Image writing apparatus and color image forming apparatus

Details Image writing apparatus and color image forming apparatus Image writing apparatus and color image forming apparatus

2007-06-05

2007-06-05

Pham, Hai (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S258000

Reexamination Certificate

active

10378623

ABSTRACT:
The present invention provides a color image forming apparatus forming an image by using a plurality of image carriers, wherein at least one lens having identical optical characteristics and forming individual scanning optical systems which scan the individual image carriers with beams is formed by use of a plurality of cavities. When dividing the cavities into a plurality of groups in response to variations in the optical characteristics caused by cavity difference of the lenses formed with the plurality of cavities so that the relative differences in an optical parameters are within an allowable range, at least one lens of each scanning optical system is selected from the cavities of one of the plurality of groups.

REFERENCES:
patent: 6256133 (2001-07-01), Suzuki et al.
patent: 6304282 (2001-10-01), Fujimoto
patent: 6489982 (2002-12-01), Ishibe
patent: 6-18796 (1994-01-01), None
patent: 8-50385 (1996-02-01), None
patent: 2000-258713 (2000-09-01), None

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