公开(公告)号：US20240353652A1

公开(公告)日：2024-10-24

申请号：US18638523

申请日：2024-04-17

Applicant: FUJIFILM Corporation

Inventor： Yuya HIRAKAWA ,  Masato KONDO ,  Shunsuke MIYAGISHIMA ,  Yasutaka SHIMADA

IPC: G02B9/12

CPC classification number: G02B9/12

Abstract: An imaging lens consists of, in order from the object side to the image side, a first lens group, a stop, a second lens group, and a third lens group. At least a spacing between the second lens group and the third lens group changes during focusing. The number of lenses included in the imaging lens is equal to or greater than 7 and equal to or less than 10. The imaging lens satisfies predetermined conditional expressions.

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.

公开(公告)号：US20130279026A1

公开(公告)日：2013-10-24

申请号：US13887757

申请日：2013-05-06

Applicant: FUJIFILM Corporation

Inventor： Taro ASAMI ,  Masato KONDO

IPC: G02B13/00

CPC classification number: G02B13/0015 ,  G02B9/12 ,  G02B13/0035 ,  G02B13/04 ,  G02B13/06

Abstract: An imaging lens includes negative first lens having a concave image-side surface, positive second lens having a convex object-side surface in a paraxial region, an aperture stop, and positive third lens having a convex image-side surface in the paraxial region, which are arranged in this order from an object side. The Abbe numbers of materials constituting the first lens and the third lens for d-line are greater than or equal to 40. The Abbe number of a material constituting the second lens for d-line is less than or equal to 40. When the focal length of an entire system is f, and the center thickness of the second lens is D3, and the focal length of the first lens is f1, the following formulas (1′) and (2) are satisfied: 1.7

Abstract translation: 成像透镜包括具有凹形图像侧表面的负第一透镜，在近轴区域具有凸面物侧表面的正第二透镜，孔径光阑和在近轴区域具有凸像侧表面的正第三透镜， 它们从物体侧依次排列。 构成第一透镜的材料的阿贝数和d线的第三透镜的数量大于或等于40.构成第二透镜的材料的阿贝数小于或等于40.当焦点 整个系统的长度为f，第二透镜的中心厚度为D3，第一透镜的焦距为f1，满足下式（1'）和（2）：1.7

公开(公告)号：US20180100989A1

公开(公告)日：2018-04-12

申请号：US15718290

申请日：2017-09-28

Applicant: FUJIFILM Corporation

Inventor： Masato KONDO

IPC: G02B13/00 ,  G02B9/14 ,  G02B7/04

CPC classification number: G02B13/006 ,  G02B7/04 ,  G02B9/14 ,  G02B13/02 ,  G03B19/00

Abstract: The imaging lens includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power. During focusing, only the second lens group moves in the direction of the optical axis. A lens closest to the object side in the first lens group and a lens adjacent to the lens on the image side have positive refractive powers, and the second lens group includes two or three lenses. Further, predetermined Conditional Expressions (1), (2), (3a), and (3b) are satisfied.

公开(公告)号：US20170242219A1

公开(公告)日：2017-08-24

申请号：US15402283

申请日：2017-01-10

Applicant: FUJIFILM Corporation

Inventor： Masato KONDO

IPC: G02B13/00 ,  G02B9/12 ,  G02B7/10

CPC classification number: G02B13/001 ,  G02B7/10 ,  G02B9/12 ,  G02B9/64 ,  G02B13/16

Abstract: The imaging lens consists of, in order from the object side, a first lens group G1 having a positive power, a diaphragm, a second lens group G2 having a positive power, and a third lens group G3. Each of the lens groups includes three or more lenses. A positive lens is disposed on a most object side in the first lens group G1, and a meniscus lens, which is concave toward the object side, is disposed to be closest to the object side in the second lens group G2. During focusing from an infinite distance object to a close-range object, elements ranging from the first lens group G1 to the second lens group G2 integrally move toward the object side, and the third lens group G3 remains stationary. The imaging lens satisfies a conditional expression about a radius of curvature of an air lens of the first lens group G1.

公开(公告)号：US20150286036A1

公开(公告)日：2015-10-08

申请号：US14745474

申请日：2015-06-22

Applicant: FUJIFILM Corporation

Inventor： Masato KONDO ,  Takayuki NODA ,  Michio CHO

IPC: G02B13/00 ,  G02B9/60

CPC classification number: G02B13/0045 ,  G02B9/60 ,  G02B13/18

Abstract: An imaging lens consists of five lenses, including: a fist lens having a biconvex shape with the surface having the radius of curvature with the smaller absolute value toward the object side, a second lens having a negative refractive power and a concave surface toward the image side, a third lens having a meniscus shape with a convex surface toward the object side, a fourth lens having a negative refractive power and a meniscus shape with a convex surface toward the image side, and a fifth lens having a negative refractive power and a meniscus shape with a concave surface toward the image side, the image-side surface thereof having at least one inflection point, disposed in this order from the object side.

