Fresnel lens for projection screen
US6407859B1 · kind B1 · utility
42Cited by
10References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1999 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jan 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is a screen, such as is used in back-lit projection screens, having a Fresnel lens laminated to another layer for support. The screen includes a Fresnel lens having an output surface, and a dispersing screen supportingly attached on a first side to the output surface of the Fresnel lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.