being refracted or reflected on the way there.
    According to at least one embodiment, viewed in the C0 plane, the chords of the second entrance surfaces of the second section are tilted by an angle α with respect to the 0 ° emission axis. The angle α is an acute angle.
    In accordance with at least one embodiment, the angle α increases the closer a second entrance surface is to the 0 ° emission axis.
    In accordance with at least one embodiment, in the CO plane, each second entrance surface with respect to the light source covers an acceptance angle of at least 5 ° or at least 10 ° or at least 20 ° or at least 30 °. Alternatively or additionally, each second entrance surface covers an acceptance angle of at most 45 ° or at most 40 °.
    One or more second entry surfaces may be convexly curved.
    In accordance with at least one embodiment, the central entrance surface has an edge. The edge preferably runs in the second section or second half-space. The edge is formed between the first surface portion of the central entrance surface and a second surface portion of the central entrance surface. The second surface section preferably runs exclusively in the second section of the inlet side of the lens and forms the majority of the central entrance surface in the second section.
    The second surface section includes, for example, an angle of at most 30 ° with the 0 ° emission axis. This ensures that unwanted scattered radiation that would degrade the desired asymmetry of the luminous intensity distribution is suppressed. At the second entrance surfaces, which are far enough away from the interface, such a training is no longer necessary. The second surface portion may be curved or flat.
    In accordance with at least one embodiment, the central entrance surface, viewed in the C0 plane, covers an acceptance angle of at least 30 ° or at least 35 ° with respect to the light source. Alternatively or additionally, that of the middle
    Entrance surface covered acceptance angles to be at most 50 ° or at most 45 °. The acceptance angle of the central entrance surface in the first half-space is preferably greater than in the second half-space.
    In accordance with at least one embodiment, each second entry surface is arranged downstream of and associated with an exit surface in the direction away from the light source. The assignment of the exit surface to the second entry surface is preferably one-to-one. The exit surfaces can each be convexly curved.
    In accordance with at least one embodiment, each exit surface assigned to the second entry surfaces is selected such that the entire light entering via a second entry surface and coming from the light source is coupled out via the associated exit surface.
    According to at least one embodiment, viewed in the C0 plane, the chord of each exit surface downstream of and associated with a second entry surface is inclined at an angle β to the 0 ° emission axis. The angle β is an acute angle.
    In accordance with at least one embodiment, the angle β becomes greater, the closer to a second entrance surface upstream and downstream exit surface at the 0 °
    Emission axis is.
    In accordance with at least one embodiment, the lens and the light source are aligned with one another and designed so that a light intensity distribution curve of the light module, viewed in the C0 plane, a maximum, in particular a global maximum, at
    Angle between 10 ° and 30 ° inclusive. The angle is measured with respect to the 0 ° emission axis. The maximum is especially in the second half space.
    Considering the luminous intensity distribution curve of the luminous module in the C0 plane and then translating the C0 plane along the center line of the lens or the light source, the luminous intensity distribution curve is preferably the same almost everywhere along the center line.
    In accordance with at least one embodiment, the first cover in the C0 plane
    Entry surfaces, the middle entrance surface and the second entry surfaces all together with respect to the light source from an overall acceptance angle. The total acceptance angle is, for example, between 160 ° and 180 ° inclusive, preferably between 165 ° and 175 ° inclusive.
    In accordance with at least one embodiment, the first cover in the C0 plane
    Entry surfaces, the central entrance surface and the second entrance surfaces all together with respect to the light source at least the acceptance angle range between -80 ° and + 80 ° inclusive, preferably between -84 ° and + 84 °, and / or at most the acceptance angle range between -86 ° and + 86 ° down.
    The acceptance angle range of a surface is the emission angle range in which light rays emitted by the light source strike this surface, the angles being indicated with respect to the 0 ° emission axis. For light rays emitted in the first half-space, the angle is given negative. For light rays that are emitted into the second half space, the angles are given positive.
    That one surface or a plurality of surfaces have a specific one
    Acceptance angle range, in the present case means that each light from the light source, which is emitted at an angle within this range of acceptance angle incident on the surface or one of the surfaces, in particular without previously hitting another surface.
    In accordance with at least one embodiment, in the C0 plane, the first entry surfaces together with respect to the light source altogether cover an acceptance angle of at least 45 ° or at least 50 °. Alternatively or additionally, the first entry surfaces together may cover an acceptance angle of at most 75 ° or at most 70 ° or at most 60 °.
