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    Optical scanning device
    1.
    发明公开
    Optical scanning device 失效
    Optische Abtastvorrichtung

    公开(公告)号：EP0813090A3

    公开(公告)日：1998-08-05

    申请号：EP97109606

    申请日：1997-06-12

    申请人： CANON KK

    发明人： YAMAWAKI TAKESHI ,  KONDO KAYUZUKI ,  SATO HIROSHI ,  KIMURA KAZUMI

    IPC分类号： B41J2/44 ,  B41J2/47 ,  G02B3/06 ,  G02B13/00 ,  G02B26/10 ,  G02B26/12 ,  G06K15/12

    CPC分类号： B41J2/471 ,  G02B26/125

    摘要： An optical scanning device corrects a scanning line curvature and prevents image quality degradation, while spatially separating a plurality of light beams at oblique angles of incidence despite its compact magnifying optical scanning device construction. The optical scanning device directs, to the deflection surface of an optical deflector via a cylindrical lens, the plurality of light beams emitted by a light source having a plurality of light emission sections, guides, via an f lens system to a surface being scanned, the plurality of light beams deflected by the optical deflector so that the plurality of light beams scan the surface being scanned. The f lens system has a plurality of rotationally asymmetrical lenses, the optical axes of which are substantially parallel with the light beams incident on the respective lenses, and each of the generatrices that connect the vertices of a radius curvature on a lens surface in the sub scanning direction of the rotationally asymmetrical lenses is curved in a sub scan direction.

    摘要翻译： 尽管其小型放大光学扫描装置构造，光学扫描装置校正扫描线曲率并且防止图像质量劣化，同时在倾斜入射角处空间分离多个光束。 光学扫描装置通过柱面透镜将光源发射的多个光束引导至光学偏转器的偏转表面，该光束具有多个光发射部分，经由fθ透镜系统引导至被扫描的表面 由光学偏转器偏转的多个光束使得多个光束扫描被扫描的表面。 fθ透镜系统具有多个旋转对称的透镜，其光轴基本平行于入射到各个透镜上的光束，并且每个母线连接在透镜表面上的曲率半径的顶点 旋转非对称透镜的副扫描方向在副扫描方向上弯曲。