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公开(公告)号：US11480775B2
公开(公告)日：2022-10-25
申请号：US17139202
申请日：2020-12-31
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura
IPC: G02B15/14 , G02B15/163 , G02B15/177 , G02B13/00 , G02B9/62 , G02B27/00 , G02B9/60 , G02B13/18 , G02B9/34 , G02B5/00 , G02B15/20 , G02B13/04
Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73
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公开(公告)号：US11350019B2
公开(公告)日：2022-05-31
申请号：US16356706
申请日：2019-03-18
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura
Abstract: The lens device includes an imaging lens and a controller. The imaging lens includes a focusing lens group which moves during focusing and an aberration correction lens group having a refractive power lower than a refractive power of the focusing lens group having the lowest refractive power. The controller adjusts a position of the aberration correction lens group relative to the focusing lens group of which focus sensitivity is maximized according to a changed condition. A predetermined conditional expression related to the focus sensitivity of the focusing lens group is satisfied.
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公开(公告)号：US10416410B2
公开(公告)日：2019-09-17
申请号：US15612371
申请日：2017-06-02
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura
Abstract: The imaging lens consists of, in order from the object side, a first lens group having a positive power, a second lens group having a negative power, and a third lens group. The first lens group consists of, in order from the object side, a positive front group, a diaphragm, and a positive rear group. The front group has a negative lens and a positive lens, the rear group has a negative lens and a positive lens, the second lens group consists of one negative lens, and the third lens group has a negative lens and a positive lens. During focusing, only the second lens group moves. The following conditional expression relating to a focal length of the second lens group and a focal length of the third lens group is satisfied: 2.5
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公开(公告)号：US09454015B2
公开(公告)日：2016-09-27
申请号：US14813145
申请日：2015-07-30
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura
CPC classification number: G02B27/646 , G02B15/17 , G02B27/0025
Abstract: A zoom lens consists of, in order from the object side, a positive first lens group which is fixed relative to the image plane during magnification change, a negative second lens group which is moved during magnification change, a negative third lens group which is moved during magnification change, a positive fourth lens group which is moved during magnification change, and a positive fifth lens group which is fixed relative to the image plane during magnification change, wherein magnification change is effected by changing all distances between the adjacent lens groups, the fifth lens group consists of, in order from the object side, a positive front group, a negative middle group, and a positive rear group, image stabilization is effected by shifting only the middle group in directions perpendicular to the optical axis direction, and the condition expression (1) is satisfied: 0.20
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公开(公告)号：US09170405B2
公开(公告)日：2015-10-27
申请号：US14314614
申请日：2014-06-25
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura
CPC classification number: G02B13/006 , G02B13/0045 , G02B13/04
Abstract: An imaging-lens substantially consists of a first-lens-group, a stop and a second-lens-group in this order from object-side. The first-lens-group substantially consists of three or less lenses including a negative-lens having meniscus-shape with convex-surface facing object-side and a positive-lens cemented on the negative-lens in this order from object-side. The second-lens-group substantially consists of a 21st-lens-group substantially consisting of a 21-1st-lens and a 21-2nd-lens and a 22nd-lens-group substantially consisting of a positive-lens. The 21-1st-lens is a positive-lens, an image-side-lens-surface of which has convex-shape facing image-side, and the absolute-value of a curvature-radius of the image-side-lens-surface of which is less than the absolute-value of a curvature-radius of an object-side-lens-surface thereof. The 21-2nd-lens is a negative-lens, an object-side-lens-surface of which has concave-shape facing object-side, and the absolute-value of a curvature-radius of the object-side-lens-surface of which is less than the absolute-value of a curvature-radius of an image-side-lens-surface thereof. A conditional-formula about optical-total-length and maximum-image-height is satisfied.
