公开(公告)号：US20240427128A1

公开(公告)日：2024-12-26

申请号：US18806418

申请日：2024-08-15

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/173 ,  G02B9/14 ,  G02B15/14 ,  G02B15/20 ,  G02B27/64

Abstract: A zoom optical system (ZL) comprises, in order from an object: a first lens group (G1) having a positive refractive power; a second lens group (G2) having a negative refractive power; a third lens group (G3) having a positive refractive power; and a subsequent lens group (GR), wherein upon zooming, a distance between the first lens group (G1) and the second lens group (G2) changes, a distance between the second lens group (G2) and the third lens group (G3) changes, and a distance between the third lens group (G3) and the subsequent lens group (GR) changes, the subsequent lens group (GR) comprises a focusing lens group that moves upon focusing, and the second lens group (G2) comprises a partial group that satisfies following conditional expressions, 1.40

公开(公告)号：US20240361582A1

公开(公告)日：2024-10-31

申请号：US18768299

申请日：2024-07-10

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/14 ,  G02B15/16

CPC classification number: G02B15/144105 ,  G02B15/16

Abstract: A zoom optical system comprises, in order from an object: a front lens group (GFS) having a positive refractive power; an M1 lens group (GM1) having a negative refractive power; an M2 lens group (GM2) having a positive refractive power; and an RN lens group (GRN) having a negative refractive power, wherein upon zooming, distances between the front lens group and the M1 lens group, between the M1 lens group and the M2 lens group, and between the M2 lens group and the RN lens group change, upon focusing from an infinite distant object to a short distant object, the RN lens group moves, and the M2 lens group comprises an A lens group that satisfies a following conditional expression, 1.10

公开(公告)号：US20230273415A1

公开(公告)日：2023-08-31

申请号：US18018036

申请日：2021-06-25

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/14 ,  G02B15/16

CPC classification number: G02B15/1461 ,  G02B15/16

Abstract: A variable-magnification optical system (ZL) has a front-side lens group (GA) having a positive refractive power, a first intermediate lens group (GM1) having a negative refractive power, a second intermediate lens group (GM2) having a positive refractive power, and a succeeding lens group (GR), the succeeding lens group (GR) including a plurality of focusing lens groups that move along the optical axis during focusing, and satisfying the following conditions: −0.37

公开(公告)号：US20230266575A1

公开(公告)日：2023-08-24

申请号：US18083482

申请日：2022-12-17

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/20 ,  G02B13/18 ,  G02B15/22

CPC classification number: G02B15/20 ,  G02B13/18 ,  G02B15/22 ,  G02B13/009

Abstract: A variable magnification optical system comprising, in order from an object side, a first lens group having negative refractive power, a first intermediate lens group having positive refractive power, a second intermediate lens group having negative refractive power and a rear lens group; upon varying a magnification from a wide angle end state to a telephoto end state, a distance between the first lens group and the first intermediate lens group being varied, a distance between the first intermediate lens group and the second intermediate lens group being varied, and a distance between the second intermediate lens group and the rear lens group being varied; the rear lens group comprising at least one focusing lens group which is moved upon carrying out focusing from an infinitely distant object to a closely distant object; and predetermined conditional expressions being satisfied, thereby the focusing lens group(s) being reduced in weight.

公开(公告)号：US20210033834A1

公开(公告)日：2021-02-04

申请号：US16496446

申请日：2017-04-05

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/14 ,  G02B15/163 ,  G02B13/18 ,  G02B15/177

Abstract: A variable magnification optical system comprising, in order from an object side, a first lens group having negative refractive power, a first intermediate lens group having positive refractive power, a second intermediate lens group having negative refractive power and a rear lens group; upon varying a magnification from a wide angle end state to a telephoto end state, a distance between the first lens group and the first intermediate lens group being varied, a distance between the first intermediate lens group and the second intermediate lens group being varied, and a distance between the second intermediate lens group and the rear lens group being varied; the rear lens group comprising at least one focusing lens group which is moved upon carrying out focusing from an infinitely distant object to a closely distant object; and predetermined conditional expressions being satisfied, thereby the focusing lens group(s) being reduced in weight.

