Stacked LCD color projector with equal path lengths

Details Stacked LCD color projector with equal path lengths Stacked LCD color projector with equal path lengths

1991-09-20

1993-02-02

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 40, 359 71, G02F 113

Patent

active

051842343

ABSTRACT:
Display apparatus for forming an image from a plurality of image modulators located at different distances from an image surface includes illumination means for forming an illumination beam, a plurality of image forming modulators disposed at different distances from the image surface, for forming a composite image on the image surface, path length correcting means disposed between the plurality of image forming modulators and the image surface, for equalizing the optical path lengths between the image forming modulators and the image surface, so that the composite image can be focused.

REFERENCES:
patent: 4448823 (1984-05-01), Clifford
patent: 4690526 (1987-09-01), Ledebuhr
patent: 4786146 (1988-11-01), Ledebuhr
patent: 4904061 (1990-02-01), Aruga
patent: 5022750 (1991-06-01), Flasck
patent: 5075798 (1991-12-01), Sonehara et al.

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