OPTICAL SCANNING DEVICE AND IMAGE FORMING DEVICE

Japanese Patent JP3686644

B2

PROBLEM TO BE SOLVED: To realize an optical scanning device which has superior stability of a light spot and high stability of imaging magnification of a scanning imaging lens and an image forming device using the same.
SOLUTION: In the optical scanning device deflects a group of light beams emitted by a plurality of light sources by a common deflecting means 5 and guides them to different scanned surfaces 7Y to 7K by scanning and imaging optical systems L1, and L2Y to L2K to form light spots and optical scan the scanned surfaces, a scanning and imaging lens comprises two or more scanning lenses and the scanning lens L1 closest to the deflecting means has positive refracting power in a vertical scanning direction; and the scanning lenses L2Y to L2K closest to the scanned surfaces have positive refracting power in both the horizontal and vertical directions and the scanning lens L1 closest to the deflecting means 5 is made common to the light beams traveling to the different scanned surfaces.

JP5310455	Image forming device
JP2001133709	PLURAL-BEAM SCANNING OPTICAL DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE
JPH03216680	IMAGE FORMING DEVICE

Naoki Miyatake

JP2002276318A

August 24, 2005

September 20, 2002

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株式会社リコー

B41J2/44; G02B13/00; G02B13/18; G02B26/10; H04N1/036; H04N1/113; (IPC1-7): G02B26/10; B41J2/44; G02B13/00; G02B13/18; H04N1/036; H04N1/113

JP7043627A
JP9146030A
JP2000047127A
JP2001255479A
JP8136840A
JP11119131A
JP10073778A

Toru Kabayama
Shogo Honda

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