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EP-4735239-A1 - METHOD FOR MANUFACTURING AN OPTICAL DEVICE, MANUFACTURING DEVICE FOR MANUFACTURING THE OPTICAL DEVICE, THE OPTICAL DEVICE AND EYEWEAR

EP4735239A1EP 4735239 A1EP4735239 A1EP 4735239A1EP-4735239-A1

Abstract

Method for manufacturing an optical device, manufacturing device for manufacturing the optical device, the optical device and eyewear Method for manufacturing an optical device, manufacturing device for manufacturing the optical device, the optical device and eyewear. The optical device comprises a first optical element and a second optical element. The method comprises a step of placing on a support a plurality of layers comprising successively the first optical element, a layer of a compression-activated glue, the second optical element. The layer of the compression- activated glue is between the first optical element and the second optical element. The support comprises spacers placed around the plurality of layers. The spacers have a height superior to a height of the plurality of the layers. The method also comprises a step of placing a layer of an elastic material covering the plurality of the layers and the spacers and a step of compressing the plurality of the layers to achieve a compression of the compression-activated glue above a predetermined compression level.

Inventors

  • MEYNEN, MATHIEU
  • LE GUEN, SOPHIE

Assignees

  • ESSILOR INTERNATIONAL

Dates

Publication Date
20260506
Application Date
20240617

Claims (15)

  1. 1. Method for manufacturing an optical device, the optical device comprising a first optical element (402) and a second optical element (502), the method comprising: • placing (301) on a support (102) a plurality of layers comprising successively: o the first optical element (402), o a layer (503) of a compression-activated glue and o the second optical element (502) the layer (503) of the compression-activated glue being between the first optical element (402) and the second optical element (502), the support (102) comprising spacers (103) placed around the plurality of the layers, the spacers (103) having a height superior to a height of the plurality of the layers, the method also comprising: ■ placing (302) a layer (601) of an elastic material covering the plurality of the layers and the spacers (103) and ■ compressing (303) the plurality of the layers to achieve a compression of the compression-activated glue above a predetermined compression level.
  2. 2. The method according to the claim 1 , the layer (601) of the elastic material is constituted of an elastomer for example a silicone.
  3. 3. The method according to the claim 1, the layer (601) of the elastic material has a hardness between 10A and 90A shore.
  4. 4. The method according to any one of the claims 1 to 3, the method also comprising, selecting the height of the spacers (103) according to a thickness of the layer (601) of the elastic material and/or according to a type of the elastic material.
  5. 5. The method according to any one of the claims 1 to 4, the spacers (103) being parallel to a longitudinal axis of the first optical element (402) or a longitudinal axis of the second optical element (502).
  6. 6. The method according to any one of the claims 1 to 5 the spacers (103) and the support (102) being monobloc.
  7. 7. The method according to the claim 6 the spacers (103) and the support (102) forming together a jig.
  8. 8. The method according to any one of the claims 1 to 7, the compression (303) being realized by a roll-to-roll lamination machine or the compression (303) being realized by a press for example a hydraulic press or the compression (303) being realized by a stamp.
  9. 9. The method according to any one of the claims 1 to 8 the first optical element (402) and the second optical element (502) being chosen among: • non-active optical elements, and • active optical elements.
  10. 10. The method according to any one of the claims 1 to 9, the method also comprising, when a face of the first optical element (402) facing the support (102) is not planar or a face of the second optical element (502) facing the layer (601) of the elastic material is not planar, adding a compensation module (403) between the support (102) and the first optical element (402) or between the second optical element (502) and the layer (601) of the elastic material, the compensation module (403) being a substantially flat element, a first face of the compensation module (403) being planar, a second face of the compensation module (403) having a shape interlocking with a shape of the non-planar face of the first optical element (502) or of the non-planar face of the second optical element (602).
  11. 11. The method according to any one of the claims 1 to 10, the height of the spacers (103) being chosen so that a difference between the height of the spacers (103) and the height of the plurality of the layers allows a correct compression of the compression-activated glue without damaging the first optical element (402) or the second optical element (502).
  12. 12. The method according to any one of the claims 1 to 10, a difference between the height of the spacers (103) and the height of the plurality of the layers being between 50pm and 400pm.
  13. 13. Manufacturing device (101) comprising: a support (102) comprising spacers (103), compression means (101 -a), the manufacturing device (101) being configured for manufacturing an optical device, the optical device comprising a first optical element (402) and a second optical element (502), the manufacturing device (101) being configured for: • placing on a support (102) a plurality of layers comprising successively: o the first optical element (402), o a layer (503) of a compression-activated glue and o the second optical element (502) the layer (503) of the compression-activated glue being between the first optical element (402) and the second optical element (502), the spacers (103) being placed around the plurality of the layers, the spacers (103) having a height superior to a height of the plurality of the layers, the manufacturing device (101) being also configured for: ■ placing a layer (601) of an elastic material covering the plurality of the layers and the spacers (103) and ■ compressing, using the compression means (101-a), the plurality of the layers to achieve a compression of the compression-activated glue above a predetermined compression level.
  14. 14. Optical device comprising a first optical element (402) and a second optical element (502), the first optical element (402) and the second optical element (502) being glued together, the optical device being formed by: • placing on a support (102) a plurality of layers comprising successively: o the first optical element (402), o a layer (503) of a compression-activated glue and o the second optical element (502) the layer (503) of the compression-activated glue being between the first optical element (402) and the second optical element (502), the support (102) comprising spacers (103) placed around the plurality of the layers, the spacers (103) having a height superior to a height of the plurality of the layers, the optical device being also formed by: ■ placing a layer (601) of an elastic material covering the plurality of the layers and the spacers (103) and ■ compressing the plurality of the layers to achieve a compression of the compression- activated glue above a predetermined compression level.
  15. 15. Eyewear comprising an optical device, the optical device comprising a first optical element (402) and a second optical element (502), the first optical element (402) and the second optical element (502) being glued together, the optical device being formed by: • placing on a support (102) a plurality of layers comprising successively: o the first optical element (402), o a layer (503) of a compression-activated glue and o the second optical element (502) the layer (503) of the compression-activated glue being between the first optical element (402) and the second optical element (502), the support (102) comprising spacers (103) placed around the plurality of the layers, the spacers (103) having a height superior to a height of the plurality of the layers, the optical device being also formed by: ■ placing a layer (601) of an elastic material covering the plurality of the layers and the spacers (103) and compressing the plurality of the layers to achieve a compression of the compression- activated glue above a predetermined compression level.

