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1. WO2000043841 - SYSTEM FOR GENERATING IMAGES USING SWITCHABLE HOLOGRAPHIC OPTICAL ELEMENTS

Publication Number WO/2000/043841
Publication Date 27.07.2000
International Application No. PCT/US2000/001177
International Filing Date 18.01.2000
Chapter 2 Demand Filed 07.06.2000
IPC
G03H 1/26 2006.01
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red, or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
26Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
CPC
G03H 1/26
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
26Processes or apparatus specially adapted to produce multiple ; sub-; holograms or to obtain images from them, e.g. multicolour technique
Applicants
  • DIGILENS INC. [US/US]; 306 Potrero Avenue Sunnyvale, CA 94086, US
Inventors
  • POPOVICH, Milan, M.; GB
Agents
  • KAPLAN, Cindy, S.; Ritter, Van Pelt & Yi LLP 4906 El Camino Real Suite 205 Los Altos, CA 94022, US
Priority Data
60/116,42119.01.1999US
60/119,42009.02.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYSTEM FOR GENERATING IMAGES USING SWITCHABLE HOLOGRAPHIC OPTICAL ELEMENTS
(FR) SYSTEME DE GENERATION D'IMAGES UTILISANT DES ELEMENTS OPTIQUES HOLOGRAPHIQUES COMMUTABLES
Abstract
(EN)
A system (10) for generating an image comprising an illumination system (14) having a light source (24) and a plurality of holographic devices (26, 28, 30) switchable between an active state wherein light from the light source is diffracted by the device and a passive state wherein the light is not diffracted by the device. A display device (12) is positioned for illumination by the illumination system and operable to project a display image. The system further includes an optical projection device (16) to receive the displayed image and form an intermediate image having a generally uniform illumination distribution on an optical diffuser (18). The diffuser is operable to project a resultant image with an emission angle larger than an emission angle of the display panel.
(FR)
L'invention concerne un système (10) permettant de générer une image comprenant un système d'éclairage (14) ayant une source de lumière (24) et une pluralité de dispositifs holographiques (26, 28, 30) pouvant passer entre un état actif lorsque la lumière provenant de la source de lumière est diffractée par le dispositif et un état passif lorsque la lumière n'est pas diffractée par le dispositif. Un afficheur (12) sert à éclairer grâce à son système d'éclairage et à projeter une image. Le système est aussi équipé d'un dispositif de projection optique (16) permettant de recevoir l'image affichée et de former une image intermédiaire dont la répartition de l'éclairage se fait de manière généralement uniforme sur un diffuseur optique (18). Le diffuseur sert à projeter l'image obtenue selon un angle d'émission supérieur à l'angle d'émission du panneau d'affichage.
Also published as
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