Optical system for use in an image projector
US6123424A · kind A · utility
10Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/283
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projector optical system has an illumination optical system, a dichroic surface, and a projection lens system. The dichroic surface is inclined with respect to the illumination principal ray traveling from the beam center of the illumination light emitted from the illumination optical system to the centers of the reflection-type display panels, and also with respect to the projection principal ray traveling from the centers of the reflection-type display panels to the center of the aperture stop of the projection lens system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.