Abstract translation: 成像透镜基本上由物体侧依次包括第一透镜组，光阑和第二透镜组。 第一透镜组基本上由三个或更少的透镜组成，包括具有面向物体侧的凸面的弯月面形状的负透镜和从物体侧按顺序胶合在负透镜上的正透镜。 第二透镜组基本上由基本上由正面透镜组成的21-1透镜和21-2透镜和第22透镜组构成的第21透镜组组成。 21-1透镜是正透镜，其图像侧透镜表面具有面向图像侧的凸面形状，并且图像侧透镜表面的曲率半径的绝对值 小于其物镜侧透镜表面的曲率半径的绝对值。 第21-2透镜是负透镜，物镜侧透镜表面具有面向物体侧的凹面形状，物体侧透镜表面的曲率半径的绝对值 其小于其图像侧透镜表面的曲率半径的绝对值。 满足关于光学全长和最大像高的条件式。
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Patent Agency Ranking
公开(公告)号：US12222479B2
公开(公告)日：2025-02-11
申请号：US18450713
申请日：2023-08-16
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura , Taiga Noda
Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.
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公开(公告)号：US11774733B2
公开(公告)日：2023-10-03
申请号：US17570528
申请日：2022-01-07
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura , Taiga Noda
CPC classification number: G02B15/145121 , G02B9/60 , H04N23/55
Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.
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公开(公告)号：US11327282B2
公开(公告)日：2022-05-10
申请号：US17490843
申请日：2021-09-30
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura
IPC: G02B15/14 , G02B15/163 , G02B15/177 , G02B13/00 , G02B9/62 , G02B27/00 , G02B9/60 , G02B13/18 , G02B9/34 , G02B5/00 , G02B15/20 , G02B13/04
Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73
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公开(公告)号：US09465195B2
公开(公告)日：2016-10-11
申请号：US14726871
申请日：2015-06-01
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura
CPC classification number: G02B13/0015 , G02B9/60 , G02B13/0045 , H04N5/225
Abstract: An imaging lens substantially consists of a first lens-group, a stop and a second lens-group in this order from an object-side. The first lens-group substantially consists of three or less lenses including at least one negative lens and a positive lens. The second lens-group substantially consists of a 21st lens-group and a 22nd lens-group in this order from the object-side. The 21st lens-group substantially consists of three or less lenses and has positive refractive-power. The 22nd lens-group substantially consists of two lenses of a negative lens and a positive lens in this order from the object-side. Predetermined conditional formulas about distance on an optical-axis from a most-object-side lens surface in an entire system to an image-plane, maximum image height, distance on the optical-axis from a most-object-side lens surface in the first lens-group to a most-image-side lens surface in the second lens-group, and focal-length of the entire system are satisfied.
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公开(公告)号：US09395523B2
公开(公告)日：2016-07-19
申请号：US14819812
申请日：2015-08-06
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura
IPC: G02B15/14
CPC classification number: G02B15/14 , G02B15/173 , G02B27/0062 , G02B27/646
Abstract: A zoom lens consists of, in order from the object side, a positive first group, a negative second group, one or two middle groups including a positive mp group, and a positive rearmost group disposed at the most image-side position of the entire system. Zooming is effected by changing all distances between the adjacent groups. An A cemented lens formed by a positive lens and a negative lens which are cemented together in this order from the object side is disposed at the most object-side position of the second group, a B cemented lens formed by one positive lens and one negative lens is disposed on the image side of the A cemented lens and on the object side of the mp group, and a C cemented lens formed by one positive lens and one negative lens is disposed in the mp group. The zoom lens satisfies given condition expressions.
Abstract translation: 变焦透镜从对象侧依次包括：正的第一组，负的第二组，包括正的mp组的一个或两个中间组，以及设置在整个图像侧最靠近位置的正后方组 系统。 通过改变相邻组之间的所有距离来实现缩放。 由正物镜和负透镜形成的胶合透镜从物体侧按顺序粘合在一起设置在第二组的最物体侧位置，由一个正透镜和一个负像形成的B胶合透镜 透镜设置在A胶合透镜的图像侧和mp组的物体侧，并且在mp组中设置由一个正透镜和一个负透镜形成的C胶合透镜。 变焦透镜满足给定条件表达式。
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