The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 2021
Filed:
Aug. 09, 2017
Essilor International, Charenton-le-Pont, FR;
Xingzhao Ding, Singapore, SG;
ESSILOR INTERNATIONAL, Charenton-le-Pont, FR;
Abstract
This invention relates to an optical article 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 an interferential coating, characterized in that said interferential coating comprises a stack comprising: —at least one layer having a low refractive index which is <1.6, called 'LI layer', —at least one HI/VHI/HI triplet of three layers composed of one layer: •having a very high refractive index which is ≥2.1, called 'VHI layer', •surrounded on both sides by two layers having a high refractive index which is ≥1.6, called “HI layers”, and such that the mean reflectance in ultra violet (UV) region Rof said interferential coating is lower than or equal to 10% at an angle of incidence comprised between 30° and 45°.