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    • 28. 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。