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:
Apr. 06, 2010
Filed:
Jun. 28, 2006
Frédéric Arrouy, Charenton, FR;
Olivier Beinat, Charenton, FR;
Luc Nouvelot, Charenton, FR;
Michèle Thomas, Charenton, FR;
Frédéric Arrouy, Charenton, FR;
Olivier Beinat, Charenton, FR;
Luc Nouvelot, Charenton, FR;
Michèle Thomas, Charenton, FR;
Essilor International Compagnie Generale d'Optique, Charenton-le-Pont, FR;
Abstract
The present invention relates to an optical article having anti-reflection properties and high thermal resistance, comprising a substrate having at least one main face coated with a multi-layer anti-reflection coating comprising a stack of at least one high refractive index layer and at least one low refractive index layer, wherein the ratio: is higher than 2.1. If the anti-reflection stack comprises at least one low refractive index layer having a physical thickness ≧100 nm which is not the outermost layer of the anti-reflection coating, said relatively thick layer and the underlying layers are not taken into account in Rcalculation.