• 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 present invention relates to an optical lens comprising a substrate (2) transparent, a liquid (4) deposited on the substrate (2) and constituting the optical medium of the lens, said liquid (4) being encapsulated on the substrate (2) hermetically by means of a thin layer of polymer (6). Said substrate (2) is made of an elastomeric material, the optical lens comprises mechanical deformation means arranged to apply a force (F) to said thin polymer layer (6) causing the deformation of the substrate (2) to modify the focal length of the lens.
    公开号:CH708527B1
    申请号:CH01350/14
    申请日:2014-09-08
    公开日:2018-12-28
    发明作者:Keppner Herbert；Laux Edith；Farine-Brunner Sophie；Jeandupeux Laure；Grange David；Piervittori Loïc
    申请人:Haute Ecole Arc；
    IPC主号:
    专利说明:

    Description
    Technical Field [0001] The present invention relates to an optical lens comprising a transparent substrate, a liquid deposited on the substrate and constituting the optical medium of the lens, said liquid being encapsulated on the substrate hermetically by means of a thin layer of polymer. A method of modifying the focal length of such an optical lens is also presented.
    State of the art [0002] Such a lens and its manufacturing process are described in patent EP 1 672 394. This patent describes more particularly the deposition of a thin film of poly-para-xylylene or parylene on a liquid. Various applications are described, and in particular focal micro-lenses determined by the materials used. A lens with variable focus is also achieved by housing under the liquid a heating resistor. When the heating resistor produces a rise in temperature of the liquid, the latter expands, thus modifying the geometry of the lens and its optical properties, so as to vary its focal length.
    However, the use of heating resistor is not possible in all applications, including to achieve implantable intraocular lenses.
    An object of the present invention is therefore to provide new optical lenses, including implantable intraocular lenses, whose focal length can be changed.
    Disclosure of the invention [0005] For this purpose, and in accordance with the present invention, there is provided an optical lens comprising a transparent substrate, a liquid deposited on the substrate and constituting the optical medium of the lens, said liquid being encapsulated on the substrate hermetically by means of a thin layer of polymer. According to the invention, said substrate is made of an elastomeric material and the optical lens comprises mechanical deformation means arranged to apply a force on said thin polymer layer causing the deformation of the substrate to modify the focal length of the lens.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood on reading the following description of an embodiment given by way of example and with reference to the drawings in which: FIG. 1 schematically shows the steps of the method of manufacturing an optical lens according to the invention, and FIG. 2 schematically represents the steps of the method for modifying the focal length of an optical lens according to the invention.
    Embodiment (s) of the invention [0007] Referring to FIG. 1, the present invention relates to an optical lens 1 comprising a transparent substrate 2, a liquid 4 deposited on the substrate 2 and constituting the optical medium of the lens, said liquid being encapsulated on the substrate 2 hermetically by means of a thin film of polymer 6.
    [0008] A transparent substrate has a transmission typically greater than 90% of the visible part of the solar spectrum.
    The optical medium of the lens is a liquid 4 which is applied to the transparent substrate 2 which forms a trap for perfectly defining the shape and diameter of the lens. The quantity of liquid 4 (contact angle, surface energy) makes it possible to define its curvature and its optical power. The drop takes an ideal shape by minimizing its surface.
    The drop of liquid 4 is then encapsulated by a thin layer of polymer 6 according to the method described in EP 1 672 394. This process makes it possible to perfectly preserve the shape of the lens. The deposit is made on the liquid and optionally on at least the neighboring portion of its substrate.
    The polymer is chosen to exhibit the encapsulation properties of a liquid by deposition of a thin layer by a low pressure deposition process to form a homogeneous continuous thin film.
    [0012] Advantageously, the polymer is poly-para-xylylene or parylene.
    Those skilled in the art know the polymers capable of being deposited in the form of a thin layer by a low pressure deposition process, such as CVD, PECVD, said process comprising a phase deposition polymerization step steam, or ALD. The polymer is formed by chain polymerization as described in
    Encyclopedia of Polymer Science and Technology, Wiley, New York (2005), 12, 589-593. Parylene, obtained from di-para-xylylene, is a typical example of a polymer known to be deposited by a low pressure deposition process. But other monomers capable of polymerizing by chain polymerization, such as Teflon or SiO 2, can be used.
    At the end of the process, a film of polymer and preferably of uniform and continuous parylene covers the liquid-substrate assembly, thus forming an envelope perfectly matching its contours.
