公开(公告)号：US20130222925A1

公开(公告)日：2013-08-29

申请号：US13777324

申请日：2013-02-26

Applicant: PENTAX RICOH IMAGING COMPANY, LTD.

Inventor： Tatsuyuki ONOZAKI ,  Masakazu SAORI

IPC: G02B13/00

CPC classification number: G02B13/0055 ,  G02B7/105 ,  G02B13/24 ,  G02B27/646 ,  G03B2205/0015

Abstract: A close-distance correcting lens system includes a positive first lens group and a negative second lens group, wherein traveling distances of the first lens group and the second lens group toward the object side differ from each other when carrying out a focusing operation on an object at infinity to an object at a close distance. The first lens group includes a positive first sub lens group, a negative second sub lens group, a diaphragm, and a positive third sub lens group, in that order from the object side. The second sub lens group includes an image-stabilizing lens group which is arranged to move in a direction orthogonal to the optical axis to change an imaging position of the object image to thereby correct any image shake of the object image.

Abstract translation: 近距离校正透镜系统包括正的第一透镜组和负的第二透镜组，其中当对对象进行聚焦操作时，第一透镜组和第二透镜组朝向物体侧的行进距离彼此不同 在无限远到近距离的物体。 第一透镜组从物体侧依次包括正的第一子透镜组，负的第二子透镜组，光圈和正的第三子透镜组。 第二子透镜组包括图像稳定透镜组，其被布置成在与光轴正交的方向上移动以改变对象图像的成像位置，从而校正对象图像的任何图像抖动。