Compact projector and method of using same

Details Compact projector and method of using same Compact projector and method of using same

1994-09-15

1996-04-23

Dowling, William C.

Optics: image projectors

Housing

353 38, 353 99, G03B 2128

Patent

active

055108610

ABSTRACT:
A compact projection illumination system includes a display controller, a condenser lens assembly including a light source, and a pair of finely faceted mirrors angularly disposed relative to one another to spread projection light emitted from the high intensity projection light source in two directions, and direct the reflected light to an image forming display device where an image is formed for projection purposes. The light is spread to illuminate precisely the light impinging surface of the image forming display device. To reduce image distortion caused by the faceted mirrors forming beam segments, the condenser lens assembly and the light source are arranged and constructed to permit the reflected beam segments to converge sufficiently to fill in dark or shadow areas between the beam segments prior to the segments impinging on the image forming display device, so that the resulting image is formed uniformly and substantially distortion free in a narrowly defined, compact space.

REFERENCES:
patent: 4737896 (1988-04-01), Mochizuki et al.
patent: 5296882 (1994-03-01), Nelson et al.
patent: 5379080 (1995-01-01), Ouozuka
patent: 5396350 (1995-03-01), Beeson et al.

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