公开(公告)号：US20140085732A1

公开(公告)日：2014-03-27

申请号：US14092748

申请日：2013-11-27

Applicant: NIKON CORPORATION

Inventor： Satoru SHIBATA ,  Takeshi SUZUKI ,  Hiroshi YAMAMOTO

IPC: G02B13/04

CPC classification number: G02B13/04 ,  G02B13/18 ,  G02B15/14 ,  G02B15/177 ,  G02B27/646

Abstract: Providing a zoom lens system having excellent optical performance with a high zoom ratio, an imaging apparatus, and a method for zooming the zoom lens system. The system including, in order from an object, a first group G1 having negative refractive power, a second group G2 having positive refractive power, a third group G3 having negative refractive power, and a fourth group G4 having positive refractive power. An aperture stop S is disposed between the second group G2 and the fourth group G4. Upon zooming from a wide-angle end state to a telephoto end state, each group is moved such that a distance between the second group G2 and the third group G3 increases, a distance between the third group G3 and the fourth group G4 decreases, and the aperture stop S is moved together with the third group G3. Given conditions are satisfied.

Abstract translation: 提供具有高变焦比的优异光学性能的变焦透镜系统，成像装置和用于变焦变焦透镜系统的变焦方法。 该系统从物体起依次包括具有负折光力的第一组G1，具有正屈光力的第二组G2，具有负折光力的第三组G3和具有正屈光力的第四组G4。 孔径光阑S设置在第二组G2和第四组G4之间。 在从广角端状态变焦到望远端状态时，各组移动使得第二组G2和第三组G3之间的距离增加，第三组G3和第四组G4之间的距离减小，并且 孔径光阑S与第三组G3一起移动。 给定条件满意。