公开(公告)号：US20180332257A1

公开(公告)日：2018-11-15

申请号：US16044982

申请日：2018-07-25

Applicant: NITTOH INC.

Inventor： Takahiko MATSUO

IPC: H04N9/31 ,  G02B17/08 ,  G03B21/14 ,  G02B15/20 ,  G03B21/00 ,  G02B13/16 ,  G03B21/28

CPC classification number: H04N9/315 ,  G02B13/16 ,  G02B15/20 ,  G02B17/08 ,  G02B17/0852 ,  G03B21/00 ,  G03B21/14 ,  G03B21/147 ,  G03B21/28 ,  H04N9/3141

Abstract: A projection optical system (10) projects from a first image plane (5) on a reducing side to a second image plane (6) on an enlargement side. The projection optical system (10) includes a first optical system (11) that includes a plurality of lenses and forms a first intermediate image (51) formed inside the first optical system (11) by light incident from the reducing side into a second intermediate image (52) on the enlargement side of the first optical system (11); a second optical system (12) that includes a first reflective surface (M1) with positive refractive power which is positioned further to the enlargement side than the second intermediate image (52); and a glass block (30) that is disposed between the first optical system (11) and the first reflective surface (M1), the glass block (30) passing light rays from the first optical system (11) to the second intermediate image (52).

公开(公告)号：US10063819B2

公开(公告)日：2018-08-28

申请号：US15522120

申请日：2015-10-30

Applicant: NITTOH INC.

Inventor： Takahiko Matsuo

IPC: H04N9/31 ,  G03B21/28 ,  G02B15/20 ,  G03B21/14 ,  G02B13/16

CPC classification number: H04N9/315 ,  G02B13/16 ,  G02B15/20 ,  G02B17/08 ,  G02B17/0852 ,  G03B21/00 ,  G03B21/14 ,  G03B21/147 ,  G03B21/28 ,  H04N9/3141

Abstract: A projection optical system (10) projects from a first image plane (5) on a reducing side to a second image plane (6) on an enlargement side. The projection optical system (10) includes a first optical system (11) that includes a plurality of lenses and forms a first intermediate image (51) formed inside the first optical system (11) by light incident from the reducing side into a second intermediate image (52) on the enlargement side of the first optical system (11); a second optical system (12) that includes a first reflective surface (M1) with positive refractive power which is positioned further to the enlargement side than the second intermediate image (52); and a glass block (30) that is disposed between the first optical system (11) and the first reflective surface (M1), the glass block (30) passing light rays from the first optical system (11) to the second intermediate image (52).

公开(公告)号：US20180106989A1

公开(公告)日：2018-04-19

申请号：US15728631

申请日：2017-10-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Michio KONO ,  Kiyoshi FUKAMI ,  Ryosuke FUKUOKA

IPC: G02B17/08 ,  G03F7/20

CPC classification number: G02B17/084 ,  G02B17/0852 ,  G03F7/70225 ,  G03F7/70316

Abstract: The present invention provides a projection optical system including a first concave reflecting surface, a first convex reflecting surface, a second concave reflecting surface, and a third concave reflecting surface, wherein the first concave reflecting surface, the first convex reflecting surface, the second concave reflecting surface, and the third concave reflecting surface are arranged such that light from an object plane forms an image on an image plane by being reflected by the first concave reflecting surface, the first convex reflecting surface, the second concave reflecting surface, the first convex reflecting surface, and the third concave reflecting surface in an order named.

公开(公告)号：US20180088327A1

公开(公告)日：2018-03-29

申请号：US15830195

申请日：2017-12-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SATOSHI KUZUHARA ,  MASAFUMI SUEYOSHI ,  HIROAKI OKAYAMA ,  KATSUHIKO HAYASHI

IPC: G02B27/01 ,  B60K35/00 ,  H04N9/31

CPC classification number: G02B27/0101 ,  B60K35/00 ,  B60K2370/334 ,  B60R11/02 ,  G02B17/08 ,  G02B17/0852 ,  G02B27/01 ,  G02B2027/014 ,  G02B2027/0145 ,  G02B2027/0154 ,  G02B2027/0185 ,  H04N9/3135

Abstract: Head-up display projects an image on transparent windshield to cause an observer to visually recognize a virtual image. Head-up display includes screen, optical system displays the image. Optical system projects the image displayed by screen on windshield. Driving unit moves screen. Optical system forms an intermediate image between optical systems, the intermediate image being larger than the image of screen.

