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    • 4. 发明授权
    • Zoom lens system
    • 变焦镜头系统
    • US07242532B2
    • 2007-07-10
    • US11446319
    • 2006-06-05
    • Atsushi ShibayamaKeiko Mizuguchi
    • Atsushi ShibayamaKeiko Mizuguchi
    • G02B15/14G02B27/64
    • G02B15/173
    • Object is to provide an inner-focusing type zoom lens system carrying out focusing by moving a portion of a first lens group suitable for an auto-focus SLR camera. A zoom lens system includes, in order from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, and a third lens group having positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first and the second lens groups increases, and a distance between the second and the third lens groups decreases. The first lens group is composed of, in order from the object, a 1A lens group G1A having positive refractive power, and a 1B lens group G1B having positive refractive power. Focusing from infinity to a close-range object is carried out by moving only the 1B lens group G1B to the object.
    • 目的是提供一种通过移动适合于自动对焦单反相机的第一透镜组的一部分来进行聚焦的内聚焦型变焦透镜系统。 变焦透镜系统从物体依次包括具有正折光力的第一透镜组,具有负折光力的第二透镜组和具有正折光力的第三透镜组。 当从广角端状态变焦到长焦端状态时,第一和第二透镜组之间的距离增加,并且第二和第三透镜组之间的距离减小。 第一透镜组按照从物体起依次具有正折射光焦度的1A透镜组G 1A和具有正屈光力的1B透镜组G 1B。 通过将1B透镜组G 1 B移动到物体来进行从无穷远到近距离物体的聚焦。
    • 5. 发明申请
    • Zoom lens system
    • 变焦镜头系统
    • US20060215279A1
    • 2006-09-28
    • US11384432
    • 2006-03-21
    • Atsushi Shibayama
    • Atsushi Shibayama
    • G02B15/14
    • G02B15/173G02B27/646
    • Providing a zoom lens system that satisfies making the focusing lens light and reducing a moving amount for focusing, simultaneously. The zoom lens system includes a first lens group having positive power, a second lens group having negative power and a third lens group having positive power. When zooming from a wide-angle end state to a telephoto end state, at least the first and third lens groups are moved such that a distance between the first and second lens groups increases, and a distance between the second and third lens groups decreases. The first lens group is composed of a front lens group with positive power having at least one negative lens and at least one positive lens, and a rear lens group with positive power having one positive lens. Focusing from infinity to a close object is carried out by moving only the rear lens group to the object.
    • 提供一种满足聚焦透镜的光并同时减少聚焦移动量的变焦透镜系统。 变焦透镜系统包括具有正光焦度的第一透镜组,具有负光焦度的第二透镜组和具有正光焦度的第三透镜组。 当从广角端状态变焦到望远端状态时,至少第一透镜组和第三透镜组移动,使得第一和第二透镜组之间的距离增加,并且第二和第三透镜组之间的距离减小。 第一透镜组由具有至少一个负透镜和至少一个正透镜的具有正功率的前透镜组和具有正透镜的正光焦度的后透镜组组成。 通过将后透镜组移动到对象来进行从无穷远到近距离物体的聚焦。
    • 6. 发明授权
    • Zoom lens system
    • 变焦镜头系统
    • US06498688B2
    • 2002-12-24
    • US10083398
    • 2002-02-27
    • Atsushi Shibayama
    • Atsushi Shibayama
    • G02B1514
    • G02B15/177
    • The present invention provides a compact zoom lens system suitable for a video camera and a digital still camera using a solid-state imaging device, having a zoom ratio of 3.5 or more, an angle of view in a wide-angle end state of about 60°, and superb optical performance. According to one aspect, in order from an object side, a first lens group has negative refractive power, a second lens group has positive refractive power, and a third lens group has positive refractive power. The front principal point of the second lens group is located to the object side of the most object side surface of the second lens group. The distance between the first and second lens group is decreased and the distance between the second and third lens group is increased upon zooming from a wide-angle end state to a telephoto end state. Predetermined conditional expressions are satisfied.
    • 本发明提供一种适用于摄像机的紧凑型变焦透镜系统和使用固态成像装置的数字静态照相机,其具有3.5或更大的变焦比,在广角端状态下的视角为约60 °,以及出色的光学性能。 根据一个方面,从物体侧开始,第一透镜组具有负折光力,第二透镜组具有正折射光焦度,并且第三透镜组具有正折射光焦度。 第二透镜组的前主点位于第二透镜组的最物体侧表面的物体侧。 第一透镜组和第二透镜组之间的距离减小,并且在从广角端状态变焦到望远端状态时,第二透镜组和第三透镜组之间的距离增大。 满足预定条件表达式。
    • 8. 发明授权
    • Variable magnification optical zoom lens system
    • 可变倍率光学变焦镜头系统
    • US06124984A
    • 2000-09-26
    • US990063
    • 1997-12-12
    • Atsushi ShibayamaKoichi Ohshita
    • Atsushi ShibayamaKoichi Ohshita
    • G02B15/177G02B27/14G02B15/14G02B3/02
    • G02B15/177
    • A variable magnification zoom lens system comprising: in order from the object side, a first lens group having a negative refractive power and a focal length f1; a second lens group having a positive refractive power; and a third lens group having a positive refractive power and a focal length f3 with the first and second lens group arranged to be driven together such that when zooming is performed from the maximum wide-angle state to the maximum telephoto state of the zoom lens system, the first lens group and the second lens group move such that the distance between the first lens group and the second lens group is decreased, and at the same time, the distance between second lens group and the third lens group is increased and with the following condition being fulfilled: 0.4
    • 一种可变倍率变焦透镜系统,包括:从物体侧起依次具有负折射力和焦距f1的第一透镜组; 具有正屈光力的第二透镜组; 以及具有正折射力的第三透镜组和焦距f3,其中第一和第二透镜组被布置成被驱动在一起,使得当从变焦透镜系统的最大广角状态到最大远摄状态执行变焦时 第一透镜组和第二透镜组移动使得第一透镜组和第二透镜组之间的距离减小,并且同时第二透镜组和第三透镜组之间的距离增加,并且与 满足以下条件:0.4