    According to at least one embodiment, in the C0 plane, the first entrance surfaces together with respect to the light source together cover an acceptance angle of at least 30% and / or at most 45% of the total acceptance angle.
    According to at least one embodiment, in the C0 plane, the first entrance surfaces with respect to the light source together cover at least the acceptance angle range between -80 ° and -30 °, preferably between -84 ° and -28 °, and / or at most the acceptance angle range between inclusive -86 ° and -25 °.
    In accordance with at least one embodiment, the lens comprises exactly two first ones
    Entry surfaces.
    In accordance with at least one embodiment, in the CO plane, the first entrance surface located farther away from the second section, with respect to the light source, covers an acceptance angle of at least 30 ° or at least 34 °. Alternatively or additionally, the first entrance surface located farther away from the second section can cover an acceptance angle of at most 40 ° or at most 38 °.
    In accordance with at least one embodiment, the closer first entrance surface arranged on the second section covers an acceptance angle of at least 15 ° or at least 18 °. Alternatively or additionally, the first entrance surface arranged closer to the second section can cover an acceptance angle of at most 25 ° or at most 22 °.
    In accordance with at least one embodiment, in the CO plane, the first entrance surface located farther away from the second section with respect to the light source covers an acceptance angle of at least 16% and / or at most 27% of the total acceptance angle.
    In accordance with at least one embodiment, the closer first entrance surface arranged on the second section covers an acceptance angle of at least 8% and / or at most 17% of the total acceptance angle.
    According to at least one embodiment, in the CO plane, the first entrance surface located farther away from the second section, with respect to the light source, covers at least the acceptance angle range between -80 ° and -53 °, preferably between -84 ° and -49 °, and / or at most the acceptance angle range between -86 ° and -47 ° inclusive.
    In accordance with at least one embodiment, the closer first entrance surface arranged on the second section with respect to the light source covers at least the acceptance angle range between -45 ° and -35 °, preferably between -48 ° and -28 °, and / or at most the acceptance angle range between -49 inclusive ° and -26 °.
    According to at least one embodiment, viewed in the C0 plane, the second entry surfaces together with respect to the light source altogether cover an acceptance angle of at least 45 ° or at least 55 ° or at least 65 °. Alternatively or additionally, the second entry surfaces together may cover an acceptance angle totaling at most 90 ° or at most 80 ° or at most 75 °.
    In accordance with at least one embodiment, the second cover in the C0 plane
    Incident surfaces with respect to the light source together from an acceptance angle of at least 40% and / or at most 50% of the total acceptance angle from.
    In accordance with at least one embodiment, the second cover in the C0 plane
    Entrance surfaces with respect to the light source together at least the
    Acceptance angle range between + 20 ° and + 80 ° inclusive, preferably between + 16 ° and + 84 °, and / or at most the acceptance angle range between + 14 ° and + 86 °.
    In accordance with at least one embodiment, the lens comprises exactly two second ones
    Entry surfaces.
    In accordance with at least one embodiment, in the CO plane, the second entrance surface located farther away from the first section, with respect to the light source, covers an acceptance angle of at least 30 ° or at least 35 °. Alternatively or additionally, the second located further away from the first section covers
    Entrance surface from an acceptance angle of at most 45 ° or at most 40 °.
    In accordance with at least one embodiment, the closer second entrance surface arranged on the first section covers an acceptance angle of at least 25 ° or at least 30 °. Alternatively or additionally, the second entrance surface arranged closer to the first section can cover an acceptance angle of at most 40 ° or at most 35 °.
    According to at least one embodiment, in the CO plane, the second entrance surface located farther away from the first section, with respect to the light source, covers an acceptance angle of at least 15% and / or at most 26% of the light source
    Total acceptance angle from.
    In accordance with at least one embodiment, the closer second entrance surface disposed on the first section covers an acceptance angle of at least 12% and / or at most 27% of the total acceptance angle.
    According to at least one embodiment, in the CO plane, the second entrance surface located farther away from the first section with respect to the light source covers at least the acceptance angle range between + 53 ° and + 80 ° inclusive, preferably between + 48 ° and + 84 °, and / or at most the acceptance angle range between + 45 ° and + 86 °.
    In accordance with at least one embodiment, the closer second entrance surface arranged on the first section covers at least the acceptance angle range between + 20 ° and + 40 °, preferably between + 16 ° and + 47 °, and / or at most the acceptance angle range between +13 inclusive ° and + 50 °.