Description

TITLE: Method for manufacturing an optical device, manufacturing device for manufacturing the optical device, the optical device and eyewear DESCRIPTION Technical field [0001]This disclosure relates to methods for manufacturing an optical device, manufacturing device for manufacturing the optical device, the optical device and eyewear comprising the optical device. The optical device is constituted of two optical elements glued together. Background information and prior art [0002] According to some bounding methods of the state of the art, the optical elements may be glued together using compression-activated glue. The compression-activated glue may be located between the two optical elements. To activate the glue, one may apply a compression on one or two of the two optical elements. [0003] Using these bounding methods of the state of the art, the compression may be inhomogeneous or too important. [0004] This inhomogeneous compression may lead to imperfect activation of the glue. The imperfect activation of the glue may lead to inaccurate optical properties of the optical device. This too-important compression may lead to the deformation or breakage of one of the optical elements or two of the optical elements. The deformation may lead to inaccurate optical properties of the optical device. [0005] A method, according to this disclosure, allows gluing together two optical elements to form an optical device by avoiding the drawbacks previously described. [0006] The following presents a simplified summary to provide a basic understanding of various aspects of this disclosure. This summary is not an extensive overview of all contemplated aspects and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. The sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. [0007] One aspect of this disclosure is a method for manufacturing an optical device. The optical device comprises a first optical element and a second optical element. The method comprises a step of placing on a support a plurality of layers comprising successively the first optical element, a layer of a compression-activated glue, the second optical element. The layer of the compression-activated glue is between the first optical element and the second optical element. The support comprises spacers placed around the plurality of layers. The spacers have a height superior to a height of the plurality of the layers. The method also comprises a step of placing a layer of an elastic material covering the plurality of the layers and the spacers and a step of compressing the plurality of the layers to achieve a compression of the compression-activated glue above a predetermined compression level. [0008] The manufacturing method of this disclosure also has the advantage of overcoming a lack of planeness of the surface of the first optical element or the second optical element and obtaining a better bounding of the optical elements with a reduced risk of breakage of the first optical element and/or the second optical element. [0009] Another aspect of this disclosure is a manufacturing device. The manufacturing device comprises a support comprising spacers, and compression means. The manufacturing device is configured for manufacturing an optical device. The optical device comprises a first optical element and a second optical element. The manufacturing device is configured for placing on a support a plurality of layers comprising successively the first optical element, a layer of a compression-activated glue and the second optical element. The layer of the compression-activated glue is between the first optical element and the second optical element. The spacers are placed around the plurality of the layers, the spacers having a height superior to a height of the plurality of the layers. The manufacturing device is also configured for placing a layer of an elastic material covering the plurality of the layers and the spacers and compressing, using the compression means, the plurality of the layers to achieve a compression of the compression-activated glue above a predetermined compression level. [0010] Another aspect of this disclosure is an optical device. The optical device comprises a first optical element and a second optical element. The first optical element and the second optical element are glued together. The optical device being formed by placing on a support a plurality of layers comprising successively the first optical element, a layer of a compression-activated glue and the second optical element. The layer of the compression- activated glue is between the first optical element and the second optical element. The support comprises spacers placed around the plurality of the layers. The spacers have a height superior to a height of the plurality of the layers. The optical device is a