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：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。

公开(公告)号：US20230043840A1

公开(公告)日：2023-02-09

申请号：US17812655

申请日：2022-07-14

Applicant: FUJIFILM Corporation

Inventor： Hiroki SAITO ,  Tatsuyuki OGINO ,  Masato KONDO ,  Takuya TANAKA

IPC: G02B15/14 ,  G02B15/16 ,  G02B13/00

Abstract: A zoom lens consisting of, in order from an object side to an image side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; and a subsequent group that has a plurality of lens groups, wherein: the zoom lens includes an aperture stop at a position closer to the image side than a lens surface closest to the image side in the second lens group, a lens group closest to the image side in the subsequent group includes at least one negative lens of which an object side lens surface is a concave surface being in contact with air, during zooming, a spacing between the first lens group and the second lens group changes, a spacing between the second lens group and the subsequent group changes, and spacings between all adjacent lens groups in the subsequent group change.

公开(公告)号：US20140293453A1

公开(公告)日：2014-10-02

申请号：US14226172

申请日：2014-03-26

Applicant: FUJIFILM CORPORATION

Inventor： Tatsuyuki OGINO ,  Michio CHO ,  Yoshiaki ISHII

IPC: G02B13/00

CPC classification number: G02B13/0045

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 biconcave shape, a third lens that has a meniscus shape which is convex toward the object side, a fourth lens that has a meniscus shape which is convex toward the image side; and a fifth lens that has a negative refractive power and has at least one inflection point on an image side surface. Further, the following conditional expression (1) is satisfied. 1.4

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，具有双凹形状的第二透镜，第三透镜 具有向物体侧凸出的弯月形状的透镜，具有向图像侧凸出的弯月形状的第四透镜; 以及具有负屈光力并且在图像侧表面上具有至少一个拐点的第五透镜。 此外，满足以下条件式（1）。 1.4