公开(公告)号：US12130410B2

公开(公告)日：2024-10-29

申请号：US17119545

申请日：2020-12-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Qinghua Zhao ,  Yoshio Matsumura

IPC: G02B13/00 ,  G02B9/64 ,  G02B13/08 ,  G02B27/00

CPC classification number: G02B13/0045 ,  G02B9/64 ,  G02B13/08 ,  G02B27/0025

Abstract: An imaging optical system has an image circle defined on an imaging element. The imaging optical system includes: lens elements arranged from an object side to an image plane side, and a diaphragm arranged between two of the lens elements. The lens elements include freeform lens elements, each having a freeform surface that is an asymmetrical surface with respect to a long side direction and a short side direction which cross with each other with a first diameter of the image circle in the long side direction being larger than a second diameter of the image circle in the short side direction. At least two of the freeform lens elements are located on an object side of the diaphragm. The imaging optical system satisfies a condition based on a summation for freeform surfaces of freeform lens elements located on the object side of the diaphragm.

公开(公告)号：US12072548B2

公开(公告)日：2024-08-27

申请号：US17387028

申请日：2021-07-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya Imaoka ,  Qinghua Zhao

IPC: G02B7/14 ,  G02B13/02 ,  G02B13/06 ,  G02B15/14 ,  G03B17/14

CPC classification number: G02B7/14 ,  G02B13/02 ,  G02B13/06 ,  G02B15/146 ,  G03B17/14

Abstract: The present embodiment discloses an interchangeable lens that can be detachably attached to an apparatus body having an image forming surface on which an image is formed, and the interchangeable lens has a magnification conjugate point on a magnification side and a reduction conjugate point on a reduction side. The interchangeable lens includes a focus lens group that can move along an optical axis to adjust a focus at the magnification conjugate point and a flange back distance correction lens group that can move along the optical axis to correct an error in a flange back distance of the interchangeable lens with respect to the image forming surface.

公开(公告)号：US11982800B2

公开(公告)日：2024-05-14

申请号：US17370196

申请日：2021-07-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya Imaoka ,  Qinghua Zhao

IPC: G02B15/14 ,  G02B13/00 ,  G02B13/18

CPC classification number: G02B15/145127 ,  G02B13/0095 ,  G02B13/18

Abstract: An optical system internally has an intermediate imaging position that is conjugated to a magnification conjugate point on a magnification side and a reduction conjugate point on a reduction side, respectively. The optical system includes a magnification optical system having a first lens element and a second lens element positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system having a plurality of lens elements, positioned on the reduction side with respect to the intermediate imaging position. The first lens element and the second lens element are positioned in this order from the magnification side, and the second lens element has a positive power. The optical system satisfies: 23

公开(公告)号：US12253659B2

公开(公告)日：2025-03-18

申请号：US17377776

申请日：2021-07-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Qinghua Zhao ,  Takuya Imaoka

IPC: G02B13/16 ,  G02B13/00 ,  G02B15/14 ,  G03B21/14

Abstract: The present disclosure is directed to an optical system internally having an intermediate imaging position that is conjugated to a magnification conjugate point on a magnification side and a reduction conjugate point on a reduction side, respectively, the optical system including: a magnification optical system having A (A is an integer of three or more) pieces of lens elements, positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system having B (B is an integer of two or more) pieces of lens elements, positioned on the reduction side with respect to the intermediate imaging position. A first lens group composed of β pieces (β is one or more and less than B) of lens elements positioned first from the magnification side in the relay optical system has a negative power.

公开(公告)号：US09746651B2

公开(公告)日：2017-08-29

申请号：US15070375

申请日：2016-03-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Qinghua Zhao ,  Yoshiyuki Hisatomi ,  Takuya Imaoka

IPC: G02B15/15 ,  G02B15/173 ,  G02B27/00

CPC classification number: G02B15/173 ,  G02B27/0025

Abstract: A zoom lens system according to the present disclosure includes, in order from an object side to an image plane side, a first lens group having positive optical power; a second lens group having negative optical power; a third lens group having positive optical power; and a subsequent lens group including a fourth lens group, a fifth lens group, and a sixth lens group. The first lens group comprises, in order from the object side, a first lens element having negative optical power; a second lens element having positive optical power; a third lens element having positive optical power; and a fourth lens element having positive optical power. The fifth lens group in the subsequent lens group has negative optical power. The first lens group is fixed with respect to the image plane in zooming from a wide-end to a tele-end upon image shooting.