Optical filtering device and application to a liquid crystal projector
US5946114A · kind A · utility
34Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1996 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Feb 16, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This optical filtering device includes a dichroic separator on the path of a light beam to be processed. According to the invention, it also includes a holographic filtering device situated in series with the separator on the path of the same beam. The holographic device can be oriented so as to adjust the angle of incidence of the beam and hence adjust its range of filtering wavelengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.