公开(公告)号：US10095009B2

公开(公告)日：2018-10-09

申请号：US14857844

申请日：2015-09-18

Applicant: FUJIFILM Corporation

Inventor： Tetsuya Ori ,  Michio Cho

IPC: G02B15/163 ,  G02B27/64 ,  G02B15/20 ,  G02B15/173

Abstract: A zoom lens is constituted essentially by six lens groups, in order from the object side to the image side: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a negative refractive power; and a sixth lens group having a positive refractive power. The distances between all pairs of adjacent lens groups change when changing magnification from the wide angle end to the telephoto end, and Conditional Formula (1) below is satisfied: −5

公开(公告)号：US09891416B2

公开(公告)日：2018-02-13

申请号：US15215883

申请日：2016-07-21

Applicant: FUJIFILM Corporation

Inventor： Ukyo Tomioka ,  Michio Cho

IPC: G02B15/16 ,  G02B15/20 ,  G02B15/28 ,  G02B15/173 ,  G02B15/24 ,  G02B13/00

CPC classification number: G02B15/20 ,  G02B13/009 ,  G02B15/16 ,  G02B15/173 ,  G02B15/24 ,  G02B15/28

Abstract: A variable magnification optical system includes, in order from the object side: a positive first lens group, which is fixed when changing magnification; a negative second lens group that moves from the object side to the image side when changing magnification from the wide angle end to the telephoto end; and a rearward lens group having a positive refractive power throughout the entire variable magnification range that includes at least one lens group that moves when changing magnification. The first lens group includes, in order from the object side, a positive first lens group front group, a positive first lens group middle group, and a first lens group rear group constituted by a negative lens. The first lens group front group and first lens group middle group include cemented lenses formed by cementing a negative lens and a positive lens, provided in this order from the object side, together.

公开(公告)号：US09759899B2

公开(公告)日：2017-09-12

申请号：US15254000

申请日：2016-09-01

Applicant: FUJIFILM Corporation

Inventor： Hajime Inukai ,  Michio Cho

IPC: G02B15/14 ,  G02B9/60 ,  G02B15/17 ,  G02B27/00 ,  G02B15/15 ,  G02B15/22 ,  G02B15/20 ,  G02B9/34 ,  G02B9/00 ,  G02B5/00 ,  G02B15/16 ,  G02B13/18 ,  G02B3/04 ,  G02B13/00

CPC classification number: G02B15/17 ,  G02B3/04 ,  G02B5/005 ,  G02B9/00 ,  G02B9/34 ,  G02B9/60 ,  G02B13/0045 ,  G02B13/006 ,  G02B13/009 ,  G02B13/18 ,  G02B15/14 ,  G02B15/15 ,  G02B15/16 ,  G02B15/20 ,  G02B15/22 ,  G02B27/0025

Abstract: A zoom lens is constituted by, in order from the object side to the image side: a positive first group which is fixed when changing magnification, a negative second lens group which moves when changing magnification, a negative third lens group which moves when changing magnification, and a positive fourth lens group which is fixed when changing magnification. The first lens group is constituted by a 1a lens of a negative meniscus shape, a positive 1b lens, and a positive 1c lens. The second lens group is constituted by a negative 2a lens, a biconcave 2b lens, a positive 2c lens, and a negative 2d lens. The third lens group is constituted by a negative 3a lens and a positive 3b lens. The fourth lens group includes a 4a lens, an aperture stop, and a positive 4b lens, which are consecutively provided from the most object side thereof.

公开(公告)号：US09720216B2

公开(公告)日：2017-08-01

申请号：US14940303

申请日：2015-11-13

Applicant: FUJIFILM Corporation

Inventor： Taiga Noda ,  Michio Cho

IPC: G02B15/14 ,  G02B15/20 ,  G02B15/163 ,  G02B27/00

CPC classification number: G02B15/20 ,  G02B15/163 ,  G02B27/0025

Abstract: A zoom lens includes, 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 to the telephoto end. The first lens group includes, in order from the object side, a negative lens, a positive lens, and a positive lens. The fourth lens group includes, in order from the object side, a negative lens, a negative lens, and a positive lens, and moves toward the image side when focusing from a far distance to a close distance.

公开(公告)号：US09720209B2

公开(公告)日：2017-08-01

申请号：US14856087

申请日：2015-09-16

Applicant: FUJIFILM Corporation

Inventor： Takashi Kunugise ,  Michio Cho

IPC: G02B13/24 ,  G02B9/64 ,  G02B15/177

CPC classification number: G02B9/64 ,  G02B15/177

Abstract: An imaging lens is constituted essentially by, in order from the object side to the image side, a negative first lens group, a positive second lens group, a stop, and a positive third lens group. The first lens group is constituted essentially by four or fewer lenses, has a positive lens and a negative meniscus lens provided adjacent to each other in this order from the most object side, and further has a negative lens at the most image side. The second lens group is constituted essentially by one single lens. The third lens group is constituted essentially by five or fewer lenses, and has four lenses having refractive powers of different signs adjacent to each other provided in order as lenses most toward the image side. Predetermined conditional formulae are satisfied.

