Light scanning system and image forming apparatus

Details Light scanning system and image forming apparatus Light scanning system and image forming apparatus

2007-11-29

2010-12-07

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S206100, C347S244000, C347S259000

Reexamination Certificate

active

07847994

ABSTRACT:
A light scanning system and an image forming apparatus including the same, the light scanning system including: one or more light sources to emit light; a deflector to deflect the emitted light; and one or more f-θ lenses to focus the deflected light onto a photosensitive medium, wherein the light emitted by the one or more light sources is obliquely incident on a plane perpendicular to a rotational axis of the deflector, and the f-θ lens satisfies −0.5<R1/R2<0.2, where R1is a curvature radius of an entrance surface of the respective f-θ lens in a main-scanning direction and R2is a curvature radius of an exit surface of the respective f-θ lens in the main-scanning direction.

REFERENCES:
patent: 5111219 (1992-05-01), Makino
patent: 5812181 (1998-09-01), Ishibe
patent: 6801239 (2004-10-01), Nakahata
patent: 7034859 (2006-04-01), Ishihara et al.
patent: 2003/0048516 (2003-03-01), Tokunaga
patent: 2004-21133 (2004-01-01), None

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