公开(公告)号：US20240353652A1

公开(公告)日：2024-10-24

申请号：US18638523

申请日：2024-04-17

Applicant: FUJIFILM Corporation

Inventor： Yuya HIRAKAWA ,  Masato KONDO ,  Shunsuke MIYAGISHIMA ,  Yasutaka SHIMADA

IPC: G02B9/12

CPC classification number: G02B9/12

Abstract: An imaging lens consists of, in order from the object side to the image side, a first lens group, a stop, a second lens group, and a third lens group. At least a spacing between the second lens group and the third lens group changes during focusing. The number of lenses included in the imaging lens is equal to or greater than 7 and equal to or less than 10. The imaging lens satisfies predetermined conditional expressions.

公开(公告)号：US20240045310A1

公开(公告)日：2024-02-08

申请号：US18465331

申请日：2023-09-12

Applicant: FUJIFILM Corporation

Inventor： Hiroki SAITO ,  Shunsuke MIYAGISHIMA ,  Kosuke TAKAHASHI ,  Tomoki OTSUKI

IPC: G03B13/16 ,  G02B15/15 ,  G02B17/08 ,  H04N23/69 ,  G02B15/14

CPC classification number: G03B13/16 ,  G02B15/15 ,  G02B17/0896 ,  G02B17/0888 ,  H04N23/69 ,  G02B15/144113

Abstract: A finder includes, in order from an object side to an eye point side, an objective optical system that forms an intermediate image, and an ocular optical system that is provided for observation of the intermediate image. The intermediate image is positioned on the optical path between the objective optical system and the ocular optical system. The finder includes a plurality of reflecting surfaces for forming an erect image, and each of the objective optical system and the ocular optical system has at least one of the plurality of reflecting surfaces. The finder satisfies a conditional expression: 2

公开(公告)号：US20230324767A1

公开(公告)日：2023-10-12

申请号：US18178318

申请日：2023-03-03

Applicant: FUJIFILM Corporation

Inventor： Makoto KOBORI ,  Shunsuke MIYAGISHIMA ,  Hiroki SAITO

IPC: G03B13/06 ,  G02B15/14

CPC classification number: G03B13/06 ,  G02B15/142

Abstract: Provided is a finder device capable of preventing dust on a display surface of a display element and reducing an influence of heat which is generated from the display element on an optical system.
An EVF 1 includes: an optical system 20 that includes a display element 10, a first lens group G1 disposed in order from the display element 10 side, and a second lens group G2; a first holding frame 30 that holds the display element 10 and the first lens group G1 to seal a space between the display element 10 and the first lens group G1; a second holding frame that holds the second lens group G2; and a diopter adjustment unit 50 that adjusts a diopter by integrally moving the display element 10 and the first lens group G1 relative to the second lens group G2.

公开(公告)号：US20210231930A1

公开(公告)日：2021-07-29

申请号：US17150097

申请日：2021-01-15

Applicant: FUJIFILM Corporation

Inventor： Shunsuke MIYAGISHIMA

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

Abstract: An imaging lens consisting of, in order from an object side to an image side: a first lens group; a second lens group that has a positive refractive power; and a third lens group that has a negative refractive power, wherein the first lens group includes, successively in order from a position closest to the object side to the image side, two negative lenses and a positive lens, the second lens group includes a positive lens and a negative lens, during focusing from an object at infinity to a closest object, the first lens group remains stationary with respect to an image plane, and the second lens group moves along an optical axis, and assuming that a focal length of the first lens group is f1, and a focal length of the second lens group is f2, Conditional Expression (1) is satisfied: −0.5

公开(公告)号：US20190391368A1

公开(公告)日：2019-12-26

申请号：US16444793

申请日：2019-06-18

Applicant: FUJIFILM Corporation

Inventor： Shunsuke MIYAGISHIMA

IPC: G02B13/00 ,  G02B9/64

Abstract: The imaging lens consists of, in order from the object side, a positive first lens group, a stop, a positive second lens group, and a negative third lens group. Lenses arranged first and second from the object side are both negative single lenses having convex surfaces toward the object side. The second lens group includes a cemented lens in which a negative lens and a positive lens are cemented. During focusing, only the second lens group moves. Assuming that focal lengths of the first lens group and the second lens group are f1 and f2, respectively, the imaging lens satisfies 0.7

