Optical scanning apparatus and method for adjusting the same

Details Optical scanning apparatus and method for adjusting the same Optical scanning apparatus and method for adjusting the same

2005-10-11

2008-09-23

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S205100, C359S210100, C359S900000, C347S259000

Reexamination Certificate

active

07428088

ABSTRACT:
An optical scanning apparatus which is free from any deterioration of drawing performance and which can be miniaturized and simplified in overall configuration, and an image forming apparatus using the optical scanning apparatus are provided. The optical scanning apparatus includes: a light source unit; an incident optical system for guiding a light beam emitted from the light source unit to a deflecting unit; and an imaging optical system for guiding the light beam deflected by the deflecting unit onto a surface to be scanned. The incident optical system includes an anamorphic condenser lens having a refractive power in a main scanning cross section and a refractive power in a sub-scanning cross section which are different from each other, and the imaging optical system has a refractive power with which a deflective surface of the deflecting unit or a vicinity of the deflective surface and the surface to be scanned are made in conjugate relation with each other, and also satisfies a conditional expression.

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patent: 7142339 (2006-11-01), Tomioka
patent: 2006/0238849 (2006-10-01), Ishibe
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