Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2007-10-23
2009-06-09
Phan, James (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C347S243000
Reexamination Certificate
active
07545547
ABSTRACT:
A scanning optical system leads the light fluxes deflected by the polygon mirror to a photosensitive drum. An absolute value of a lateral magnification in a main scanning direction is larger than an absolute value of a lateral magnification in a sub-scanning direction. Moreover, a beam diameter in the sub-scanning direction on a surface of the photosensitive drum is equal to or smaller than a beam diameter in the main scanning direction and larger than a scan line interval.
REFERENCES:
patent: 6104522 (2000-08-01), Hayashi et al.
patent: 6977762 (2005-12-01), Hayashi
patent: 7050210 (2006-05-01), Atsuumi et al.
patent: 7106483 (2006-09-01), Hayashi et al.
patent: 7145705 (2006-12-01), Hayashi
patent: 7154651 (2006-12-01), Atsuumi et al.
patent: 7164516 (2007-01-01), Hayashi et al.
patent: 7218432 (2007-05-01), Ichii et al.
patent: 7233425 (2007-06-01), Hayashi
patent: 7236281 (2007-06-01), Hayashi et al.
patent: 7253937 (2007-08-01), Ueda et al.
patent: 7271823 (2007-09-01), Izumi et al.
patent: 2006/0000990 (2006-01-01), Hayashi et al.
patent: 2006/0077500 (2006-04-01), Hayashi et al.
patent: 2006/0232659 (2006-10-01), Hayashi et al.
patent: 2006/0284968 (2006-12-01), Hayashi et al.
patent: 2007/0081217 (2007-04-01), Hayashi et al.
patent: 2007/0206261 (2007-09-01), Hayashi et al.
patent: 2007/0211325 (2007-09-01), Ichii
patent: 2007/0253048 (2007-11-01), Sakai et al.
patent: 10-301044 (1998-11-01), None
patent: 2004-287292 (2004-10-01), None
patent: 2005-250319 (2005-09-01), None
U.S. Appl. No. 11/782,268, filed Jul. 27, 2007, Ichii, et al.
U.S. Appl. No. 11/844,643, filed Aug. 24, 2007, Saisho, et al.
U.S. Appl. No. 11/873,635, filed Oct. 17, 2007, Hayashi, et al.
U.S. Appl. No. 11/877,020, filed Oct. 23, 2007, Hayashi, et al.
U.S. Appl. No. 12/186,808, filed Aug. 6, 2008, Watanabe, et al.
U.S. Appl. No. 12/190,182, filed Aug. 12, 2008, Ichii et al.
Hayashi Yoshinori
Ichii Daisuke
Kubo Nobuaki
Watanabe Naoto
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Phan James
Ricoh & Company, Ltd.
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