High-efficiency illumination device and image projection apparat

Details High-efficiency illumination device and image projection apparat High-efficiency illumination device and image projection apparat

1995-06-01

1997-02-11

Dowling, William

Optics: image projectors

Polarizer or interference filter

353 38, G03B 2114

Patent

active

056013515

ABSTRACT:
An illumination device for supplying a beam of linearly polarized light having a non-rotationally symmetrical cross-section at the location of an object to be illuminated is described, which device comprises a light source, a reflector, an optical integrator (54, 82) for forming said beam cross-section and for realizing a uniform light distribution across the beam cross-section, and a polarizing system for converting the light supplied by the source into linearly polarized light. Since the polarizing system is arranged in the radiation path in front of the optical integrator, the device can be implemented with a small number of components and in a compact manner. The device may be used to great advantage in an image projection apparatus.

REFERENCES:
patent: 4127322 (1978-11-01), Jacobson et al.
patent: 4995702 (1991-02-01), Aruga
patent: 5115305 (1992-05-01), Baur et al.
patent: 5153752 (1992-10-01), Kurematsu et al.
patent: 5172254 (1992-12-01), Atarashi
patent: 5184248 (1993-02-01), de Vaan et al.
patent: 5278680 (1994-01-01), Karasawa et al.
patent: 5381278 (1995-01-01), Shingaki et al.
patent: 5387953 (1995-02-01), Minoura et al.
patent: 5446510 (1995-08-01), Mitsutake et al.
patent: 5461500 (1995-10-01), Tsuji et al.
"A Full-Color TFT-LCD With A Polymer-Dispersed Structure", by Yoshida et al, Japan Display '92, pp. 631-634.

Affiliated with

Also associated with

Rating

High-efficiency illumination device and image projection apparat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High-efficiency illumination device and image projection apparat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-efficiency illumination device and image projection apparat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-336880