| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for equalizing the length of optical paths even if the regulation of optical unit in height direction is different at both sides of a rotary polyhedral mirror in an image forming apparatus in which two or more image carriers are lined up and laser is radiated on both sides of the rotary polyhedral mirror. <P>SOLUTION: The optical path of scanning light E 1 reaching the photosensitive drum 82a closest to the installation plane S of a plurality of photosensitive drums 82a, 82b, 82c, and 82d is provided at the photosensitive drum side with respect to the optical path of scanning light E2 deflected and scanned on the same side as the side of the polygon mirror 10 for deflecting and scanning the laser beam, between the polygon mirror 10 and folding mirrors 24, 26. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
