发明名称 |
Optical scanning device and image forming apparatus |
摘要 |
An optical scanning device includes a light source; a scanning unit to deflect/scan a laser beam from the light source; an imaging optical system to focus the deflected and scanned laser beam to a scan-target surface; an electro-optic element to electrically change a refractive index thereof; a controller to control the refractive index of the electro-optic element to adjust deflection amount of the laser beam; and a positional shift detecting unit, disposed away from the light path, to detect a positional shift of the incident laser beam from an ideal position in a sub-scanning direction. The device further includes a beam splitting element, and the controller adjusts a deflection amount of the laser beam from the electro-optic element based on a detection result by the positional shift detecting unit and corrects a positional shift in the sub-scanning direction of the laser beam on the scan-target surface. |
申请公布号 |
US8179580(B2) |
申请公布日期 |
2012.05.15 |
申请号 |
US201113106209 |
申请日期 |
2011.05.12 |
申请人 |
IWAMATSU AKIHIRO;YOSHIMURA KENICHI;SHIMIZU KOHEI;INOUE TOKIKO;NAKAJIMA MITSURU;RICOH COMPANY, LTD. |
发明人 |
IWAMATSU AKIHIRO;YOSHIMURA KENICHI;SHIMIZU KOHEI;INOUE TOKIKO;NAKAJIMA MITSURU |
分类号 |
G02B26/08 |
主分类号 |
G02B26/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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