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公开(公告)号：US12270976B2
公开(公告)日：2025-04-08
申请号：US17511799
申请日：2021-10-27
Inventor： Tsuneo Uchida , Katsu Yamada , Satoshi Kuzuhara
Abstract: An optical system according to the present disclosure includes a first sub-optical system including an aperture stop and a second sub-optical system including a prism. The prism has a first transmission surface located on the reduction side, a second transmission surface located on the magnification side, and at least one reflection surface located on the optical path between the first transmission surface and the second transmission surface. A first reflection surface closest to the intermediate imaging position has a shape with a concave surface facing a direction into which a light ray incident on first the reflection surface is reflected. A curvature shape of the first reflection surface is set such that some of multiple principal rays passing through the reduction conjugate point intersect on the optical path between the first reflection surface and the second transmission surface.
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公开(公告)号：US20240319485A1
公开(公告)日：2024-09-26
申请号：US18679937
申请日：2024-05-31
Inventor： Tsuneo Uchida , Satoshi Kuzuhara
CPC classification number: G02B17/0816 , G02B13/16
Abstract: The present disclosure is directed to an optical system having a reduction conjugate point on a reduction side and a magnification conjugate point on a magnification side, and internally having an intermediate imaging position having a conjugate relationship with each of the reduction conjugate point and the magnification conjugate point, the optical system including: a prism provided on the magnification side, the prism formed of a transparent medium; and a sub-optical system provided between the reduction conjugate point and the prism, the sub-optical system, wherein the prism includes a first transmission surface positioned on the reduction side, a second transmission surface positioned on the magnification side, and at least one reflection surface positioned therebetween, wherein the following Expression is satisfied: 0.40
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公开(公告)号：US11187968B2
公开(公告)日：2021-11-30
申请号：US16742939
申请日：2020-01-15
Inventor： Tsuneo Uchida , Katsu Yamada
Abstract: An image projection device includes an image display element that forms a projection image, a transmissive optical system that is disposed on an emission surface side of the image display element and includes a diaphragm and a plurality of lenses, and a reflection optical system that includes a first mirror reflecting light emitted from the transmissive optical system and having positive power and a second mirror that is a plane mirror for reflecting light reflected by the first mirror on a projection surface. The first mirror is disposed between the second mirror and the projection surface in a direction along an optical axis of the transmissive optical system. An intermediate image is formed between the transmissive optical system and the first mirror.
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公开(公告)号：US10444612B2
公开(公告)日：2019-10-15
申请号：US15906365
申请日：2018-02-27
Inventor： Tsuneo Uchida , Katsu Yamada
Abstract: A projection optical system is an optical system for projecting an image light flux formed in an image display element onto a projection surface, and includes a transmission optical system and a reflection optical system. The transmission optical system is located on an emission surface side of the image display element and includes a stop and a plurality of lenses. The reflection optical system includes a positive-power first mirror and a second mirror. Conditional Expression (1) is satisfied 0
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Patent Agency Ranking
公开(公告)号：US09927684B2
公开(公告)日：2018-03-27
申请号：US15464585
申请日：2017-03-21
Inventor： Tsuneo Uchida , Katsu Yamada
CPC classification number: G03B21/147 , G02B13/16 , G02B13/18 , G02B17/08 , G02B17/0852 , G03B21/28
Abstract: A projection optical system projects onto a projection surface an image ray bundle formed on an image display element, and includes a transmissive optical system positioned on a side of an emission surface of the image display element and having positive power, and a reflective optical system including at least one mirror for reflecting, toward the projection surface, light rays emitted from the transmissive optical system. The transmissive optical system includes at least one positive lens disposed closer to the image display element than an aperture stop, along with first and second positive lenses having a meniscus shape, and a negative lens disposed therebetween, which are closer to the projection surface than the aperture stop is. During focusing, spacing between the first positive lens and the negative lens and spacing between the second positive lens and the negative lens remain unchanged.
