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    • 6. 发明授权
    • Zoom lens system and optical apparatus using the same
    • 变焦镜头系统及使用其的光学装置
    • US07667900B2
    • 2010-02-23
    • US12023066
    • 2008-01-31
    • Mami Muratani
    • Mami Muratani
    • G02B15/14
    • G02B15/177G02B13/18
    • Providing a zoom lens system excellently correcting various aberrations with accomplishing to be compact, lightweight, and slim upon being accommodated, and to provide an optical apparatus using the zoom lens system. The system consists of, in order from an object, a first group G1 having negative power, a second group G2 having positive power. Upon zooming from a wide-angle end W to a telephoto end T, a distance between the first group G1 and the second group G2 decreases. The first group G1 consists of, in order from the object, a first lens L1 having negative power and a second lens L2 having positive power. The second group G2 consists of, in order from the object, a third lens L3 having positive power, a fourth lens L4 having negative power, and a fifth lens L5 having positive power. Given conditions are satisfied.
    • 提供一种变形透镜系统,其优异地校正各种像差,实现了紧凑,重量轻,并且在被容纳时变薄,并且提供了使用变焦透镜系统的光学装置。 该系统按照从物体起依次具有负功率的第一组G1,具有正功率的第二组G2。 当从广角端W变焦到长焦端T时,第一组G1和第二组G2之间的距离减小。 第一组G1从物体起依次具有负功率的第一透镜L1和具有正光焦度的第二透镜L2。 第二组G2按照从物体起依次具有正功率的第三透镜L3,负功率的第四透镜L4和具有正功率的第五透镜L5组成。 给定条件满意。
    • 8. 发明授权
    • Zoom lens system
    • 变焦镜头系统
    • US07253964B2
    • 2007-08-07
    • US11224928
    • 2005-09-14
    • Mami Muratani
    • Mami Muratani
    • G02B15/14
    • G02B15/173
    • An object is to provide a zoom lens system having compactness, a high zoom ratio, and high optical performance with preferably correcting various aberrations. The zoom lens system includes, in order from the object, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, and a fourth lens group G4 having positive refractive power. When a state of lens group positions varies from a wide-angle end state to a telephoto end state, a distance between the first lens group G1 and the second lens group G2 increases, a distance between the second lens group G2 and the third lens group G3 decreases, a distance between the third lens group G3 and the fourth lens group G4 varies, and the fourth lens group G4 moves along a zoom trajectory having a convex shape facing to an image.
    • 目的是提供一种具有紧凑性,高变焦比和高光学性能的变焦透镜系统,优选地校正各种像差。 变焦透镜系统从物体起依次包括具有正折光力的第一透镜组G 1,具有负折光力的第二透镜组G 2,具有正折光力的第三透镜组G 3和第四透镜组 G 4具有正的屈光力。 当透镜组位置的状态从广角端状态变化到望远端状态时,第一透镜组G 1和第二透镜组G 2之间的距离增加,第二透镜组G 2与第二透镜组G 2之间的距离 第三透镜组G 3减小,第三透镜​​组G 3和第四透镜组G 4之间的距离变化,并且第四透镜组G 4沿着具有面向图像的凸形的变焦轨迹移动。