Optical Device with a Functionalised Coating and Method for Such Optical Device

Patent metadata

Field	Value
Publication number	US-2016266290-A1
Application number	US-201615066610-A
Country	US
Kind code	A1
Filing date	Mar 10, 2016
Priority date	Mar 11, 2015
Publication date	Sep 15, 2016
Grant date	—

Abstract

The invention pertains to an optical device comprising a substrate with two main faces, and, on at least one face, a first coating which is in contact with a second coating, the first coating being positioned between the second coating and the substrate, the first coating is a release layer, adapted so that it can be selectively activated in order to diminish mechanical properties or adhesion enabling the second coating to be fastened to the substrate.

First claim

1 . An optical device comprising a substrate with two main faces, a first coating on at least one face, and a second coating in contact with the first coating, wherein the first coating is a release layer that can be selectively activated to diminish mechanical properties or adhesion enabling the second coating to be fastened to the substrate.

2 . The optical device according to claim 1 , wherein the release layer is a material that degrades upon activation.

3 . The optical device according to claim 2 , wherein the material of the release layer has a degradation activated by a chemical, by irradiation, or temperature under 80° C.

4 . The optical device according to claim 3 , wherein the release layer is a glue or resin.

5 . The optical device according to claim 4 , wherein the release layer is a glue that is dissolved using a solvent.

6 . The optical device according to claim 1 , wherein the release layer is a material that is adapted to absorb external compounds, thereby forcing release of the second coating.

7 . The optical device according to claim 6 , wherein the release layer is a hydrophilic material adapted to incorporate aqueous liquids at the interface between the release layer with the substrate and/or the second coating.

8 . The optical device according to claim 7 , wherein the release layer is a 2-[methoxy(polyéthylene-oxy)propyl]trimethoxysilane of formula CH 3 O—(CH 2 CH 2 0) y (CH 2 ) 3 Si—(OCH 3 ) 3 with y comprised between 6 and 9 included.

9 . The optical device according to claim 1 , wherein the second coating is an interferential optical filter coating.

10 . The optical device according to claim 9 , wherein the second coating comprises at least a nanometre-scale SiO 2 layer or a nanometre scale ZrO 2 layer.

11 . The optical device according to claim 1 , wherein the optical device is an ophthalmic lens.

12 . A process of releasing a second coating on an optical device, the process comprising:
a) Providing the optical device of claim 1 ; and b) Activating the release layer.

13 . The process of claim 12 , further comprising cleaning the optical device.

14 . The process according to claim 12 , wherein the release layer is a hydrophilic material adapted to incorporate aqueous liquids at the interface between the release layer with the substrate and/or the second coating, and wherein activating a release layer comprises immersing the optical device into a water bath or wiping the optical device using water.

15 . A process for manufacturing an optical device comprising the steps of providing a substrate with two main faces, providing a second coating onto at least one face of the substrate, and providing a release layer in-between the substrate and the second coating.

16 . The process according to claim 15 , wherein the release layer is a SiPeO layer deposited during a spraying step or a vacuum deposition step.

17 . The process according to claim 15 , wherein the second coating is an interferential optical filter coating, such as an antireflective stack, deposited during a vacuum deposition step.

18 . The process according to claim 17 , wherein the second coating is an antireflective stack.

Assignees

• Essilor Int

Inventors

• Hervieu Gregory

Classifications

• G02C7/107

  Interference colour filters · CPC title

• G02B1/10

  Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence) · CPC title

• G02B1/111

  using layers comprising organic materials · CPC title

• G02C7/024

  Methods of designing ophthalmic lenses · CPC title

• G02B1/113 Primary

  using inorganic layer materials only · CPC title