METHOD FOR MAKING A TRANSPARENT OPTICAL ELEMENT, OPTICAL COMPONENT USED IN SAID METHOD AND RESULTING OPTICAL ELEMENT

• US 20090316110A1
• Filed: 12/15/2005
• Published: 12/24/2009
• Est. Priority Date: 12/17/2004
• Status: Abandoned Application

• Current Assignee: Essilor International SA
• Original Assignee: Essilor International SA
• Inventors: Bovet, Christian, Cano, Jean-Paul
• Application Number:
  US11/721,587
• Publication Number:
  US 20090316110A1
• Time in Patent Office: Days
• US Class Current: 351/163
• CPC Class Codes: B29D 11/0073 Optical laminates
• CPC Class Codes: G02C 2202/18 Cellular lens surfaces
• CPC Class Codes: G02C 7/083 Electrooptic lenses
• CPC Class Codes: G02C 7/101 having an electro-optical light valve electro-optical elements per se G02F
• CPC Class Codes: G02C 7/102 Photochromic filters
• CPC Class Codes: G02C 7/12 Polarisers
• CPC Class Codes: G02F 1/133377 Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel

Abstract

The invention concerns a method for making a transparent optical element (11), which consists in first producing an optical component (10) having at least a transparent assembly of cells (15) juxtaposed parallel to a surface of the component, each cell being hermetically sealed and containing a substance with optical property. Said optical component is then cut out along the contour defined on its surface, corresponding to a shape specific for the optical element. The cells of the assembly have dimensions ranging between 100 μm and 500 μm parallel to the surface of the component.

Claims

1. A process for producing a transparent optical element, comprising the following steps:

producing an optical component having at least one transparent array of cells that are juxtaposed parallel to one surface of the component, each cell having dimensions between 100 μ

m and 500 μ

m parallel to the surface of the component and being hermetically sealed and containing a substance having an optical property; and

cutting the optical component along a defined contour on said surface, corresponding to a predetermined shape of the optical element.

2. The process as claimed in claim 1, which furthermore includes a step of drilling through the optical component in order to fasten the optical element to a holding support.

3. The process as claimed in either of claims 1, in which the production of the optical component comprises the formation of the array of cells on a rigid transparent substrate.

4. The process as claimed in claim 3, in which the production of the optical component comprises the formation of the array of cells within a flexible transparent film followed by the transfer of said film onto a rigid transparent substrate.

5. The process as claimed in claim 3, in which the rigid transparent substrate is convex on that side which receives the array of cells.

6. The process as claimed in claim 3, in which the rigid transparent substrate is concave on that side which receives the array of cells.

7. The process as claimed in claim 3, in which the rigid transparent substrate is planar on that side which receives the array of cells.

8. The process as claimed in claim 1, in which the substance having an optical property contained in the array of cells is in liquid form.

9. The process as claimed in claim 1, in which the substance having an optical property contained in the array of cells is in gel form.

10. The process as claimed in claim 8, in which the production of the optical component comprises the formation, on a substrate, of a network of walls for defining the cells parallel to said surface of the component, a collective or individual filling of the cells with the substance having an optical property in the form of a liquid or gel, and the closing of the cells on their side opposite from the substrate.

11. The process as claimed in claim 8, in which the optical property is chosen from a coloration, photochromism, polarization or refractive-index property.

12. The process as claimed in claim 11, in which the optical property is a photochromism property.

13. The process as claimed in claim 1, in which the array of cells includes several groups of cells containing different substances.

14. The process as claimed in claim 1, in which several arrays of cells are stacked over the thickness of the component.

15. The process as claimed in claim 14, in which the stack comprises at least two stacked arrays of cells, each array of cells having identical optical properties, or each array of cells having different optical properties, or the cells within each array of cells having different optical properties.

16. The process as claimed in claim 1, in which the production of the optical component comprises the formation on a substrate of a network of walls in order to define the cells parallel to said surface of the component, a filling of the cells with the substance or substances having an optical property, and the sealing of the cells on their side opposite from the substrate.

17. The process as claimed in claim 1, in which the array of cells has a fill factor between 90% and 99.5% inclusive parallel to said surface of the component.

18. The process as claimed in claim 17, in which the fill factor is between 96% and 98.5% inclusive.

19. The process as claimed in claim 1, in which the dimension of the cells parallel to the surface of the component is around 200 μ

m.

20. The process as claimed in claim 1, in which the cells are separated by walls with a thickness of between 0.10 μ

m and 5 μ

m parallel to the surface of the component.

21. The process as claimed in claim 20, in which the walls have a thickness of between 0.10 μ

m and 0.35 μ

m.

22. The process as claimed in claim 20, in which the walls have a thickness of between 0.40 μ

m and 2.00 μ

m.

23. The process as claimed in claim 22, in which the walls have a thickness of between 2.00 μ

m and 3.5 μ

m inclusive.

24. The process as claimed in claim 1, in which the array of cells constitutes a layer having a thickness of between 1 μ

m and 50 μ

m inclusive.

