Light scanning device

Details Light scanning device Light scanning device

2008-01-24

2008-11-04

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S207110, C359S216100

Reexamination Certificate

active

07446918

ABSTRACT:
A rotational multifaceted mirror (24) deflects a laser light outgoing from a semiconductor laser (21), so that the light scanning device (2) which scans the photoconductive drum (131) has a third optical system (25) having a correction lens (5) whose curvature radii are different on the incident side surface (5a) and the outgoing side surface (5b) in a cross section in the sub-scanning direction which is perpendicular to the main scanning direction. The correction lens (5) is so configured as to be rotatable about a line (L2) which passes through an intersection “a” between an optical axis (L1) of the correction lens (5) and a surface having a curvature radius which is smaller among the surfaces (5a, 5b) and is rotatable about a line (L2) parallel to the main scanning direction.

REFERENCES:
patent: 5557446 (1996-09-01), Kato
patent: 6987593 (2006-01-01), Hayashi et al.
patent: 7038823 (2006-05-01), Morimoto et al.
patent: 2006-39399 (2006-02-01), None

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