公开(公告)号：US20200278521A1

公开(公告)日：2020-09-03

申请号：US16878599

申请日：2020-05-19

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/20 ,  G02B15/173 ,  G02B27/64 ,  G03B13/36

Abstract: A variable magnification optical system is provided which includes, in order from an object side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4, and a subsequent lens group GR. Upon zooming, each of distances between the first lens group G1 and the second lens group G2, between the second lens group G2 and the third lens group G3, between the third lens group G3 and the fourth lens group G4, between the fourth lens group G4 and the subsequent lens group GR is varied, and upon focusing, the third lens group G3 is moved along an optical axis. A predetermined condition is satisfied. Consequently, the optical system enables a focusing lens group to be downsized and made light and also enables high speed auto focusing and quietness upon auto focusing to be realized without increasing the size of a barrel. Variation in aberration upon zooming from a wide-angle end state to a telephoto end state and variation in aberration upon focusing from an infinite distance object to a close distance object are well suppressed. Also, an optical apparatus and a method for manufacturing the variable magnification optical system are provided.

公开(公告)号：US20180373002A1

公开(公告)日：2018-12-27

申请号：US15778259

申请日：2016-11-28

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/15 ,  G02B9/04 ,  G02B13/06

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) having 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 having positive refractive power and is disposed closest to the object. A following conditional expression is satisfied: 0.85

公开(公告)号：US20180341091A1

公开(公告)日：2018-11-29

申请号：US15778258

申请日：2016-11-28

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/14 ,  G02B13/06 ,  G02B13/02 ,  G02B27/00

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 intermediate group (GM) includes a partial group satisfying following conditional expressions: 1.4

公开(公告)号：US20180307011A1

公开(公告)日：2018-10-25

申请号：US15576827

申请日：2016-05-26

Applicant: NIKON CORPORATION

Inventor： Takeru UEHARA ,  Takeshi SUZUKI ,  Kosuke MACHIDA

IPC: G02B15/177 ,  G02B13/18 ,  G02B27/64 ,  G02B15/20

CPC classification number: G02B15/177 ,  G02B13/18 ,  G02B15/20 ,  G02B27/646

Abstract: A variable magnification optical system comprising, in order from an object side, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, a third lens group G3 having negative refractive power and a rear group comprising at least one lens group and having positive refractive power as a whole; upon varying magnification, air intervals between the neighboring lens groups being varied; and said first lens group G1 consisting of lens component(s) having negative refractive power, thereby a variable magnification optical system having excellent optical performance, an optical apparatus and a method for manufacturing the variable magnification optical system, being provided.

公开(公告)号：US20170184828A1

公开(公告)日：2017-06-29

申请号：US15418773

申请日：2017-01-29

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/20 ,  G02B15/173 ,  H04N5/225 ,  G02B15/14

CPC classification number: G02B15/20 ,  G02B5/005 ,  G02B13/009 ,  G02B13/04 ,  G02B13/18 ,  G02B15/14 ,  G02B15/15 ,  G02B15/16 ,  G02B15/167 ,  G02B15/173 ,  G02B15/177 ,  G02B27/0025 ,  G02B27/646 ,  H04N5/225

Abstract: Composing, in order from an object side, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power and at least one lens group G3; upon varying magnification, a distance between the first lens group G1 and the second lens group G2, a distance between the second lens group G2 and a lens group G3 at an image side of the second lens group G2 and adjacent thereto, being varied; and a given conditional expression being satisfied; thereby providing a variable magnification optical system having a superb optical performance upon focusing, an optical device and a method for manufacturing the variable magnification optical system.

公开(公告)号：US20240184087A1

公开(公告)日：2024-06-06

申请号：US18437465

申请日：2024-02-09

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

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

CPC classification number: G02B15/144105 ,  G02B15/20 ,  G02B27/646

Abstract: A variable magnification optical system comprises, in order from an object side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power and a fourth lens group G4 having negative refractive power; upon varying a magnification, a distance between the first lens group G1 and the second lens group G2 being varied, a distance between the second lens group G2 and the third lens group G3 being varied, and a distance between the third lens group G3 and the fourth lens group G4 being varied; upon focusing, the fourth lens group G4 being moved; and a predetermined conditional expression being satisfied. With such a configuration, there is provided a variable magnification optical system whose focusing lens group is compact in size and reduced in weight, so high speed and quiet focusing can be effected without lens barrel being made large in size, and further by which variations in aberrations upon varying magnification from the wide angle end state to the telephoto end state as well as variations in aberrations upon focusing from the infinite distance object to the close distance object can be superbly suppressed.

公开(公告)号：US20240151953A1

公开(公告)日：2024-05-09

申请号：US18413590

申请日：2024-01-16

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/14 ,  G02B15/20 ,  G02B27/00

CPC classification number: G02B15/144113 ,  G02B15/20 ,  G02B27/0025

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, a fourth lens group (G4) having a positive refractive power and a succeeding lens group (GR). In the zoom optical system, upon zooming, distances between adjacent lens groups change, and the succeeding lens group (GR) includes a plurality of focusing lens groups that have positive refractive powers and move upon focusing.

公开(公告)号：US20230359003A1

公开(公告)日：2023-11-09

申请号：US18219907

申请日：2023-07-10

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：US20220317424A1

公开(公告)日：2022-10-06

申请号：US17595849

申请日：2020-05-27

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

IPC: G02B15/14 ,  G02B13/18 ,  G02B15/20

Abstract: A variable power optical system (ZL (1)) includes a plurality of lens groups (G1-G7). During variable magnification, an interval between adjacent lens groups changes. The plurality of lens groups include: a first focusing lens group (G5) that moves during focusing; and a second focusing lens group (G6) that is disposed more toward an imaging surface side than the first focusing lens group and that moves along a different trajectory than the first focusing lens group during focusing. The first focusing lens group and the second focusing lens group both have a negative refractive power. The plurality of lens groups satisfy the following condition: 0.40

公开(公告)号：US20220171175A1

公开(公告)日：2022-06-02

申请号：US17673244

申请日：2022-02-16

Applicant: Nikon Corporation

Inventor： Kosuke MACHIDA

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

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