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1. WO2018155472 - ILLUMINATION DEVICE AND IMAGE READING DEVICE

Publication Number WO/2018/155472
Publication Date 30.08.2018
International Application No. PCT/JP2018/006129
International Filing Date 21.02.2018
IPC
H04N 1/04 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
04Scanning arrangements
G02B 6/00 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
G03B 27/54 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
27Photographic printing apparatus
32Projection printing apparatus, e.g. enlarger, copying camera
52Details
54Lamp housings; Illuminating means
H04N 1/028 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
024Details of scanning heads
028for picture-information pick-up
CPC
G02B 2006/0098
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0098for scanning
G02B 6/0078
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0075Arrangements of multiple light guides
0078Side-by-side arrangements, e.g. for large area displays
G03B 27/54
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
27Photographic printing apparatus
32Projection printing apparatus, e.g. enlarger, copying camera
52Details
54Lamp housings; Illuminating means
H04N 1/028
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
024Details of scanning heads ; ; Means for illuminating the original
028for picture information pick-up
H04N 1/04
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
04Scanning arrangements ; , i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
Applicants
  • 三菱電機株式会社 MITSUBISHI ELECTRIC CORPORATION [JP]/[JP]
Inventors
  • 松澤 卓 MATSUZAWA, Taku
  • 白木 徹 SHIRAKI, Toru
  • 國塩 英記 KUNISHIO, Hideki
  • 大濱 大輔 OHAMA, Daisuke
Agents
  • 村上 加奈子 MURAKAMI, Kanako
  • 松井 重明 MATSUI, Jumei
  • 倉谷 泰孝 KURATANI, Yasutaka
  • 伊達 研郎 DATE, Kenro
Priority Data
2017-03066522.02.2017JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) ILLUMINATION DEVICE AND IMAGE READING DEVICE
(FR) DISPOSITIF D'ÉCLAIRAGE ET DISPOSITIF DE LECTURE D'IMAGE
(JA) 照明装置及び画像読取装置
Abstract
(EN)
An illumination device provided with a light source (1) and a light guide body (2) with a bar-like shape extending in a longitudinal direction for guiding entry light to a body (M) to be illuminated. The light source (1) is disposed at an end in the longitudinal direction of the light guide body (2). The light guide body (2) is provided with: an entry surface (2d) which light emitted from the light source (1) enters and which is provided at the end in the longitudinal direction; a planar exit plane (2b) for allowing the light entering the light guide body (1) to exit toward the body (M) to be illuminated; a reflecting surface (2c) which has a paraboloidal shape and which reflects light from a focal point of the paraboloidal shape or light from a predetermined area passing the focal point toward the exit plane (2b); and a light scattering portion (2a) which includes a predetermined scattering area for scattering light entering from the entry surface (2d) and reflecting the light in the direction of the reflecting surface (2c). The light scattering portion (2a) is provided at the focal point (2f) of the paraboloidal shape, or in a position such that the light reflected by the scattering area of the light scattering portion passes the focal point (2f) of the paraboloidal shape.
(FR)
L'invention concerne un dispositif d'éclairage qui comprend une source de lumière (1) et un corps de guidage de lumière (2) présentant une forme de type barre s'étendant dans une direction longitudinale pour guider la lumière d'entrée vers un corps (M) à éclairer. La source de lumière (1) est disposée à une extrémité dans la direction longitudinale du corps de guidage de lumière (2). Le corps de guidage de lumière (2) est pourvu : d'une surface d'entrée (2d) dans laquelle entre la lumière émise par la source de lumière (1) et qui est disposée au niveau de l'extrémité dans la direction longitudinale ; d'un plan de sortie planaire (2b) pour permettre à la lumière entrant dans le corps de guidage de lumière (1) de sortir vers le corps (M) à éclairer ; d'une surface réfléchissante (2c) qui a une forme paraboloïdale et qui réfléchit la lumière à partir d'un point focal de la forme paraboloïdale ou de la lumière à partir d'une zone prédéterminée passant par le point focal vers le plan de sortie (2b) ; et d'une partie de diffusion de lumière (2a) qui comprend une zone de diffusion prédéterminée pour diffuser la lumière entrant à partir de la surface d'entrée (2d) et réfléchir la lumière dans la direction de la surface réfléchissante (2c). La partie de diffusion de lumière (2a) est disposée au niveau du point focal (2f) de la forme paraboloïdale, ou dans une position telle que la lumière réfléchie par la zone de diffusion de la partie de diffusion de lumière passe par le point focal (2f) de la forme paraboloïdale.
(JA)
光源(1)と、入射した光を被照明体(M)へ導く長手方向に延在する棒状の形状を有する導光体(2)と、を備え、光源(1)は、導光体(2)の長手方向の端部に配置され、導光体(2)は、光源(1)で発光した光が入射する長手方向の端部に設けられた入射面(2d)と、導光体(1)に入射した光を被照明体(M)へ出射する平面形状の出射面(2b)と、放物面形状であって、この放物面形状の焦点からの光またはこの焦点を通る決められた範囲からの光を出射面(2b)へ向けて反射する反射面(2c)と、入射面(2d)から入射した光を散乱させ反射面(2c)の方向へと反射する所定の散乱領域を有する光散乱部(2a)と、を備え、光散乱部(2a)は、放物面形状の焦点(2f)に設けられている、または、光散乱部の散乱領域で反射した光が放物面形状の焦点(2f)を通る位置に設けられている。
Also published as
DE112018000949
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