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公开(公告)号：US11353682B2
公开(公告)日：2022-06-07
申请号：US16774839
申请日：2020-01-28
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura , Michio Cho
Abstract: The imaging lens comprises, successively in order from the object side, a positive first lens group that does not move during focusing, a second lens group that moves during focusing, a stop, and a positive third lens group that consists of all lenses moving integrally with the second lens group during focusing. The composite focal length of the second lens group and the third lens group is positive. The first lens group includes four or more positive lenses and three or more negative lenses. The imaging lens satisfies predetermined conditional expressions.
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公开(公告)号：US11290634B2
公开(公告)日：2022-03-29
申请号：US17026336
申请日：2020-09-21
Applicant: FUJIFILM Corporation
Inventor： Tetsu Wada , Michio Cho , Kensuke Masui
Abstract: Provided are an imaging apparatus, an imaging method, and a program that can directly determine a sensor position at which an image with good image quality is obtained from obtained image information. The imaging apparatus moves an image sensor to a plurality of sensor positions in the optical axis direction of an imaging lens, and focuses a subject at each of the plurality of sensor positions. Image data of the subject focused at each of the plurality of sensor positions is acquired, and the image data is analyzed to calculate an image evaluation value at each of the plurality of sensor positions.
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公开(公告)号：US11221470B2
公开(公告)日：2022-01-11
申请号：US16273970
申请日：2019-02-12
Applicant: FUJIFILM Corporation
Inventor： Michio Cho
Abstract: A variable magnification optical system consists of, in order from an object side, a first optical system remaining stationary during changing magnification and a second optical system including a plurality of lens groups moving during changing magnification. The first optical system includes a first mirror and a second mirror having reflective surfaces arranged to face each other. The first mirror is an optical element having a power at a position closest to the object side on an optical path and has a reflective surface concave toward the object side. The second mirror has a reflective surface convex toward the image side. An intermediate image is formed between the second mirror and the second optical system.
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公开(公告)号：US11079576B2
公开(公告)日：2021-08-03
申请号：US16547608
申请日：2019-08-22
Applicant: FUJIFILM Corporation
Inventor： Kenji Ito , Toshio Sasaki , Masayasu Konishi , Michio Cho
IPC: G02B15/167 , G02B3/02 , G02B13/18 , G02B15/15 , G02B27/00
Abstract: There are provided a lens, a zoom lens, and an imaging lens capable of eliminating blurriness of a ring zone without reducing resolution and increasing the number of steps of processing. A lens 1 has random unevenness within an optical effective diameter D of an optical surface 2, an arithmetic mean roughness Ra within the optical effective diameter D of the optical surface 2 is 20 nm or more and 50 nm or less, and an average value of widths W of protrusion portions 3 of the unevenness on an average line C2 of a roughness curve C1 of the optical surface 2 is 1/200 or more and 1/50 or less of the optical effective diameter D of the optical surface 2. The lens 1 is suitably used as a lens that composes a zoom lens or an imaging lens.
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公开(公告)号：US10437016B2
公开(公告)日：2019-10-08
申请号：US15412077
申请日：2017-01-23
Applicant: FUJIFILM Corporation
Inventor： Takashi Kunugise , Kazuyoshi Okada , Michio Cho
Abstract: The imaging lens includes, in order from the object side, a first lens group that remains stationary during focusing; a diaphragm; and a positive second lens group that moves to the object side during focusing from a long range to a close range. The first lens group includes, in order from the object side: a negative meniscus lens that has an absolute value of a radius of curvature of an image side surface smaller than that of an object side surface, a negative lens, a positive lens, and a negative lens. The second lens group includes five or less lenses, and includes: a positive Z lens that is formed continuously in order from a most image side; a negative Y lens that has an absolute value of a radius of curvature of an object side surface smaller than that of an image side surface; and a positive X lens.
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Patent Agency Ranking
公开(公告)号：US10401593B2
公开(公告)日：2019-09-03
申请号：US15412766
申请日：2017-01-23
Applicant: FUJIFILM Corporation
Inventor： Toshihiro Aoi , Takashi Kunugise , Kazuyoshi Okada , Michio Cho
Abstract: The imaging lens includes, in order from the object side, a first lens group that remains stationary during focusing; a diaphragm; and a positive second lens group that moves to the object side during focusing from a long range to a close range. The second lens group includes a positive Z lens that is formed continuously in order from a most image side, a negative Y lens that has an absolute value of a radius of curvature of an object side surface smaller than an absolute value of a radius of curvature of an image side surface, a positive X lens, and a negative W lens that has an absolute value of a radius of curvature of an image side surface smaller than that of an object side surface. The imaging lens satisfies a conditional expression about of the radii of curvature of the X lens and the W lens.
