Multifocal lens with a diffractive optical power region
US8317321B2 · kind B2 · utility
16Cited by
178References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2008 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Aug 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens system is presented having a diffractive optical power region. The diffractive optical power region has a plurality of concentric surface relief diffractive structures. A greater portion of light incident on a diffractive structure near the center point contributes to the optical power than light incident on a diffractive structure peripherally spaced therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.