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公开(公告)号：US20250151988A1
公开(公告)日：2025-05-15
申请号：US18916774
申请日：2024-10-16
Applicant: FUJIFILM CORPORATION
Inventor： Tomoyuki BABA
Abstract: The objective lens for an endoscope consists of, from an object side to an image side, a first lens group having positive optical power and a second lens group having positive optical power. During focusing, only the second lens group moves. The first lens group includes a single lens that has negative optical power closest to the object side. The objective lens for an endoscope satisfies conditional expressions determined in advance related to a maximum image height, a focal length of a whole system, a maximum half angle of view, a focal length of the first lens group, a focal length of the second lens group, and a focal length of the single lens of the first lens group.
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公开(公告)号：US20210364779A1
公开(公告)日：2021-11-25
申请号：US17328243
申请日：2021-05-24
Applicant: FUJIFILM Corporation
Inventor： Tomoyuki BABA
Abstract: An objective lens for an endoscope includes only four lens groups as lens groups, and the four lens groups consist of a negative first lens group, a positive second lens group, a negative third lens group, and a positive fourth lens group that are arranged in this order from an object side. The first lens group is fixed and the second and third lens groups are moved during focusing on an object positioned at the nearest point from an object positioned at the farthest point. The objective lens for an endoscope satisfies a predetermined conditional expression related to a focal length of an entire system and a focal length of the third lens group.
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公开(公告)号：US20140307327A1
公开(公告)日：2014-10-16
申请号：US14226220
申请日：2014-03-26
Applicant: FUJIFILM Corporation
Inventor： Yukiko NAGATOSHI , Tomoyuki BABA
IPC: G02B13/04
Abstract: A projection lens that projects image information displayed on the reduction side conjugate position onto the magnification side conjugate position includes an aspherical lens having a positive refractive power that satisfies predetermined conditional expressions and, when the back focus of the entire system is taken as Bf, the focal length of the entire system is taken as f, the maximum effective image circle diameter on the reduction side is taken as Imφ, and the distance from the reduction side conjugate position to the reduction side pupil position is taken as dexp, satisfies conditional expressions (6): Bf/f>2 and (7): 0.5
Abstract translation: 将显示在缩小侧共轭位置上的图像信息投影到倍率共轭位置的投影透镜包括具有满足预定条件表达式的正屈光力的非球面透镜，并且当整个系统的后焦点被取为Bf时， 将整个系统的焦距作为f，将还原侧的最大有效像圆直径作为Im＆phgr，将从缩小侧共轭位置到缩小侧光瞳位置的距离取为dexp，满足条件式 （6）：Bf / f> 2和（7）：0.5 <| Im＆phgr; / dexp | <1。
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公开(公告)号：US20130242272A1
公开(公告)日：2013-09-19
申请号：US13874676
申请日：2013-05-01
Applicant: FUJIFILM CORPORATION
Inventor： Tomoyuki BABA
CPC classification number: G03B21/008 , G02B26/00 , G03B21/2013 , G03B21/2066 , H04N9/3111 , H04N9/315 , H04N9/3152
Abstract: In an illumination optical system for a DMD type projector, the TIR prism is configured such that a projection line, which is a normal to the total reflection surface vertically projected on the DMD surface, forms an angle other than 90° with a micromirror turning axis, an exit light projection line, which is a principal ray of light beam exits from the total reflection surface vertically projected on the DMD surface, forms an angle of 90° with the micromirror turning axis, and an incident light projection line, which is a principal ray of light beam incident on the total reflection surface vertically projected on the DMD surface, is located on the same side as the exit light projection line with respect to a straight line passing through an end point of the incident light projection line and extending parallel to a long side of the DMD.
Abstract translation: 在用于DMD型投影仪的照明光学系统中，TIR棱镜被配置为使得垂直投影在DMD表面上的与全反射面垂直的垂直投影线与微镜转动轴成90度以外的角度 作为垂直投影在DMD面的全反射面离开的光束的出射光投射线与微反射镜转动轴成90°角，入射光投射线为 入射在垂直投影在DMD表面上的全反射面上的主光束相对于穿过入射光投射线的端点的直线与出射光投射线位于同一侧，平行延伸 到DMD的长边。
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公开(公告)号：US20180059418A1
公开(公告)日：2018-03-01
申请号：US15664049
申请日：2017-07-31
Applicant: FUJIFILM Corporation
Inventor： Tomoyuki BABA
CPC classification number: G02B27/0149 , B60K35/00 , B60K37/02 , B60K2350/1072 , B60K2350/2052 , B60K2350/352 , G02B5/0273 , G02B7/182 , G02B27/0101 , G02B2027/011 , G02B2027/0145 , G02B2027/015 , G02B2027/0154 , G03B21/10 , G03B21/142 , G03B21/28 , G03B21/62 , G03B29/00
Abstract: A head-up display device is improved in performance by a reduction in size and the satisfactory correction of optical aberration. A head-up display device includes an image display surface that displays an image, a reflective optical surface that is disposed at a position facing an predetermined observation position of an observer, and a projection optical system that projects the image displayed on the image display surface to the reflective optical surface disposed at the predetermined observation position and allows the observer to visually recognize the enlarged image as a virtual image. In a case in which an optical path, which extends from a center of the image display surface and reaches a center of an eye box, is referred to as an optical axis, the projection optical system includes a first mirror and a second mirror in this order from the image display surface and Conditional Expression (1) is satisfied.
