| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical scanner which is saved in occupancy space and power consumption, and can prevent dew condensation in an image forming section so as to form proper image. <P>SOLUTION: In an exposure unit 1, in which a laser scanning unit 101 emitting laser beam, a polygon mirror 102 for reflecting and deflecting the laser beam, reflecting mirrors 103a, 103b, 103c, 103d, 104a, 104b and 104c for irradiating a photoreceptor drum 3 with the laser beams, and the like are arranged in a housing 1a, a sheet-like heater 130 is provided between a dustproof glass for scattered dust 120, which is disposed on the boundary between the inside and outside of the housing 1a and through which the leaser light can pass and the housing 1a. <P>COPYRIGHT: (C)2008,JPO&INPIT |
