Optical scanning device and image forming apparatus using...

Details Optical scanning device and image forming apparatus using... Optical scanning device and image forming apparatus using...

2008-07-08

2008-07-08

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

Reexamination Certificate

active

07397589

ABSTRACT:
An optical scanning device for scanning surfaces of an even number of photoconductors simultaneously includes a rotating deflecting device arranged substantially at a center in a housing to deflect optical beams, and a plurality of scanning optical systems corresponding to the even number of photoconductors, arranged to be substantially symmetrical with the rotating deflecting device as a symmetry center. The plurality of scanning optical systems include a plurality of folding-back mirrors and at least one long lens having power in a sub-scanning direction, respectively, and the pluralities of folding-back mirrors and the at least one long lenses of the symmetrically arranged scanning optical systems are arranged to be symmetrical to each other with the rotating deflecting device as the symmetry center, respectively.

REFERENCES:
patent: 6304360 (2001-10-01), Sekikawa
patent: 10-148777 (1998-06-01), None
patent: 2002-196271 (2002-07-01), None
patent: 2002-202472 (2002-07-01), None

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