Zoom lens system, imaging device and camera
    1.
    发明授权
    Zoom lens system, imaging device and camera 有权
    变焦镜头系统,成像设备和相机

    公开(公告)号:US09513472B2

    公开(公告)日:2016-12-06

    申请号:US14573406

    申请日:2014-12-17

    Abstract: A zoom lens system, in order from an object side to an image side, comprising: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having positive optical power; a fourth lens unit having negative optical power; a fifth lens unit; and a sixth lens unit, wherein in zooming from a wide-angle limit to a telephoto limit at a time of image taking, the first lens unit, the second lens unit, the third lens unit, and the fourth lens unit move along an optical axis so that an interval between the third lens unit and the fourth lens unit at the telephoto limit is larger than that at the wide-angle limit, and wherein focusing from an infinity in-focus condition to a close-object in-focus condition is performed by moving the fourth lens unit along the optical axis.

    Abstract translation: 变焦透镜系统,从物体侧到像侧依次包括:具有正光焦度的第一透镜单元; 具有负光焦度的第二透镜单元; 具有正光焦度的第三透镜单元; 具有负光焦度的第四透镜单元; 第五透镜单元; 以及第六透镜单元,其中,从图像拍摄时的广角极限变焦到望远极限时,第一透镜单元,第二透镜单元,第三透镜​​单元和第四透镜单元沿着光学 使得在远摄极限处的第三透镜单元和第四透镜单元之间的间隔大于广角极限处的间隔,并且其中从无限远对焦条件到近距离对焦条件的聚焦是 通过沿着光轴移动第四透镜单元来执行。

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