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公开(公告)号：US20230194840A1
公开(公告)日：2023-06-22
申请号：US18062454
申请日：2022-12-06
Applicant: FUJIFILM Corporation
Inventor： Masato KONDO , Tatsuyuki OGINO , Takuya TANAKA
IPC: G02B15/20 , G02B15/177
CPC classification number: G02B15/20 , G02B15/177
Abstract: The variable magnification optical system consists of a front group, a middle group, and a rear group, in order from an object side. The front group consists of two or fewer lens groups and has a negative refractive power. The middle group includes only one lens group that has a positive refractive power as a lens group. The rear group consists of three or less lens groups. An aperture stop is disposed between a lens surface closest to an image side in the front group and a lens surface closest to the object side in the rear group. The front group includes at least three negative lenses and at least one positive lens. A negative meniscus lens convex toward the object side is disposed closest to the object side in the front group. The variable magnification optical system satisfies predetermined conditional expressions.
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公开(公告)号：US20230075727A1
公开(公告)日：2023-03-09
申请号：US17819176
申请日：2022-08-11
Applicant: FUJIFILM Corporation
Inventor： Takuya TANAKA , Yasutaka SHIMADA
Abstract: An imaging lens consisting of, in order from an object side to an image side: a first lens group that has a positive refractive power; a second lens group that has a positive refractive power; and a third lens group, wherein: during focusing, the second lens group moves along an optical axis, and the first lens group and the third lens group remain stationary with respect to an image plane, the second lens group includes a stop, an Lp1 lens, which is a positive lens, is disposed closest to the object side in the second lens group, an Lp2 lens, which is a positive lens, is disposed closest to the image side in the second lens group.
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公开(公告)号：US20220390726A1
公开(公告)日：2022-12-08
申请号：US17748548
申请日：2022-05-19
Applicant: FUJIFILM Corporation
Inventor： Takuya TANAKA , Masanao KAWANA , Motoari OTA , Daiki KOMATSU
Abstract: A zoom lens consists of, in order from the object side, a first lens group that has a positive refractive power, a middle group that includes a plurality of lens groups in which the spacings between adjacent lens groups change during zooming, and the final lens group. The focusing group that moves during focusing is disposed in the middle group. The zoom lens satisfies predetermined conditional expressions.
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公开(公告)号：US20190064489A1
公开(公告)日：2019-02-28
申请号：US16108020
申请日：2018-08-21
Applicant: FUJIFILM Corporation
Inventor： Takuya TANAKA
CPC classification number: G02B13/02 , G02B9/60 , G02B13/06 , G02B15/155 , G02B15/17
Abstract: The zoom lens consists of, in order from an object side, a first lens group having a positive power, a second lens group having a positive power, a third lens group having a negative power, a fourth lens group having a negative power, and a fifth lens group having a positive power. During zooming, the first lens group and the fifth lens group remain stationary, and the other lens groups move. The following conditional expression relating to a focal length f1 of the first lens group and a focal length f3 of the third lens group is satisfied: −10
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公开(公告)号：US20190025556A1
公开(公告)日：2019-01-24
申请号：US16139114
申请日：2018-09-24
Applicant: FUJIFILM Corporation
Inventor： Takuya TANAKA , Motoari OTA
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 is fixed, and distances between the respective lens groups change in predetermined manners. The first lens group consists of, in order from the object side, a negative lens group fixed during focusing, a positive lens group movable during focusing, and a positive lens group fixed during focusing. The lens group has on the most image side four lenses of, in order from the object side, a positive lens, a cemented lens in which a negative meniscus lens having a convex surface facing the object side and a positive lens are cemented, and a positive meniscus lens having a convex surface facing the object side.
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Patent Agency Ranking
公开(公告)号：US20180373001A1
公开(公告)日：2018-12-27
申请号：US16120475
申请日：2018-09-04
Applicant: FUJIFILM Corporation
Inventor： Takuya TANAKA , Yasutaka SHIMADA
IPC: G02B15/10
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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公开(公告)号：US20180364461A1
公开(公告)日：2018-12-20
申请号：US16110155
申请日：2018-08-23
Applicant: FUJIFILM Corporation
Inventor： Yasutaka SHIMADA , Takuya TANAKA
IPC: G02B15/163 , G02B13/18 , G02B13/04
Abstract: The zoom lens consists of, in order from the object side, a positive first lens group G1, a negative second lens group G2, a negative third lens group G3, a stop, and a positive fourth lens group G4. During zooming, the first lens group G1 and the fourth lens group G4 remain stationary, and the second lens group G2 and the third lens group G3 move. The first lens group G1 consists of, in order from the object side, a negative first lens group front group G1A that remains stationary during focusing, a positive first lens group intermediate group G1B that moves during focusing, and a positive first lens group rear group G1C that remains stationary during focusing. The following conditional expression relating to an Abbe number νn1A2 of the second negative lens from the object side is satisfied: 65
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公开(公告)号：US20180217360A1
公开(公告)日：2018-08-02
申请号：US15879463
申请日：2018-01-25
Applicant: FUJIFILM Corporation
Inventor： Shinkichi IKEDA , Takuya TANAKA
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 first lens group consists of, in order from the object side, a first-a lens group that remains stationary during focusing and has a negative refractive power, a first-b lens group that is moved during focusing and has a positive refractive power, and a first-c lens group that remains stationary during focusing and has a positive refractive power. The first-a lens group consists of, in order from the object side, a first lens that has a negative refractive power, a second lens that is convex toward the object side and has a positive refractive power, and a third lens that has a negative refractive power. At least one of the first lens or the third lens satisfies a predetermined conditional expression, and the entire system satisfies the other predetermined conditional expressions.
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公开(公告)号：US20180188510A1
公开(公告)日：2018-07-05
申请号：US15843254
申请日：2017-12-15
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA , Takuya TANAKA
IPC: G02B15/167 , G02B15/20
CPC classification number: G02B15/167 , G02B15/177 , G02B15/20
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 and remains stationary during focusing, 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 that is concave toward the image side and a negative lens.
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公开(公告)号：US20150085381A1
公开(公告)日：2015-03-26
申请号：US14488314
申请日：2014-09-17
Applicant: FUJIFILM Corporation
Inventor： Motoari OTA , Takuya TANAKA , Sumihiro NISHIHATA , Michio CHO
CPC classification number: G02B13/0045 , G02B9/60
Abstract: An imaging lens substantially consists of five lenses consisting of, in order from the object side: a first lens having a positive refractive power and having a meniscus shape with the convex surface toward the object side; a second lens having a biconcave shape; a third lens having a negative refractive power and having a meniscus shape with the convex surface toward the image side; a fourth lens having a positive refractive power; and a fifth lens having a negative refractive power, wherein an image-side surface of the fifth lens includes a concave surface and at least one inflection point, wherein a predetermined conditional expression is satisfied.
Abstract translation: 成像透镜基本上由五个透镜组成，按照从物体侧开始的顺序：具有正折光力并且具有凸面朝向物体侧的弯月面形状的第一透镜; 具有双凹形状的第二透镜; 具有负屈光力并且具有朝向图像侧的凸面的弯月形状的第三透镜; 具有正屈光力的第四透镜; 和具有负屈光力的第五透镜，其中所述第五透镜的像侧表面包括凹面和至少一个拐点，其中满足预定条件表达式。
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