Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-10-30
1994-01-11
Hille, Rolf
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 63, 359 70, 353 81, 353 98, 358 60, G02F 113
Patent
active
052786803
ABSTRACT:
A projection type liquid crystal display (LCD) system having a light source, a light separation device for separating light from the light source into color components, a liquid crystal light valve for modulating light from the light separation device, a light synthesizing device for synthesizing the modulated light from the liquid crystal light valve, and a projection lens for projecting light from the light synthesizing device. A polarizing beam splitter is arranged in the optical path between the light source and the light separation device to separate the incident light into two polarized light components having perpendicular polarization directions relative to each other and a polarizing conversion device converts the separated polarized light components to have the same polarization direction and transmits them from the conversion device in spatial parallel relation to the liquid crystal light valve.
REFERENCES:
patent: 4989076 (1991-01-01), Owada et al.
patent: 5028121 (1991-07-01), Baur et al.
patent: 5172254 (1992-12-01), Atarashi et al.
Karasawa Johji
Shinozaki Junichirou
Carothers, Jr. W. Douglas
Hille Rolf
Seiko Epson Corporation
Tran Minhloan
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