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:
Dec. 29, 2020
Filed:
May. 04, 2017
Essilor International, Charenton-le-Pont, FR;
Xingzhao Ding, Singapore, SG;
ESSILOR INTERNATIONAL, Charenton-le-Pont, FR;
Abstract
This invention relates to an ophthalmic lens comprising 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 antireflective coating, characterized in that the number of layers of said antireflective coating is higher than or equal to 5, and the antireflective coating comprises: —at least one layer having a low refractive index which is <1.6, defined as 'LI layer', —at least one layer having a very high refractive index which is ≥2.2, defined as 'VHI layer' and —at least one layer having a high refractive index which is ≥1.6 and <2.2, defined as “HI layer”, the HI layer being the layer which is the nearest from said substrate amongst said LI, HI and VHI layers, and such that the mean reflection factor in the near infrared (NIR) region Rof said antireflective coating is higher than or equal to 40% at an angle of incidence lower than 35°.