Method for determining an ophthalmic lens comprising an aspherical continuous layer on one of its faces and an aspherical Fresnel layer on one of its faces
US10254563B2 · kind B2 · utility
1Cited by
1References
7Claims
0Family size
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Key dates
| Filing date | Oct 17, 2013 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | Jan 3, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Method for defining one face of an ophthalmic lens, having a surface formed by superposing a Fresnel layer and a continuous surface referred to as the “carrier”. Also disclosed is an ophthalmic lens comprising such a face. The method allows a Fresnel layer to be defined that compensates for geometric effects induced by a variation in the curvature of the carrier on the light incident on the face of an ophthalmic lens. This method is particularly useful when the curvature of the face of the ophthalmic lens is adapted to facilitate fitting it into a spectacle frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.