公开(公告)号：US09030753B2

公开(公告)日：2015-05-12

申请号：US14298224

申请日：2014-06-06

Applicant: FUJIFILM Corporation

Inventor： Taiga Noda ,  Michio Cho

IPC: G02B15/14 ,  G02B13/04 ,  G02B15/177

CPC classification number: G02B13/04 ,  G02B15/177

Abstract: A zoom lens includes, in order from the object side, a negative first lens group, a positive second lens group and a positive third lens group, wherein, during magnification change from the wide-angle end to the telephoto end, at least the first and second lens groups are moved such that the interval between the first and second lens groups decreases and the interval between the second and third lens groups increases. The first lens group includes a negative meniscus first-group first lens with a convex object-side surface, a negative meniscus first-group second lens with a convex object-side surface, and a positive first-group third lens with a convex object-side surface, and the second lens group includes a positive lens, a cemented lens formed by a positive lens and a negative lens, a positive lens and a negative lens, in order from the object side. The zoom lens satisfies given conditional expressions.

Abstract translation: 变焦透镜从物体侧依次包括负第一透镜组，正第二透镜组和正第三透镜组，其中，在从广角端到望远端的放大倍率期间，至少第一 并且第二透镜组被移动，使得第一和第二透镜组之间的间隔减小，并且第二和第三透镜组之间的间隔增加。 第一透镜组包括具有凸形物体侧表面的负弯液面第一组第一透镜和具有凸形物体侧表面的负弯月面第一组第二透镜和具有凸形物体侧表面的正的第一组第三透镜， 并且第二透镜组包括正透镜，由正透镜和负透镜形成的胶合透镜，正透镜和负透镜，从物体侧开始。 变焦镜头满足给定的条件表达式。

公开(公告)号：US09013805B2

公开(公告)日：2015-04-21

申请号：US14314050

申请日：2014-06-25

Applicant: FUJIFILM Corporation

Inventor： Takashi Tanaka ,  Michio Cho

IPC: G02B15/14 ,  G02B15/16 ,  G02B15/173 ,  G02B13/00 ,  G02B27/64

CPC classification number: G02B15/16 ,  G02B13/009 ,  G02B15/173 ,  G02B27/646

Abstract: A zoom lens substantially consists of a positive first lens group, a negative second lens group, a positive third lens group, and a positive fourth lens group in this order from the object side, wherein the distance between the first lens group and the second lens group increases and the distance between the second lens group and the third lens group decreases, and the distance between the third lens group and the fourth lens group decreases while changing magnification. The fourth lens group substantially consists of a positive fourth-a lens group composed of a biconvex-shape lens, a negative meniscus-shape lens, and a biconvex-shape lens and a negative fourth-b lens group composed of a positive meniscus-shape lens and a biconcave-shape lens in this order from the object side, and only the fourth-b lens group is moved toward the image side while focusing.

Abstract translation: 从物体侧开始，变焦透镜基本上由正的第一透镜组，负的第二透镜组，正的第三透镜组和正的第四透镜组构成，其中第一透镜组和第二透镜之间的距离 组增加，并且第二透镜组和第三透镜组之间的距离减小，并且第三透镜组和第四透镜组之间的距离随着变化的变化而减小。 第四透镜组基本上由由双凸形透镜，负弯月形透镜和双凸透镜构成的正四面透镜组和由正弯月面形状构成的负四棱镜组 透镜和双凹透镜，并且只有第四-B透镜组在聚焦的同时朝向像侧移动。

公开(公告)号：US09013800B2

公开(公告)日：2015-04-21

申请号：US14184727

申请日：2014-02-20

Applicant: FUJIFILM Corporation

Inventor： Hiroki Saito ,  Michio Cho ,  Toru Ito

IPC: G02B15/16 ,  G02B15/22 ,  G02B13/18 ,  G02B13/04

CPC classification number: G02B15/161 ,  G02B5/005 ,  G02B13/04 ,  G02B13/18 ,  G02B15/16 ,  G02B15/177 ,  G02B15/22 ,  G03B2205/0046

Abstract: A zoom lens includes: a first lens group having a negative refractive power; and a second lens group having a positive refractive power, provided in this order from an object side. Magnification is changed by moving the first lens group and the second lens group. The first lens group includes a first lens having a negative refractive power, a second lens, a third lens having a negative refractive power, and a fourth lens having a positive refractive power, provided in this order from the object side. The zoom lens satisfies predetermined conditional formulae.

公开(公告)号：US09007698B2

公开(公告)日：2015-04-14

申请号：US14109186

申请日：2013-12-17

Applicant: FUJIFILM Corporation

Inventor： Michio Cho

IPC: G02B15/14 ,  G02B15/173

CPC classification number: G02B15/14 ,  G02B15/173

Abstract: A zoom lens includes: 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; and a fourth lens group having a negative refractive power provided in this order from an object side. All of the lens groups move along an optical axis such that the distance between the first lens group and the second group gradually becomes greater, the distance between the second lens group and the third lens group gradually becomes smaller, and the distance between the third lens group and the fourth lens group gradually becomes greater when changing magnification from a wide angle end to a telephoto end. The fourth lens group practically includes a lens having a positive refractive power, a lens having a negative refractive power, and a lens having a positive refractive power.

