Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2007-06-19
2007-06-19
Phan, James (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S900000, C347S235000, C347S243000
Reexamination Certificate
active
11203297
ABSTRACT:
A multi-beam scanner includes light sources, a deflector deflecting the beams emitted from the light sources at an equiangular velocity, a scanning image-forming optical system guiding the deflected beams to a surface so as to be formed into light spots on the scanned surface, a light receiving device receiving the beams deflected toward optical write-in starting portions on the scanned surface as synchronizing beams, and a synchronizing beam optical system guiding the beams deflected toward the optical write-in starting portions on the scanned surface to the light receiving device. The scanning image-forming optical system includes two or more scanning positive lenses, with a region having a positive power in a main scanning direction on an optical write-in starting side, and each deflected beam received by the light receiving device passes through one or more but not all of the scanning positive lenses to be guided to the light receiving device. An optical path length from the deflector to the light receiving device is set larger than an optical path length from the deflector to the scanned surface in the synchronizing beam optical system.
REFERENCES:
patent: 5557448 (1996-09-01), Endo et al.
patent: 5570224 (1996-10-01), Endo et al.
patent: 5581392 (1996-12-01), Hayashi
patent: 5652670 (1997-07-01), Hayashi
patent: 5786594 (1998-07-01), Ito et al.
patent: 5875051 (1999-02-01), Suzuki et al.
patent: 5936756 (1999-08-01), Nakajima
patent: 5986791 (1999-11-01), Suzuki et al.
patent: 5999345 (1999-12-01), Nakajima et al.
patent: 6052211 (2000-04-01), Nakajima
patent: 6061162 (2000-05-01), Shiraishi et al.
patent: 6069724 (2000-05-01), Hayashi et al.
patent: 6081386 (2000-06-01), Hayashi et al.
patent: 6091534 (2000-07-01), Nakajima
patent: 6104522 (2000-08-01), Hayashi et al.
patent: 6141133 (2000-10-01), Suzuki et al.
patent: 6178029 (2001-01-01), Kamikubo
patent: 6185026 (2001-02-01), Hayashi et al.
patent: 6198562 (2001-03-01), Hayashi et al.
patent: 6222662 (2001-04-01), Suzuki et al.
patent: 6229638 (2001-05-01), Sakai et al.
patent: 6239860 (2001-05-01), Ito
patent: 6384949 (2002-05-01), Suzuki
patent: 6388792 (2002-05-01), Atsuumi et al.
patent: 6400917 (2002-06-01), Nakazato et al.
patent: 6417509 (2002-07-01), Atsuumi et al.
patent: 6429956 (2002-08-01), Itabashi
patent: 6445482 (2002-09-01), Hayashi
patent: 6448998 (2002-09-01), Suzuki et al.
patent: 6498617 (2002-12-01), Ishida et al.
patent: 6501585 (2002-12-01), Shiraishi et al.
patent: 6788446 (2004-09-01), Hayashi
patent: 6822666 (2004-11-01), Kato
patent: 03-221913 (1991-09-01), None
patent: 05-066650 (1993-03-01), None
patent: 9-76562 (1997-03-01), None
patent: 11-194285 (1999-07-01), None
patent: 2000-111820 (2000-04-01), None
patent: 2000-155277 (2000-06-01), None
patent: 2000-330050 (2000-11-01), None
Optical Scanning Apparatus U.S. Appl. No.: 10/053,272, Filed: Jan. 17, 2002, Inventor: Yoshinori Hayashi.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Phan James
Ricoh & Company, Ltd.
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