Method for designing a spectacle lens and spectacle lens
US9176329B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2013 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Jun 24, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a spectacle lens comprising a first lens element and a second lens element, the first lens element having a front surface and a back surface that comprises a first back surface region and a second back surface region, the at least one second lens element comprising a front surface and a back surface, the second back surface region of the first lens element and the front surface of the second lens element being contiguous, a front surface of the spectacle lens being formed by the front surface of the first lens element and a back surface of the spectacle lens being formed in a base region by the first back surface region of the first lens element and in an achromatic region by the back surface of the at least one second lens element, the first back surface region of the first lens element having a first tangent at at least one first transition point between the base region and the achromatic region in a first cross-sectional plane of the spectacle lens, the back surface of the at least one second element having a second tangent at the at least one first transition point in the cross-sectional plane, wherein the first tangent and the second tangent in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.