Optical system having photoconductive members and optical means for decomposing and composing the polarized lights for a color picture display
US5130826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Apr 3, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/312
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed an optical system for a color picture display having three spatial light modulators of reflecting type corresponding to an optical image of one of three primary colors by photoelectric effect and photomodulation effect, a writing device for guiding writing lights each carrying the optical image of one of the colors to each device, a reading device for guiding reading lights each in the region of wavelength of one of the colors to each device and a composing device for composing a composed reading light of the reading lights which are emitted from the optical devices respectively after optically modulated. The optical system comprises an optical apparatus shared by the reading device and the composing device, having first, second and third prisms, a first dichroic filter provided between the first and the second prisms and a second dichroic filter provided between the second and the third prisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.