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    • 4. 发明授权
    • Optical beam scanning device and image forming apparatus provided with the same
    • 光束扫描装置和具有该光束扫描装置的图像形成装置
    • US07876487B2
    • 2011-01-25
    • US11421462
    • 2006-05-31
    • Masao Yamaguchi
    • Masao Yamaguchi
    • G02B26/08
    • H04N1/024H04N1/1135H04N2201/0246H04N2201/02466H04N2201/02481H04N2201/02485
    • A technique is provided which can improve optical characteristics by suppressing the occurrence of an error in attachment of a rotary deflector that deflects a light flux from a light source and scans it in a main scanning direction. There are provided a rotary deflector that deflects the light flux from the light source and scans it in the main scanning direction, an imaging optical system that images the light flux scanned by the rotary deflector onto a specified scanning object, a support part that supports the rotary deflector rotatably, and a positioning part that comes in contact with the support part at plural contact positions and positions the support part, in which a shortest distance between the plural contact positions in an optical axis direction of the imaging optical system is longer than a shortest distance between the plural contact positions in the main scanning direction.
    • 提供了一种技术,其可以通过抑制使来自光源的光束偏转并使其沿主扫描方向扫描的旋转偏转器的附着而发生误差而提高光学特性。 提供了一种旋转偏转器,其使来自光源的光束偏转并沿主扫描方向扫描;将成像光学系统将由旋转偏转器扫描的光束成像到指定的扫描对象上,支撑部分支撑 旋转偏转器,以及定位部,其在多个接触位置与所述支撑部接触并定位所述支撑部,所述支撑部在所述摄像光学系统的光轴方向上的所述多个接触位置之间的最短距离比 在主扫描方向上的多个接触位置之间的最短距离。