Composite ophthalmic lens and method for obtaining same

US6709107B2 · kind B2 · utility

Assignee

• Essilor International (Compagnie Generale d'Optique) · FR

Inventors

• Peiqi Jiang · Dallas, US
• Stephane Cabeza · Tokyo, JP
• Gilbert Menduni · Charenton-le-Pont, FR

Key dates

• Filing date: Oct 29, 2001
• Grant date: Mar 23, 2004
• Expiry date: Oct 29, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The composite ophthalmic lens (1) comprises a first layer (2), at least 200 micrometers thick, forming a front part of said lens, of a first polymeric material of refractive index higher than or equal to 1.60 and having a front face (4) constituting a front optical surface S1, and a second layer (3), at least 200 micrometers thick, of a second polymeric material forming a rear part of said lens and having a rear face (6) constituting a rear optical surface S2, the interface (5) between these two layers constituting an optical surface S3 parallel to the rear optical surface S2.