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公开(公告)号：US09606337B2
公开(公告)日：2017-03-28
申请号：US14730442
申请日：2015-06-04
Applicant: FUJIFILM Corporation
Inventor： Shinkichi Ikeda , Yasutaka Shimada
IPC: G02B15/14 , G02B15/173
CPC classification number: G02B15/173
Abstract: A zoom lens consists of five lens groups including, in order from the object side, positive, negative, positive, positive, and positive lens groups. During magnification change, the first and fifth lens groups are fixed relative to the image plane, and the second, third, and fourth lens groups are moved to change distances therebetween. During magnification change from the wide-angle end to the telephoto end, the second lens group is moved from the object side toward the image plane side, and the fourth lens group is moved from the image plane side toward the object side. The fifth lens group includes at least two negative lenses, and satisfies the condition expression (1) below: 1.90
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公开(公告)号：US09229202B2
公开(公告)日：2016-01-05
申请号：US14170024
申请日：2014-01-31
Applicant: FUJIFILM Corporation
Inventor： Shinkichi Ikeda , Yasutaka Shimada
IPC: G02B15/14 , G02B15/10 , G02B13/18 , G02B15/167 , G02B15/20
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。
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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.
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公开(公告)号：US10852535B2
公开(公告)日：2020-12-01
申请号：US16133038
申请日：2018-09-17
Applicant: FUJIFILM Corporation
Inventor： Yukiko Nagatoshi , Shunsuke Miyagishima , Kazuyoshi Okada , Ukyo Tomioka , Masaru Yonezawa , Yasutaka Shimada
IPC: G02B27/00 , G02B13/00 , G02B9/64 , G02B13/04 , G02B15/177
Abstract: The imaging lens includes at least one negative lens that satisfies predetermined Conditional Expressions (1) to (3) indicating conditions in which dispersion is relatively low and refractive index is high while having a negative rate of change of the refractive index. A positive lens having a largest Abbe number at the d line among positive lenses included in the imaging lens satisfies predetermined Conditional Expressions (4) and (5).
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公开(公告)号：US10527827B2
公开(公告)日：2020-01-07
申请号：US15843061
申请日：2017-12-15
Applicant: FUJIFILM Corporation
Inventor： Yasutaka Shimada , Taiga Noda
IPC: G02B15/14 , G02B27/00 , G02B13/02 , G02B15/167
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 second lens group that moves during zooming, and a subsequent lens group. The first lens group has a negative lens at a position closest to the object side. The subsequent lens group has, successively in order from a position closest to the image side, a final positive lens group that remains stationary during zooming, a positive lens group that moves during zooming, a stop, and a negative lens group that moves during zooming. The stop moves integrally with the positive lens group during zooming. The stop first moves to the object side, and reversely moves during zooming from the wide-angle end to the telephoto end. Predetermined conditional expressions are satisfied.
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Patent Agency Ranking
公开(公告)号：US09423596B2
公开(公告)日：2016-08-23
申请号：US14735376
申请日：2015-06-10
Applicant: FUJIFILM Corporation
Inventor： Yasutaka Shimada
Abstract: A retrofocus-type wide-angle lens consists of a negative first lens-group, a positive second lens-group, and a positive third lens-group in this order from an object-side. The first lens-group consists of a positive meniscus-lens with its convex surface facing the object-side and three negative meniscus-lenses with their convex surfaces facing the object-side in this order from the object-side. The second lens-group includes two cemented lenses, and a lens closest to an image-side in the second lens-group is one of the at least two cemented lenses. The third lens-group consists of a 3a-th lens-group, which consists of a positive meniscus-lens with its convex surface facing the object-side and a negative meniscus-lens with its convex surface facing the object-side, and a 3b-th lens-group, which includes at least two cemented lenses and has positive refractive power as a whole, in this order from the object-side.
