Optical lens having an interferential coating and a multilayer system for improving abrasion-resistance

US12111521B2 · kind B2 · utility

Assignee

• Essilor International · FR

Inventors

• Christophe Valenti · Charenton-le-Pont, FR
• Frédéric Guillain · Charenton-le-Pont, FR
• William TROTTIER-LAPOINTE · Charenton-le-Pont, FR
• Xingzhao DING · Singapore, SG

Key dates

• Filing date: Nov 18, 2019
• Grant date: Oct 8, 2024
• Expiry date: Jun 14, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/116
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to an optical lens comprising a substrate having a front main face and a rear main face, at least one main face of which being successively coated with a first high refractive index sheet which does not comprise any Ta2O5 layer, a second low refractive index sheet a third high refractive index sheet, a monolayer sub-layer having a thickness higher than or equal to 100 nm, and a multilayer interferential coating comprising a stack of at least one high refractive index layer and at least one low refractive index layer. The mean reflection factor RUV on said rear main face between 280 nm and 380 nm, weighted by the function W(λ) defined in the ISO 13666:1998 standard, is lower than 10%, for an angle of incidence of 35°.