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    • 8. 发明申请
    • ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING SAME
    • 变焦镜头和图像拾取装置,包括它们
    • US20110080652A1
    • 2011-04-07
    • US12895575
    • 2010-09-30
    • Hiroki NakayamaChiaki InoueMasaru Sakamoto
    • Hiroki NakayamaChiaki InoueMasaru Sakamoto
    • G02B15/167
    • G02B15/173G02B13/009
    • A zoom lens includes, in order from an object side to an image side and arranged along an optical axis, first to fifth lens units having positive, negative, positive, positive or negative, and positive refractive power, respectively. When zooming, the second lens unit moves monotonically to the image side, the third lens unit moves to the object side in a convex locus, the fifth lens unit moves nonlinearly, and the first and fourth lens units do not move. The fourth lens unit includes a first sub lens unit and a second sub lens unit; the first sub lens unit is an image-stabilizing lens unit that includes a first lens having negative refractive power and a second lens having positive or negative refractive power. The focal length of the fourth lens unit, the focal length of the entire system at the wide-angle end, the Abbe numbers of the materials of the first and second lenses are set appropriately based on predetermined conditions.
    • 变焦透镜从物体侧到像侧依次沿光轴布置,分别具有正,负,正,正或负和正屈光力的第一至第五透镜单元。 当变焦时,第二透镜单元单调地移动到图像侧,第三透镜​​单元以凸形轨迹移动到物体侧,第五透镜单元非线性移动,第一和第四透镜单元不移动。 第四透镜单元包括第一子透镜单元和第二子透镜单元; 第一子透镜单元是包括具有负折光力的第一透镜和具有正或负折射光焦度的第二透镜的图像稳定透镜单元。 基于预定条件适当地设置第四透镜单元的焦距,广角端处的整个系统的焦距,第一和第二透镜的材料的阿贝数。