    The liquid 4 must be chemically unreactive with the polymer. The saturation vapor pressure of the liquid should be of the order or lower than the pressure in the deposition chamber. The liquid 4 may be a silicone oil or an optical oil with, for example, a refractive index of 1.4. The higher the refractive index, the less distortion will be necessary.
    According to the invention, the transparent substrate 2 is made of an elastomeric material.
    Advantageously, said elastomer material has a Young's modulus of between 0.1 MPa and 500 MPa.
    Preferably, the elastomeric material is a bicomponent cold vulcanizable elastomer, preferably an RTV elastomer (Room Temperature Vulcanizing).
    Preferably, the elastomeric material is silicone-based. In particular, the Neukasil RTV 23 elastomer marketed by Altropol can be used.
    According to the invention, the optical lens comprises mechanical deformation means arranged to apply an external force on the thin polymer layer, causing the deformation of the substrate to change the focal length of the lens.
    These deformation means may comprise for example a mechanical or electromechanical actuator arranged to apply an external force preferably at the periphery of the thin polymer layer.
    Advantageously, said mechanical deformation means may comprise two frames 8a, 8b (FIG 2) or two rings arranged on either side of the lens, preferably at its level. periphery.
    In a particularly advantageous manner, the optical lens according to the invention is an implantable intra-traular optical lens of modifiable focal length, the focal length can be adapted according to the distance of the object.
    It is also presented a method for modifying the focal length of an optical lens as described above, comprising the application of an external force on said optical lens for deforming the substrate in order to modify the focal length. of said optical lens.
    Preferably, the external force is applied to the thin polymer layer, preferably at the periphery of said thin polymer layer, and more particularly perpendicularly to the substrate. It is obvious that the external force can also be applied laterally to the substrate.
    According to the applications, the external force is applied by means of mechanical deformation arranged to apply said external force on the thin polymer layer, and more particularly at its periphery.
    As shown in FIG. 2, the mechanical deformation means comprising the two frames 8a, 8b are arranged to apply an external force F on the periphery of the thin polymer layer 6.
    Accordingly, the liquid 4 which is close to the outside (thin) of the lens is mechanically moved inwardly reducing the effective volume available in the lens. The preservation of the volume filled by the incompressible liquid 4 increases the pressure inside the lens. The force on the walls of the lens causes deformation of said walls. The only degree of freedom to maintain the volume causes a deformation of the elastomeric substrate 2. Thus, the lens according to the invention changes from a plano-convex configuration to a bi-convex configuration, allowing a modification of the focal length of said lens. .
    In a particularly advantageous manner, when the optical lens constitutes an implantable intraocular optical lens, the external force is applied by the ciliary muscles.
    权利要求:
    Claims (6)
    [1]
    1. Optical lens (1) comprising a transparent substrate (2), a liquid (4) deposited on the substrate (2) and constituting the optical medium of the lens, said liquid (4) being encapsulated on the substrate (2) hermetically by means of a thin polymer layer (6), characterized in that said substrate (2) is made of an elastomeric material and in that the optical lens comprises mechanical deformation means arranged to apply a force (F) on said thin polymer layer (6) causing deformation of the substrate (2) to change the focal length of the lens (1).
    [2]
    2. Optical lens (1) according to claim 1, characterized in that said elastomeric material has a Young's modulus of between 0.1 MPa and 500 MPa.
    [3]
    3. Optical lens (1) according to any one of claims 1 and 2, characterized in that said elastomeric material is silicone-based.
    [4]
    4. Optical lens (1) according to any one of claims 1 to 3, characterized in that the polymer is po-ly-para-xylylene.
    [5]
    5. Optical lens (1) according to any one of claims 1 to 4, characterized in that said mechanical deformation means comprise two frames (8a, 8b) disposed on either side of the optical lens (1).
    [6]
    6. Optical lens (1) according to any one of the preceding claims, characterized in that it constitutes an implantable intraocular optical lens of changeable focal length.
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    同族专利:
    公开号 | 公开日
    CH708527A2|2015-03-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2016-12-15| PFA| Name/firm changed|Owner name: HAUTE ECOLE ARC, CH Free format text: FORMER OWNER: HAUTE ECOLE ARC, CH |
    2019-06-14| NV| New agent|Representative=s name: BOVARD SA NEUCHATEL CONSEILS EN PROPRIETE INTE, CH |
    2021-04-30| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    EP13184201|2013-09-12|
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