Optics: image projectors – Prism in light path
Reexamination Certificate
2007-09-11
2007-09-11
Dowling, William C. (Department: 2851)
Optics: image projectors
Prism in light path
C353S033000, C359S834000
Reexamination Certificate
active
10905558
ABSTRACT:
A projection system includes a light source, a beam splitter module, a projection lens, and an optical combiner module includes at least one light valve for forming the image. A light beam emitted from the light source is split by the beam splitter module into three color lights and such three color lights are thereafter combined by the optical combiner module. The optical combiner module comprises a combiner and a plurality of prisms disposed adjacent to the combiner. The combiner comprises at least a pared-corner, and one side of at least one prism is leant adjacent to the pared-corner of the combiner so as to minimize the size of the optical combiner module and shorten the back focal length between the light valve and the projection lens. In addition, the projection quality of the digital light projection system is not easy to be influenced by heat temperature.
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DELTA Electronics, Inc.
Dowling William C.
Jianq Chyun IP Office
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