Optical scanning apparatus and image forming apparatus

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

2008-01-31

2010-12-21

Font, Frank G (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S213100, C359S223100, C359S226100

Reexamination Certificate

active

07855818

ABSTRACT:
In an optical scanning apparatus, an aperture is provided between a semiconductor laser in a light source unit and an oscillating mirror, and between a cylindrical lens and the oscillating mirror. When a light beam from the semiconductor laser comes into an reflection surface of the oscillating mirror, the optical scanning apparatus is configured to limit a beam width of the light beam to a width appropriate to the reflection surface, and then to ensure an irradiation position of the light beam in a main-scanning direction to come into the reflection surface of the oscillating mirror, by causing the light beam to pass through an opening of the aperture.

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