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    • 11. 发明授权
    • Optical scanning device and image forming apparatus
    • 光学扫描装置和图像形成装置
    • US09116351B2
    • 2015-08-25
    • US13224838
    • 2011-09-02
    • Shigeaki ImaiYukio ItamiKensuke Masuda
    • Shigeaki ImaiYukio ItamiKensuke Masuda
    • G02B26/08G02B5/09B41J2/44G02B26/12B41J2/47
    • G02B26/124B41J2/442B41J2/473G02B5/09G02B26/123
    • Provided is an optical scanning device including: a plurality of light sources; an optical deflector that includes reflection surfaces that deflect different light beams toward opposite sides of the optical deflector; and a light-shielding member provided in an area between incident light beams emitted from the plurality of light sources. The light-shielding member is positioned such that a portion of the light-shielding member is in a light-shield area surrounded by a circumscribed circle of the optical deflector, a line tangent to the circumscribed circle and orthogonal to a Y direction, and the incident light beam, the Y direction being a direction parallel to a main scanning direction and passing through a rotation center of the optical deflector, the main scanning direction being a direction, in which surfaces of image carriers are scanned.
    • 提供一种光学扫描装置,包括:多个光源; 光学偏转器,其包括使不同光束朝向光学偏转器的相对侧偏转的反射面; 以及设置在从所述多个光源发射的入射光束之间的区域中的遮光构件。 遮光部件被定位成使得遮光部件的一部分处于由光偏转器的外接圆包围的遮光区域中,与外接圆相切并与Y方向正交的线, 入射光束,Y方向是与主扫描方向平行的方向,并且穿过光偏转器的旋转中心,主扫描方向是图像载体的表面被扫描的方向。
    • 17. 发明授权
    • Light-amount detecting device, light source device, optical scanning unit and image forming apparatus
    • 光量检测装置,光源装置,光扫描装置和图像形成装置
    • US08081203B2
    • 2011-12-20
    • US12039405
    • 2008-02-28
    • Kensuke MasudaTomohiro NakajimaSatoru ItohDaisuke IchiiMasahiro SoedaYoshinori Hayashi
    • Kensuke MasudaTomohiro NakajimaSatoru ItohDaisuke IchiiMasahiro SoedaYoshinori Hayashi
    • B41J2/435B41J27/00
    • G02B26/124G03G15/0435G03G15/326
    • A light-amount detecting device includes: a light source which emits a light beam; a branching optical element which divides the light beam emitted from the light source into a first light beam traveling in a predetermined direction and a second light beam traveling in a direction different to the predetermined direction; a light-condensing element which condenses the second light beam; a light-receiving element having a light-receiving surface which receives the second light beam condensed by the light-condensing element; and a detector which detects a light-amount of the second light beam received by the light-receiving element, and at least one of a direction of reflected light of the second light beam reflected from the light-receiving surface of the light-receiving element and spread of the reflected light of the second light beam reflected from the light-receiving surface of the light-receiving element is adjusted to control a light-amount of the reflected light of the second light beam returning to the light source.
    • 光量检测装置包括:发射光束的光源; 分光光学元件,其将从光源发射的光束分成沿预定方向行进的第一光束和沿与所述预定方向不同的方向行进的第二光束; 冷凝所述第二光束的聚光元件; 具有受光面的光接收元件,所述光接收表面接收由所述聚光元件会聚的所述第二光束; 以及检测器,其检测由光接收元件接收的第二光束的光量,以及从受光元件的受光面反射的第二光束的反射光的方向中的至少一个 并且调节从光接收元件的光接收表面反射的第二光束的反射光的扩展,以控制返回到光源的第二光束的反射光的光量。