公开(公告)号：US20200379324A1

公开(公告)日：2020-12-03

申请号：US16998563

申请日：2020-08-20

Applicant: FUJIFILM Corporation

Inventor： Kazuki INOUE ,  Chikara YAMAMOTO

IPC: G03B21/14 ,  G02B7/04 ,  G03B17/54

Abstract: An optical unit includes: a projection optical system on which light from a display unit is incident; a common optical system that projects light passing through the projection optical system to a projection target object and forms an image of a subject at a side of the projection target object; an optical member for guiding light passing through the projection optical system to the common optical system and guiding an intermediate image formed by at least a part of the common optical system to an imaging element; and an imaging optical system for forming the intermediate image on the imaging element, and an image forming position of the intermediate image is present between a component closest to a side of the projection target object among components constituting the common optical system and the optical member.

公开(公告)号：US20200278594A1

公开(公告)日：2020-09-03

申请号：US16800533

申请日：2020-02-25

Applicant: FUJIFILM Corporation

Inventor： Kazuki INOUE ,  Chikara YAMAMOTO

IPC: G03B21/14 ,  G02B13/16

Abstract: The projection display device includes an imaging element, a light valve, and an image-forming optical system that projects an optical image according to light emitted from the light valve onto a magnification side imaging surface and forms an image of light incident from a magnification side on an imaging element. The image-forming optical system includes a first optical system that comprises at least one lens and is used in common in projection and imaging, and a separation member that separates an optical path from the light valve toward the first optical system from an optical path from the first optical system toward the imaging element. An antireflection layer is comprised in at least one of antireflection target surfaces having a significant influence of ghost light.

公开(公告)号：US20190094517A1

公开(公告)日：2019-03-28

申请号：US16136954

申请日：2018-09-20

Applicant: FUJIFILM Corporation

Inventor： Chikara YAMAMOTO

IPC: G02B23/24 ,  A61B1/00

Abstract: An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface and forms the intermediate image on an imaging plane again, and is adapted to satisfy Conditional expressions (1) to (3) in a case in which a maximum effective image height on the imaging plane is denoted by HI, a focal length of the entire system is denoted by f, an effective luminous flux diameter on a lens surface closest to an object is denoted by FD, an F-Number of the entire system is denoted by FNo, and a paraxial relay magnification of the intermediate image on the imaging plane is denoted by R. 0.7

公开(公告)号：US20190094515A1

公开(公告)日：2019-03-28

申请号：US16135041

申请日：2018-09-19

Applicant: FUJIFILM Corporation

Inventor： Chikara YAMAMOTO

IPC: G02B23/24 ,  A61B1/00

Abstract: An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface, forms the intermediate image on an imaging plane again, and includes an aperture stop that is provided between the intermediate image and the imaging plane. Conditional expression (1) is satisfied in a case in which a distance between a lens surface closest to an object and a paraxial entrance pupil position on an optical axis is denoted by FS and a focal length of the entire system is denoted by f. |FS/f|

公开(公告)号：US20190094516A1

公开(公告)日：2019-03-28

申请号：US16136633

申请日：2018-09-20

Applicant: FUJIFILM Corporation

Inventor： Chikara YAMAMOTO

IPC: G02B23/24 ,  G02B9/64

CPC classification number: G02B23/243 ,  G02B9/64 ,  G02B23/2484

Abstract: An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface and forms the intermediate image on an imaging plane again, and is adapted to satisfy Conditional expressions (1) to (3) in a case in which a maximum effective image height on the imaging plane is denoted by HI, a focal length of the entire system is denoted by f, an effective luminous flux diameter on a lens surface closest to an object is denoted by FD, a maximum effective luminous flux diameter among effective luminous flux diameters on lens surfaces of the entire system is denoted by BD, and a paraxial relay magnification of the intermediate image on the imaging plane is denoted by βR. 0.7

公开(公告)号：US20180007271A1

公开(公告)日：2018-01-04

申请号：US15705287

申请日：2017-09-15

Applicant: FUJIFILM CORPORATION

Inventor： Tomonori MASUDA ,  Masaaki ORIMOTO ,  Hiroshi TAMAYAMA ,  Chikara YAMAMOTO

IPC: H04N5/232 ,  G01S17/08 ,  G01S7/481 ,  G01S7/497

CPC classification number: H04N5/23267 ,  G01C3/06 ,  G01S7/481 ,  G01S7/4814 ,  G01S7/4865 ,  G01S7/497 ,  G01S7/51 ,  G01S17/023 ,  G01S17/08 ,  G01S17/10 ,  H04N5/23245 ,  H04N5/23251 ,  H04N5/23258 ,  H04N5/23287 ,  H04N5/23293 ,  H04N5/23296

Abstract: A distance measurement device includes an emission unit, a detection unit, a first reduction unit that reduces, based on a detection result of the detection unit, influence of variation of an optical axis of the image formation optical system on the subject image received as light by the light receiving section, a second reduction unit that reduces variation of an optical axis of the directional light with respect to the subject based on the detection result of the detection unit, and a control unit that, in the case of operating the first reduction unit and the second reduction unit at the same time, controls the first reduction unit and the second reduction unit to reduce variation of an irradiation position of the directional light in the subject image received as light by the light receiving section.