公开(公告)号：US20180210178A1

公开(公告)日：2018-07-26

申请号：US15873364

申请日：2018-01-17

Applicant: FUJIFILM Corporation

Inventor： Hiroki SAITO ,  Shunsuke MIYAGISHIMA

IPC: G02B13/06 ,  G02B3/00 ,  G02B3/04 ,  G02B9/64 ,  G02B15/14

CPC classification number: G02B13/06 ,  G02B3/0037 ,  G02B3/04 ,  G02B9/64 ,  G02B13/0045 ,  G02B15/14 ,  G02B2207/117

Abstract: The imaging lens consists of a first lens group fixed to an image plane during focusing, an aperture stop, a second lens group having a positive refractive power which moves along an optical axis during focusing, and a third lens group fixed to the image plane during focusing, in order from an object side. The first lens group includes at least two negative lenses among three lenses from a lens closest to the object side to a third lens, a negative lens of the at least two negative lenses closest to the object side being a negative meniscus lens with its convex surface toward the object side, the second lens group includes at least three lenses, and the third lens group includes at least three lenses.

公开(公告)号：US20240004167A1

公开(公告)日：2024-01-04

申请号：US18470035

申请日：2023-09-19

Applicant: FUJIFILM Corporation

Inventor： Shunsuke MIYAGISHIMA ,  Hiroki SAITO ,  Kosuke TAKAHASHI ,  Tomoki OTSUKI

IPC: G02B13/00 ,  H04N23/951

CPC classification number: G02B13/0045 ,  H04N23/951 ,  G02B27/646

Abstract: The imaging lens includes, successively in order from a position closest to an object side: a first lens group that remains stationary with respect to an image plane during focusing; and a focus lens group that moves along an optical axis during focusing. Assuming that a maximum image height is Ymax, and a focal length of the imaging lens is f, and a sum of a back focal length in terms of an air-equivalent distance and a distance on the optical axis from a lens surface closest to the object side to a lens surface closest to the image side is TL, the imaging lens satisfies Conditional Expressions (1) and (2).


0.1

公开(公告)号：US20230115405A1

公开(公告)日：2023-04-13

申请号：US17932228

申请日：2022-09-14

Applicant: FUJIFILM Corporation

Inventor： Hiroki SAITO ,  Shunsuke MIYAGISHIMA

IPC: G02B25/00 ,  G02B9/60 ,  G02B7/02

Abstract: An observation optical system includes a display element and an eyepiece lens arranged on an eyepoint side of the display element. The eyepiece lens includes at least one negative lens. In a case where a half value of a longest diameter of a display region in the display element is denoted by H, and a focal length of the eyepiece lens is denoted by f, the observation optical system satisfies a conditional expression represented by 0.35

公开(公告)号：US20220404607A1

公开(公告)日：2022-12-22

申请号：US17836832

申请日：2022-06-09

Applicant: FUJIFILM Corporation

Inventor： Shunsuke MIYAGISHIMA

IPC: G02B25/00 ,  G02B9/34

Abstract: An observation optical system includes a display element and an eyepiece lens arranged on an eyepoint side of the display element. The eyepiece lens consists of a first lens having positive refractive power, a second lens having negative refractive power, and a rear side lens group including two or more lenses consecutively in order from a side closest to the display element to the eyepoint side. In a case where a half value of a longest diameter of a display region in the display element is denoted by H, and a focal length of the eyepiece lens is denoted by f, the observation optical system satisfies a conditional expression represented by 0.3

公开(公告)号：US20200382684A1

公开(公告)日：2020-12-03

申请号：US16882175

申请日：2020-05-22

Applicant: FUJIFILM Corporation

Inventor： Shunsuke MIYAGISHIMA

IPC: H04N5/225 ,  G02B9/10 ,  G02B9/12

Abstract: The finder includes, in order from an object side to an eye point side, a negative objective lens group, and a positive eyepiece lens group. The eyepiece lens group consists of, in order from the object side to the eye point side, a negative first lens, a positive second lens, and a negative third lens. During diopter adjustment, only the second lens moves. The finder satisfies a conditional expression determined in advance.