Transparent optical component having cells filled with optical material
View Patent ↗A transparent optical component having cells ( 1 ) filled with an optical material is proposed, which has a high transparency. The cells of the component are filled to levels (h 1 , . . . , h 5 ) which vary randomly, and the variations of which are adapted so as not to cause a perceptible optical defect. To do this, the fill levels of the cells are adapted so that the phase shifts experienced by the light rays (R 1 , . . . , R 5 ) which pass through the cells have a root mean square deviation of less than one quarter of the wavelength ( 1 ). Such a component may in particular be an ophthalmic lens.
1. Method for the production of a transparent optical component having cells filled with optical material, said method comprising the following steps:
/1/ obtaining a base optical component comprising a set of separate cells juxtaposed parallel to a surface of said component, each cell being open with an opening section parallel to the surface of the component; and
/2/ introducing an optical material into the inside of each cell up to an average fill level (h 1 , . . . , h 5 ) determined for this cell, and measured along a direction perpendicular to the surface of the component,
wherein random or pseudo-random variations of the average fill levels of the cells (h 1 . . . , h 5 ) are introduced voluntarily between at least some of the cells of the component,
the variations of the fill levels (h 1 . . . , h 5 ) between the different cells of the component are determined so that phase shifts respectively for rays of a visible light (R 1 . . . , R 5 ) passing through the cells along said direction perpendicular to the surface of the component have a root mean square deviation of less than one quarter of a wavelength (λ) of said light, and
said fill levels of the cells are selected so as to exhibit a discontinuity between at least two of the cells.
2. Method according to claim 1 , characterized in that the variations of the fill levels (h 1 . . . , h 5 ) are determined so that the phase shifts respectively for the rays of visible light (R 1 . . . , R 5 ) passing through the cells along the direction perpendicular to the surface of the component have a root mean square deviation of less than one eighth of the wavelength (λ).
3. Method according to claim 1 , wherein the respective fill levels of the cells (h 1 . . . , h 5 ) are digitally determined.
4. Method according to claim 1 , wherein the optical material is inserted into each cell in step /2/ in the form of multiple portions, each having one same basic volume, and wherein the variations in the fill levels (h 1 . . . , h 5 ) are produced by varying the number of portions introduced into different cells of the component.
5. Method according to claim 4 , wherein said basic volume is comprised between 0.1 and 50 picoliters.
6. Method according to claim 1 , wherein the optical material is inserted into each cell in step /2/ using a nozzle for spraying a substance.
7. Method according to claim 1 , further comprising the following step:
/3/ sealing the cells using a portion of a sealing material extending over the opening section of each cell.
8. Method according to claim 7 , wherein the step /3/ comprises arranging a transparent film over the cell set, said film being fixed onto separation walls situated between the cells.
9. Method according to claim 1 , wherein the transparent optical component comprises a lens.
10. Method according to claim 9 , wherein the transparent optical component comprises an ophthalmic spectacle lens.
11. Method according to claim 1 , wherein the base optical component comprises a layered structure itself incorporating the set of cells, and wherein said layered structure is fixed on a substrate of the optical component after step /2/.
12. Transparent optical component comprising a set of separate cells juxtaposed parallel to a surface of said component, each cell being filled with an optical material up to an average fill level (h 1 . . . , h 5 ) measured for said cell along a direction perpendicular to the surface of the component,
wherein the average fill levels of the cells (h 1 . . . , h 5 ) have random or pseudo-random variations between at least some of the cells of the component,
the variations in the fill levels (h 1 . . . , h 5 ) between different cells are adapted so that the phase shifts respectively for rays of a visible light (R 1 . . . , R 5 ) passing through the cells along said direction perpendicular to the surface of the component have a root mean square deviation of less than one quarter of a wavelength (λ) of said light, and
said fill levels of the cells are selected so as to exhibit a discontinuity between at least two of the cells.
13. Component according to claim 12 , characterized in that the variations of the fill levels (h 1 . . . , h 5 ) are adapted so that the phase shifts respectively for the rays of visible light (R 1 . . . , R 5 ) passing through the cells along the direction perpendicular to the surface of the component have a root mean square deviation of less than one eighth of the wavelength (λ).
14. Component according to claim 12 , wherein the variations of the fill levels (h 1 . . . , h 5 ) are multiple of one same basic volume.
15. Method according to claim 14 , in which said basic volume is comprised between 0.1 and 50 picoliters.
16. Component according to claim 12 , further comprising a transparent film arranged on the cell set, and fixed onto separation walls situated between the cells in order to seal each cell.
17. Component according to claim 12 , comprising a lens.
18. Component according to claim 17 , comprising an ophthalmic spectacle lens.
19. Component according to claim 12 , comprising a substrate and a layered structure in which the cell set is formed, said layered structure being fixed on said substrate.