公开(公告)号：US09176305B2

公开(公告)日：2015-11-03

申请号：US13911496

申请日：2013-06-06

Applicant: FUJIFILM Corporation

Inventor： Taro Asami

IPC: G02B13/04 ,  B60R1/00 ,  B60R11/04 ,  G02B13/06 ,  G02B13/00

CPC classification number: G02B13/04 ,  B60R1/00 ,  B60R11/04 ,  G02B9/62 ,  G02B13/0045 ,  G02B13/06

Abstract: An imaging lens consists of negative first lens having a concave image-side surface, positive second lens, negative third lens, positive fourth lens, positive fifth lens having a convex image-side surface, and negative sixth lens, which are in this order from an object side. In the imaging lens, all of the lenses constituting the lens system are single lenses, which are not cemented lenses, and a stop is arranged closer to the object side than an image-side surface of the fourth lens is arranged. When a refractive index of a material of the third lens for d-line is Nd3, the following formula (1-1) is satisfied: Nd3

Abstract translation: 成像透镜由具有凹面像侧面，正第二透镜，负第三透镜，正第四透镜，具有凸像侧表面的正第五透镜和负第六透镜的负第一透镜组成， 物体侧。 在成像透镜中，构成透镜系统的所有透镜都是不是胶合透镜的单一透镜，并且设置比第四透镜的图像侧表面更靠近物体侧的止挡件。 当d线的第三透镜的材料的折射率为Nd3时，满足下式（1-1）：Nd3 <1.65（1-1）。

公开(公告)号：US08964310B2

公开(公告)日：2015-02-24

申请号：US14060064

申请日：2013-10-22

Applicant: FUJIFILM Corporation

Inventor： Taro Asami

IPC: G02B13/04 ,  G02B9/34 ,  G02B13/00 ,  G02B13/06

CPC classification number: G02B13/04 ,  G02B9/34 ,  G02B13/004 ,  G02B13/06

Abstract: An imaging lens includes a negative first lens, a negative second lens, a third lens of a plano-convex shape having a convex surface directed toward an object side or of a positive meniscus shape having a convex surface directed toward the object side, and a fourth lens of a plano-convex shape having a convex surface directed toward an image side or of a positive meniscus shape having a convex surface directed toward the image side, which are arranged in this order from the object side. Further, the following conditional formula (4) is satisfied: 1.0

Abstract translation: 成像透镜包括负第一透镜，负第二透镜，具有朝向物体侧的凸表面的平凸形状的第三透镜或具有朝向物体侧的凸表面的正弯月形状，以及 具有朝向图像侧的凸面的正平面凸状的第四透镜或具有朝向像侧的凸面的正弯月形，从物侧开始依次配置。 此外，满足以下条件式（4）：1.0

公开(公告)号：US08670192B2

公开(公告)日：2014-03-11

申请号：US13907003

申请日：2013-05-31

Applicant: Fujifilm Corporation

Inventor： Taro Asami

IPC: G02B9/60

CPC classification number: G02B13/22 ,  G02B9/60 ,  G02B13/0045 ,  G02B13/04

Abstract: An imaging lens consists of a negative first lens having a concave object-side surface, a positive second lens, a negative third lens, a positive fourth lens having a convex object-side surface, and a positive fifth lens, which are in this order from an object side. A stop is arranged between an image-side surface of the first lens and an object-side surface of the third lens. When the focal length of an entire system is f, and the focal length of the first lens is f1, and the focal length of the second lens is f2, the following formula is satisfied: −1.30 −0.65  (7).

