Patent · US Active

Ophthalmic lens having increased resistance to hot and humid environment

US11454743B2 · kind B2 · utility

0Cited by

1References

20Claims

0Family size

Assignees

CORPORATION DE L'ECOLE POLYTECHNIQUE DE MONTREAL · CA
Essilor International · FR

Inventors

Martin Caron · Montréal, CA
Karin Scherer · Charenton-le-Pont, FR
Oleg Zabeida · Montréal, CA
Ludvik Martinu · Longueuil, CA
Jolanta Klemberg-Sapieha · Rue du Bois des Loges, CA
Thomas Schmitt · Forchheim, DE

Key dates

Filing date	Aug 21, 2017
Grant date	Sep 27, 2022
Priority date	—
Expiry date	Sep 9, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG02B1/111
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The invention concerns an ophthalmic lens having an increased resistance to thermal and hygroscopic stresses, said ophthalmic lens comprising a substrate, at least one main face of which is coated with a siloxane-based anti-abrasion hardcoat, characterized in that said ophthalmic lens further comprises at least one protective layer of an organic-inorganic material directly in contact with said hardcoat, said protective layer of organic-inorganic material having a Young's modulus higher than 20 GPa, preferably of at least 25 GPa.

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