| 摘要 |
<P>PROBLEM TO BE SOLVED: To form an image of high quality at a reduced cost in a color electrophotographic apparatus. <P>SOLUTION: The image forming apparatus has an optical beam from LD2 deflected in a main scanning direction by a polygon mirror 1 provided with four reflecting surfaces which are all different inclination angles. Lighting control of LD2 is carried out as well as fθ compensation by a CPU8 and a laser diode control part 6. The fθ compensation is carried out on the basis of a parameter corresponding to an optical path length from the polygon mirror 1 to a photoreceptor 4. Alternatively, adjustment is made so that the optical path lengths from the polygon mirror 1 to the photoreceptor 4 may be all equivalent. An electrophotographic latent image is formed by having a deflected optical beam hit the electrified photoreceptor 4. By supplying the developer to the electrostatic latent image, the electrostatic latent image is transferred to paper and fixed as a visualized image. <P>COPYRIGHT: (C)2009,JPO&INPIT |
