Optics: image projectors – Reflector – Plural
Reexamination Certificate
2005-10-04
2005-10-04
Mahoney, Christopher E (Department: 2851)
Optics: image projectors
Reflector
Plural
Reexamination Certificate
active
06951395
ABSTRACT:
A projection optical system which has a short projection distance and a compact structure, and allows oblique projection. The projection optical system projects luminous flux from an image forming element for forming an original image onto a projection surface which is oblique to a central principal ray which is a principal ray of luminous flux traveling from the center of the original image to the center of a finally formed image. The system includes a plurality of reflecting surfaces each having a curvature. In addition, the projection optical system satisfies a predetermined expression (1).
REFERENCES:
patent: 2510080 (1950-06-01), Cuneo
patent: 4348187 (1982-09-01), Dotsko
patent: 5825560 (1998-10-01), Ogura et al.
patent: 5847887 (1998-12-01), Ogura et al.
patent: 6021004 (2000-01-01), Sekita et al.
patent: 6166866 (2000-12-01), Sekita et al.
patent: 6292309 (2001-09-01), Sekita et al.
patent: 6366411 (2002-04-01), Kimura et al.
patent: 6626541 (2003-09-01), Sunaga
patent: 2002/0008853 (2002-01-01), Sunaga
patent: 2002/0057421 (2002-05-01), Kurematsu et al.
patent: 2002/0105734 (2002-08-01), Kimura et al.
patent: 2002/0149854 (2002-10-01), Tanaka et al.
patent: 1 139 145 (2001-10-01), None
patent: 5-80418 (1993-04-01), None
patent: 5-100312 (1993-04-01), None
patent: 2000-27307 (2000-01-01), None
patent: 2001-215412 (2001-08-01), None
patent: 2001-255462 (2001-09-01), None
European Search Report, dated Nov. 17, 2003, for EP 03 25 4526.
European Patent Office, Patent Abstracts of Japan for JP 2001-215412 (Aug. 10, 2001).
Chatani Sawako
Ishii Takayuki
Kurematsu Katsumi
Kurioka Yoshiaki
Sunaga Toshihiro
Mahoney Christopher E
Morgan & Finnegan , LLP
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