公开(公告)号：US20110242677A1

公开(公告)日：2011-10-06

申请号：US12750268

申请日：2010-03-30

Applicant: SHI MU LIN ,  Lu-Hua Chen ,  Sheng Fang Cheng

Inventor： SHI MU LIN ,  Lu-Hua Chen ,  Sheng Fang Cheng

IPC: G02B15/14

CPC classification number: G02B15/173

Abstract: A zoom lens includes a first, a second, a third and a fourth lens groups that are arranged along an optical axis and from an object side to an image side in sequence. The refractive powers of the four lens groups are positive, negative, positive and positive, respectively. The first and the third lens groups are fixed at a fixed position. The second lens group is movable along the optical axis in accordance with the change of magnification. The fourth lens group is movable along the optical axis in accordance with keeping an image plane fixed at an image sensor. The present invention has at least four pieces of lens that are made of plastic material in order to decrease camera lens weight and move easily the lens groups. In addition, the present invention has small variation of aperture value, moderate zoom ratio and compact size at the same time.

Abstract translation: 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，第二，第三和第四透镜组。 四个透镜组的折射力分别为正，负，正和正。 第一和第三透镜组固定在固定位置。 第二透镜组可以根据放大率的变化沿光轴移动。 根据将图像平面固定在图像传感器上，第四透镜组可沿光轴移动。 本发明具有由塑料材料制成的至少四片透镜，以便降低相机镜头重量并容易地移动透镜组。 此外，本发明同时具有小的孔径值变化，中等变焦比和紧凑尺寸。

公开(公告)号：US08054560B2

公开(公告)日：2011-11-08

申请号：US12750268

申请日：2010-03-30

Applicant: Shi Mu Lin ,  Lu-Hua Chen ,  Sheng Fang Cheng

Inventor： Shi Mu Lin ,  Lu-Hua Chen ,  Sheng Fang Cheng

IPC: G02B15/14

CPC classification number: G02B15/173

Abstract: A zoom lens includes a first, a second, a third and a fourth lens groups that are arranged along an optical axis and from an object side to an image side in sequence. The refractive powers of the four lens groups are positive, negative, positive and positive, respectively. The first and the third lens groups are fixed at a fixed position. The second lens group is movable along the optical axis in accordance with the change of magnification. The fourth lens group is movable along the optical axis in accordance with keeping an image plane fixed at an image sensor. The present invention has at least four pieces of lens that are made of plastic material in order to decrease camera lens weight and move easily the lens groups. In addition, the present invention has small variation of aperture value, moderate zoom ratio and compact size at the same time.

Abstract translation: 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，第二，第三和第四透镜组。 四个透镜组的折射力分别为正，负，正和正。 第一和第三透镜组固定在固定位置。 第二透镜组可以根据放大率的变化沿光轴移动。 根据将图像平面固定在图像传感器上，第四透镜组可沿光轴移动。 本发明具有由塑料材料制成的至少四片透镜，以便降低相机镜头重量并容易地移动透镜组。 此外，本发明同时具有小的孔径值变化，中等变焦比和紧凑尺寸。