公开(公告)号：US20210325646A1

公开(公告)日：2021-10-21

申请号：US17355212

申请日：2021-06-23

申请人： FUJIFILM Corporation

发明人： Kenji ITO ,  Toshio SASAKI ,  Masayasu KONISHI ,  Michio CHO

IPC分类号： G02B15/167 ,  G02B3/02 ,  G02B13/18 ,  G02B15/15

摘要： 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.

公开(公告)号：US20190265446A1

公开(公告)日：2019-08-29

申请号：US16273970

申请日：2019-02-12

申请人： FUJIFILM Corporation

发明人： Michio CHO

IPC分类号： G02B15/16 ,  G02B17/08

摘要： 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.

公开(公告)号：US20190094505A1

公开(公告)日：2019-03-28

申请号：US16133511

申请日：2018-09-17

申请人： FUJIFILM Corporation

发明人： Yasutaka SHIMADA ,  Michio CHO

IPC分类号： G02B15/16 ,  G02B27/00

摘要： 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.

公开(公告)号：US20180088302A1

公开(公告)日：2018-03-29

申请号：US15696219

申请日：2017-09-06

申请人： FUJIFILM Corporation

发明人： Kazuyoshi OKADA ,  Michio CHO

IPC分类号： G02B9/64 ,  G02B13/00 ,  G02B7/04

CPC分类号： G02B9/64 ,  G02B7/04 ,  G02B13/0045 ,  H04N5/23212

摘要： 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.

公开(公告)号：US20180088301A1

公开(公告)日：2018-03-29

申请号：US15712235

申请日：2017-09-22

申请人： FUJIFILM Corporation

发明人： Ryoko OTOMO ,  Michio CHO

IPC分类号： G02B9/62 ,  G02B13/00

CPC分类号： G02B9/62 ,  G02B13/0045 ,  G02B13/04 ,  G02B13/18

摘要： Provided are an imaging lens, which has a small F number and in which various aberrations are satisfactorily corrected, and an imaging apparatus including the imaging lens.The imaging lens includes, in order from an object side: a first lens that has a biconcave shape; a second lens that is convex toward an image side and has a positive refractive power; a third lens that has a biconvex shape; a fourth lens that has a negative refractive power; a fifth lens that has a positive refractive power; and a sixth lens that has a negative refractive power. Assuming that L1f and L1r are paraxial radii of curvature of an object side surface and an image side surface of the first lens, Conditional Expression (1) is satisfied. 0.1

公开(公告)号：US20160306161A1

公开(公告)日：2016-10-20

申请号：US15099672

申请日：2016-04-15

申请人： FUJIFILM Corporation

发明人： Keisuke HARADA ,  Michio CHO

IPC分类号： G02B23/24 ,  G02B13/00 ,  G02B13/04 ,  G02B9/12

CPC分类号： G02B23/243 ,  G02B13/06

摘要： 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.

摘要翻译： 用于内窥镜的物镜包括从物体侧开始的顺序：前组; 孔径光阑; 和积极的后组。 所述前组按照从物体侧起依次包括负第一透镜，其中朝向像侧的表面的曲率半径的绝对值小于朝向物体侧的表面的曲率半径的绝对值，以及至少一个 平面平行板。 后组按照物体侧依次包括正的第二透镜和由正的第三透镜和负的第四透镜形成的胶合透镜。 胶合透镜的耦合表面朝向像侧凸出。 关于前组中的平面平行板，第一透镜的焦距，胶合透镜的耦合表面的曲率半径等的条件公式（1）至（3）。

公开(公告)号：US20160154222A1

公开(公告)日：2016-06-02

申请号：US14953098

申请日：2015-11-27

申请人： FUJIFILM Corporation

发明人： Taiga NODA ,  Ryoko TOMIOKA ,  Michio CHO

IPC分类号： G02B15/163 ,  G02B27/00 ,  G02B15/20

CPC分类号： G02B15/173 ,  G02B15/14 ,  G02B15/163 ,  G02B15/20 ,  G02B27/646

摘要： A zoom lens is constituted by, 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. The distance between the first and second lens groups constantly increases, the distance between the second and third lens groups constantly decreases, the distance between the third and fourth lens groups constantly changes, and the distance between the fourth and fifth lens groups constantly increases when changing magnification from the wide angle end to the telephoto end. The first lens group is constituted by three lenses, which are negative, positive, and positive in order from the object side. The second lens group is constituted by five lenses, which are negative, negative, positive, positive, and negative in order from the object side. The fifth lens group is constituted by a single lens component.

