公开(公告)号：US10353184B2

公开(公告)日：2019-07-16

申请号：US15682547

申请日：2017-08-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yasuto Suzuki ,  Genki Nakazawa

IPC: G02B15/163 ,  G02B15/17

Abstract: A zoom lens system is an optical system that includes, in order from an object side to an image side, a first lens group having one first lens element with positive optical power, a second lens group having one second lens element with negative optical power, a third lens group with negative optical power, and a subsequent lens group including at least two lens groups. When zooming, distances between the lens groups change, and condition: 1.65

公开(公告)号：US12061376B2

公开(公告)日：2024-08-13

申请号：US17280030

申请日：2020-01-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shunichiro Yoshinaga ,  Yasuto Suzuki

IPC: G02B15/14 ,  G02B7/14 ,  G02B7/28

CPC classification number: G02B7/282 ,  G02B7/14 ,  G02B15/1461

Abstract: An imaging optical system includes: a front group having positive power; an aperture stop; a single lens Fn arranged adjacent to the aperture stop and having negative power; and a rear group having power. The front group includes: a first lens having positive power; a second lens having negative power; and a lens LG1R having positive power. The rear group includes a lens LGnR having negative power and located closest to the image. While focusing to make a transition from an infinity in-focus state to a close-object in-focus state, neither the front group nor the rear group moves but the single lens Fn moves along an optical axis toward the image. The imaging optical system satisfies the inequality: 0.38