Abstract translation: 成像透镜由具有凹面物侧表面的负第一透镜，正第二透镜，负第三透镜，具有凸面物体侧表面的正第四透镜和正第五透镜构成，其顺序为 从物体侧。 在第一透镜的图像侧表面和第三透镜的物体侧表面之间布置有止动件。 当整个系统的焦距为f，第一透镜的焦距为f1，第二透镜的焦距为f2时，满足以下公式：-1.30 -0.65（7 ）。

公开(公告)号：US11940607B2

公开(公告)日：2024-03-26

申请号：US18066967

申请日：2022-12-15

Applicant: FUJIFILM Corporation

Inventor： Taro Asami ,  Toshihiro Aoi

IPC: G02B15/14 ,  G02B13/14 ,  G02B15/16

CPC classification number: G02B15/144 ,  G02B13/14 ,  G02B15/143105 ,  G02B15/144105 ,  G02B15/144113 ,  G02B15/16

Abstract: A variable magnification optical system consists of, in order from an object side to an image side, a first lens group, a second lens group, and a subsequent lens group. The variable magnification optical system satisfies a predetermined conditional expression for a partial dispersion ratio related to F line, C line, and a wavelength of 1970.09 nm, a d-line back focus of the variable magnification optical system at a telephoto end, a back focus in any one wavelength from a wavelength of 1300 nm to a wavelength of 2325.42 nm at the telephoto end, and a d-line focal length of the variable magnification optical system at the telephoto end.

公开(公告)号：US11886040B2

公开(公告)日：2024-01-30

申请号：US17102504

申请日：2020-11-24

Applicant: FUJIFILM Corporation

Inventor： Taro Asami

IPC: G02B9/64 ,  G02B13/18

CPC classification number: G02B9/64 ,  G02B13/18

Abstract: The imaging lens includes only eight lenses consisting of, in order from an object side, a negative first lens, a negative second lens, a positive third lens convex toward an image side, a positive fourth lens convex toward an object side, a negative fifth lens, a positive sixth lens convex toward the image side, a positive seventh lens convex toward the object side, and a negative eighth lens, as lenses having refractive powers, in which predetermined conditional expressions are satisfied.

公开(公告)号：US11567307B2

公开(公告)日：2023-01-31

申请号：US17094288

申请日：2020-11-10

Applicant: FUJIFILM Corporation

Inventor： Taro Asami ,  Toshihiro Aoi

IPC: G02B15/14 ,  G02B15/16 ,  G02B13/14

Abstract: A variable magnification optical system consists of, in order from an object side to an image side, a first lens group, a second lens group, and a subsequent lens group. The variable magnification optical system satisfies a predetermined conditional expression for a partial dispersion ratio related to F line, C line, and a wavelength of 1970.09 nm, a d-line back focus of the variable magnification optical system at a telephoto end, a back focus in any one wavelength from a wavelength of 1300 nm to a wavelength of 2325.42 nm at the telephoto end, and a d-line focal length of the variable magnification optical system at the telephoto end.

公开(公告)号：US09851529B2

公开(公告)日：2017-12-26

申请号：US15270039

申请日：2016-09-20

Applicant: FUJIFILM Corporation

Inventor： Taro Asami

IPC: G02B9/08 ,  G02B15/16 ,  G02B9/06 ,  G02B5/00 ,  G02B27/00 ,  G02B9/64

CPC classification number: G02B9/08 ,  G02B5/005 ,  G02B9/06 ,  G02B9/64 ,  G02B15/161 ,  G02B27/0025

Abstract: Disclosed is an imaging lens substantially consisting of a first lens group having a positive refractive power and a second lens group having a positive refractive power, arranged in this order from the object side. Focusing is performed by moving the entire second lens group along the optical axis. The most-image-side lens of the first lens group, a lens which is second from a most-image side in the first lens group, and a lens which is third from the most-image side in the first lens group are all meniscus lenses with convex surfaces toward the image side. The imaging lens satisfies the formula: 1.0

公开(公告)号：US09664882B2

公开(公告)日：2017-05-30

申请号：US15190693

申请日：2016-06-23

Applicant: FUJIFILM Corporation

Inventor： Taro Asami

IPC: G02B13/18 ,  G02B9/62 ,  G02B13/00 ,  G02B27/00 ,  H04N5/225 ,  G02B5/00 ,  G02B13/04 ,  G02B15/177 ,  G02B3/04

CPC classification number: G02B13/0045 ,  G02B3/04 ,  G02B5/005 ,  G02B9/62 ,  G02B13/0015 ,  G02B13/002 ,  G02B13/04 ,  G02B13/18 ,  G02B15/177 ,  G02B27/0018 ,  G02B27/0025 ,  H04N5/2254

