公开(公告)号：US11275235B2

公开(公告)日：2022-03-15

申请号：US16880289

申请日：2020-05-21

Applicant: CANON KABUSHIKI KAISHA

Inventor： Akihiko Yuki

IPC: G02B15/14 ,  H04N5/225 ,  G02B15/173 ,  G02B15/17

Abstract: Provided is a zoom lens consisting of, in order from an object side to an image side: a positive front lens unit configured not to move for zooming; a plurality of magnification-varying lens units including two magnification-varying lens units having negative refractive powers configured to move for zooming; and a positive rear lens unit configured not to move for zooming, in which a focal length of the front lens unit, a focal length of a magnification-varying lens unit having a negative refractive power and arranged closest to the object side in the plurality of magnification-varying lens units, a focal length of a magnification-varying lens unit having a negative refractive power and arranged closest to the image side in the plurality of magnification-varying lens units, and a focal length of the rear lens unit are suitably set.

公开(公告)号：US11137585B2

公开(公告)日：2021-10-05

申请号：US16530985

申请日：2019-08-02

Applicant: AAC Technologies Pte. Ltd.

Inventor： Jie Ma

IPC: G02B13/00 ,  G02B15/17 ,  G03B11/04 ,  G02B7/02 ,  G03B19/02 ,  G03B30/00 ,  G03B17/02 ,  G02B13/16 ,  G03B19/14 ,  G03B17/12 ,  G02B7/00

Abstract: A lens module is provided, including: a lens barrel including first and second barrel walls; and a set of lenses received in the lens barrel and including at least a first lens and a second lens arranged from an object side to an image side. The first lens includes a first optical portion and a first peripheral portion surrounding the first optical portion. A surface of the first barrel wall close to the image side includes a first planar surface extending horizontally towards an optical axis from a position where the first barrel wall is connected to the second barrel wall; a first oblique surface extending obliquely from the first planar surface towards the optical axis and towards the image side; and a second planar surface extending horizontally from the first oblique surface towards the optical axis.

公开(公告)号：US10976529B2

公开(公告)日：2021-04-13

申请号：US16133511

申请日：2018-09-17

Applicant: FUJIFILM Corporation

Inventor： Yasutaka Shimada ,  Michio Cho

IPC: G02B15/14 ,  G02B15/16 ,  G02B27/00 ,  G02B15/173 ,  G02B15/17

Abstract: The variable magnification optical system includes, in order from an object side, a positive first lens group disposed at a position closest to the object side, a variable magnification lens group which is disposed at a position closest to the object side among negative lens groups and moves during changing magnification, an intermediate group including at least one lens group, and a positive final lens group which is disposed at a position closest to the image side. The variable magnification lens group, the intermediate group, and the final lens group are continuously disposed. The variable magnification optical system includes at least one LA lens. This LA lens satisfies predetermined conditional expressions relating to a refractive index, an Abbe number, and a partial dispersion ratio, and is located from the variable magnification lens group to the intermediate group.

公开(公告)号：US20210072522A1

公开(公告)日：2021-03-11

申请号：US16889739

申请日：2020-06-01

Applicant: Navitar, Inc.

Inventor： Chad Byler

IPC: G02B13/24 ,  G02B21/02 ,  G02B25/00 ,  G02B21/36 ,  G02B15/14 ,  G02B27/00 ,  G02B15/16 ,  G02B15/17 ,  G02B23/12 ,  G02B15/22 ,  G02B27/10

Abstract: A finite conjugate lens assembly with modular interchangeable components includes a zooming component that includes three independently movable lens groups that are disposed within the lens assembly between a pair of static lens groups. The lens assembly exhibits an etendue of between 0.95 and 4.65 mm2sr.

公开(公告)号：US10670845B2

公开(公告)日：2020-06-02

申请号：US15889520

申请日：2018-02-06

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kazuya Shimomura

IPC: G02B15/14 ,  G02B9/60 ,  G02B15/17

Abstract: A zoom lens includes in order from an object side: a positive first lens unit not moving for zooming; a negative second lens unit moving for zooming; a negative third lens unit moving for zooming; an intermediate lens group including a lens unit and moving for zooming; and a rear lens group including a lens unit, a lens unit, closest to an object of the zoom lens, not moving for zooming, an aperture stop being placed on a side of the object to or in the rear lens group, a distances between each pair of adjacent lens units changes for zooming, and a distance between the second and third lens units at a wide angle end, a distance between the second and third lens units at a telephoto end, and a maximum distance between the second and third lens units in a certain zoom range are appropriately set.