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公开(公告)号：US09488813B2
公开(公告)日：2016-11-08
申请号：US14818156
申请日：2015-08-04
Inventor： Satoshi Kuzuhara , Tsuneo Uchida
IPC: G02B15/14 , G02B15/20 , G02B15/16 , G02B27/64 , G02B7/10 , G02B7/14 , H04N5/232 , H04N5/225 , G02B13/00 , G02B15/173
CPC classification number: G02B15/20 , G02B7/10 , G02B7/14 , G02B13/009 , G02B15/16 , G02B15/173 , G02B27/646 , H04N5/2254 , H04N5/23296
Abstract: A zoom lens system comprising a positive first lens unit; a negative second lens unit; and subsequent five or six lens units, wherein an aperture diaphragm is provided, intervals between the adjacent lens units vary in zooming, the first lens unit moves in zooming and is fixed in focusing, and the conditions: BF/fW 0.42, and DAIR/Y
Abstract translation: 一种变焦透镜系统，包括正的第一透镜单元; 负第二透镜单元; 以及随后的五个或六个透镜单元，其中设置孔径光阑，相邻透镜单元之间的间隔变化变化，第一透镜单元在变焦中移动并且在聚焦中固定，并且条件：BF / fW <0.66，DA / LW> 0.42，DAIR / Y <2.00（BF：从最像像侧透镜元件的图像侧表面顶点到图像面的距离，fW：广角极限系统的焦距，DA：总和 系统中透镜单元的光学轴向厚度，LW：广角限制下的系统总长度，DAIR：构成广角范围的系统的透镜元件之间的最大空气间距，Y = fT×tan（ωT） fT：远摄极限系统的焦距，ωT：远摄极限的半视角）。
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公开(公告)号：US12189103B2
公开(公告)日：2025-01-07
申请号：US17405723
申请日：2021-08-18
Inventor： Satoshi Kuzuhara , Tsuneo Uchida
Abstract: The present disclosure provides an optical system that includes a prism having an incident surface, an exit surface, and one or more reflecting surfaces. The optical system includes a first scanning element configured to scan in a first direction a light that enters and reflect the light in a direction of the incident surface of the prism, and a second scanning element configured to scan in a second direction the light that exits from the exit surface of the prism, the second direction being orthogonal to the first direction. The incident surface of the prism has a convex shape with respect to the first scanning element.
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公开(公告)号：US12007557B2
公开(公告)日：2024-06-11
申请号：US17398135
申请日：2021-08-10
Inventor： Satoshi Kuzuhara , Tsuneo Uchida
CPC classification number: G02B26/108 , G02B26/101 , G02B27/0081 , G02B5/04
Abstract: The present disclosure provides an optical system that includes a prism having an incident surface, an exit surface, and one or more reflecting surfaces. The optical system includes a first scanning element configured to scan a light that enters and has a plurality of wavelengths in a first direction, and reflect the light in a direction of the incident surface of the prism. The optical system includes a second scanning element configured to scan in a second direction the light that exits from the exit surface of the prism, the second direction being orthogonal to the first direction. The incident surface of the prism has a concave shape with respect to the first scanning element.
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公开(公告)号：US10928720B2
公开(公告)日：2021-02-23
申请号：US16577887
申请日：2019-09-20
Inventor： Tsuneo Uchida , Katsu Yamada
Abstract: A projection optical system is a projection optical system for projecting an image in an image display element on a projection target surface in an enlarged manner, and includes a transmissive optical system and a reflection optical system. The transmissive optical system includes a plurality of lenses and an aperture diaphragm. The reflection optical system includes a first reflecting surface that reflects light emitted from the transmissive optical system and a second reflecting surface that reflects light emitted from the first reflecting surface. A principal ray of the reference rays is a ray passing through a center of the aperture diaphragm among the reference rays. Local power of the first reflecting surface at a position where the principal ray enters the first reflecting surface is larger than local power of the second reflecting surface at a position where the principal ray enters the second reflecting surface.
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