Optical scanning apparatus and image forming apparatus using...

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

2007-05-29

2007-05-29

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S207110, C359S205100, C347S232000, C347S243000, C347S244000

Reexamination Certificate

active

11263910

ABSTRACT:
Disclosed is an optical scanning apparatus for repeatedly optically scanning a plurality of surfaces to be scanned, including: a plurality of light sources; an optical deflector for deflecting and reflecting a plurality of light beams emitted from the plurality of light sources; and at least one scanning optical system for guiding the plurality of light beams which are deflected and reflected by the optical deflector to the different surfaces to be scanned. In the optical scanning apparatus, the plurality of light beams incident on the optical deflector are incident on a deflection surface of the optical deflector at different angles to a normal of the deflection surface, the scanning optical system is commonly used for the plurality of light beams, and the scanning optical system includes a first optical element that satisfies 0≦|φ1s|<0.001 where φ1s represents optical power of the scanning optical system within a sub scanning section.

REFERENCES:
patent: 6459520 (2002-10-01), Takayama
patent: 6501586 (2002-12-01), Takayama
patent: 6504558 (2003-01-01), Takayama
patent: 6519070 (2003-02-01), Takayama
patent: 6717704 (2004-04-01), Nakai
patent: 6856439 (2005-02-01), Inagaki
patent: 7031039 (2006-04-01), Takayama
patent: 2004/0156084 (2004-08-01), Takayama
patent: 1-281468 (1989-11-01), None

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