公开(公告)号：US20160252712A1

公开(公告)日：2016-09-01

申请号：US15150245

申请日：2016-05-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TSUNEO UCHIDA ,  MASAFUMI SUEYOSHI ,  YOSHIO MATSUMURA

IPC: G02B15/20 ,  H04N5/225 ,  G02B13/00 ,  G02B27/64 ,  G03B17/14

CPC classification number: G02B15/20 ,  G02B13/009 ,  G02B15/173 ,  G02B27/646 ,  G03B17/14 ,  H04N5/2254

Abstract: Provided is a zoom lens system including, from an object side to an image side: a first lens group having positive power; a second lens group having negative power; and a subsequent lens group including at least three lens groups, wherein the subsequent lens group includes two or more positive lens groups, the first lens group includes two or less lens elements, the second lens group includes four or more lens elements, the first lens group, the second lens group and a most image side lens group which disposed closest to the image side move with respect to an image plane in zooming from a wide angle end to a telephoto end, and a lens group disposed between the third lens group and an image plane is moved along an optical axis as a focusing lens group in focusing from an infinity in-focus condition to a close-object in-focus condition.

Abstract translation: 提供一种变焦透镜系统，包括从物体侧到像侧：具有正光焦度的第一透镜组; 具有负功率的第二透镜组; 以及包括至少三个透镜组的后续透镜组，其中所述后续透镜组包括两个或更多个正透镜组，所述第一透镜组包括两个或更少透镜元件，所述第二透镜组包括四个或更多个透镜元件，所述第一透镜 组，第二透镜组和最靠近图像侧的最大像侧透镜组相对于从广角端到望远端的变焦相对于像面移动，以及透镜组，设置在第三透镜组和 作为聚焦透镜组的光轴沿着光轴移动，从无限远对焦状态向近像对焦状态聚焦。

公开(公告)号：US20200150516A1

公开(公告)日：2020-05-14

申请号：US16742939

申请日：2020-01-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TSUNEO UCHIDA ,  KATSU YAMADA

IPC: G03B21/14 ,  G03B21/28

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.

公开(公告)号：US20200019051A1

公开(公告)日：2020-01-16

申请号：US16577887

申请日：2019-09-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TSUNEO UCHIDA ,  KATSU YAMADA

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

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 of the reference rays enters the first reflecting surface is larger than local power of the second reflecting surface at a position where the principal ray of the reference rays enters the second reflecting surface.