Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1995-10-10
1996-07-30
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 40, 359 70, G02F 11335
Patent
active
055417469
ABSTRACT:
A light source device for use in liquid crystal projectors which comprises a reflector oriented toward a liquid crystal panel and having a reflecting surface formed by a paraboloid or ellipsoid, and a light source disposed at the focal position of the reflector. A converter is disposed on an optical axis extending from the light source to the liquid crystal panel for converging light emanating from the light source and reflected from the reflector in accordance with the size of an image display portion of the panel. The reflecting surface of the reflector has a great focal distance so that the spreading angle of the reflected light is not greater than 8 deg.
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patent: 4735495 (1988-04-01), Henkes
patent: 5121137 (1992-06-01), Taki et al.
patent: 5142387 (1992-08-01), Shimaka et al.
patent: 5150138 (1992-09-01), Nakanishi et al.
patent: 5159478 (1992-10-01), Akiyama et al.
Izumitani et al., Machine Designing, vol. 30, No. 4 (Apr. 1986), pp. 42-50 "Designing and application of a spherical glass lens for the use of optical disc and camera".
Amano Ryuhei
Hamagishi Goro
Kanayama Hideyuki
Yamauchi Kenji
Miller Charles
Sanyo Electric Co,. Ltd.
Sikes William L.
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