Abstract: An imaging lens substantially consists of six lenses, composed of a negative first lens, a positive second lens, a negative third lens, a positive fourth lens, a positive fifth lens, and a negative sixth lens, disposed in order from the object side, and satisfies, when the distance between the first lens and the second lens is taken as Db12, the center thickness of the second lens is taken as D3, the focal length of the second lens is taken as f2, the focal length of the entire system is taken as f, the paraxial radius of curvature of the object side surface of the first lens is taken as R1f, and the paraxial radius of curvature of the image side surface of the first lens is taken as R1r, conditional expressions given below: 1.0

公开(公告)号：US09453988B2

公开(公告)日：2016-09-27

申请号：US14579118

申请日：2014-12-22

Applicant: FUJIFILM Corporation

Inventor： Taro Asami

IPC: G02B9/60 ,  G02B13/18 ,  G02B13/00 ,  G02B9/62 ,  G02B15/177 ,  G02B13/04 ,  G02B3/04 ,  G02B5/00

CPC classification number: G02B13/0045 ,  G02B3/04 ,  G02B5/005 ,  G02B9/62 ,  G02B13/0015 ,  G02B13/002 ,  G02B13/04 ,  G02B13/18 ,  G02B15/177

Abstract: An imaging lens composed of six lenses of a negative first lens, a positive second lens, a negative third lens, a positive fourth lens, a positive fifth lens, and a negative sixth lens, disposed in order from the object side, and when refractive indices of the third lens to the sixth lens are taken as Nd3 to Nd6 respectively, the imaging lens satisfies conditional expressions (1): Nd3

Abstract translation: 由物体侧依次配置的由负的第一透镜，正的第二透镜，负的第三透镜，正的第四透镜，正的第五透镜和负的第六透镜的六个透镜构成的成像透镜， Nd3 <1.7，（2）：Nd4 <1.6，（3）：Nd5 <1.6，（4）为Nd3〜Nd6，成像透镜满足条件式（1） ：Nd6 <1.89。

公开(公告)号：US09176304B2

公开(公告)日：2015-11-03

申请号：US14675952

申请日：2015-04-01

Applicant: FUJIFILM Corporation

Inventor： Taro Asami ,  Toshiaki Katsuma ,  Toru Ito ,  Masato Kondo ,  Ryoko Otomo

IPC: G02B13/04 ,  G02B3/02 ,  G02B13/00 ,  G02B9/62 ,  G02B13/06 ,  G02B13/18

CPC classification number: G02B13/0045 ,  G02B9/62 ,  G02B13/04 ,  G02B13/06 ,  G02B13/18

Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. When a curvature radius of an object-side surface of the fourth lens is R8, and a curvature radius of an image-side surface of the fourth lens is R9, and an Abbe number of the material of the third lens for d-line is νd3, and an Abbe number of the material of the fifth lens for d-line is νd5, the following conditional formulas (1) and (6) are satisfied: −0.61

Abstract translation: 成像透镜基本上由物体侧依次由负的第一透镜，负的第二透镜，正的第三透镜，正的第四透镜，负的第五透镜和正的第六透镜的六个透镜组成。 当第四透镜的物体侧表面的曲率半径为R8时，第四透镜的像侧表面的曲率半径为R9，并且用于d线的第三透镜的材料的阿贝数为 ＆ngr; d3，并且d线的第五透镜的材料的阿贝数为n5;满足以下条件式（1）和（6）：-0.61 <（R8 + R9）/（R8- R9）<0.44（1）; 和38.1 <＆ngr; d3 +＆ngr; d5 <45.1（6）。