Invention Grant
- Patent Title: Optical scan apparatus, image formation apparatus, optical deflector manufacturing method, polygon mirror processing method, and polygon mirror processing apparatus
- Patent Title (中): 光学扫描装置，图像形成装置，光学偏转器制造方法，多面镜处理方法以及多面镜处理装置
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Application No.: US12013206Application Date: 2008-01-11
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Publication No.: US07898709B2Publication Date: 2011-03-01
- Inventor: Kensuke Masuda , Yukio Itami , Hisashi Inada , Kiyofumi Arai , Takeshi Kikuchi , Yoshihiro Takahashi , Tomotaka Takamura
- Applicant: Kensuke Masuda , Yukio Itami , Hisashi Inada , Kiyofumi Arai , Takeshi Kikuchi , Yoshihiro Takahashi , Tomotaka Takamura
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Dickstein Shapiro LLP
- Priority: JP2007-004730 20070112; JP2007-052205 20070302
- Main IPC: G02B26/08
- IPC: G02B26/08 ; B41J27/00
Abstract:
In the optical deflector, the mean width of profile elements of a cross section of the deflection surface in the sub scan direction is set to be less than the spacing between spots of the light beams formed in the sub scan direction of the deflection surface. This makes it possible to prevent a variation in the size and shape of the spots of the light beams deflected by the deflection surface due to the undulation (unevenness) of the deflection surface. As a result, it is able to suppress a decrease of the granularity of images and form images with high quality.
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