Determining method for an ophthalmic lens with targeted transmission spectrum

Patent metadata

Field	Value
Publication number	US-12138872-B2
Application number	US-201916982957-A
Country	US
Kind code	B2
Filing date	Jun 3, 2019
Priority date	Jun 8, 2018
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

Disclosed is a method of manufacturing an ophthalmic lens having at least one optical function, including the determination of a transmission spectrum in a wavelength range from 280 to 2000 nm, the determination of a matrix including at least two compounds absorbing light having a wavelength from 280 to 2000 nm, with regard to the determined transmission spectrum, and additively manufacturing the matrix.

First claim

The invention claimed is:

1. A method of manufacturing an ophthalmic lens having at least one filtering function, the method comprising:
determining a transmission spectrum in a wavelength range from 280 to 2000 nm;
determining a matrix comprising, in separated layers or voxels, a first compound and a second compound absorbing light having a wavelength from 280 to 2000 nm, with regard to the determined transmission spectrum; and
additively manufacturing said matrix by depositing a plurality of predetermined volume elements of said compounds on a predetermined build support,
wherein the first and second compounds comprise compounds that are chosen among :
(i) a first initiator of polymerization comprised in the first compound and a second initiator comprised in the second compound, the second compound comprising an additive, said additive being chemically sensitive to said first initiator,
(ii) an organic cationic dye comprised in the first compound and an organic anionic dye comprised in the second compound additive,
(iii) a transition metallic complex used as a visible or near-infrared dye in the first compound and a monomer in the second compound, the transition metallic complex containing metallic species configured to speed up free radical polymerization of said monomer, and
(iv) a photochromic light management additive comprised in the first compound and a polymer comprised in the second compound, the polymer comprised in the second compound having a reticulation level preventing said photochromic light management additive from spatially rearranging when the photochromic light management additive is dispersed inside said polymer.

2. The method according to claim 1 , wherein said matrix comprises at least one among a plurality of layers and a plurality of voxels.

3. The method according to claim 1 , wherein the matrix defines a three-dimensional axis system comprising:
first and second surface axes defining a surface of the build support, and
a thickness axis defining the thickness of the matrix,
wherein said determining the matrix comprises selectively determining the position of each of the volume elements in the matrix depending on the first and second surface axes and the thickness axis.

4. The method according to claim 3 , wherein the thickness axis is perpendicular to a surface of the build support onto which said compounds are deposited.

5. The method according to claim 3 , wherein the volume elements are distributed in the matrix so that the amount of at least one of said at least two compounds varies in the matrix along at least one of the first and second surface axes and the thickness axis.

6. The method according to claim 1 , wherein said at least two compounds comprise at least one dye.

7. The method according to claim 1 , wherein the matrix is determined such that a barrier is formed between two consecutive layers or voxels comprising incompatible compounds.

8. The method according to claim 7 , wherein the barrier is formed by one of:
at least one transitional layer of compound separating two consecutive layers comprising incompatible compounds, and
at least one transitional voxel disposed between two consecutive voxels comprising incompatible compounds.

9. The method according to claim 1 , wherein the build support is an optical substrate.

10. The method according to claim 1 , further comprising assembling said matrix to an optical substrate to obtain the ophthalmic lens.

11. The method according to claim 1 , wherein the additively manufacturing to manufacture said matrix comprises one of polymer jetting and stereolithography.

12. The method according to claim 2 , further comprising polishing the matrix,
wherein said matrix is one or more of: (i) determined to be oversized along the thickness axis (ii) determined to comprise a peripheral layer having a transmission higher than a transmission of a matrix area located between said peripheral layer and the build support.

13. The method according to claim 1 , wherein the determining said transmission spectrum and the determining said matrix form a computer-implemented method, the determining said matrix comprising:
providing a database comprising a plurality of compounds,
allocating a label to each compound in the database, and
selecting said at least two compounds in the database depending on said allocated labels and the position of volume elements of said at least compounds so that said matrix has the determined transmission spectrum.

14. An ophthalmic lens having at least one optical function, the ophthalmic lens being obtained by the manufacturing method according to claim 1 , the ophthalmic lens comprising:
an optical substrate;
the determined matrix onto a surface of the optical substrate, said determined matrix providing the spectrum transmission in the wavelength range from 280 to 2000 nm to the ophthalmic lens, said matrix comprising the at least two compounds absorbing light having a wavelength from 280 to 2000 nm,
wherein said determined matrix is obtained by additive manufacturing by depositing the plurality of predetermined volume elements of said compounds on the predetermined build support.

15. The method according to claim 2 , wherein the matrix defines a three-dimensional axis system comprising:
first and second surface axes defining a surface of the build support, and
a thickness axis defining the thickness of the matrix,
wherein said determining the matrix comprises selectively determining the position of each of the volume elements in the matrix depending on the first and second surface axes and the thickness axis.

16. The method according to claim 4 , wherein the volume elements are distributed in the matrix so that the amount of at least one of said at least two compounds varies in the matrix along at least one of the first and second surface axes and the thickness axis.

17. The method according to claim 2 , wherein said at least two compounds comprise at least one dye.

18. The method according to claim 3 , wherein said at least two compounds comprise at least one dye.

19. The method according to claim 4 , wherein said at least two compounds comprise at least one dye.

Assignees

• Essilor Int

Inventors

• Feuillade Mathieu
• Fromentin Pierre
• Hervieu Gregory
• Montoya David
• Jallouli Aref

Classifications

• G02C7/10 Primary

  Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses · CPC title

• B29D11/00653

  photochromic · CPC title

• B29C64/129

  characterised by the energy source therefor, e.g. by global irradiation combined with a mask · CPC title

• B29C64/393

  for controlling or regulating additive manufacturing processes · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title