公开(公告)号：US10571784B2

公开(公告)日：2020-02-25

申请号：US15557165

申请日：2016-03-02

Applicant: SEIKO EPSON CORPORATION

Inventor： Takuya Hatano ,  Naoto Takehana

IPC: G03B21/14 ,  G02B15/163 ,  G02B15/20 ,  G02B27/14 ,  G02B7/02 ,  G02B7/10 ,  G03B21/28 ,  G03B21/20 ,  G03B21/00 ,  H04N9/31 ,  G02B15/17

Abstract: A projection optical device includes a fourth lens group movable along an optical axis, a fifth lens group provided in a position maintained within the projection optical device, a fourth lens frame holding the fourth lens group and having cam pins, a guide tube having a rectilinear groove, the cam pins inserted into the rectilinear groove, and a cam tube rotated with respect to the guide tube to guide the cam pins with the rectilinear groove and the cam groove, and moving the fourth lens frame along the optical axis, wherein the cam pins are formed on an upstream side in an optical path of the fourth lens group in a direction along the optical axis, and the fifth lens group is provided on the upstream side in the optical path of the fourth lens group.

公开(公告)号：US10379272B2

公开(公告)日：2019-08-13

申请号：US15910261

申请日：2018-03-02

Applicant: CANON KABUSHIKI KAISHA

Inventor： Hiroto Yasui

IPC: G02B5/18 ,  G02B27/64 ,  G02B13/02 ,  G02B13/00 ,  G02B15/17 ,  G02B27/42

Abstract: Provided is an optical system including a front unit, an aperture stop and a rear unit which are arranged in order from an object side to an image side. The front unit includes a diffractive optical element, at least one first refractive optical element having a power in the same sign as a sign of a power at a diffractive surface of the diffractive optical element, and at least one second refractive optical element having a power in a different sign from the sign of the power at the diffractive surface. A partial dispersion ratio between a d-line and a C-line and a partial dispersion ratio between a g-line and the d-line of the at least one first refractive optical element and the at least one second refractive optical element are appropriately set.

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：US20190204566A1

公开(公告)日：2019-07-04

申请号：US16333922

申请日：2017-09-18

Applicant: Leica Camera AG

Inventor： Dietmar STUIBLE ,  Sigrun KAMMANS

IPC: G02B13/04 ,  G02B15/17 ,  G02B27/00 ,  G02B9/60 ,  G02B13/18

CPC classification number: G02B13/04 ,  G02B9/60 ,  G02B13/18 ,  G02B15/17 ,  G02B27/0075

Abstract: A lens with a fixed focal length comprising including a first front lens-element group, a second lens-element group, a third lens-element group, a fourth lens-element group, and a fifth back lens-element group. Relative to an imaging plane in a lens barrel and both the focusing front group and the focusing back group are movable jointly relative to one another and to the lens-element groups arranged in a stationary manner in order to focus the lens on objects at different object distances. The front lens-element group has a positive refractive power and the central group and the back lens-element group have a negative refractive power.

公开(公告)号：US10295806B2

公开(公告)日：2019-05-21

申请号：US15297617

申请日：2016-10-19

Applicant: CANON KABUSHIKI KAISHA

Inventor： Nobuyuki Miyazawa ,  Tomoyuki Nakamura ,  Naotoshi Ogawa ,  Kazuya Shimomura

IPC: G02B15/14 ,  G02B15/173 ,  G02B15/177 ,  G02B15/20 ,  G02B15/16 ,  G02B15/17 ,  G02B15/24 ,  G02B9/60 ,  G02B9/62 ,  G02B5/00 ,  G02B27/64 ,  G02B7/04

Abstract: A zoom lens, includes, in order from object side: a front unit including a unit including a first unit arranged closest to the object side and not moving for zooming; an Nf unit including three or more lenses and having a negative refractive power; an stop; a first rear unit moving during zooming; a second rear unit moving during zooming; and a third rear unit not moving for zooming, in which: the front unit includes four or more lenses and includes one or more units having a positive refractive power; and a difference between positions of the first rear unit at a wide angle end and a telephoto end, a difference between positions of the second rear unit at the wide angle end and the telephoto end, a focal length of the second rear unit, and a focal length of the zoom at the wide angle end are appropriately set.