Optics: image projectors – Polarizer or interference filter
Reexamination Certificate
2007-01-02
2007-01-02
Koval, Melissa J (Department: 2851)
Optics: image projectors
Polarizer or interference filter
C353S031000, C353S102000
Reexamination Certificate
active
10500571
ABSTRACT:
A projector having a cross-dichroic prism (260) synthesizing three kinds of red, green, and blue light emitted from liquid crystal panels (250, 252, 254); and a projection lens (270) projecting the synthesized light and also having polarizing plates (251, 253, 255) disposed on the optical paths between the corresponding liquid crystal panels (250, 252, 254) and the cross-dichroic prism (260) includes a lens element (256), serving as an optical element for compensating chromatic aberration of magnification, which is formed on and integrally with one surface of the polarizing plate (251) disposed on the light path of the red light and which adjusts the size of the projected image screen of the red light extending along at least a predetermined direction so as to be nearly equal to those of the projected image screens of the other kinds of color light extending along the predetermined direction.
REFERENCES:
patent: 6229646 (2001-05-01), Mitsutake et al.
patent: 6592224 (2003-07-01), Ito et al.
patent: 6811262 (2004-11-01), Takezawa et al.
patent: 6942347 (2005-09-01), Sugawara et al.
patent: 2002/0036815 (2002-03-01), Fujimori
patent: 2002/0060780 (2002-05-01), Takezawa et al.
patent: 2002/0131144 (2002-09-01), Fujimori
patent: 2005/0213057 (2005-09-01), Nakayama
patent: 2006/0072209 (2006-04-01), Karasawa et al.
patent: A 3-78718 (1991-04-01), None
patent: A 11-38210 (1999-02-01), None
patent: A 2000-89364 (2000-03-01), None
patent: A 2000-155372 (2000-06-01), None
patent: A 2000-206450 (2000-07-01), None
patent: A 2002-6298 (2002-01-01), None
patent: A 2002-202489 (2002-07-01), None
patent: A 2002-214704 (2002-07-01), None
patent: A 2003-233124 (2003-08-01), None
Kawai Fumie
Narimatsu Shuji
Nishida Kazuhiro
Koval Melissa J
Oliff & Berridg,e PLC
Seiko Epson Corporation
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