公开(公告)号：US09709775B2

公开(公告)日：2017-07-18

申请号：US14863459

申请日：2015-09-24

Applicant: FUJIFILM Corporation

Inventor： Yoshikazu Shinohara ,  Kazuya Yoneyama ,  Michio Cho ,  Yoshiaki Ishii

IPC: G02B13/18 ,  G02B3/02 ,  G02B9/62 ,  G02B13/00 ,  G02B5/00 ,  G02B27/00 ,  G02B3/04

CPC classification number: G02B13/0045 ,  G02B3/04 ,  G02B5/005 ,  G02B9/62 ,  G02B13/002 ,  G02B13/18 ,  G02B27/0025

Abstract: An imaging lens is constituted by six lenses, including, in order from the object side to the image side: a positive first lens having a convex surface toward the object side; a negative second lens; a positive third lens, which is a meniscus lens having a convex surface toward the object side; a positive fourth lens; a negative fifth lens having a concave surface toward the object side; and a negative sixth lens, of which the image toward the image side is of an aspherical shape which is concave in the vicinity of the optical axis and convex at the peripheral portion thereof. Conditional formulae related to the focal length f of the entire lens system, the focal length f1 of the first lens, and the focal length f4 of the fourth lens is satisfied.

公开(公告)号：US09671590B2

公开(公告)日：2017-06-06

申请号：US14746842

申请日：2015-06-23

Applicant: FUJIFILM Corporation

Inventor： Masato Kondo ,  Michio Cho

IPC: G02B3/02 ,  G02B13/18 ,  G02B13/00 ,  G02B9/60

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

Abstract: An imaging lens consists of five lenses, including: a first lens having a positive refractive power and a meniscus shape with a convex surface toward the object side, a second lens having a biconcave shape with the surface having the radius of curvature with the smaller absolute value 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.

公开(公告)号：US09423594B2

公开(公告)日：2016-08-23

申请号：US14597774

申请日：2015-01-15

Applicant: FUJIFILM Corporation

Inventor： Takayuki Noda ,  Michio Cho

IPC: G02B13/18 ,  G02B3/02 ,  G02B9/62 ,  G02B13/00 ,  H04N5/225

CPC classification number: G02B13/0045 ,  G02B9/62 ,  G02B13/18 ,  H04N5/2254

Abstract: An imaging lens is formed from six lenses, including a negative first lens having a concave surface toward the object side, a positive second lens, a negative third lens, a negative fourth lens of a meniscus shape with a concave surface toward the object side, a fifth lens, and a sixth lens having a concave surface toward the image side. The surface toward the image side thereof has an aspherical shape having at least one inflection point thereon, provided in this order from the object side.

Abstract translation: 成像透镜由六个透镜形成，包括具有朝向物体侧的凹面的负的第一透镜，正的第二透镜，负的第三透镜，具有朝向物体侧的凹面的弯液面的负的第四透镜， 第五透镜和具有朝向图像侧的凹面的第六透镜。 朝向其像侧的表面具有从物体侧起依次设置的至少一个拐点的非球面形状。

公开(公告)号：US09405107B2

公开(公告)日：2016-08-02

申请号：US14627047

申请日：2015-02-20

Applicant: FUJIFILM Corporation

Inventor： Noboru Koizumi ,  Michio Cho

IPC: G02B9/34 ,  G02B15/17 ,  G02B13/18 ,  G02B13/00 ,  G02B15/20

CPC classification number: G02B15/17 ,  G02B13/009 ,  G02B13/18 ,  G02B15/20

Abstract: A zoom lens consists essentially of a positive first lens group, a negative second lens group, a negative third lens group, and a positive fourth lens group. During zooming from the wide angle end to the telephoto end, the first lens group and the fourth lens group are fixed, the third lens group is moved monotonously from the object side to the image side, and the second lens group is moved to correct an image plane variation associated with the zooming When the amounts of movements of the second lens group and the third lens group are taken as M2 and M3 respectively, the zoom lens satisfies a conditional expression (1): 0

Abstract translation: 变焦透镜基本上由正的第一透镜组，负的第二透镜组，负的第三透镜组和正的第四透镜组组成。 在从广角端到远摄端的变焦期间，第一透镜组和第四透镜组被固定，第三透镜​​组从物体侧单调地移动到像侧，并且移动第二透镜组以校正 与变焦相关联的图像平面变化当第二透镜组和第三透镜组的移动量分别取为M2和M3时，变焦透镜满足条件表达式（1）：0

公开(公告)号：US09335516B2

公开(公告)日：2016-05-10

申请号：US14492341

申请日：2014-09-22

Applicant: FUJIFILM Corporation

Inventor： Takuya Tanaka ,  Tatsuro Iwasaki ,  Michio Cho

IPC: G02B3/02 ,  G02B13/18 ,  G02B9/60 ,  G02B13/00 ,  G02B3/04 ,  G02B27/00 ,  G02B5/00

CPC classification number: G02B13/0045 ,  G02B3/04 ,  G02B5/005 ,  G02B9/60 ,  G02B13/0015 ,  G02B13/002 ,  G02B13/18 ,  G02B27/0025

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 positive refractive power and having a meniscus shape with the convex surface toward the image side; a fourth lens having a positive refractive power and having a convex surface toward the image side; and a fifth lens having a negative refractive power, 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; 第三透镜，具有正的折光力并且具有朝向图像侧的凸面的弯月形状; 具有正折光力并具有朝向像侧的凸面的第四透镜; 以及具有负屈光力的第五透镜，其中满足预定条件表达式。