Optical scanning apparatus and image forming apparatus

Details Optical scanning apparatus and image forming apparatus Optical scanning apparatus and image forming apparatus

2006-10-03

2006-10-03

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Deflection using a moving element

By moving a reflective element

C359S196100

Reexamination Certificate

active

07116457

ABSTRACT:
In an optical scanning apparatus in which a movable plate653pivots at a high speed, friction between the movable plate653and air generates heat. The amount of generated heat is relatively large in a main scanning direction but relatively small in a direction of a pivot axis. A light beam is converged in a sub scanning direction Y within a sub-scanning surface, and is focused as a line image in the vicinity of a deflection mirror surface651in a deflector65. This reduces the size of the deflection mirror surface651in the direction Y of the pivot axis (the sub scanning direction). Meanwhile, a second distance is longer than a first distance in the main scanning direction, and the movable plate653and vertical side portions (second adjacent portions)652bare widely apart from each other in the main scanning direction X. This reduces air resistance against the movable plate653, and hence, the amount of heat generation.

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