Methods for generating a progressive surface and for production of multifocal progressive lenses
US6786600B2 · kind B2 · utility
4Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2002 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | May 1, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/028
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for generating a progressive surface includes generating the surface from stored delta data and a substantially spherical surface calculated on-the-fly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.