Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2008-01-01
2008-01-01
Phan, James (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S207110, C347S259000
Reexamination Certificate
active
07315409
ABSTRACT:
An optical scanning device deflects, by a common optical deflecting part, a plurality of groups of light beams emitted from a plurality of light sources and directs, by a scanning and imaging optical system, the groups of deflected light beams to respective scan surfaces so as to optically scan the scan surfaces. Each of the groups of light beams deflected by the optical deflecting part passes through at least two scanning lenses while being directed to a corresponding one of the scan surfaces. A first scanning lens arranged nearest to the optical deflecting part among the scanning lenses transmits the groups of light beams directed to the respective scan surfaces and satisfies Pm>0≧Ps, where Pm is a power in a main scanning direction and Ps is a power in a sub-scanning direction. A second scanning lens arranged nearest to the corresponding scan surface among the scanning lenses possesses a positive power in the sub-scanning direction and transmits only the group of light beams directed to the corresponding scan surface.
REFERENCES:
patent: 5734489 (1998-03-01), Shiraishi et al.
patent: 5784094 (1998-07-01), Ota et al.
patent: 6028688 (2000-02-01), Iizuka
patent: 6100912 (2000-08-01), Shiraishi et al.
patent: 6178030 (2001-01-01), Yamakawa
patent: 6573921 (2003-06-01), Hayashi
patent: 6587245 (2003-07-01), Hayashi
patent: 6731419 (2004-05-01), Koreeda
patent: 6757089 (2004-06-01), Hayashi
patent: 6768506 (2004-07-01), Hayashi et al.
patent: 6771296 (2004-08-01), Hayashi et al.
patent: 6856439 (2005-02-01), Inagaki
patent: 6903856 (2005-06-01), Hayashi
patent: 6906739 (2005-06-01), Suzuki et al.
patent: 2005/0151826 (2005-07-01), Suzuki et al.
patent: 7-43627 (1995-02-01), None
patent: 8-136840 (1996-05-01), None
patent: 9-054263 (1997-02-01), None
patent: 9-127443 (1997-05-01), None
patent: 9-146030 (1997-06-01), None
patent: 11-157128 (1999-06-01), None
patent: 2000-47127 (2000-02-01), None
patent: 2001-004948 (2001-01-01), None
patent: 2001-010107 (2001-01-01), None
patent: 2001-033720 (2001-02-01), None
patent: 2001-255479 (2001-09-01), None
patent: 2001-343603 (2001-12-01), None
patent: 2003-29183 (2003-01-01), None
patent: 2004-70190 (2004-03-01), None
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Phan James
Ricoh & Company, Ltd.
LandOfFree
Optical scanning device and image forming apparatus using... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical scanning device and image forming apparatus using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical scanning device and image forming apparatus using... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2756214