公开(公告)号：US09261678B2

公开(公告)日：2016-02-16

申请号：US14582843

申请日：2014-12-24

Applicant: FUJIFILM Corporation

Inventor： Noboru Koizumi ,  Michio Cho

IPC: G02B13/04 ,  G02B13/06 ,  G02B9/64

CPC classification number: G02B13/04 ,  G02B9/64 ,  G02B13/06

Abstract: A wide angle lens consists of a first lens group having negative refractive power as a whole, a second lens group having positive refractive power as a whole, and a third lens group having positive refractive power as a whole in this order from an object side. The first lens group consists of a positive meniscus lens with its convex surface facing the object side and three negative meniscus lenses, each with its convex surface facing the object side, in this order from the object side. The second lens group includes at least two cemented lenses. The third lens group consists of a 3a-th lens group consisting of a positive meniscus lens with its convex surface facing the object side and a 3b-th lens group that includes at least two cemented lenses and has positive refractive power as a whole, in this order from the object side.

Abstract translation: 广角镜头由具有整体的负屈光力的第一透镜组，整体上具有正折射光焦度的第二透镜组和从物体侧开始依次具有正折射力的第三透镜组。 第一透镜组由其面朝向物体侧的凸形表面的正弯月形透镜和从物体侧起依次具有三个负弯月形透镜，每个具有凸面朝向物体侧。 第二透镜组包括至少两个胶合透镜。 第三透镜组包括由其凸面朝向物体侧的正弯月形透镜组成的第3a透镜组和包括至少两个胶合透镜并具有整体正屈光力的第3b透镜组， 这个顺序从物体方面。

公开(公告)号：US09389399B2

公开(公告)日：2016-07-12

申请号：US14580740

申请日：2014-12-23

Applicant: FUJIFILM Corporation

Inventor： Noboru Koizumi

IPC: G02B13/04 ,  G02B13/06 ,  G02B9/64

CPC classification number: G02B13/04 ,  G02B9/64 ,  G02B13/06

Abstract: A wide angle lens includes a first lens group having negative refractive power, as a whole, a second lens group having positive refractive power, as a whole, and a third lens group having positive refractive power, as a whole, in this order from an object side. The first lens group includes a positive meniscus lens with its convex surface facing the object side and three negative meniscus lenses, each with its convex surface facing the object side, in this order from the object side. The second lens group includes at least one cemented lens. The material of at least one of the three negative meniscus lenses in the first lens group satisfies the following conditional expression (1), and the material of at least one of the other negative meniscus lenses in the first lens group satisfies the following conditional expressions (2) and (3): νda>81  (1); νdb 0.015  (3).

Abstract translation: 广角透镜从整体上包括具有负折光力的第一透镜组，整体上具有正折射光焦度的第二透镜组和具有正折射光焦度的第三透镜组， 物体侧。 第一透镜组从物体侧依次包括其凸表面朝向物体侧的正弯月形透镜和三个负弯月形透镜，每个具有其凸面朝向物体侧。 第二透镜组包括至少一个胶合透镜。 第一透镜组中的三个负弯月透镜中的至少一个的材料满足以下条件表达式（1），并且第一透镜组中的至少一个其它负弯月透镜的材料满足以下条件表达式 2）和（3）：＆ngr; da> 81（1）; ＆ngr; db <25（2）; 和＆Dgr;＆thetas; gFb> 0.015（3）。

公开(公告)号：US09625681B2

公开(公告)日：2017-04-18

申请号：US14864772

申请日：2015-09-24

Applicant: FUJIFILM Corporation

Inventor： Noboru Koizumi ,  Hideo Kanda ,  Michio Cho

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

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

Abstract: An imaging lens consists of five lenses consisting of, in order from the object side, a biconvex first lens, a biconcave second lens, a positive third lens having a meniscus shape with the convex surface toward the image side, a positive fourth lens having a meniscus shape with the convex surface toward the image side, and a negative fifth lens having a concave surface toward the image side, and having at least one inflection point on the image-side surface thereof, wherein condition expression (1), 0

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：US09279957B2

公开(公告)日：2016-03-08

申请号：US14224088

申请日：2014-03-25

Applicant: FUJIFILM CORPORATION

Inventor： Hideo Kanda ,  Takayuki Noda ,  Noboru Koizumi ,  Tatsuyuki Ogino ,  Michio Cho ,  Kazumi Koike

IPC: G02B9/60 ,  G02B13/00

CPC classification number: G02B13/0045 ,  G02B9/60

Abstract: An imaging lens substantially consists of, in order from an object side, five lenses of a first lens that has a positive refractive power and has a meniscus shape which is convex toward the object side, a second lens that has a negative refractive power, a third lens that has a negative refractive power, a fourth lens that has a positive refractive power, and a fifth lens that has a negative refractive power and has an aspheric shape of which an image side surface has an extreme point. Further, the imaging lens satisfies a predetermined conditional expression.

Abstract translation: 成像透镜基本上由物体侧依次包括具有正折光力并具有向物体侧凸出的弯月形状的第一透镜的五个透镜，具有负折光力的第二透镜， 具有负屈光力的第三透镜，具有正折光力的第四透镜和具有负折射光焦度并且具有图像侧表面具有极值点的非球面形状的第五透镜。 此外，成像透镜满足预定条件表达式。