公开(公告)号：US20200310087A1

公开(公告)日：2020-10-01

申请号：US16900321

申请日：2020-06-12

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/173 ,  G02B27/64 ,  G02B15/20

Abstract: A variable magnification optical system includes a positive first lens group disposed at a most object side, a negative intermediate group disposed at an image side of the first lens group, a positive focusing group disposed at an image side of the intermediate group, and a positive image side group disposed at an image side of the focusing group. Upon varying magnification, a distance between the first lens group and the intermediate group, a distance between the intermediate group and the focusing group and a distance between the focusing group and the image side group are varied; and the image side group includes, in order from an object side, a positive A group, a negative B group satisfying a predetermined conditional expression with respect to the A group, and a C group, whereby excellent optical performance, high speed focusing, and other advantages are achieved.

公开(公告)号：US20180348476A1

公开(公告)日：2018-12-06

申请号：US15777910

申请日：2016-11-28

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B9/10 ,  G02B15/20 ,  G02B15/16

CPC classification number: G02B15/20

Abstract: A zoom optical system comprises, in order from an object: a first lens group (G1) having positive refractive power; a second lens group (G2) having negative refractive power; and a subsequent group (GR) including at least one lens group. Upon zooming, distances between the first lens group (G1) and the second lens group (G2) and between the second lens group (G2) and the subsequent group (GR) change. The subsequent group (GR) comprises a focusing group (Gfc) having negative refractive power for focusing. The first lens group (G1) comprises a 1-1st lens that has positive refractive power and is disposed closest to the object. A following conditional expression is satisfied: 0.20

公开(公告)号：US20180341092A1

公开(公告)日：2018-11-29

申请号：US15778253

申请日：2016-11-28

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/163 ,  G02B13/02 ,  G02B13/18 ,  G02B27/64

Abstract: A zoom optical system (ZL) comprises, in order from an object: a first lens group (G1) having positive refractive power; an intermediate group (GM) including at least one lens group and having negative refractive power as a whole; an intermediate side lens group (GRP1) having positive refractive power; a subsequent side lens group (GRP2) having positive refractive power; and a subsequent group (GR) including at least one lens group. The subsequent side lens group (GRP2) moves upon focusing. A following conditional expression is satisfied: 2.5

公开(公告)号：US20180259753A1

公开(公告)日：2018-09-13

申请号：US15760749

申请日：2016-09-16

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/20 ,  G02B27/64

Abstract: Comprising a positive first lens group G1 disposed at a most object side, a negative intermediate group G2 disposed at an image side of the first lens group G1, a positive focusing group G3 disposed at an image side of the intermediate group G2, the focusing group G3 being moved upon focusing, and a positive image side group G4 disposed at an image side of the focusing group G3; upon varying magnification, a distance between the first lens group G1 and the intermediate group G2, a distance between the intermediate group G2 and the focusing group G3 and a distance between the focusing group G3 and the image side group G4 being varied; and a predetermined conditional expression being satisfied. Whereby a variable magnification optical system having excellent optical performance and a focusing lens group reduced in weight in order to attain high speed focusing operation, and others are provided.

公开(公告)号：US20240255742A1

公开(公告)日：2024-08-01

申请号：US18290407

申请日：2022-03-02

Applicant: NIKON CORPORATION

Inventor： Takuro ONO ,  Kosuke MACHIDA ,  Ayumu MAKIDA ,  Keisuke TSUBONOYA

IPC: G02B15/14 ,  G02B15/20

CPC classification number: G02B15/1461 ,  G02B15/20

Abstract: A variable magnification optical system including a plurality of lens groups, which is six or more lens groups and comprises a first lens group having positive refractive power and a rear group disposed closer to an image side than the first lens group, is configured so that at varying magnification the distances between the lens groups are varied, the first lens group consists of two or fewer lenses, and both the following conditional expressions are satisfied:


7.50