    In accordance with at least one embodiment, in the C0 plane, the average entrance surface with respect to the light source covers an acceptance angle of at least 20% and / or at most 30% of the total acceptance angle.
    According to at least one embodiment, in the C0 plane, the central entrance surface with respect to the light source covers at least the acceptance angle range between -20 ° and + 10 °, preferably between -27 ° and + 15 °, and / or at most the acceptance angle range between inclusive. 29 ° and + 17 ° down.
    Hereinafter, a lens described here and a light module described herein with reference to drawings using exemplary embodiments will be explained in more detail. The same reference numerals indicate the same elements in the individual figures. However, there are no scale relationships shown, but individual elements can be shown exaggerated for better understanding.
    Show it:
    1 shows an embodiment of a light module and a lens in perspective view,
    FIGS. 2 to 5 embodiments of a lighting module and a lens in a cross-sectional view,
    FIG. 6 shows an exemplary embodiment of one generated by a lighting module
    Luminous intensity distribution curve in the C0 plane and the C90 plane.
    FIG. 1 shows an exemplary embodiment of a lighting module in a perspective view. The light module comprises a lens 2 according to an embodiment and a light source 1.The light source 1 and the lens 2 are elongated, their dimensions along their longitudinal axes or central axes are each at least five times greater than their extensions perpendicular to the longitudinal axes. The lens 2 is spaced from the light source 1. The medium between the light source 1 and the lens 2 is for example air. The lens 2 is made, for example
    Plastic. The light source 1 comprises a plurality of LEDs arranged along the center line.
    In FIG. 1, the C90 plane 13 is shown as a dashed plane. The C90 plane extends parallel to the longitudinal axis of the light source 1 and intersects the lens 2 longitudinally. The C90 plane divides the space into a first half space 11 and a second half space 12 and forms an interface between the two half spaces.
    In FIG. 1, the C0 plane 10 is shown as a dashed plane. It runs perpendicular to the longitudinal axes of the light source 1 and the lens. 2
    The light source 1 emits light in the direction of the lens 2 during normal operation. For this purpose, the light source 1 comprises, for example, a plurality of LEDs which are arranged linearly next to one another along the longitudinal axis. The lens 2 extends parallel to the linear array of LEDs.
    The lens 2 has no LED-related cross structures. Their shape is thus independent of the distance of the LED arrangement.
    The light source 1 emits light into both the first half space 11 and the second half space 12. The light intensity distribution curve generated by the light source 1 is preferably symmetrical with respect to the C90 plane and the C0 plane.
    The lens 2 comprises an inlet side 21 facing the light source 1 and one of the
    Light source 1 opposite exit side 22. Further, the lens 2 comprises at its longitudinal ends mounting arms 25 for attachment of the lens 2 to a support.
    FIG. 2 shows a cross-sectional view of the lighting module of FIG. 1, the sectional plane being the C0 plane. The 0 ° emission axis 14 in the C0 plane corresponds to the intersection of the C90 plane 13 with the C0 plane 10 of FIG. 1.
    The entrance side 21 of the lens 2 is divided into a first section and a second section. The first section lies in the first half space 11, the second section lies in the second half space 12. The lens 2 comprises first entrance surfaces 211 and reflection surfaces 212 on the entry side 21 in the first section. The first entry surfaces 211 and the reflection surfaces 212 are arranged alternately next to one another. In the direction away from the second portion of each first entrance surface 211 is a reflecting surface 212 immediately downstream. The first entrance surfaces 211 are tilted with respect to the directly downstream reflection surfaces 212 and with these by a
    Edge 213 connected. The angle between the chords of a first entrance surface 211 and the immediately downstream reflection surface is in each case between 5 ° and 60 °. The radius of curvature 213 of the edges is between 1/50 and 1/16 of the thickness of the lens 2. The thickness of the lens 2 is defined as the minimum or maximum or average distance between the entrance side 21 and the exit side 22.
    At the exit side 22, the lens 2 comprises a plurality of exit surfaces 220, which are tilted against each other.
    The lens 2 comprises at the inlet side 21 in the second section a plurality of mutually tilted second entrance surfaces 221. The second entrance surfaces 221 are also connected to each other by an edge, wherein the
    Radius of curvature of the edges is in the range specified above. The angle between the chords of the two adjacent second entry surfaces 221 is at least 120 ° or at least 160 °.
