公开(公告)号：US20140146397A1

公开(公告)日：2014-05-29

申请号：US14170024

申请日：2014-01-31

Applicant: FUJIFILM Corporation

Inventor： Shinkichi IKEDA ,  Yasutaka SHIMADA

IPC: G02B15/14

CPC classification number: G02B15/14 ,  G02B13/18 ,  G02B15/10 ,  G02B15/167 ,  G02B15/20

Abstract: A variable magnification optical system includes a relay lens group (a fifth lens group) substantially consisting of a relay front group and a relay rear group with a predetermined air space therebetween, and which is fixed during magnification change and has image formation action, and an extender lens group insertably and detachably arranged between the relay front group and the relay rear group, and which extends a focal length toward a telephoto side without changing an image formation position. The extender lens group substantially consists of a first lens group having positive refractive power and a second lens group having negative refractive power in this order from an object side. The second lens group is a cemented lens substantially consisting of a convex meniscus lens, a biconcave lens and a convex meniscus lens in this order from the object side.

Abstract translation: 可变放大率光学系统包括基本上由继电器前组和后继组组成的中继透镜组（第五透镜组），其间具有预定的空气间隔，并且在放大变化期间被固定并具有成像动作， 延伸透镜组可插入地且可拆卸地布置在继电器前组和继电器后组之间，并且将焦距延伸到远摄侧而不改变图像形成位置。 扩展透镜组基本上由具有正屈光力的第一透镜组和从物体侧开始依次具有负屈光力的第二透镜组构成。 第二透镜组是从物体侧起依次由凸弯月形透镜，双凹透镜和凸弯月形透镜构成的胶合透镜。

公开(公告)号：US20130258497A1

公开(公告)日：2013-10-03

申请号：US13903316

申请日：2013-05-28

Applicant: FUJIFILM Corporation

Inventor： Toshihiro AOI ,  Shinkichi IKEDA

IPC: G02B15/14

CPC classification number: G02B15/14 ,  G02B15/17 ,  G02B15/26

Abstract: A zoom lens consists of positive first lens group, which is fixed during changing magnification, negative second lens group, which is moved during changing magnification, negative third lens group for correcting a fluctuation of an image plane caused by changing magnification, and positive fourth lens group, which is fixed during changing magnification, which are in this order from an object side. The first lens group consists of negative lens and positive lens group consisting of three or less positive lenses in this order from the object side. Each of the negative lens and at least one of the positive lens or lenses in the first lens group has at least an aspherical surface. A predetermined formula is satisfied.

Abstract translation: 变焦透镜由变倍倍率下固定的正第一透镜组，变倍放大期间移动的负第二透镜组，用于校正由变化倍率引起的像平面波动的负第三透镜组，以及正第四透镜 组，其在变化放大期间被固定，其从物体侧开始依次排列。 第一透镜组由从物体侧起依次由三个或更少的正透镜组成的负透镜和正透镜组组成。 第一透镜组中的负透镜和正透镜中的至少一个具有至少一个非球面。 满足规定的公式。

公开(公告)号：US20220236543A1

公开(公告)日：2022-07-28

申请号：US17560235

申请日：2021-12-22

Applicant: FUJIFILM Corporation

Inventor： Shinkichi IKEDA ,  Daiki KOMATSU ,  Takashi KUNUGISE

IPC: G02B15/14 ,  G02B3/04

Abstract: The variable magnification optical system consists of, in order from an object side to an image side, a first lens group that has a positive refractive power, a plurality of lens groups, and a final lens group that has a positive refractive power. During changing magnification, a spacing between the first lens group and the lens group closest to the object side among the plurality of lens groups changes, all spacings between adjacent lens groups in the plurality of lens groups change, and a spacing between the lens group closest to the image side and the final lens group among the plurality of lens groups changes.

公开(公告)号：US20180299656A1

公开(公告)日：2018-10-18

申请号：US16012916

申请日：2018-06-20

Applicant: FUJIFILM Corporation

Inventor： Masaru YONEZAWA ,  Shinkichi IKEDA

IPC: G02B15/167 ,  G02B13/18 ,  G02B13/02

Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a positive refractive power and remains stationary during zooming, a plurality of movable lens groups that move during zooming, and a final lens group that has a positive refractive power and remains stationary during zooming. The first lens group consists of, in order from the object side, a first lens group front group that has a negative refractive power, a first lens group intermediate group that has a positive refractive power and moves during focusing, and a first lens group rear group that has a positive refractive power. The first lens group front group has, successively in order from a position closest to the object side, a negative meniscus lens concave toward an image side, and a negative lens concave toward the object side. The components of the zoom lens satisfy predetermined conditional expressions.

公开(公告)号：US20180299643A1

公开(公告)日：2018-10-18

申请号：US16014064

申请日：2018-06-21

Applicant: FUJIFILM Corporation

Inventor： Masaru YONEZAWA ,  Shinkichi IKEDA

IPC: G02B7/10 ,  G02B15/20 ,  G02B15/167 ,  G02B13/18

Abstract: Provided are a zoom lens which can be configured to have a small size while ensuring a high zoom ratio and has high optical performance by satisfactorily correcting chromatic aberration, and an imaging apparatus including the zoom lens. The zoom lens consists of, in order from the object side, a first lens group G1 that has a positive refractive power and remains stationary during zooming, a plurality of movable lens groups that move during zooming; and a final lens group Ge that has a positive refractive power and remains stationary during zooming. At least one movable lens group has a negative refractive power. The movable lens group, which is closest to the object side and has a negative refractive power, has two or more negative lenses, and satisfies predetermined conditional expressions.