Abstract translation: 反射型广角镜从物体侧依次由负的第一透镜组，正的第二透镜组和正的第三透镜组构成。 第一透镜组由其凸面朝向物体侧的正弯月透镜和从物体侧依次以面朝物体侧的三个负弯月透镜组成。 第二透镜组包括两个胶合透镜，并且最靠近第二透镜组中的图像侧的透镜是至少两个胶合透镜中的一个。 第三透镜组由第三十三透镜组组成，其由其凸面朝向物体侧的正弯月透镜和其凸面朝向物体侧的负弯月透镜组成，并且 第3b透镜组，其包括至少两个胶合透镜，并且从物体侧开始依次具有正的折射光焦度。
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公开(公告)号：US09235035B2
公开(公告)日：2016-01-12
申请号：US14336387
申请日：2014-07-21
Applicant: FUJIFILM Corporation
Inventor： Yasutaka Shimada
IPC: G02B15/17
CPC classification number: G02B15/17
Abstract: A zoom lens substantially consists of a positive first lens group, a negative second lens group which moves from the object side to the image side while changing magnification from the wide angle end to the telephoto end, a negative third lens group, and a positive fourth lens group having an aperture stop St, wherein the first lens group includes a negative meniscus lens on the most-object side; the second lens group is composed of a negative second-a lens group having at least one aspheric surface and a positive second-b lens group, and the distance therebetween changes while changing magnification; a third lens group moves such that the distance between the third lens group and a fourth lens group at the telephoto end becomes narrower than at the wide angle end; and conditional expression (1) below is satisfied: 1.89
Abstract translation: 变焦透镜基本上由正的第一透镜组，负的第二透镜组，从物体侧向像侧移动，同时从广角端到望远端的放大倍率变化，负的第三透镜组和正的第四透镜组 具有孔径光阑St的透镜组，其中第一透镜组在最物体侧包括负弯月形透镜; 第二透镜组由具有至少一个非球面和正二次透镜组的负二次透镜组构成，并且其间的距离在改变倍率时变化; 第三透镜组移动，使得在望远端的第三透镜组和第四透镜组之间的距离变得比广角端窄; 并满足以下条件式（1）：1.89
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公开(公告)号：US11378790B2
公开(公告)日：2022-07-05
申请号：US16826725
申请日：2020-03-23
Applicant: FUJIFILM Corporation
Inventor： Takuya Tanaka , Takuya Tanaka , Masanao Kawana , Yasutaka Shimada
Abstract: The zoom lens consists of, in order from an object side, a positive first lens group, a negative second lens group, a third lens group, a positive fourth lens group, and a positive fifth lens group. During zooming, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of, in order from an object side, a negative first a lens group, a positive first b lens group that moves during focusing, and a positive first c lens group. A most-image-side lens of the first b lens group is a negative meniscus lens having a convex surface facing an object side.
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公开(公告)号：US11294158B2
公开(公告)日：2022-04-05
申请号：US16828641
申请日：2020-03-24
Applicant: FUJIFILM Corporation
Inventor： Masanao Kawana , Yasutaka Shimada , Takuya Tanaka , Takuya Tanaka
Abstract: The 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 second lens group, the third lens group, and the fourth lens group move. The first lens group consists of, in order from an object side, a negative first a lens group, a positive first b lens group that moves during focusing, and a positive first c lens group. The second lens group includes one positive lens and one or more negative lenses successively in order from a most object side to an image side.
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公开(公告)号：US10698187B2
公开(公告)日：2020-06-30
申请号：US16120475
申请日：2018-09-04
Applicant: FUJIFILM Corporation
Inventor： Takuya Tanaka , Yasutaka Shimada
IPC: G02B15/02 , G02B15/10 , G02B13/18 , G02B15/167
Abstract: An extender lens is removably inserted into a master lens, performs an increase in a focal length without changing an imaging position due to insertion, and consists of a positive first lens group and a negative second lens group in order from the object side. The first lens group consists of one or more positive lenses in order from the object side, and a three-lens cemented lens having three lenses of a positive lens, a negative lens, and a positive lens having cemented together in order from the object side. The following Conditional Expression (1) relating to an Abbe number ν1n of the negative lens of the three-lens cemented lens is satisfied: 26
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