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    • 10. 发明授权
    • Inner zoom lens system
    • 内变焦镜头系统
    • US07336427B2
    • 2008-02-26
    • US11281402
    • 2005-11-18
    • Sang Hyuck LeeHo Seop JeongChon Su Kyong
    • Sang Hyuck LeeHo Seop JeongChon Su Kyong
    • G02B15/14
    • G02B13/18G02B15/177
    • An inner zoom lens system for use in a camera module having an image sensor and appropriate for an inner-focus type is provided. The inner zoom lens system includes, sequentially from an object side, a first lens group, a second lens group, a third lens group, and a fourth lens group. The first lens group is fixed and has minus refractive power. The second lens group has plus refractive power and performs a zooming operation by moving such that an interval between the first and the second lens groups is reduced when zooming from a wide angle end to a telephoto end. The third lens group has minus refractive power and moves such that a position of an image plane is corrected depending the zooming due to the movement of the second lens group. The fourth lens group has plus refractive power.
    • 提供了一种用于具有适于内聚焦类型的图像传感器的相机模块中的内部变焦透镜系统。 内部变焦透镜系统从物体侧依次包括第一透镜组,第二透镜组,第三透镜​​组和第四透镜组。 第一透镜组是固定的,具有负折射光焦度。 第二透镜组具有加折射力并且通过移动执行缩放操作,使得当从广角端到远摄端放大时,第一和第二透镜组之间的间隔减小。 第三透镜组具有负折光力,并且移动,使得由于第二透镜组的移动而使得根据变焦而校正像平面的位置。 第四透镜组具有加折射光焦度。