Optical system for use in an image projector

Details Optical system for use in an image projector Optical system for use in an image projector

1999-06-21

2000-09-26

Dowling, William

Optics: image projectors

Polarizer or interference filter

353634, 353 31, G03B 2100

Patent

active

061234249

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.

REFERENCES:
patent: 5200857 (1993-04-01), Matsushita
patent: 5424868 (1995-06-01), Fielding et al.
patent: 5648870 (1997-07-01), Mitsutake
patent: 5890786 (1999-04-01), Kurematsu
patent: 5986814 (1999-11-01), Reinsch

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