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公开(公告)号：US09778445B2
公开(公告)日：2017-10-03
申请号：US15215786
申请日：2016-07-21
Applicant: FUJIFILM Corporation
Inventor： Ukyo Tomioka , Michio Cho
IPC: G02B15/14 , G02B15/173 , G02B15/20 , G02B13/00 , G02B27/00
CPC classification number: G02B15/14 , G02B13/009 , G02B15/173 , G02B15/20 , G02B27/0025
Abstract: A variable magnification optical system includes, in order from the object side: a positive first lens group; a negative second lens group; a positive third lens group; a negative fourth lens group; and a positive fifth lens group. When changing magnification from the wide angle end to the telephoto end, the first and third lens groups are fixed with respect to an image formation plane, the second lens group moves toward the image side, the fourth lens group moves, and the distance between the fourth and fifth lens groups changes. A rearward lens group constituted by the third, fourth, and fifth lens groups has a positive refractive power throughout the variable magnification range. The transverse magnification ratio of the fourth lens group when focused on an object at infinity is negative throughout the variable magnification range.
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公开(公告)号：US09709796B2
公开(公告)日：2017-07-18
申请号：US15099672
申请日：2016-04-15
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada , Michio Cho
CPC classification number: G02B23/243 , G02B13/06
Abstract: An objective lens for endoscopes includes, in order from the object side: a front group; an aperture stop; and a positive rear group. The front group includes, in order from the object side, a negative first lens, in which the absolute value of the radius of curvature of the surface toward the image side is less than that of the surface toward the object side, and at least one plane parallel plate. The rear group includes, in order from the object side, a positive second lens, and a cemented lens formed by a positive third lens and a negative fourth lens. The coupling surface of the cemented lens is convex toward the image side. Conditional Formulae (1) through (3) concerning the plane parallel plates within the front group, the focal length of the first lens, the radius of curvature of the coupling surface of the cemented lens, etc., are satisfied.
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公开(公告)号：US09612424B2
公开(公告)日：2017-04-04
申请号：US14586179
申请日：2014-12-30
Applicant: FUJIFILM Corporation
Inventor： Hiroshi Yamada , Michio Cho
Abstract: An imaging lens consists of a first lens group, a second lens group, an aperture stop and a third lens group that has positive refractive power in this order from an object side. The first lens group consists of an L11 lens having positive refractive power, an L12 lens having negative refractive power, an L13 meniscus lens having negative refractive power with its concave surface facing an image side, an L14 lens having negative refractive power with its concave surface facing the object side and two or three lenses, each having positive refractive power, in this order from the object side. The second lens group consists of an L2p lens having positive refractive power and an L2n lens having negative refractive power.
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公开(公告)号：US09575295B2
公开(公告)日：2017-02-21
申请号：US14721020
申请日：2015-05-26
Applicant: FUJIFILM Corporation
Inventor： Taiga Noda , Michio Cho
IPC: G02B15/14 , G02B13/00 , G02B15/16 , G02B9/00 , G02B15/173
CPC classification number: G02B13/009 , G02B9/00 , G02B15/14 , G02B15/16 , G02B15/173
Abstract: A zoom lens includes, in order from the object side, a positive first group, a negative second group, a stop, a positive third group, a negative fourth group, and a positive fifth group. During magnification change from the wide-angle end to the telephoto end, the first to fourth groups are moved to always increase the distance between the first and second groups, always decrease the distance between the second and third groups, and change the distance between the third and fourth groups and the distance between the fourth and fifth groups. The third group includes, in order from the object side, at least a positive lens, a positive lens, a negative lens, and a positive lens, and satisfies condition expression (1) below: 25
Abstract translation: 变焦透镜从物体侧依次包括正的第一组，负的第二组，停止，正的第三组，负的第四组和正的第五组。 在从广角端到远摄端的放大倍数变化期间，第一至第四组移动以总是增加第一组和第二组之间的距离，总是减小第二组和第三组之间的距离，并且改变第 第三组和第四组以及第四组和第五组之间的距离。 第三组从物体侧依次包括至少正透镜，正透镜，负透镜和正透镜，并且满足以下条件表达式（1）：25
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