25. The process as claimed in claim 24, in which the array of cells constitutes a layer with a thickness of between 5 μ

m and 20 μ

m inclusive.

26. The process as claimed in claim 1, in which the cells have dimensions parallel to the surface of the component of around 200 μ

m and are mutually separated by walls having a thickness of around 2 μ

m, the array of cells constituting a layer with a thickness of 5 μ

m.

27. The process as claimed in claim 1, in which the cells have dimensions parallel to the surface of the component of around 200 μ

m and are mutually separated by walls having a thickness of around 3 μ

m, the array of cells constituting a layer with a thickness of 20 μ

m.

28. The process as claimed in claim 1, in which the cells of the array are arranged in a lattice satisfying a crystal geometry chosen from a square, triangular, rectangular, octagonal or hexagonal geometry, and a combination of several of said geometries.

29. The process as claimed in claim 28, in which the cells of the array are arranged in a hexagonal-type lattice.

30. An optical component, comprising at least one transparent array of cells that are juxtaposed parallel to one surface of the component, each cell having dimensions between 100 μ

m and 500 μ

m parallel to the surface of the component and being hermetically sealed and containing a substance having an optical property.

31. The optical component as claimed in claim 30, comprising a rigid transparent substrate on which the array of cells is formed.

32. The optical component as claimed in claim 30, comprising a rigid transparent substrate onto which a transparent film incorporating the array of cells is transferred.

33. The optical component as claimed in claim 31, in which the rigid transparent substrate is convex on the side having the array of cells.

34. The optical component as claimed in claim 31, in which the rigid transparent substrate is concave on the side having the array of cells.

35. The optical component as claimed in claim 31, in which the rigid transparent substrate is planar on the side having the array of cells.

36. The optical component as claimed in claim 30, in which the substance having an optical property contained in at least certain of the cells is in liquid form.

37. The optical component as claimed in claim 30, in which the substance having an optical property contained in at least certain of the cells is in gel form.

38. The optical component as claimed in claim 30, in which the optical property is chosen from a coloration, photochromism, polarization or refractive index property.

39. The optical component as claimed in claim 38, in which the optical property is a photochromism property.

40. The optical component as claimed in claim 30, in which the array of cells includes several groups of cells containing different substances.

41. The optical component as claimed in claim 30, in which several arrays of cells are stacked over the thickness of said component.

42. The optical component as claimed in claim 41, in which the stack comprises at least two stacked arrays of cells, each array of cells having identical optical properties, or each array of cells having different optical properties, or the cells within each array of cells having different optical properties.

43. The optical component as claimed in claim 30, in which the array of cells has a fill factor between 90% and 99.5% inclusive, parallel to said surface of the component.

44. The optical component as claimed in claim 43, in which the fill factor is between 96% and 98.5% inclusive.

45. The optical component as claimed in claim 30, in which the dimension of the cells parallel to the surface of the component is around 200 μ

m.

46. The optical component as claimed in claim 30, in which the cells are separated by walls having a thickness of between 0.10 μ

m and 5 μ

m, parallel to the surface of the component.

47. The optical component as claimed in claim 46, in which the walls have a thickness of between 0.10 μ

m and 0.35 μ

m.

48. The optical component as claimed in claim 46, in which the walls have a thickness of between 0.40 μ

m and 2.00 μ

m.

49. The optical component as claimed in claim 46, in which the walls have a thickness of between 2.00 μ

m and 3.5 μ

m.

50. The optical component as claimed in claim 30, in which the array of cells constitutes a layer having a thickness of between 1 μ

m and 50 μ

m inclusive.

51. The optical component as claimed in claim 50, in which the array of cells constitutes a layer with a thickness of between 5 μ

m and 20 μ

m inclusive.

52. The optical component as claimed in claim 30, in which the cells have dimensions parallel to the surface of the component of around 200 μ

m and are mutually separated by walls having a thickness of around 2 μ

m, the array of cells constituting a layer with a thickness of 5 μ

m.

53. The optical component as claimed in claim 30, in which the cells have dimensions parallel to the surface of the component of around 200 μ

m and are mutually separated by walls having a thickness of around 3 μ

m, the array of cells constituting a layer with a thickness of 20 μ

m.

54. The optical component as claimed in claim 30, in which the cells of the array are arranged in a lattice satisfying a crystalline geometry chosen from a square, triangular, rectangular, octagonal or hexagonal geometry, and a combination of several of said geometries.

55. The optical component as claimed in claim 54, in which the cells of the array are arranged in a hexagonal-type lattice.

56. The use of an optical component as claimed in claim 30 in the manufacture of a transparent optical element chosen from ophthalmic lenses, contact lenses, ocular implants, lenses for optical instruments, filters, optical sight lenses, eye visors, and optics for illumination devices.

57. A spectacle lens, produced by cutting an optical component according to claim 30.

58. The spectacle lens as claimed in claim 57, in which at least one hole is drilled through the component in order to fasten the lens to a spectacle frame.

59. The spectacle lens as claimed in claim 62, in which the substance contained in the cells is a photochromic substance.