Method for manufacturing an ophthalmic lens and said lens

Patent metadata

Field	Value
Publication number	US-10162195-B2
Application number	US-201515312840-A
Country	US
Kind code	B2
Filing date	May 20, 2015
Priority date	May 21, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

The method for manufacturing relates to an ophthalmic lens comprising a substrate and a functional film securely fastened to a curved face of said substrate. This method comprises a method for gluing the functional film, which is initially flat, to said curved face. The interferential and organic filtering film selected as said functional film filters a preset band of wavelengths and the gluing method is carried out so that the maximum of the degree of major deformation experienced by the film on a surface is lower than 3%. In the ophthalmic lens, the wavelength at which maximum filtration is observed at the center of the lens and the wavelength at which maximum filtration is observed at the periphery of the useful area of the lens differ by a less than 5%.

First claim

The invention claimed is:

1. A method for manufacturing an ophthalmic lens comprising a substrate and a functional film securely fastened to a curved face (S 1 ) of said substrate, comprising:
obtaining the substrate comprising a curved face;
obtaining the functional film, further defined as an interferential and organic filtering film; and
gluing the functional film to the curved face in a manner such that a maximum degree of major deformation experienced by the film on a surface is less than 3%;

wherein the functional film when securely fastened to the curved face is configured to filter a preset band of wavelengths.

2. The method of claim 1 , wherein said functional film comprises a three-dimensional order or a one-dimensional order.

3. The method of claim 2 , wherein the functional film comprises a three-dimensional order with an organic layer formed by photonic crystals.

4. The method of claim 2 , wherein the functional film comprises a one-dimensional order with a multilayer or a plurality of organic films.

5. The method of claim 1 , wherein said functional film at least partially filters light having a wavelength comprised between 400 nm and 460 nm.

6. The method of claim 5 , wherein the functional film at least partially filters light having a wavelength comprised between 415 nm and 450 nm.

7. The method of claim 1 , wherein said functional film filters at least 20% of light of wavelength comprised between 400 nm and 460 nm.

8. The method of claim 1 , wherein the maximum of the degree of major deformation experienced by the film on a surface (S 0 ) is lower than 3%.

9. The method of claim 1 , wherein the maximum of the degree of major deformation experienced by the film on a surface (S 0 ) is higher than 1%.

10. The method of claim 1 , wherein the gluing method comprises steps of:
i) preforming said functional film to give it a curvature;
ii) bringing the centre of the convex face of said functional film into contact with the centre of the curved face (S 1 ) of said substrate; and
iii) then applying said functional film in order to diffuse radially from the centre of the film as far as its periphery the conformal contact between said film and said substrate.

11. The method of claim 10 , wherein said steps i), ii) and iii) are implemented with said functional film, which forms part of a stratified structure comprising an auxiliary membrane and a binding layer between said functional film and said auxiliary membrane, only said auxiliary membrane being immobilized peripherally.

12. An ophthalmic lens comprising a substrate and a functional film securely fastened to a curved face (S 1 ) of said substrate, said functional film being configured to filter a preset band of wavelengths in its initially flat state, wherein the wavelengths at which maximum filtration is observed at the centre of the lens and the wavelengths at which maximum filtration is observed at the periphery of the useful area of the lens differ by less than 5%.

13. The ophthalmic lens of claim 12 , wherein the wavelengths at which said maxima are observed are each comprised between 400 nm and 460 nm.

14. The ophthalmic lens of claim 12 , wherein each of said maximum filtrations is higher than 20%.

Assignees

• Essilor Int
• Essilor Int

Inventors

• Marck Christelle

Classifications

• G02C7/107 Primary

  Interference colour filters · CPC title

• G02B1/005

  made of photonic crystals or photonic band gap materials (photonic band-gap structures or photonic lattices in integrated optics G02B6/1225; photonic band-gap structures or photonic lattices in optical fibres G02B6/02295) · CPC title

• G02C2202/16

  Laminated or compound lenses · CPC title

• B29D11/0073

  Optical laminates · CPC title

• B29D11/00009

  Production of simple or compound lenses · CPC title