Abstract translation: 变焦透镜包括：具有正屈光力的第一透镜组; 具有负屈光力的第二透镜组; 具有正屈光力的第三透镜组; 以及从物体侧依次设置具有负折光力的第四透镜组。 所有透镜组沿着光轴移动，使得第一透镜组和第二组之间的距离逐渐变大，第二透镜组和第三透镜组之间的距离逐渐变小，并且第三透镜 当从广角端到长焦端改变放大倍数时，第四透镜组逐渐变大。 第四透镜组实际上包括具有正折光力的透镜，具有负折光力的透镜和具有正折光力的透镜。

公开(公告)号：US09001431B2

公开(公告)日：2015-04-07

申请号：US14106879

申请日：2013-12-16

Applicant: Fujifilm Corporation

Inventor： Takashi Tanaka ,  Michio Cho

IPC: G02B15/14 ,  G02B13/00 ,  G02B13/18 ,  G02B15/173 ,  G02B15/20

CPC classification number: G02B13/009 ,  G02B13/18 ,  G02B15/14 ,  G02B15/173 ,  G02B15/20

Abstract: A zoom lens substantially consists of, in order from the object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a negative fifth lens group. When varying magnification, the distances between adjacent lens groups are changed, while all of the lens groups are moved with respect to an image formation position. If β5T represents the image formation magnification of the fifth lens group when focusing on infinity at the telephoto end, fw represents the focal length of the entire lens system at the wide angle end, and f3 represents the focal length of the third lens group, formula (Ca): −5.00≦1−(β5T)2≦−3.30 and formula (H): 0.10

Abstract translation: 变焦透镜基本上由物体侧依次包括正的第一透镜组，负的第二透镜组，正的第三透镜组，正的第四透镜组和负的第五透镜组。 当改变放大倍率时，相对于图像形成位置移动所有透镜组，相邻透镜组之间的距离改变。 如果＆bgr; 5T表示当在远摄端聚焦在无限远时第五透镜组的图像形成倍率，fw表示在广角端处整个透镜系统的焦距，f3表示第三透镜组的焦距 ，式（Ca）：-5.00＆nlE; 1 - （＆bgr; 5T）2＆nlE; -3.30和式（H）：0.10

公开(公告)号：US08988784B2

公开(公告)日：2015-03-24

申请号：US14094812

申请日：2013-12-03

Applicant: FUJIFILM Corporation

Inventor： Takashi Tanaka ,  Michio Cho

IPC: G02B15/14 ,  G02B15/173 ,  G02B27/64

CPC classification number: G02B15/14 ,  G02B15/173 ,  G02B27/646

Abstract: A zoom lens substantially consists of, in order from the object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a negative fifth lens group. When varying magnification, the distances between adjacent lens groups are changed, while all of the lens groups are moved with respect to an image formation position. When focusing, only the fifth lens group is shifted. The fifth lens group has at least one negative lens and at least one positive lens.

Abstract translation: 变焦透镜基本上由物体侧依次包括正的第一透镜组，负的第二透镜组，正的第三透镜组，正的第四透镜组和负的第五透镜组。 当改变放大倍率时，相对于图像形成位置移动所有透镜组，相邻透镜组之间的距离改变。 当聚焦时，仅第五透镜组移动。 第五透镜组具有至少一个负透镜和至少一个正透镜。

公开(公告)号：US08922906B2

公开(公告)日：2014-12-30

申请号：US14217847

申请日：2014-03-18

Applicant: FUJIFILM Corporation

Inventor： Daiki Komatsu ,  Michio Cho

IPC: G02B15/14

CPC classification number: G02B15/14 ,  G02B13/18 ,  G02B15/17

Abstract: A zoom lens includes a positive first lens group fixed during zooming, a negative second lens moved to the image side upon zooming from the wide angle end to the telephoto end, a negative third lens group for image plane correction during zooming, and a positive fourth lens group fixed during zooming. The first lens group is composed of a negative first lens group front group, a positive first lens group middle group, and a positive first lens group rear group, disposed in order from the object side. The first lens group front group is composed of two negative lenses and one positive lens, disposed in order from the object side. Focusing is performed by moving only the first lens group middle group in an optical axis direction. The zoom lens satisfies a predetermined conditional expression.

Abstract translation: 变焦透镜包括在变焦期间固定的正的第一透镜组，在从广角端到望远端变焦时移动到图像侧的负第二透镜，用于在变焦期间进行图像平面校正的负第三透镜组，以及正第四透镜组 镜头组在变焦期间固定。 第一透镜组由从物体侧依次布置的负第一透镜组前组，正第一透镜组中
间组和正第一透镜组后组组成。 第一透镜组前组由从物体侧依次布置的两个负透镜和一个正透镜组成。 通过在光轴方向仅移动第一透镜组中间组来进行聚焦。 变焦透镜满足预定条件表达式。