Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-05-20
1996-08-13
Epps, Georgia Y.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 10, 359 19, G02B 532, G03H 110
Patent
active
055462006
ABSTRACT:
This invention concerns chromatic light separators, and is particularly intended to reduce their dimensions. A chromatic separator in accordance with the invention contains at least two selective wave length mirrors. According to one characteristic of the invention, the two selective mirrors are nested holographic mirrors. The invention is particularly suitable for three-color rear-projection type picture projectors using liquid crystal screens.
REFERENCES:
patent: 4850685 (1989-07-01), Kamakura et al.
patent: 4938550 (1990-07-01), Inagaki et al.
patent: 5011284 (1991-04-01), Tedesco et al.
patent: 5198928 (1993-03-01), Chauvin
patent: 5223956 (1993-06-01), Kramer et al.
Y. Fumio, et al., Patent Abstracts of Japan, vol. 13, No. 375 (P-921), Aug. 1989. JP 1129205, "Hologram Deflector".
Y. Takahashi, Patent Abstracts of Japan, vol. 14, No. 27 (P-922) (3970), Jan. 19, 1990. JP 1-267612, "Projection Type Display Device".
Huignard Jean-Pierre
Joubert Cecile
Loiseaux Brigitte
Nicolas Christophe
"Thomson-CSF"
Epps Georgia Y.
Papalas Michael A.
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