公开(公告)号：US20210373305A1

公开(公告)日：2021-12-02

申请号：US17404468

申请日：2021-08-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi KUZUHARA ,  Tsuneo UCHIDA

IPC: G02B17/08 ,  G02B17/00 ,  G02B26/10 ,  G02B27/00 ,  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. A first intermediate imaging position of a light flux in a first direction is located inside the prism. The first intermediate imaging position is different from a second intermediate imaging position of the light flux in a second direction orthogonal to the first direction.

公开(公告)号：US20170285451A1

公开(公告)日：2017-10-05

申请号：US15464585

申请日：2017-03-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tsuneo UCHIDA ,  Katsu YAMADA

IPC: G03B21/14 ,  G03B21/28 ,  G02B13/18 ,  G02B13/16 ,  G02B17/08

CPC classification number: G03B21/147 ,  G02B13/16 ,  G02B13/18 ,  G02B17/08 ,  G02B17/0852 ,  G03B21/28

Abstract: A projection optical system of the present disclosure projects onto a projection surface (screen) an image ray bundle formed on an image display element, and includes a transmissive optical system that is positioned on a side of an emission surface of the image display element and has 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 an aperture stop, at least one positive lens disposed closer to the image display element than the aperture stop is, a first positive meniscus-shaped lens, a negative lens, and a second positive meniscus-shaped lens with the first and second positive lenses and the negative lens being closer to the projection surface than the aperture stop is. The first and second positive lenses are disposed with the negative lens being disposed therebetween so that their respective concave surfaces face each other. During focusing, a spacing between the first positive lens and the negative lens and a spacing between the second positive lens and the negative lens remain unchanged.

公开(公告)号：US20150338622A1

公开(公告)日：2015-11-26

申请号：US14818156

申请日：2015-08-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi KUZUHARA ,  Tsuneo UCHIDA

IPC: G02B15/20 ,  G02B27/64 ,  G02B13/00 ,  G02B7/14 ,  H04N5/232 ,  H04N5/225 ,  G02B15/16 ,  G02B7/10

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）。