Optics: image projectors – Composite projected image – Multicolor picture
Patent
1995-10-26
1996-11-26
Dowling, William
Optics: image projectors
Composite projected image
Multicolor picture
353 34, 359 48, 359 72, G03B 2128
Patent
active
055778267
ABSTRACT:
To effectively utilize a luminous flux from a light source thereby realizing a reflecting type color image projecting apparatus having a high brightness. The apparatus includes three sheets of reflecting type optical writing liquid crystal light valves, means for writing images of respective color components to the respective reflecting type optical writing liquid crystal light valves, a polarized beam splitter for splitting a light source luminous flux into polarized light illuminating luminous fluxes, means for separating only a green component of one of the polarized light illuminating luminous fluxes, means for separating the other one of the polarized light illuminating luminous fluxes into a red component and a blue component and a projecting lens. A back focus from the projecting lens to the reflecting type optical writing liquid crystal light valves can be shortened and utilization efficiency of a luminous flux from a light emitting source can more be enhanced than a conventional reflecting type color image projecting apparatus.
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Funanami Yukiya
Iwaki Tadao
Kasama Nobuyuki
Mitsuoka Yasuyuki
Dowling William
Seiko Instruments Inc.
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