Liquid crystal lenses having a Fresnel lens
US4904063A · kind A · utility
151Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal lens includes a liquid crystal cell formed by lens component members, at least one of the lens component members being formed of a Fresnel lens whose surface is formed by a number of annular ring-shaped Fresnel grooves with their crests leveled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.