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公开(公告)号：US10809520B2
公开(公告)日：2020-10-20
申请号：US16136633
申请日：2018-09-20
Applicant: FUJIFILM Corporation
Inventor： Chikara Yamamoto
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
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公开(公告)号：US09645382B2
公开(公告)日：2017-05-09
申请号：US14323169
申请日：2014-07-03
Applicant: FUJIFILM CORPORATION
Inventor： Chikara Yamamoto
IPC: G02B23/24
CPC classification number: G02B23/243 , G02B23/2438
Abstract: An objective lens for an endoscope focuses from a farthest point object to a nearest point object by moving, along optical axis Z, at least one lens group excluding a most object-side lens group. The objective lens satisfies the formulae: 1.2≦ft/fw, and 0.0
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公开(公告)号：US09285564B2
公开(公告)日：2016-03-15
申请号：US14515727
申请日：2014-10-16
Applicant: FUJIFILM Corporation
Inventor： Chikara Yamamoto
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）。
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公开(公告)号：US08947785B2
公开(公告)日：2015-02-03
申请号：US14252075
申请日：2014-04-14
Applicant: FUJIFILM Corporation
Inventor： Chikara Yamamoto
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。
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公开(公告)号：US11378873B2
公开(公告)日：2022-07-05
申请号：US17185389
申请日：2021-02-25
Applicant: FUJIFILM Corporation
Inventor： Chikara Yamamoto
Abstract: A projection display device of a front projection type includes a light valve that modulates light based on image data and emits the light and an image forming optical system that projects an optical image of the light modulated by the light valve onto a projection surface, in which the image forming optical system includes a first optical system that includes at least one lens and a first reflection member that reflects the light emitted from the light valve toward the first optical system, the first optical system and the first reflection member are configured to be rotatable in a pitch direction, and the first reflection member rotates by a pitch angle θ/2 in conjunction with rotation of the first optical system by a pitch angle θ.
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Patent Agency Ranking
公开(公告)号：US10897603B2
公开(公告)日：2021-01-19
申请号：US16511008
申请日：2019-07-15
Applicant: FUJIFILM Corporation
Inventor： Kazuki Inoue , Chikara Yamamoto
Abstract: A projection display device includes an imaging element, a light source, a light valve that modulates light from the light source and emits modulated light, and an imaging optical system. The imaging optical system includes a first optical system that is used in common in projection and imaging, a second optical system that is used only in projection, a third optical system that is used only in imaging, and a separation member that separates an optical path from the second optical system toward the first optical system from an optical path from the first optical system toward the third optical system. The third optical system includes a first light shielding member that is arranged in the vicinity of a stop position of the third optical system and shields a part of a luminous flux.
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公开(公告)号：US09348207B2
公开(公告)日：2016-05-24
申请号：US13949901
申请日：2013-07-24
Applicant: FUJIFILM Corporation
Inventor： Chikara Yamamoto
CPC classification number: G03B21/208 , F21K9/61 , G02B6/0001 , G02B6/0096 , G02B27/0905 , G02B27/0994 , G03B21/2013 , G03B21/2033 , H04N9/3152
Abstract: An illuminating optical system suppresses deterioration in utilization efficiency of illuminating light and generation of fluctuations in light emission without increasing apparatus size. The illuminating optical system includes a plurality of light sources of different types, a light combining optical system that combines light beams output from each of the light sources such that they converge at a single position, and a rod integrator that uniformizes the light intensity distributions of the light beams which are converged at the single position that enter a first end thereof and outputs the light beams, of which the light intensity distribution has been uniformized, from a second end thereof. The light combining optical system includes relay optical component sets corresponding to each of the light sources, and the relay optical component sets have relay magnification ratios different from each other.
Abstract translation: 照明光学系统抑制照明光的利用效率的劣化和发光的波动的产生，而不增加设备的尺寸。 照明光学系统包括多个不同类型的光源，组合光学系统，其组合从每个光源输出的光束，使得它们在单个位置收敛;以及杆积分器，其将光强度分布均匀化 会聚在进入其第一端的单个位置处的光束从其第二端输出光强度分布均匀化的光束。 光组合光学系统包括对应于每个光源的中继光学组件组，并且中继光学组件具有彼此不同的中继放大率。
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公开(公告)号：US11592730B2
公开(公告)日：2023-02-28
申请号：US17402330
申请日：2021-08-13
Applicant: FUJIFILM Corporation
Inventor： Chikara Yamamoto
Abstract: The projection device includes a display element that displays an image, a projection optical system that forms an intermediate image of the image within an air space and projects the intermediate image to form a projected image, and a light shielding member that is disposed within the air space. The light shielding member includes a light shielding region which is positioned outside optical paths of all effective luminous fluxes emitted from the display element and used to form the projected image. The projection device satisfies a predetermined conditional expression.
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公开(公告)号：US11215907B2
公开(公告)日：2022-01-04
申请号：US16998563
申请日：2020-08-20
Applicant: FUJIFILM Corporation
Inventor： Kazuki Inoue , Chikara Yamamoto
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.
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公开(公告)号：US10897602B2
公开(公告)日：2021-01-19
申请号：US16511006
申请日：2019-07-15
Applicant: FUJIFILM Corporation
Inventor： Kazuki Inoue , Chikara Yamamoto
Abstract: A projection display device includes an imaging element, a light source, a light valve that modulates light from the light source and emits modulated light in a prescribed polarization state, and an imaging optical system. The imaging optical system includes a first optical system that is used in common in projection and imaging, a second optical system that is used only in projection, a third optical system that is used only in imaging, and a separation member that separates an optical path from the second optical system toward the first optical system from an optical path from the first optical system toward the third optical system. The first optical system comprises a quarter wave plate and a polarizer arranged in a state of transmitting the light emitted from the light valve.
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