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    • 66. 发明申请
    • Zoom lens and image pickup apparatus
    • 变焦镜头和摄像设备
    • US20060056048A1
    • 2006-03-16
    • US11223025
    • 2005-09-12
    • Hiroshi SatoTakumi Matsui
    • Hiroshi SatoTakumi Matsui
    • G02B15/14
    • G02B15/173G02B13/0065G02B13/009
    • A zoom lens includes: a first lens group having a positive refractive power and statically positioned along an optical axis when a power of the zoom lens is varied or the zoom lens is focused; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group. The second and fourth lens groups are moved for varying the power of the zoom lens and the fourth lens group is further moved for focusing the zoom lens. The first lens group includes a reflective optical element for bending an optical path. The second lens group includes a cemented lens including a positive lens and a negative lens. The fourth lens group includes two positive lenses, and the fifth lens group includes one positive lens having at least one aspherical surface.
    • 变焦透镜包括:当变焦镜头的焦距变化或变焦镜头被聚焦时,具有正折光力并沿着光轴静态定位的第一透镜组; 具有负屈光力的第二透镜组; 具有正屈光力的第三透镜组; 具有正折射光焦度的第四透镜组; 第五个镜头组。 移动第二和第四透镜组以改变变焦透镜的功率,并且第四透镜组进一步移动以聚焦变焦透镜。 第一透镜组包括用于弯曲光路的反射光学元件。 第二透镜组包括具有正透镜和负透镜的胶合透镜。 第四透镜组包括两个正透镜,第五透镜组包括一个具有至少一个非球面的正透镜。
    • 67. 发明申请
    • Optical scanning device and image forming apparatus using the same
    • 光学扫描装置及使用其的成像装置
    • US20060033799A1
    • 2006-02-16
    • US11248255
    • 2005-10-13
    • Keiichiro IshiharaHiroshi SatoManabu KatoHidekazu Shimomura
    • Keiichiro IshiharaHiroshi SatoManabu KatoHidekazu Shimomura
    • B41J2/385
    • G02B26/125G02B26/123G02B26/124
    • Disclosed is an optical scanning device which includes a light source device, a deflecting system for deflecting a light beam emitted from the light source device, and a scanning optical system for scanning a surface to be scanned, with the light beam deflected by the deflecting system, wherein the scanning optical system includes a scanning optical element disposed so that, with respect to a sub-scan direction, a principal ray of the deflected light beam passes a portion other than an optical axis, wherein the scanning optical element has a sagittal aspherical amount changing surface in which an aspherical amount of a sagittal changes along a main scan direction of the scanning optical element, and wherein, throughout the whole surface to be scanned, the position in the sub-scan direction upon which the deflected light beam impinges is made even.
    • 公开了一种光学扫描装置,其包括光源装置,用于偏转从光源装置发射的光束的偏转系统和用于扫描待扫描表面的扫描光学系统,由偏转系统偏转的光束 其特征在于,所述扫描光学系统包括扫描光学元件,所述扫描光学元件相对于副扫描方向,所述偏转光束的主光线通过除了所述光轴以外的部分,其中所述扫描光学元件具有矢状非球面 其中矢量的非球面量沿着扫描光学元件的主扫描方向改变的量变化表面,并且其中在整个扫描的整个表面上,偏转的光束撞击的副扫描方向上的位置是 甚至连