摘要翻译： 变焦透镜从物体侧依次构成：正的第一透镜组; 负第二透镜组; 正第三透镜组; 负第四透镜组; 和正五眼镜组。 第一和第二透镜组之间的距离不断增加，第二透镜组和第三透镜组之间的距离恒定地减小，第三和第四透镜组之间的距离不断变化，并且第四和第五透镜组之间的距离在改变时持续增加 从广角端到远摄端的放大倍率。 第一透镜组由三个透镜构成，从物体侧起依次为负，正和正。 第二透镜组由从物体侧起依次为负，负，正，正和负的五个透镜构成。 第五透镜组由单个透镜组件构成。

公开(公告)号：US20160085048A1

公开(公告)日：2016-03-24

申请号：US14854316

申请日：2015-09-15

申请人： FUJIFILM Corporation

发明人： Ukyo TOMIOKA ,  Michio CHO

IPC分类号： G02B9/64 ,  G02B27/00

CPC分类号： G02B9/64 ,  G02B15/161 ,  G02B27/0025

摘要： An imaging lens consists of, disposed in order from the object side, a front group, a stop, and a rear group, wherein the front group includes, in order from the most-object side, a positive first lens, a negative second lens, and a negative third lens which are adjacently disposed, the rear group consists of two sets of cemented lenses having positive refractive powers and a positive single lens, the object-side cemented lens is formed by cementing, in order form the object side, a positive lens with a convex surface toward the image side and a negative meniscus lens together, the image-side cemented lens is formed by cementing, in order from the object side, a negative meniscus lens with a concave surface toward the image side and a positive lens together, and the image-side cemented lens is disposed at the most-image side of the rear group.

摘要翻译： 成像透镜由物体侧依次设置，前组，止挡和后组，其中前组从最物体侧依次包括正第一透镜，负第二透镜 和相邻设置的负第三透镜，后组由两组具有正屈光力的胶合透镜和正单透镜组成，物体侧胶合透镜通过胶合形成，以形成物体侧，形成物体侧 正面透镜的凸面朝向像侧，负弯月形透镜在一起，图像侧胶合透镜通过从物体侧依次固定具有凹面朝向像侧的负凹凸透镜而形成， 镜片在一起，并且图像侧胶合透镜设置在后组的最图像侧。

公开(公告)号：US20150212298A1

公开(公告)日：2015-07-30

申请号：US14604010

申请日：2015-01-23

申请人： FUJIFILM Corporation

发明人： Yoshikazu SHINOHARA ,  Michio CHO

IPC分类号： G02B13/00 ,  G03B13/32 ,  G02B9/64

CPC分类号： G02B13/0045 ,  G02B9/64

摘要： An imaging lens is essentially constituted by seven lenses, including: a positive first lens having a convex surface toward the object side; a second lens, of which at least one surface is of an aspherical shape; a third lens, of which at least one surface is of an aspherical shape; a fourth lens, of which at least one surface is of an aspherical shape; a positive fifth lens of a meniscus shape with a convex surface toward the image side; a sixth lens, of which at least one surface is of an aspherical shape; and a negative seventh lens having a concave surface toward the image side, provided in this order from the object side. The imaging lens satisfies a predetermined conditional formula.

摘要翻译： 成像透镜基本上由七个透镜构成，包括：具有朝向物体侧的凸面的正的第一透镜; 第二透镜，其至少一个表面是非球面形状; 第三透镜，其至少一个表面是非球面形状; 第四透镜，其至少一个表面是非球面形状; 具有朝向图像侧的凸面的弯液面形状的正的第五透镜; 第六透镜，其至少一个表面是非球面形状; 以及从物体侧依次设置具有朝向像侧的凹面的负第七透镜。 成像透镜满足预定的条件公式。

公开(公告)号：US20150116848A1

公开(公告)日：2015-04-30

申请号：US14586179

申请日：2014-12-30

申请人： FUJIFILM Corporation

发明人： Hiroshi YAMADA ,  Michio CHO

IPC分类号： G02B13/04 ,  G02B9/64

CPC分类号： G02B13/04 ,  G02B9/64 ,  G02B15/14

摘要： 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.

摘要翻译： 成像透镜由物体侧依次具有正折射力的第一透镜组，第二透镜组，孔径光阑和第三透镜组构成。 第一透镜组由具有正折光力的L11透镜，具有负折光力的L12透镜，具有负折射力的L13弯月透镜，其凹面朝向像侧，具有负折射光焦度的L14透镜及其凹面 面对物体侧，两个或三个透镜，每个具有正折射光焦度，从物体侧开始。 第二透镜组由具有正折光力的L2p透镜和具有负屈光力的L2n透镜组成。