    With respect to the 0 ° emission axis 14, the chords of the second entrance surfaces 221 are each tilted by an acute angle α. The angle α is greater, the closer a second entrance surface 221 is to the 0 ° emission axis 14.
    The lens 2 further comprises at the entrance side 21 a convexly curved, middle
    Entrance surface 201. The middle entrance surface 201 is crossed by the 0 ° emission axis 14. The middle entrance surface 201 faces a central exit surface 202, through which the 0 ° emission axis 14 also passes.
    The light source 1 does not overlap with the first along the 0 ° emission axis 14
    Entry surfaces 211 and the reflective surfaces 212.
    The beam path of the light emitted by the light source 1 (see solid
    Lines) 3 is influenced by the shape of the lens 2 in the first half space 11 as follows. On each of the first entrance surfaces 211 of the first section of the entrance side 21, the light 3 emitted by the light source 1 into the first half-space 11 strikes and enters the latter
    Lens 2 on. The light rays entering via the first entrance surfaces 211 first strike the reflection surfaces 212 which are each directly downstream of the first entry surfaces 211 in the beam direction and are totally reflected at these. After
    Total reflection then hit the light rays on the exit surfaces 220 of the exit side 22 and exit therefrom from the lens 2.
    Due to the shape of the lens 2 in the first half-dream 11, a large part of the first in the first
    Half space 11 on the lens 2 of incident light deflected by more than 45 °, causing the
    Light 3 is deflected in the direction of the second half space 12.
    The shape of the lens 2 in the second half space 12 has an influence on the light 3 emitted by the light source 1. The emitted into the second half space 12
    Light rays impinge on the second entrance surfaces 221, pass through them into the lens 2, pass from there directly to the exit surfaces 220 and exit there from the lens 2. The light beams emitted into the second half space 12 thus preferably receive no total reflection by the lens 2 and are largely deflected by the lens 2 by less than 45 °.
    The middle entrance surface 201 and the middle exit surface 202 have the following influence on the light 3 emitted by the light source 1. Light 3 of the light source 1, which enters the lens 2 via the middle entry surface 201, then passes to the middle
    Exit surface 202. The central exit surface 202 is tilted so that the light 3 during
    Exit from the central exit surface 202 predominantly in the direction of the second
    Halfspace 12 is broken.
    Overall, therefore, the light emitted by the light source 1 is initially redistributed by the shape of the lens 2, symmetrically with respect to the 0 ° emission axis 14, and is distributed in
    Direction of the second half space 12 located, so that an overall asymmetric
    Light intensity distribution curve arises.
    The profile of the entrance side 21 of the lens 2 in the cross-sectional view shown is in
    Described below along a path from the first half space 11 into the second half space 12. Starting from the farthest from the 0 ° emission axis 14 remote
    Reflection surface 212 increases the entrance side 21 in the direction of the light source 1 to a maximum. At the maximum, the entry side 21 merges into a first entry surface 211. Along this first entrance surface 211, the entry side 21 drops steeply to a minimum. At the minimum, the entrance side 21 goes into another
    Reflection surface 212 via. Along the further reflection surface 212 rises
    Entry side 21 again to a further maximum at which the entrance side 21 merges into a further first entrance surface 211. The further maximum is lower than the maximum. Along the further first entrance surface 211, the entry side 21 drops steeply again.
    This is followed by a mean entrance surface 201 of the inlet side 21, in which the inlet side 21 initially rises and then drops again. In the middle entry surface 201, the 0 ° emission axis 14 crosses the entry side 21.
    After the middle entry surface 201, a second entry surface 221 follows, along which the entry side 21 rises. This is followed by a further second entrance surface 221, along which the entry side 21 rises steeper than in the preceding second
    Entrance side 221.
    FIG. 3 shows the same cross-sectional view of the lighting module as shown in FIG. In addition, however, here are the acceptance angle ranges and the
    Acceptance angle of the first entrance surfaces 211, the second entrance surfaces 221 and the central entrance surface 201 shown. Each first entrance surface 211 covers an acceptance angle of at least 20 °. Each second entrance surface 221 covers an acceptance angle of at least 30 °. The central entrance surface 201 covers the acceptance angle range between -27.25 ° and 15.02 ° inclusive. The mean entrance surface has an acceptance angle of 42.27 °.
    In FIG. 4, in turn, the lighting module is viewed in the C0 plane. The light module of Figure 4 comprises in addition to the light source 1 and the lens 2, a carrier 4, on which the light source 1 is arranged and electrically connected. The lens 2 is fixed to the carrier 4 by means of the mounting arms 25.
