Invention Grant
- Patent Title: Ophthalmic lens comprising a thin antireflective coating with a very low reflection in the visible region
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Application No.: US15421676Application Date: 2017-02-01
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Publication No.: US10527760B2Publication Date: 2020-01-07
- Inventor: Hélène Maury , Dominique Conte , Xingzhao Ding
- Applicant: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
- Applicant Address: FR Charenton-le-Pont
- Assignee: Essilor International
- Current Assignee: Essilor International
- Current Assignee Address: FR Charenton-le-Pont
- Agency: Norton Rose Fulbright US LLP
- Priority: EP16305127 20160204
- Main IPC: G02B1/116
- IPC: G02B1/116 ; G02B1/115 ; G02C7/02 ; G02B1/16 ; G02B1/14

Abstract:
This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack composed of at least: (i) a wetting layer; (ii) a metal layer, wherein the metal is selected from silver, gold or copper or mixtures thereof; (iii) a protective layer which is able to avoid oxidation of said metal layer, characterized in that wetting layer (i) is in direct contact with metal layer (ii), with the proviso that said multilayered antireflective coating does not comprise silicon nitride and wherein (ii) the metal layer has a physical thickness equal to or higher than 6 nm.
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