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1. 发明授权

US08218244B2 Miniature zoom lens 有权
标题翻译：微型变焦镜头
公开(公告)号：US08218244B2
公开(公告)日：2012-07-10
申请号：US12951307
申请日：2010-11-22
申请人： Shih-Mu Lin , Chao-Hung Lin , Sheng-Fang Cheng
发明人： Shih-Mu Lin , Chao-Hung Lin , Sheng-Fang Cheng
IPC分类号： G02B15/14
CPC分类号： G02B15/177 , G02B13/0045 , G02B13/009
摘要： A miniature zoom lens includes a first, a second and a third lens groups arranged along an optical axis and from an object side to an image side in sequence. The refractive powers of the three lens groups are negative, positive and positive, respectively. The first lens group is fixed at a predetermined position. The second lens group is movable along the optical axis in accordance with a change of magnification. The third lens group is movable along the optical axis for keeping an image plane fixed at an image sensor. The first lens group is in resting state and the second and the third lens groups are movable during zoom-in or zoom-out operation of the miniature zoom lens. In addition, the miniature zoom lens can be composed of at least seven pieces of lens, thus the cost is reduced, the manufacture is easy and the assembly is simple.
摘要翻译：微型变焦透镜包括沿着光轴并且从物体侧到像侧依次布置的第一透镜组，第二透镜组和第三透镜组。三个透镜组的折射力分别为负，正和正。第一透镜组固定在预定位置。第二透镜组可以根据放大率的变化沿光轴移动。第三透镜组可沿着光轴移动，以将图像平面固定在图像传感器上。第一透镜组处于静止状态，并且第二和第三透镜组在微型变焦透镜的放大或缩小操作期间是可移动的。此外，微型变焦透镜可以由至少七个透镜组成，因此成本降低，制造容易并且组装简单。

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