Patent · US Active

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

US12135407B2 · kind B2 · utility

0Cited by

3References

23Claims

0Family size

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	Nov 5, 2024
Priority date	—
Expiry date	Jul 22, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/022
WIPO fieldOptics
WIPO sectorInstruments

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 50 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 reflection performance on at least one main face is improved in scotopic conditions, fornear infrared light or for a wide range of angles of incidence.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.