公开(公告)号：US20160139378A1

公开(公告)日：2016-05-19

申请号：US14939597

申请日：2015-11-12

Applicant: FUJIFILM Corporation

Inventor： Chikara YAMAMOTO

IPC: G02B15/167 ,  G02B13/00 ,  G02B27/00 ,  G02B15/20

CPC classification number: G02B15/173 ,  G02B27/646

Abstract: A zoom lens is equipped with: a first lens group, which is fixed when changing magnification, provided most toward the magnification side; and a second lens group having a positive refractive power, which moves when changing magnification, provided adjacent to the first lens group at the reduction side thereof. The first lens group is constituted essentially by, in order from the magnification side to the reduction side, a front group having a positive refractive power and a rear group having a negative refractive power. Focusing operations are performed by changing the distance between the front group and the rear group. Conditional Formula (1): −0.3 5≦flb/ft

Abstract translation: 变焦镜头配备有：第一透镜组，其在改变倍率时被固定，最向着放大侧提供; 以及具有正折射力的第二透镜组，其在变化倍率时移动，在其还原侧与第一透镜组相邻设置。 第一透镜组基本上由从放大侧到缩小侧的顺序构成具有正折光力的前面组和具有负屈光力的后组。 通过改变前组与后组之间的距离来执行对焦操作。 条件公式（1）：-0.3 5＆nlE; flb / ft <0与后组的焦距flb和整个透镜系统在远摄端的焦距ft是一致的。

公开(公告)号：US20150036229A1

公开(公告)日：2015-02-05

申请号：US14515727

申请日：2014-10-16

Applicant: FUJIFILM Corporation

Inventor： Chikara YAMAMOTO

IPC: G02B13/16 ,  H04N9/31 ,  G02B13/18

CPC classification number: G02B9/62 ,  G02B13/0045 ,  G02B13/16 ,  G02B13/18 ,  G02B27/1026 ,  H04N9/317

Abstract: A lens for projection substantially consists of a negative first lens with its concave surface facing a reduction side, a positive second lens with its concave surface facing the reduction side, a negative third lens with its concave surface facing a magnification side, a positive fourth lens with its convex surface facing the reduction side, a positive fifth lens and a positive sixth lens in this order from the magnification side. The reduction side is telecentric. The following conditional formulas (1) and (2) about refractive power P4 of a reduction-side surface of the second lens, refractive power P5 of a magnification-side surface of the third lens, and focal length f of an entire system are satisfied: −3.0≦1/(P4×f)≦−0.4   (1); and −2.0≦1/(P5×f)≦−0.2   (2).

Abstract translation: 用于投影的透镜基本上由凹面朝向还原侧的负第一透镜，其凹面朝向还原侧的正第二透镜，其凹面朝向放大侧的负第三透镜，正第四透镜 其凸面朝向减速侧，从倍率侧依次为正的第五透镜和正的第六透镜。 减速侧是远心的。 关于第二透镜的还原侧表面的折射力P4，第三透镜​​的倍率侧表面的折射力P5和整个系统的焦距f的以下条件式（1）和（2） ：-3.0＆nlE; 1 /（P4×f）＆nlE; -0.4（1）; 和-2.0＆nlE; 1 /（P5×f）＆nlE; -0.2（2）。

公开(公告)号：US20140240855A1

公开(公告)日：2014-08-28

申请号：US14270728

申请日：2014-05-06

Applicant: FUJIFILM Corporation

Inventor： Chikara YAMAMOTO ,  Yoshiaki ISHII

IPC: G02B23/24

CPC classification number: G02B23/243 ,  A61B1/00188 ,  A61B1/0051 ,  G02B13/04

Abstract: An endoscope objective lens substantially consists of four lens groups consisting of, in order from the object side, a negative first lens group, a positive second lens group, a negative third lens group and a positive fourth lens group. During focusing from the farthest object to the nearest object, the first lens group is fixed, and the second lens group and the third lens group are moved along the optical axis. The third lens group includes a cemented lens that is formed by a positive lens and a negative lens cemented together in this order from the object side, and the cemented surface of the cemented lens is oriented such that the concave surface faces the object side.

Abstract translation: 内窥镜物镜基本上由从物体侧起依次由负的第一透镜组，正的第二透镜组，负的第三透镜组和正的第四透镜组组成的四个透镜组组成。 在从最远物体到最近物体的聚焦期间，第一透镜组被固定，并且第二透镜组和第三透镜组沿着光轴移动。 第三透镜组包括从物体侧依次从正透镜和负透镜形成的胶合透镜，并且胶合透镜的胶合表面被定向为使得凹面面向物体侧。

公开(公告)号：US20140218811A1

公开(公告)日：2014-08-07

申请号：US14252075

申请日：2014-04-14

Applicant: FUJIFILM Corporation

Inventor： Chikara YAMAMOTO

IPC: G02B23/24

CPC classification number: G02B23/243 ,  A61B1/00188 ,  A61B1/05 ,  G02B13/06

Abstract: The endoscope objective lens is configured such that focusing from the farthest object to the nearest object is achieved by moving at least one lens group other than the most object-side lens group along the optical axis. One of the at least one lens group to be moved during focusing is a negative lens group. The one negative lens group that is moved during the focusing consists of a cemented lens that is formed by a positive lens and a negative lens cemented together in this order from the object side. The cemented surface of the cemented lens is oriented such that the concave surface faces the object side. Given conditional expressions are satisfied.

Abstract translation: 内窥镜物镜被配置为使得从最远物体到最近物体的聚焦通过沿着光轴移动除了最物体侧透镜组之外的至少一个透镜组来实现。 聚焦期间要移动的至少一个透镜组中的一个是负透镜组。 在聚焦期间移动的一个负透镜组由从正面透镜和负透镜形成的胶合透镜从物体侧依次粘接在一起。 胶合透镜的胶合表面被定向为使得凹面面向物体侧。 给定条件表达式是满意的。