公开(公告)号：US09927684B2

公开(公告)日：2018-03-27

申请号：US15464585

申请日：2017-03-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tsuneo Uchida ,  Katsu Yamada

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

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.

公开(公告)号：US20170332057A1

公开(公告)日：2017-11-16

申请号：US15522120

申请日：2015-10-30

Applicant: NITTOH INC.

Inventor： Takahiko MATSUO

IPC: H04N9/31 ,  G03B21/14 ,  G02B13/16 ,  G02B15/20 ,  G03B21/28

CPC classification number: H04N9/315 ,  G02B13/16 ,  G02B15/20 ,  G02B17/08 ,  G02B17/0852 ,  G03B21/00 ,  G03B21/14 ,  G03B21/147 ,  G03B21/28 ,  H04N9/3141

Abstract: A projection optical system (10) projects from a first image plane (5) on a reducing side to a second image plane (6) on an enlargement side. The projection optical system (10) includes a first optical system (11) that includes a plurality of lenses and forms a first intermediate image (51) formed inside the first optical system (11) by light incident from the reducing side into a second intermediate image (52) on the enlargement side of the first optical system (11); a second optical system (12) that includes a first reflective surface (M1) with positive refractive power which is positioned further to the enlargement side than the second intermediate image (52); and a glass block (30) that is disposed between the first optical system (11) and the first reflective surface (M1), the glass block (30) passing light rays from the first optical system (11) to the second intermediate image (52).

公开(公告)号：US09810976B2

公开(公告)日：2017-11-07

申请号：US15189564

申请日：2016-06-22

Applicant: SEIKO EPSON CORPORATION

Inventor： Nobutaka Minefuji

IPC: G02B3/00 ,  G02B9/00 ,  G02B17/00 ,  G03B21/14 ,  G02B27/00 ,  G03B21/28 ,  G02B15/16 ,  G02B15/20 ,  G02B7/04 ,  G03B21/00 ,  H04N9/31 ,  G02B3/02 ,  G02B13/00 ,  G02B17/08 ,  G02B13/16 ,  G02B15/14 ,  G02B13/22 ,  G03B5/00 ,  G02B5/00 ,  G02B13/18 ,  G03B17/54

CPC classification number: G03B21/147 ,  G02B3/02 ,  G02B5/005 ,  G02B7/04 ,  G02B13/0045 ,  G02B13/0065 ,  G02B13/009 ,  G02B13/16 ,  G02B13/18 ,  G02B13/22 ,  G02B15/14 ,  G02B15/161 ,  G02B15/20 ,  G02B17/08 ,  G02B17/0816 ,  G02B17/0852 ,  G02B17/0896 ,  G02B27/0025 ,  G03B5/00 ,  G03B17/54 ,  G03B21/006 ,  G03B21/28 ,  H04N9/315

Abstract: The 1-2nd lens group is divided into three lens groups which move when focusing is performed during the magnification change. Even in a case in which the second optical group is formed of one mirror, it is possible for a primary image to contain appropriate aberration and to hereby reduce aberration of an image which is finally projected onto a screen through the second optical group.

