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    • 9. 发明申请
    • OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS
    • 光学扫描装置和图像形成装置
    • US20110286067A1
    • 2011-11-24
    • US13106209
    • 2011-05-12
    • Akihiro IWAMATSUKenichi YoshimuraKohei ShimizuTokiko InoueMitsuru Nakajima
    • Akihiro IWAMATSUKenichi YoshimuraKohei ShimizuTokiko InoueMitsuru Nakajima
    • G02B26/10
    • G02B26/127G02F1/29
    • 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.
    • 光学扫描装置包括光源; 扫描单元,用于偏转/扫描来自光源的激光束; 成像光学系统,用于将偏转和扫描的激光束聚焦到扫描目标表面; 电光元件,用于电变化其折射率; 控制器,用于控制电光元件的折射率以调节激光束的偏转量; 以及位置偏移检测单元,其远离光路设置,以检测入射激光束在副扫描方向上的理想位置的位置偏移。 该装置还包括分束元件,并且控制器基于位置偏移检测单元的检测结果来调整来自电光元件的激光束的偏转量,并校正副扫描方向上的位置偏移 激光束在扫描目标表面上。