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公开(公告)号：US11860346B2
公开(公告)日：2024-01-02
申请号：US17355212
申请日：2021-06-23
Applicant: FUJIFILM Corporation
Inventor： Kenji Ito , Toshio Sasaki , Masayasu Konishi , Michio Cho
IPC: G02B15/167 , G02B3/02 , G02B13/18 , G02B15/15 , G02B27/00
CPC classification number: G02B15/167 , G02B3/02 , G02B13/18 , G02B15/15 , G02B27/0025
Abstract: A lens 1 has 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：US11841486B2
公开(公告)日：2023-12-12
申请号：US17155283
申请日：2021-01-22
Applicant: FUJIFILM Corporation
Inventor： Daiki Kawamura , Michio Cho
CPC classification number: G02B15/1421 , G02B15/20 , G02B27/0025
Abstract: An imaging lens includes a positive first lens group and a second lens group, which are continuous in order from the position closest to the object side, as lens groups. During focusing, the distance between the first lens group and the second lens group changes. A stop is disposed closer to the image side than a lens which is second from the object side. A combined refractive power of all lenses closer to the object side than the stop is positive. The imaging lens includes an LA positive lens and an LB positive lens that satisfy a predetermined conditional expression at a position closer to the object side than the stop. An Abbe number of the LB positive lens is the maximum among Abbe numbers of all positive lenses closer to the object side than the stop.
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公开(公告)号：US11828923B2
公开(公告)日：2023-11-28
申请号：US17166677
申请日：2021-02-03
Applicant: FUJIFILM Corporation
Inventor： Masato Kondo , Tetsuya Ori , Michio Cho
CPC classification number: G02B15/143 , G02B15/20 , G02B27/0025
Abstract: An imaging lens consists of, in order from the object side, a first lens group, a stop, a positive second lens group, and a third lens group. During focusing, at least the second lens group moves and the third lens group does not move. The second lens group includes at least two negative lenses. The third lens group consists of one negative lens and one positive lens.
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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：US10795162B2
公开(公告)日：2020-10-06
申请号：US16218498
申请日：2018-12-13
Applicant: FUJIFILM Corporation
Inventor： Michio Cho
IPC: G02B27/01 , G02F1/13 , G02B27/22 , G02B27/04 , A61B3/00 , G03H1/08 , G02B23/12 , G03H1/22 , G02B30/34 , G02C7/08
Abstract: The image displayable eyeglasses include: a first transmissive optical element 13 that transmits an image of a subject and is capable of changing a refractive power; and a second transmissive optical element 13 that displays or reflects an image using an image signal and transmits the image of the subject. The image displayable eyeglasses are capable of switching between an image display mode, in which the image is displayed or reflected by the second transmissive optical element 12 so as to be incident on eyes of a wearer of the eyeglass body, and an eyeglass mode, in which the image of the subject transmitted through the first transmissive optical element 12 and the second transmissive optical element 13 is incident on the eyes of the wearer. The first transmissive optical element 12 is disposed closer to the wearer than the second transmissive optical element 13.
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Patent Agency Ranking
公开(公告)号：US10209497B2
公开(公告)日：2019-02-19
申请号：US15422792
申请日：2017-02-02
Applicant: FUJIFILM Corporation
Inventor： Taiga Noda , Michio Cho
Abstract: The imaging lens consists of, in order from an object side: a first lens group G1; a diaphragm; and a second lens group G2 that has a positive refractive power. The first lens group G1 consists of, in order from the object side, a first A lens group G1A that consists of two negative meniscus lenses concave toward an image side, and a first B lens group G1B that consists of only one positive lens or a negative lens and a positive lens. The second lens group G2 consists of, in order from the object side, a biconvex lens, a biconcave lens, one or two biconvex lenses, and a negative meniscus lens that is concave toward the object side. With such a configuration, the imaging lens satisfies predetermined conditional expressions.
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公开(公告)号：US10197893B2
公开(公告)日：2019-02-05
申请号：US15428169
申请日：2017-02-09
Applicant: FUJIFILM Corporation
Inventor： Tetsuya Ori , Michio Cho
Abstract: Provided are a rear converter lens and an imaging apparatus capable of achieving favorable optical performance and an appropriate back focal length with high magnification. The rear converter lens RCL consists of, in order from the object side, four lens-groups of positive, negative, negative, and positive lens-groups. In order from the object side, a first lens-group RG1 consists of a negative lens RL11 and a positive lens RL12, a second lens-group RG2 consists of a negative lens RL21 and a positive lens RL22, a third lens-group RG3 consists of a negative lens RL31, a positive lens RL32, and a negative lens RL33, and a fourth lens-group RG4 consists of a biconvex lens RL41 and a negative lens RL42. Here, 0.22
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公开(公告)号：US10168511B2
公开(公告)日：2019-01-01
申请号：US15421533
申请日：2017-02-01
Applicant: FUJIFILM Corporation
Inventor： Taiga Noda , Michio Cho
Abstract: An imaging lens is constituted by, in order from the object side to the image side: a first lens group; a stop; and a second lens group having a positive refractive power. The first lens group is constituted by, in order from the object side to the image side: one or two negative meniscus lenses, a biconcave lens, and a biconvex lens. The second lens group is constituted by, in order from the object side to the image side: a 2A lens group having a positive refractive power as a whole, constituted by a positive lens, a negative lens, and a positive lens; and a 2B lens group having a positive refractive power as a whole, constituted by a positive lens, a negative lens, and a positive lens. A predetermined conditional formula is satisfied.
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公开(公告)号：US10156696B2
公开(公告)日：2018-12-18
申请号：US15696219
申请日：2017-09-06
Applicant: FUJIFILM Corporation
Inventor： Kazuyoshi Okada , Michio Cho
Abstract: The imaging lens consists of a first lens group G1, an aperture stop St, and a positive second lens group G2, in order from an object side. The first lens group G1 consists of a 1-1st negative meniscus lens L11 with its convex surface toward the object side, a 1-2nd negative lens L12 with its concave surface toward an image side, a 1-3rd positive lens L13 having a biconvex shape, a 1-4th negative meniscus lens L14 with its convex surface toward the object side, and a 1-5th positive lens L15 with its convex surface toward the object side, in order from the object side. Predetermined conditional expressions are satisfied which relate to a focal length of the whole system, a focal length of the first lens group G1, and a distance on an optical axis between the 1-4th negative meniscus lens L14 and the 1-5th positive lens L15.
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公开(公告)号：US10061102B2
公开(公告)日：2018-08-28
申请号：US15272592
申请日：2016-09-22
Applicant: FUJIFILM Corporation
Inventor： Yousuke Naruse , Michio Cho
CPC classification number: G02B9/64 , G02B13/04 , G02B13/22 , G02B27/0025
Abstract: An imaging lens consists of, in order from the object side, a first lens group fixed during focusing, and a positive second lens group moved toward the object side during focusing from a distant object to a close object. The second lens group consists of, in order from the object side, a first cemented lens consisting of a biconvex lens and a negative lens having a smaller absolute value of curvature radius of the object-side surface than that of the image-side surface, and a second cemented lens as a whole having a positive refractive power and consisting of a negative lens having a smaller absolute value of curvature radius of the image-side surface than that of the object-side surface and a positive lens having a smaller absolute value of curvature radius of the object-side surface than that of the image-side surface. The imaging lens satisfies specific condition expressions.
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