Optics: image projectors – Particular condenser
Reexamination Certificate
2007-04-24
2007-04-24
Koval, Melissa Jan (Department: 2851)
Optics: image projectors
Particular condenser
C353S030000, C359S649000
Reexamination Certificate
active
11019155
ABSTRACT:
A projection display device for enlarging and projecting an image includes a first lens group on the enlarging end of the projection display device, a plurality of display elements, each modulating a different one of a plurality of light beams with image information, an optical combiner for receiving from different directions different light beams modulated by different display elements, combining the modulated light beams, and directing the combined modulated light beams along an optical axis to the first lens group, and a plurality of second lens groups, each arranged on a separate optical axis so that a different one of the modulated light beams modulated by a different display element on the separate optical axis passes through one of the second lens groups before being incident on the optical combiner. The projection optical device satisfies certain conditions related to focal lengths and size of the display elements.
REFERENCES:
patent: H9-61711 (1997-03-01), None
patent: H10-268235 (1998-10-01), None
patent: 3175411 (2001-04-01), None
patent: 2001-154152 (2001-06-01), None
Arnold Bruce Y.
Arnold International
Fujinon Corporation
Henry Jon W.
Kong Andrew
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