    The light module further comprises a cover 5 which is arranged downstream of the light source 1 and the lens 2 in the beam direction, so that the light 3 leaving the lens 2 strikes the cover 5. With the cover 5, the beam path of the light 3 can be further influenced. In Figure 5, the cover 5 is contoured to reduce surface reflectance losses at shallow angles. The cover 5 can also be designed plan. The surface of the cover 5 may be optically smooth. Preferably, the surface of the cover 5 is provided with a scattering structure. This can be provided on the side facing the light source 1 and / or on the side facing away from the light source 1 of the cover 5.
    In addition to its optical properties, the cover 5 protects the lens 2 from external
    Influences, such as pollution, and prevents a user with live
    Parts of the carrier 4 comes into contact.
    The lighting module of Figure 4 further comprises a frame 6 to which the cover 5 is attached. The light source 1 and the lens 2 are completely from the carrier 4, the
    Surrounded frame 6 and the cover 5.
    FIG. 5 once again shows the light module described in FIG.
    In addition, however, light rays are still shown in FIG. 5 (see solid lines).
    In Fig. 6, a luminous intensity distribution curve 30 generated by the luminous module of the previous embodiments is in the C0 plane and a luminous intensity
    Distribution curve 31 shown in the C90 plane. The shape of the lens 2 provides for a
    Deflection of the light 3 predominantly in the second half space 12, so that the light intensity distribution curve 30 in the C0 plane is asymmetrical with respect to the 0 ° emission axis 14 and has a global maximum in the second half space 12. The maximum is around 20 °.
    On the other hand, in the C90 plane, the luminous intensity distribution curve 31 is substantially symmetrical with a maximum at about 0 °.
    The invention is not limited by the description based on the embodiments of these. Rather, the invention includes every new feature and every combination of features, which in particular any combination of features in the
    Claims, even if these features or this combination itself is not explicitly stated in the claims or exemplary embodiments.
    This patent application claims the priority of German Patent Application 102017125212.6, the disclosure of which is hereby incorporated by reference.
    LIST OF REFERENCES 1 light source 2 lens 3 light 4 support 5 cover 6 frame 10 C0 plane 11 first half space 12 second half space 13 C90 plane 14 0 ° emission axis 21 entrance side 22 exit side 25 mounting arm 201 middle entrance surface 202 middle exit surface 211 first entrance surface 212 reflection surface 220 Exit surface 221 second entrance surface
    权利要求:
    Claims (18)
    [1]
    claims
    1. Lens (2), comprising - an inlet side (21) via which light (3) is coupled into the lens (2) during normal operation, and an outlet side (22), via which, in normal operation, light (3) the lens (2) is decoupled, wherein - the lens (2) on the outlet side (22) comprises a plurality of mutually tilted exit surfaces (220), - the inlet side (21) is divided into a first portion and a second portion, - Lens (2) on the inlet side (21) in the first section alternately arranged first entrance surfaces (211) and tilted to these reflection surfaces (212), wherein in the direction away from the second portion of each first entrance surface (211) downstream of a reflection surface (212) is, - a light source (1) with respect to the lens (2) can be arranged that during operation of the light source (1) via each first entrance surface (211) light (3) from the light source (1) enters the lens (2) , then on the immediately following reflection surface (212) is largely totally reflected and then exits via one or more exit surfaces (220) from the lens (2).
    [2]
    2. Lens (2) according to claim 1, wherein - a thickness of the lens (2) as a distance between the inlet side (21) and the outlet side (22) is defined, - each first entrance surface (211) with the immediately adjacent reflection surface (212 ) is connected via an edge (213), - the edges (213) each have a radius of curvature between 1/50 and 1/16 of the thickness of the lens (2), - the angle between the first entry surfaces (211) and the immediate adjacent reflecting surfaces (212) each between 5 ° and 45 ° inclusive.
    [3]
    A lens (2) according to any one of the preceding claims, wherein - the lens (2) is elongated, - the cross-sectional shape of the lens (2) is the same over a majority of the length of the lens (2) within the manufacturing tolerance.
    [4]
    A lens (2) according to any one of the preceding claims, wherein - the lens (2) extends along a principal plane of extent, - the first entrance surfaces (211) and the reflection surfaces (212) are transverse to the principal plane of extent.
    [5]
    5. lens (2) according to any one of the preceding claims, wherein the lens (2) is integrally formed.
