Optics: image projectors – Reflector – Plural
Reexamination Certificate
2008-09-19
2009-12-29
Koval, Melissa J (Department: 2862)
Optics: image projectors
Reflector
Plural
C353S030000, C353S097000, C353S102000, C359S449000, C359S649000, C359S850000, C362S297000, C362S299000, C362S308000
Reexamination Certificate
active
07637621
ABSTRACT:
A projection optical system for use in an image projection apparatus illuminating an image display panel forming an image in accordance with a modulating signal with illumination light from a light source. The projection optical system includes first and second optical systems arranged along an optical path defining an upstream-downstream direction in the order described from upstream to downstream on the downstream side of the image display panel. The first optical system includes at least one dioptric system and has positive power. The second optical system includes at least one reflecting surface having power and has positive power. The image formed by the image display panel is formed as an intermediate image in the optical path, and the intermediate image is magnified and projected.
REFERENCES:
patent: 2510080 (1950-06-01), Cuneo
patent: 3930723 (1976-01-01), Holt
patent: 6513935 (2003-02-01), Ogawa
patent: 6631994 (2003-10-01), Suzuki et al.
patent: 6771427 (2004-08-01), Matsuo
patent: 6873476 (2005-03-01), Shafer
patent: 7048388 (2006-05-01), Takaura et al.
patent: 7085075 (2006-08-01), Mann et al.
patent: 2001/0048558 (2001-12-01), Lin
patent: 2004/0119946 (2004-06-01), Rudolph et al.
patent: 2004/0160666 (2004-08-01), Hudyma
patent: 2008/0304019 (2008-12-01), Takaura et al.
patent: 2009/0015801 (2009-01-01), Takaura et al.
patent: 2009/0015910 (2009-01-01), Takaura et al.
patent: 04-107521 (1992-04-01), None
patent: 6-91641 (1994-11-01), None
patent: 07-013157 (1995-01-01), None
patent: 2001-264627 (2001-09-01), None
patent: 2001-324675 (2001-11-01), None
patent: 2002-6398 (2002-01-01), None
patent: 2002-40326 (2002-02-01), None
patent: 2002-57963 (2002-02-01), None
patent: 2002-174853 (2002-06-01), None
patent: 2002-296503 (2002-10-01), None
patent: 2003-75767 (2003-03-01), None
patent: 2004-61959 (2004-02-01), None
patent: 2004-61960 (2004-02-01), None
patent: 2004-61961 (2004-02-01), None
Fujita Kazuhiro
Sakuma Nobuo
Takaura Atsushi
Koval Melissa J
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh & Company, Ltd.
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