公开(公告)号：US10168507B2

公开(公告)日：2019-01-01

申请号：US15717999

申请日：2017-09-28

Applicant: FUJIFILM Corporation

Inventor： Ryosuke Nagami ,  Tetsuya Ori

IPC: G02B13/00 ,  G02B9/26 ,  G02B7/09

Abstract: The imaging lens consists of, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power. The first lens group has a positive lens, a positive lens, and a negative lens successively in order from a position closest to the object side. The second lens group consists of one negative lens. The third lens group includes two or less lenses. During focusing, only the second lens group moves. The following conditional expression, which relates to a focal length f of the whole system in a state where the object at infinity is in focus and a focal length f2 of the second lens group, is satisfied: 0.4

公开(公告)号：US12007540B2

公开(公告)日：2024-06-11

申请号：US17188021

申请日：2021-03-01

Applicant: FUJIFILM Corporation

Inventor： Taiga Noda ,  Ryosuke Nagami

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

CPC classification number: G02B15/1461 ,  G02B15/20 ,  G02B27/0025

Abstract: A zoom lens consists of, in order from an object side to an 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. During zooming from the wide angle end to the telephoto end, the distance between the adjacent lens groups in the optical axis direction changes, and the third lens group and the fifth lens group move integrally along the optical axis.

公开(公告)号：US20230185167A1

公开(公告)日：2023-06-15

申请号：US18163847

申请日：2023-02-02

Applicant: FUJIFILM Corporation

Inventor： Takeya ABE ,  Keito Kamio ,  Ryosuke Nagami ,  Shinichiro Fujiki ,  Kazuaki Okamori ,  Yuya Sakai

IPC: G03B17/14 ,  G02B7/10 ,  H04N23/51 ,  H04N23/55

CPC classification number: G03B17/14 ,  G02B7/10 ,  H04N23/51 ,  H04N23/55

Abstract: A lens unit includes a guided portion that includes a first bearing portion and a second bearing portion disposed to be spaced apart from each other in a direction X and is slidably supported by a guide shaft, and a lens holding member. The lens unit includes a first tilt-preventing member having a linear expansion coefficient lower than a linear expansion coefficient of the lens holding member. The first tilt-preventing member is fixed to a region of the guided portion positioned between the first bearing portion and second bearing portion.

公开(公告)号：US11561367B2

公开(公告)日：2023-01-24

申请号：US17815097

申请日：2022-07-26

Applicant: FUJIFILM Corporation

Inventor： Ryosuke Nagami ,  Tetsuya Ori

IPC: G02B9/12 ,  H04N5/225

Abstract: The imaging lens includes, as lens groups, only a positive first lens group, a positive second lens group, and a negative third lens group in order from the object side. An aperture stop is disposed between a lens surface closest to the image side in the first lens group and a lens surface closest to the object side in the third lens group. During focusing, the first lens group and the third lens group do not move, and the second lens group moves. The first lens group consists of a negative lens and a positive lens in order from the object side. The third lens group has a negative lens and a positive lens in order from the object side.

公开(公告)号：US11442245B2

公开(公告)日：2022-09-13

申请号：US16689275

申请日：2019-11-20

Applicant: FUJIFILM Corporation

Inventor： Ryosuke Nagami ,  Tetsuya Ori

IPC: G02B9/12 ,  H04N5/225

Abstract: The imaging lens includes, as lens groups, only a positive first lens group, a positive second lens group, and a negative third lens group in order from the object side. An aperture stop is disposed between a lens surface closest to the image side in the first lens group and a lens surface closest to the object side in the third lens group. During focusing, the first lens group and the third lens group do not move, and the second lens group moves. The first lens group consists of a negative lens and a positive lens in order from the object side. The third lens group has a negative lens and a positive lens in order from the object side.

公开(公告)号：US11360289B2

公开(公告)日：2022-06-14

申请号：US16915763

申请日：2020-06-29

Applicant: FUJIFILM Corporation

Inventor： Ryosuke Nagami

IPC: G02B7/14 ,  G02B9/34 ,  G02B15/177 ,  G02B27/64 ,  H04N5/225 ,  G02B27/00 ,  G02B15/14 ,  G02B13/00

Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.