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Patent Agency Ranking
公开(公告)号：US20160077332A1
公开(公告)日：2016-03-17
申请号：US14834747
申请日：2015-08-25
Applicant: FUJIFILM Corporation
Inventor： Tomoyuki BABA , Michio CHO
CPC classification number: G02B13/16 , G02B9/62 , G02B27/149
Abstract: An optical system consists essentially of, in order from the magnification side, a first lens having a positive refractive power with a convex surface on the magnification side, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, and a sixth lens having a positive refractive power, wherein the following conditional expressions (1) and (2) are satisfied: 0.17
Abstract translation: 光学系统基本上由放大倍率依次组成具有正屈光力的第一透镜和放大倍率侧的凸面，具有负屈光力的第二透镜，具有负屈光力的第三透镜， 具有正折光力的第四透镜，具有正折光力的第五透镜和具有正折光力的第六透镜，其中满足以下条件表达式（1）和（2）：0.17
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公开(公告)号：US20150268545A1
公开(公告)日：2015-09-24
申请号：US14660957
申请日：2015-03-18
Applicant: FUJIFILM Corporation
Inventor： Tomoyuki BABA
IPC: G03B21/20
CPC classification number: G03B21/2066 , G03B21/008 , G03B21/208
Abstract: A projection-type display apparatus includes a light source unit, a first optical system that rays from the light source unit enter, a second optical system that rays from the first optical system enter, an image display device that rays from the second optical system enter, and a projection lens that magnifies and projects an optical image formed by rays that have been optically modulated by the image display device onto a screen. The second optical system is configured to pass again the rays that have been output from the image display device, and to make the rays enter the projection lens. The first optical system includes at least one reflective optical element, and the second optical element consists essentially of two positive lenses.
Abstract translation: 投影型显示装置包括：光源单元，来自光源单元的射线的第一光学系统，来自第一光学系统的射线入射的第二光学系统，来自第二光学系统的射线进入的图像显示装置 以及将由图像显示装置进行了光学调制的光线形成的光学图像放大并投影到屏幕上的投影透镜。 第二光学系统被配置为再次通过从图像显示装置输出的光线，并使光线进入投影透镜。 第一光学系统包括至少一个反射光学元件，并且第二光学元件基本上由两个正透镜组成。
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公开(公告)号：US20150077722A1
公开(公告)日：2015-03-19
申请号：US14488720
申请日：2014-09-17
Applicant: FUJIFILM Corporation
Inventor： Tomoyuki BABA , Masanao KAWANA , Masaru AMANO , Takeshi KAMIYA
IPC: G03B21/28
CPC classification number: G03B21/28 , G02B15/177 , G02B17/08 , G02B17/0852 , G02B17/0856
Abstract: In a projection optical system that projects an image displayed on an image display device arranged on a reduction-side conjugate plane onto a magnification-side conjugate plane, as a magnified image, the projection optical system includes a refractive optical system and a reflective optical system having negative refractive power in this order from a reduction side. Further, the following conditional formula (1) is satisfied: L/D+2ωmin/ωmax≦1.01 (1).
Abstract translation: 在投影光学系统中，投影光学系统将投影在还原侧共轭面上的图像显示装置上显示的图像投影到倍率共轭面上作为放大图像，投影光学系统包括折射光学系统和反射光学系统 从还原侧依次具有负折射力。 此外，满足以下条件式（1）：L / D +2ωmin/ωmax＆nlE; 1.01（1）。
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公开(公告)号：US20220236553A1
公开(公告)日：2022-07-28
申请号：US17723590
申请日：2022-04-19
Applicant: FUJIFILM Corporation
Inventor： Tomoyuki BABA
Abstract: An objective optical system for an endoscope consists of, in order from an object side, a negative front group, an aperture stop, and a positive rear group. The front group includes, in order from the object side, only a negative first lens and a cemented lens formed of a negative second lens and a positive third lens cemented to each other, as lenses. The rear group includes, in order from the object side, only a positive fourth lens and a cemented lens formed of a positive fifth lens and a negative sixth lens cemented to each other, as lenses. The objective optical system for an endoscope satisfies predetermined conditional expressions.
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公开(公告)号：US20200271916A1
公开(公告)日：2020-08-27
申请号：US16801111
申请日：2020-02-25
Applicant: FUJIFILM Corporation
Inventor： Tomoyuki BABA
Abstract: An objective lens for an endoscope consists of a negative front group, an aperture stop, and a positive rear group that are arranged in this order from an object side. The front group includes only a negative first lens as a lens. The rear group includes only four lenses that consist of a positive second lens, a positive third lens, a fourth lens, and a fifth lens arranged in this order from the object side, as lenses. The fourth lens and the fifth lens have refractive power having signs different from each other and are cemented to each other. Conditional expression determined in advance about the focal lengths of the second lens and the rear group is satisfied.
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