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1. WO2020137884 - PROJECTION OPTICAL SYSTEM AND PROJECTOR

Publication Number WO/2020/137884
Publication Date 02.07.2020
International Application No. PCT/JP2019/050095
International Filing Date 20.12.2019
IPC
G02B 17/08 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
17Systems with reflecting surfaces, with or without refracting elements
08Catadioptric systems
G02B 13/16 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
16for use in conjunction with image converters or intensifiers
G02B 13/18 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
18with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
G02B 15/167 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15Optical objectives with means for varying the magnification
14by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
16with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
163having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
167having an additional fixed front lens or group of lenses
G03B 21/14 2006.01
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
14Details
CPC
G02B 13/16
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
16for use in conjunction with image converters or intensifiers ; , or for use with projectors, e.g. objectives for projection TV
G02B 13/18
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
18with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
G02B 15/167
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15Optical objectives with means for varying the magnification
14by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
16with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
163having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
167having an additional fixed front lens or group of lenses
G02B 17/08
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
17Systems with reflecting surfaces, with or without refracting elements
08Catadioptric systems
G03B 21/14
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
14Details
Applicants
  • 株式会社nittoh NITTOH INC. [JP]/[JP]
Inventors
  • 伊藤 了史 ITO, Satoshi
Agents
  • 今井 彰 IMAI, Akira
Priority Data
2018-24508127.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) PROJECTION OPTICAL SYSTEM AND PROJECTOR
(FR) SYSTÈME OPTIQUE DE PROJECTION ET PROJECTEUR
(JA) 投射光学系およびプロジェクタ
Abstract
(EN)
Provided is a projection optical system (10) that projects a first image (IM0) on a reduction side (2) toward an enlargement side (3), the projection optical system including: a first optical system (11) including a plurality of lenses; and a second optical system (12) including a first reflective face (13) located on the enlargement side and having a positive refractive power. The first optical system renders a first intermediate image (IM1), formed inside the first optical system by light incident from the reduction side, into a second intermediate image (IM2) on the enlargement side with respect to the first optical system. The first optical system includes: a first refractive optical system (15) including a first optical axis (21), which is shifted in a first direction (31) relative to center light (20) of the first image; and a second refractive optical system (16) including a second optical axis (22), which is shifted in the first direction relative to the first optical axis (21).
(FR)
L'invention concerne un système optique de projection (10) qui projette une première image (IM0) sur un côté de réduction (2) vers un côté d'agrandissement (3), le système optique de projection comprenant un premier système optique (11) qui comporte une pluralité de lentilles; et un second système optique (12) comprenant une première face réfléchissante (13) située sur le côté d'agrandissement et ayant une réfringence positive. Le premier système optique convertit une première image intermédiaire (IM1), formée à l'intérieur du premier système optique par une lumière incidente provenant du côté de réduction, en une seconde image intermédiaire (IM2) sur le côté d'agrandissement par rapport au premier système optique. Le premier système optique comprend un premier système optique de réfraction (15) comprenant un premier axe optique (21) décalé dans une première direction (31) par rapport à la lumière centrale (20) de la première image; et un second système optique de réfraction (16) comprenant un second axe optique (22) décalé dans la première direction par rapport au premier axe optique (21).
(JA)
縮小側(2)の第1の画像(IM0)を拡大側(3)へ投射する投射光学系であって、複数のレンズを含む第1の光学系(11)と、拡大側に位置する正の屈折力の第1の反射面(13)を含む第2の光学系(12)とを有する投射光学系(10)を提供する。第1の光学系は、縮小側から入射した光により第1の光学系の内部に結像される第1の中間像(IM1)を当該第1の光学系よりも拡大側に第2の中間像(IM2)として結像する。第1の光学系は、第1の画像の中心光(20)に対し、第1の方向(31)にシフトした第1の光軸(21)を含む第1の屈折光学系(15)と、第1の光軸(21)に対し、第1の方向にシフトした第2の光軸(22)を含む第2の屈折光学系(16)とを含む。
Also published as
JP2020563203
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