Optical scanning system with reduced spherical aberration...

Details Optical scanning system with reduced spherical aberration... Optical scanning system with reduced spherical aberration...

2006-10-20

2009-06-23

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C359S197100, C359S215100, C359S216100, C347S259000

Reexamination Certificate

active

07550712

ABSTRACT:
An optical scanning system and an image forming apparatus having the same. The optical scanning system includes a light source, a deflector, an input optical system for directing a light beam from the light source to the deflector, and an imaging optical system for directing the light beam deflected by the deflector onto a surface to be scanned. The input optical system includes a first optical element having a power both in a main-scan sectional plane and in a sub-scan sectional plane, and a second optical element having a power in the sub-scan sectional plane. At least one surface of the first optical element has a shape being rotationally asymmetrical and, in the sub-scan sectional plane, being non-arcuate.

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patent: 11-6954 (1999-01-01), None

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