Abstract translation: 成像透镜由五个透镜组成，包括：具有双凸形状的第一透镜，具有朝向物体侧的具有较小绝对值的曲率半径的表面，具有负屈光力的第二透镜和朝向图像的凹面 具有朝向物体侧的凸面的弯月形状的第三透镜，具有负屈光力的第四透镜和朝向像侧的凸面的弯月形状，以及具有负屈光力的第五透镜和 弯液面形状具有朝向图像侧的凹面，其图像侧表面具有至少一个拐点，从物体侧依次设置。

公开(公告)号：US20200333569A1

公开(公告)日：2020-10-22

申请号：US16847170

申请日：2020-04-13

Applicant: FUJIFILM Corporation

Inventor： Masato KONDO

IPC: G02B15/177 ,  G02B15/20 ,  G02B9/12 ,  G02B27/00 ,  H04N5/225

Abstract: The imaging lens consists of, in order from the object side, a first positive lens group, a stop, a second positive lens group, and a third negative lens group. During focusing, the first lens group and the second lens group move integrally. The first lens group consists of three or less lenses. The first lens group includes a cemented lens in which a negative lens and a positive lens are cemented in order from the object side. The third lens group consists of, in order from the object side, a negative aspheric lens, a negative lens, and a positive lens. The lens closest to the image side in the second lens group is a biconvex lens, and the imaging lens satisfies a predetermined conditional expression regarding the radius of curvature of the surface of the biconvex lens.

公开(公告)号：US20190064487A1

公开(公告)日：2019-02-28

申请号：US16111611

申请日：2018-08-24

Applicant: FUJIFILM Corporation

Inventor： Masato KONDO

IPC: G02B13/00 ,  G02B13/18 ,  G02B27/00 ,  G02B9/64

CPC classification number: G02B13/0045 ,  G02B9/64 ,  G02B13/006 ,  G02B13/16 ,  G02B13/18 ,  G02B27/005

Abstract: The imaging lens consists of, in order from an object side: a first lens group that has a positive refractive power; a stop; a second lens group that has a refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. The first lens group has, successively in order from a position closest to the object side, a negative meniscus lens that is convex toward the object side, a lens that is convex toward the object side, and a lens that is concave toward the object side. The third lens group consists of a negative lens. During focusing from an object at infinity to an object at a shortest distance, only the third lens group moves to an image side along an optical axis. The imaging lens satisfies a predetermined conditional expression relating to a focal length of the first lens group and a radius of curvature of an image side surface of a lens closest to the image side in the first lens group.

公开(公告)号：US20160147044A1

公开(公告)日：2016-05-26

申请号：US14945446

申请日：2015-11-19

Applicant: FUJIFILM Corporation

Inventor： Masato KONDO

IPC: G02B13/00 ,  G02B9/62 ,  G02B27/00

CPC classification number: G02B13/0045

Abstract: An imaging lens consisting essentially of six lenses, composed of, in order from the object side, a first lens having a negative refractive power with a concave surface on the object side, a second lens having a positive refractive power, a third lens, a fourth lens having a meniscus shape with a concave surface on the object side, a fifth lens having a meniscus shape with a concave surface on the object side, and a sixth lens having a meniscus shape with a convex surface on the object side.

Abstract translation: 一种成像透镜，基本上由六个透镜组成，从物体侧开始依次包括具有负折射光焦度的物体侧的凹面的第一透镜，具有正屈光力的第二透镜，第三透镜​​， 具有在物体侧具有凹面的弯液面形状的第四透镜，具有在物体侧具有凹面的弯月面形状的第五透镜，以及具有在物体侧上具有凸面的弯月面形状的第六透镜。

公开(公告)号：US20160004045A1

公开(公告)日：2016-01-07

申请号：US14856585

申请日：2015-09-17

Applicant: FUJIFILM Corporation

Inventor： Masato KONDO ,  Takayuki NODA ,  Tatsuyuki OGINO ,  Michio CHO

IPC: G02B13/00 ,  G02B27/00 ,  G02B9/60 ,  G02B5/00

CPC classification number: G02B13/0045 ,  G02B5/005 ,  G02B9/60 ,  G02B13/002 ,  G02B13/18 ,  G02B27/0025

Abstract: An imaging lens is constituted of five lenses, including, in order from the object side to the image side: a first lens having a positive refractive power, which is of a meniscus shape having a convex surface toward the object side; a second lens having a negative refractive power and a concave surface toward the image side; a third lens having a positive refractive power, which is of a meniscus shape having a convex surface toward the object side; a fourth lens having a negative refractive power; and a fifth lens having a negative refractive power and at least one inflection point on the surface thereof toward the image side. Predetermined conditional formulae are satisfied.

Abstract translation: 成像透镜由五个透镜构成，包括从物体侧到像侧的顺序：具有正折射光焦度的第一透镜，其具有朝向物体侧的凸面的弯月形状; 具有负折射力的第二透镜和朝向图像侧的凹面; 具有正折射力的第三透镜，其具有朝向物体侧的凸表面的弯月形状; 具有负屈光力的第四透镜; 以及具有负屈光力的第五透镜和其表面上的至少一个拐点朝向像侧。 满足预定条件公式。