Patent · US Active

Ophthalmic lens comprising a layer having a variable refractive index

US7837324B2 · kind B2 · utility

0Cited by

10References

19Claims

0Family size

Assignee

Essilor International (Compagnie Generale d'Optique) · FR

Inventors

Thierry Bonnin · Charenton-le-Pont, FR
Cecile Petignaud · Charenton-le-Pont, FR

Key dates

Filing date	Apr 18, 2006
Grant date	Nov 23, 2010
Priority date	—
Expiry date	May 4, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG02C2202/16
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

An ophthalmic lens (10) comprises an optical component (1) and a layer (2) placed on a face of the optical component (1a). The layer (2) has a variable refractive index and is structured so that a second order derivative of the index with regard to a linear spatial coordinate along the face of the optical component (1a) is greater than a fixed threshold. The layer (2) makes it possible to alter the optical power and astigmatism of the lens (10) with regard to corresponding values only relative to the optical component (1). In the event that the ophthalmic lens (10) is a progressive lens, the layer (2) makes it possible to change an addition, a length of progression and/or a design of the progressive lens.

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