Diffractive contact lens in relief

US5104212A · kind A · utility

Assignee

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

Inventors

• Jean Taboury · Sceaux, FR
• Pierre Chavel · Los Angeles, US
• Denis Joyeux · Les Ulis, FR
• Dominique Baude · Saint-Ouen, FR

Key dates

• Filing date: Nov 3, 1989
• Grant date: Apr 14, 1992
• Expiry date: Nov 3, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/20
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A diffractive contact lens in relief includes a smoothing layer (50) of optically transparent material having a smooth outside surface (51) and placed over the optical surface (16) in relief so as to immerse the relief.