    [6]
    A lens (2) according to any one of the preceding claims, wherein the reflecting surfaces (211) are polished outer surfaces of the lens (2).
    [7]
    A lens (2) according to any one of the preceding claims, wherein the exit surfaces (220) are roughened outer surfaces of the lens (2).
    [8]
    A lens (2) according to any one of the preceding claims, wherein the lens (2) is designed so that a light (3) emitted by the light source (1) which strikes the second portion is largely within the lens (2) no total reflection experiences.
    [9]
    9. lens (2) according to the preceding claim, wherein the lens (2) on the inlet side (21) in the second section a plurality of mutually tilted second inlet surfaces (221).
    [10]
    10. lens (2) according to any one of the preceding claims, wherein - the lens (2) in the first section exactly two first entrance surfaces (211) and exactly two reflection surfaces (212), - further away from the second section lying first entrance surface ( 211) is the larger of the two first entry surfaces (211), - the further away from the second section reflection surface (212) is the larger of the two reflection surfaces (212).
    [11]
    11. Light module, comprising - a lens (2) according to one of the preceding claims, - a light source (1) which emits in operation light (3) in the direction of the lens (2), wherein - the inlet side (21) of the light source ( 1) and the exit side (22) faces away from the light source (1), - the first section of the entry side (21) lies in a first half space (11) and the second section lies in a second half space (12), - Light source (1) is arranged with respect to the lens (2) that in operation, light (3) from the light source (1), which meets the first portion, largely in the direction of the second half-space (12) is directed, wherein During operation, light (3) from the light source (1) enters the lens (2) via each first entrance surface (211), is then largely totally reflected at the directly downstream reflection surface (212) and then via one or more exit surfaces (220) the lens (2) emerges.
    [12]
    12. Luminous module according to the preceding claim, wherein the lens (2) and the light source (1) are designed and aligned with each other such that - a majority of in the second section in the lens (2) and entering from the light source (1) incoming light (3) through the lens (2) is deflected by at most 45 °, - a majority of in the first section in the lens (2) entering and from the light source (1) coming light (3) through the lens (2) is deflected by at least 45 °.
    [13]
    13. Light module according to one of the preceding claims, wherein viewed in the C0 plane, each first entrance surface (211) of the first section with respect to the light source (1) covers an acceptance angle of at least 5 °.
    [14]
    14. Luminous module according to one of the preceding claims, wherein the first entry surfaces (211) and / or the second entry surfaces (221) are aligned with respect to the light source (1) that viewed in a C0 plane coming from the light source (1) Light at an angle of at most 60 ° to the respective entrance surface, wherein the angle with respect to the normal is measured on the surface.
    [15]
    15. Light module according to one of the preceding claims, wherein the reflection surfaces (212) in the first section are designed so that the entire on a first entrance surface (211) entering and from the light source (1) coming light (3) on the immediately following reflection surface (212) hits.
    [16]
    16. Illuminating module according to one of the preceding claims, wherein the over the first entrance surfaces (211) entering in the first section and from the light source (1) coming light (3) is totally totally reflected once before it exits the lens (2) again.
    [17]
    17. Illuminating module according to at least claim 9, wherein - seen in the C0 plane, the chords of the second entrance surfaces (221) of the second section are tilted at an angle α with respect to the 0 ° emission axis, - the closer the angle α is second entrance surface (221) at the 0 ° emission axis.
    [18]
    18. Luminous module according to one of the preceding claims, wherein the lens (2) and the light source (1) are aligned with each other and designed so that a luminous intensity distribution curve (30) of the lighting module, considered in the C0 plane, a maximum at a Angle between 10 ° and 30 ° inclusive.
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    同族专利:
    公开号 | 公开日
    DE102017125212A1|2019-05-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH701116A1|2009-05-25|2010-11-30|Code Lighting Sa|Device surface lighting, with at least one light source type emitting diode.|
    AU2013204682B2|2009-05-29|2015-09-24|Ideal Industries Lighting Llc|Lens with controlled backlight management|
    CN105276522B|2014-06-30|2019-04-30|欧普照明股份有限公司|A kind of spreadlight lens for LED lamp and the LED lamp with the spreadlight lens|DE202020102825U1|2020-05-18|2020-06-19|Nimbus Group Gmbh|Asymmetrical linear lens and associated linear lamp|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017125212.6A|DE102017125212A1|2017-10-27|2017-10-27|LENS AND LIGHT MODULE|
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