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公开(公告)号：US20210181613A1
公开(公告)日：2021-06-17
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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22.发明申请公开(公告)号：US20180007270A1
公开(公告)日：2018-01-04
申请号：US15705286
申请日：2017-09-15
Applicant: FUJIFILM CORPORATION
Inventor： Tomonori MASUDA , Masaaki ORIMOTO , Hiroshi TAMAYAMA , Chikara YAMAMOTO
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 a detection unit, an optical path forming unit, a first reduction unit, based on a detection result of the detection unit, influence of variation of the optical axis of the image formation optical system, a second reduction unit that is disposed in a different part from a common optical path and reduces variation of the 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.
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公开(公告)号：US20170224201A1
公开(公告)日：2017-08-10
申请号：US15391206
申请日：2016-12-27
Applicant: FUJIFILM Corporation
Inventor： Chikara YAMAMOTO
CPC classification number: A61B1/00163 , G02B9/04 , G02B23/243 , G02B27/005
Abstract: The number of lenses within an objective lens for endoscopes is only three. The objective lens for endoscopes includes, in order from the object side, a first lens which is a single lens having a negative refractive power and a concave surface toward the object side, an aperture stop, and a cemented lens. The cemented lens is formed by cementing one positive lens and one negative lens together. Conditional formulae related to the distance from the surface toward the object side of the first lens to the aperture stop and the Abbe's numbers of the positive lens and the negative lens that constitute the cemented lens are satisfied.
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公开(公告)号：US20140043690A1
公开(公告)日：2014-02-13
申请号：US14054864
申请日：2013-10-16
Applicant: FUJIFILM Corporation
Inventor： Chikara YAMAMOTO
IPC: G02B9/34
Abstract: To provide a projection lens that is compact, lightweight, low-cost, and readily portable, a first lens having a positive power and at least one surface that is an aspheric surface; a second lens having a negative power and having a concave surface on the magnification side; a third lens having a positive power and having a convex surface on the reduction side; and a fourth lens having a positive power are arranged in order from the magnification side. In addition to arranging the lenses telecentrically on the reduction side, the following formulas are satisfied simultaneously, and images formed on the conjugation surface on the reduction side are enlarged and projected on the conjugation surface on the magnification side: formula (A) 0.8
Abstract translation: 为了提供一种具有正功率的第一透镜和至少一个非球面表面的紧凑，轻便，低成本且易于携带的投影透镜; 具有负功率并且在放大侧具有凹面的第二透镜; 第三透镜，具有正的功率并且在还原侧具有凸面; 并且具有正功率的第四透镜从放大侧依次布置。 除了将透镜以中心方式放置在还原侧之外，同时满足以下公式，并且在还原侧的共轭表面上形成的图像被放大并投影在放大倍率的共轭表面上：公式（A）0.8
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