| 摘要 |
PURPOSE:To simplify the adjusting mechanism of an entire device in the case that scanning density is switched as to an image forming device. CONSTITUTION:When recording density is switched, the speed of a photosensitive body is not changed, clock frequency is proportioned the product of the recording density of main and sub scanning, a slit part 19 switching a spot diameter provided on an optical system in accordance with the recording density is actuated, the rotating speed of a polygon mirror 21 is proportioned beam intensity is changed in accordance with the to the recording density in a sub-scanning direction, and light beam intensity is changed in accordance with the recording density. |
