| 摘要 |
PROBLEM TO BE SOLVED: To hardly give rise to contrast unevenness and color unevenness of images by compensating the nonuniformity of the light power distribution of a light beam spot in a horizontal scanning direction due to staining of reflective surfaces of rotary polygon mirrors of optical scanning arrangements used for exposing devices by the dependence of the reflectivity to the reflective surfaces on incident angles. SOLUTION: The image forming apparatus is provided with at least one or more of image forming stations disposed with electrostatic charging means, exposing means, developing means, and transferring means around an image carrier and transfers the toner images formed in such image forming stations to transfer media, wherein the optical scanning arrangements using the rotary polygon mirrors 1 as deflection reflective surfaces are used for the exposing means and the polarization directions of the incident light on the respective deflection reflective surfaces of the rotary polygon mirrors 1 of the optical scanning arrangements are so set as as to constitute approximately P polarized light and are so set as to make the light 15 incident on the respective deflection reflective surfaces of the rotary polygon mirrors from the deflection upstream side of the deflection light beams 16 by the rotary polygon mirrors 1. COPYRIGHT: (C)2006,JPO&NCIPI
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