Optical scanning device and image forming apparatus using...

Details Optical scanning device and image forming apparatus using... Optical scanning device and image forming apparatus using...

2011-03-22

2011-03-22

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S214100, C359S215100, C347S259000

Reexamination Certificate

active

07911669

ABSTRACT:
An optical scanning device includes a condensing optical system for collecting a light beam emitted from light source means, a deflecting system for scanningly deflecting the light beam collected by the condensing optical system, and an imaging optical system configured to image the light beam scanningly deflected by the deflecting means, on a surface to be scanned, the deflecting means having a deflecting surface reciprocally movable within a main-scan sectional plane to scanningly deflect the light beam from the condensing optical system, wherein, when the deflecting surface reciprocally moves within the main-scan sectional plane, the deflecting surface receives an angular acceleration which is able to cause deformation being asymmetric with respect to a sub-scan direction, and wherein the condensing optical system collects the light beam from the light source means to a region of the deflecting surface which is at a side of a central line of the deflecting surface with respect to the sub-scan direction where an amount of asymmetric deformation of the deflecting surface in the sub-scan direction is smaller than that at the other side.

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patent: 7068406 (2006-06-01), Shimomura
patent: 7190498 (2007-03-01), Shimomura
patent: 2005/0243396 (2005-11-01), Fujii et al.
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European Search Report dated Apr. 6, 2009 from corresponding European Application No. 08002640.4.
European Search Report dated May 7, 2008 from corresponding European Application No. 08002640.4.

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