公开(公告)号：US09784956B2

公开(公告)日：2017-10-10

申请号：US14657768

申请日：2015-03-13

Applicant: Ya-Ling Hsu ,  Li-Chiu Tsai ,  Chi-Chang Tien ,  Yi-Hsueh Chen

Inventor： Ya-Ling Hsu ,  Li-Chiu Tsai ,  Chi-Chang Tien ,  Yi-Hsueh Chen

IPC: G02B17/08 ,  G02B9/64 ,  G02B13/16 ,  G02B13/06 ,  G02B13/18

CPC classification number: G02B17/0852 ,  G02B9/64 ,  G02B13/06 ,  G02B13/18

Abstract: A wide-angle projection system includes a refraction unit and a reflection unit. The refraction unit includes a first lens group of positive refractive power and a second lens group of negative refractive power. The second lens group is disposed between the first lens group and the reflection unit and the condition: 0.9

公开(公告)号：US20170059971A1

公开(公告)日：2017-03-02

申请号：US15230816

申请日：2016-08-08

Applicant: Yohei Takano ,  Hibiki Tatsuno ,  Yasuyuki Shibayama

Inventor： Yohei Takano ,  Hibiki Tatsuno ,  Yasuyuki Shibayama

IPC: G03B21/14 ,  G02B15/20 ,  G03B21/28 ,  G02B13/16

CPC classification number: G02B15/20 ,  G02B7/021 ,  G02B13/16 ,  G02B17/00 ,  G02B17/08 ,  G02B17/0852 ,  G02B17/0896 ,  G03B21/142 ,  G03B21/28

Abstract: An optical system includes a reflective optical system on a magnification side along an optical path of the projection optical system and a refractive optical system on a reduction side along the optical path. The reflective optical system includes one reflective optical element having a power. The refractive optical system includes a front group on the magnification side and a rear group on the reduction side. The front group having, in order from the magnification side toward the reduction side, a first lens group with a positive or negative refractive power, a second lens group, and a third lens group with a positive refractive power. The rear group has a positive refractive power. The first lens group moves to the magnification side, and the second lens group and the third lens group move to the reduction side in a change in focus from a long distance to a short distance.

Abstract translation: 光学系统包括沿着投影光学系统的光路的放大侧的反射光学系统和沿着光路的还原侧的折射光学系统。 反射光学系统包括具有功率的一个反射光学元件。 折射光学系统包括放大倍率侧的前组和还原侧的后组。 前组具有从放大侧朝向还原侧的顺序具有正屈光力或负折射光焦度的第一透镜组，第二透镜组和具有正屈光力的第三透镜组。 后组具有正屈光力。 第一透镜组移动到放大倍率侧，第二透镜组和第三透镜组从长距离到短距离移动到焦距变化的缩小侧。

公开(公告)号：US09581795B2

公开(公告)日：2017-02-28

申请号：US14786944

申请日：2013-04-24

Applicant: Hitachi Maxell, Ltd.

Inventor： Masahiko Yatsu

IPC: G03B21/28 ,  G02B17/08 ,  G02B13/04 ,  G02B13/00 ,  G03B9/64 ,  G03B21/14 ,  G02B13/16 ,  G02B13/18 ,  H04N9/31

CPC classification number: G02B17/0852 ,  G02B13/0045 ,  G02B13/006 ,  G02B13/0065 ,  G02B13/04 ,  G02B13/16 ,  G02B13/18 ,  G03B9/64 ,  G03B21/142 ,  H04N9/317 ,  H04N9/3173

Abstract: Provided is a projection-type video display device implementing further reduction of a projection distance and further miniaturization of a projection optical system. The projection-type video display device includes a lens group which includes a plurality of lenses, a free-form-surface lens, and a free-form-surface mirror which projects light from the free-form-surface lens on a screen, wherein the lens group includes a third lens which has a bi-convex shape, a fourth lens which has a bi-concave shape, a fifth lens which has a bi-convex shape, the third to fifth lenses constitute a triplet lens, and wherein the free-form-surface lens has a meniscus lens shape of which a convex surface is oriented toward the magnification side.

Abstract translation: 提供了投影型视频显示装置，其进一步减小投影距离并进一步小型化投影光学系统。 投影型视频显示装置包括：透镜组，其包括多个透镜;自由曲面透镜;和自由曲面反射镜，其将来自自由曲面透镜的光投射到屏幕上，其中 透镜组包括具有双凸形状的第三透镜，具有双凹形状的第四透镜，具有双凸形状的第五透镜，第三至第五透镜构成三重透镜，并且其中， 自由曲面透镜具有凸面朝向放大侧的弯月形透镜形状。