公开(公告)号：US10012822B2

公开(公告)日：2018-07-03

申请号：US15419143

申请日：2017-01-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro Kitada ,  Shunichiro Yoshinaga ,  Takakazu Bito

IPC: G02B27/64 ,  G02B15/14 ,  G02B15/163 ,  G02B15/20 ,  G02B15/22

CPC classification number: G02B15/163 ,  G02B15/173 ,  G02B15/20 ,  G02B15/22 ,  G02B27/646

Abstract: The zoom lens system includes a first lens group with positive power, a second lens group with negative power, a third lens group with positive power, a fourth lens group with negative power, and a fifth lens group with positive power. An aperture stop is provided between the second and the third lens groups. The third lens group includes lens element L3a and L3b with positive power, lens element L3c with negative power, and lens element L3d with positive power. The lens elements L3c and L3d are cemented. The lens element L3b corrects image blurring. The fourth lens group moves when focusing. When zooming, the first to the fourth lens group move.Here, condition (1) below is satisfied. 0.24

公开(公告)号：US09841586B2

公开(公告)日：2017-12-12

申请号：US15233146

申请日：2016-08-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shunichiro Yoshinaga

IPC: G02B9/00 ,  G02B13/26 ,  G02B27/00 ,  G02B5/00 ,  G02B9/64 ,  G02B13/18 ,  G02B7/14

CPC classification number: G02B13/26 ,  G02B5/005 ,  G02B7/14 ,  G02B9/64 ,  G02B13/02 ,  G02B13/18 ,  G02B27/0025

Abstract: A single focal length lens system includes, in order from an object side to an image side, a first lens unit having positive optical power and a second lens unit including a lens element that moves in a direction of an optical axis with respect to an image surface in focusing from an infinity in-focus condition to a close-object in-focus condition. The first lens unit includes an aperture diaphragm and a lens element A located on the object side of the aperture diaphragm. A lens element B having positive optical power and a lens element C having negative optical power are located on the image side of the aperture diaphragm. Abbe numbers of the lens elements A, B, and C to the d-line and partial dispersion ratios of the lens elements A, B, and C for the g-line and the F-line satisfy a predetermined relation.

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

公开(公告)号：US09939609B2

公开(公告)日：2018-04-10

申请号：US15408570

申请日：2017-01-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shunichiro Yoshinaga

IPC: G02B9/04 ,  G02B15/14 ,  G02B7/105 ,  H04N5/225 ,  H04N5/232 ,  G02B13/00 ,  G02B9/64

CPC classification number: G02B7/105 ,  G02B9/64 ,  G02B13/006 ,  H04N5/2253 ,  H04N5/2254 ,  H04N5/23293

Abstract: A lens system in the present disclosure includes: a first lens group that is moved toward an image side along an optical axis in focusing from a far-object in-focus state to a near-object in-focus state, and has positive optical power; and a second lens group that is disposed on the image side relative to the first lens group and has optical power. The lens system satisfies the following conditions (1) and (2). 0.5

公开(公告)号：US10338361B2

公开(公告)日：2019-07-02

申请号：US15936518

申请日：2018-03-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shunichiro Yoshinaga ,  Hiroaki Suzuki ,  Yoshiaki Kurioka

IPC: G02B15/17 ,  G02B15/177

Abstract: An imaging optical system includes, in order from an object side to an image side, a first lens group having negative optical power, a second lens group having positive optical power, a third lens group having negative optical power, and a fourth lens group with negative optical power. A lens disposed closest to the object side in the second lens group has a concave surface directed toward the object side, and a lens disposed closest to the object side in the fourth lens group has positive optical power. Each distance between the lens groups changes when zooming from a wide-angle end to a telephoto end on photographing.