公开(公告)号：US20150309292A1

公开(公告)日：2015-10-29

申请号：US14698051

申请日：2015-04-28

Applicant: FUJIFILM Corporation

Inventor： Toshihiro AOI ,  Shinkichi IKEDA

IPC: G02B15/14

CPC classification number: G02B15/14 ,  G02B15/173

Abstract: A zoom lens consists of a positive first lens group fixed during zooming, a negative second lens group moved during zooming, a positive third lens group moved during zooming to correct an image plane variation due to the zooming, and a positive fourth lens group fixed during zooming and includes a stop on the most object side. The second lens group includes two or more positive lenses and one or more negative lenses. The zoom lens satisfies predetermined conditional expressions with respect to the second lens group.

Abstract translation: 变焦镜头包括在变焦期间固定的正的第一透镜组，在变焦期间移动的负第二透镜组，在变焦期间移动的正的第三透镜组以校正由于变焦引起的图像平面变化，以及正的第四透镜组在 放大并在最物体侧包含一个停止点。 第二透镜组包括两个或更多个正透镜和一个或多个负透镜。 变焦透镜满足关于第二透镜组的预定条件表达式。

公开(公告)号：US20150092281A1

公开(公告)日：2015-04-02

申请号：US14565741

申请日：2014-12-10

Applicant: FUJIFILM Corporation

Inventor： Toshihiro AOI ,  Shinkichi IKEDA

IPC: G02B15/173 ,  G02B13/18

CPC classification number: G02B15/173 ,  G02B13/18

Abstract: The zoom lens substantially consists of a positive first lens group which is fixed while changing magnification, a negative second lens group which moves while changing magnification, a positive third lens group which moves while changing magnification, and a positive fourth lens group which is fixed while changing magnification in this order from the object side. The image formation magnification rates of the second lens group and the third lens group simultaneously pass a −1× point while changing magnification from the wide angle to the telephoto. The second lens group substantially consists of a negative second-a lens group and a positive second-b lens group which independently move while changing magnification in this order from the object side, and the third lens group substantially consists of a positive third-a lens group and a positive third-b lens group which independently move while changing magnification in this order from the object side.

Abstract translation: 变焦透镜基本上由变倍放大时固定的正的第一透镜组，在改变倍率时移动的负的第二透镜组，在改变倍率时移动的正的第三透镜组以及固定的正的第四透镜组 从物体侧以此顺序改变放大倍率。 第二透镜组和第三透镜组的图像形成倍率在从广角向远摄改变倍率的同时通过-1×点。 第二透镜组基本上由负的第二透镜组和正的第二b透镜组组成，其在从物体侧依次改变倍率的同时独立地移动，并且第三透镜组基本上由正的第三透镜组 组和正的第三-B透镜组，其在从物体侧按照该顺序改变放大率时独立地移动。

公开(公告)号：US20230112183A1

公开(公告)日：2023-04-13

申请号：US17819184

申请日：2022-08-11

Applicant: FUJIFILM Corporation

Inventor： Masaru YONEZAWA ,  Shinkichi IKEDA ,  Takashi KUNUGISE ,  Masanao KAWANA

IPC: G02B15/14 ,  G02B15/20

Abstract: The zoom lens consists of a first lens group, a front group, a middle group, and a rear group, in order from an object side. The first lens group has a positive refractive power and includes a negative lens and a positive lens, successively in order from a position closest to the object side to an image side. The front group consists of one or more lens groups that move during zooming and has a negative refractive power as a whole throughout an entire zoom range. The middle group includes only one lens group as a lens group. The rear group consists of a plurality of lens groups. An aperture stop is disposed between a lens surface closest to the image side in the front group and a lens surface closest to the object side in the rear group. The zoom lens satisfies predetermined conditional expressions.

公开(公告)号：US20210088765A1

公开(公告)日：2021-03-25

申请号：US17024941

申请日：2020-09-18

Applicant: FUJIFILM Corporation

Inventor： Shinkichi IKEDA

IPC: G02B15/14 ,  G02B15/167 ,  G02B15/20

Abstract: A zoom lens consists of, in order from an object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a positive fifth lens group. During zooming, the first lens group and the fifth lens group are not moved, and the second lens group, the third lens group, and the fourth lens group are moved. The second lens group includes a negative lens closest to the object side. In a case where a focal length of the second lens group is denoted by f2 and a focal length of the negative lens of the second lens group closest to the object side is denoted by f21, the zoom lens satisfies 0.6

公开(公告)号：US20180217359A1

公开(公告)日：2018-08-02

申请号：US15879460

申请日：2018-01-25

Applicant: FUJIFILM Corporation

Inventor： Takuya TANAKA ,  Shinkichi IKEDA

IPC: G02B9/60 ,  G02B13/02 ,  G02B15/14

CPC classification number: G02B9/60 ,  G02B13/02 ,  G02B15/14 ,  G02B15/173

Abstract: The zoom lens consists of, in order from an object side: a first lens group that remains stationary during zooming and has a positive refractive power; at least two movable lens groups that are moved during zooming; and a final lens group that remains stationary during zooming and has a positive refractive power. The final lens group consists of, in order from the object side, a front group and a rear group. The front group has, successively in order from a position closest to the object side, two or less positive lenses and one first front group negative lens, and a second front group negative lens that is different from the first front group negative lens at a position closest to an image side and is concave toward the image side. An aperture stop is provided between the movable lens group and the first front group negative lens. The rear group consists of a positive lens and a rear group negative meniscus lens that is convex toward the image side. In addition, the zoom lens satisfies predetermined conditional expressions.