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1. WO2000042469 - FRESNEL LENS FOR PROJECTION SCREENS

Publication Number WO/2000/042469
Publication Date 20.07.2000
International Application No. PCT/US1999/010138
International Filing Date 07.05.1999
Chapter 2 Demand Filed 23.11.1999
IPC
G03B 21/62 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
54Accessories
56Projection screens
60characterised by the nature of the surface
62Translucent screens
CPC
G03B 21/625
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
54Accessories
56Projection screens
60characterised by the nature of the surface
62Translucent screens
625Lenticular translucent screens
Applicants
  • 3M INNOVATIVE PROPERTIES COMPANY [US/US]; 3M Center P.O. Box 33427 Saint Paul, MN 55133-3427, US
Inventors
  • HENNEN, Daniel, W.; US
  • MOSHREFZADEH, Robert, S.; US
  • NELSON, John, C.; US
  • TAPIO, Scott, M.; US
  • THOMAS, Patrick, A.; US
Agents
  • MILLER, William, D. ; 3M Innovative Properties Company Office of Intellectual Property Counsel P.O. Box 33427 Saint Paul, MN 55133-3427, US
Priority Data
09/229,19813.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FRESNEL LENS FOR PROJECTION SCREENS
(FR) LENTILLE FRESNEL POUR ECRANS DE PROJECTION
Abstract
(EN)
The present invention is a screen, such as is used in back-lit projection screens, having a Fresnel lens laminated to another layer for support. The screen includes a Fresnel lens having an output surface, and a dispersing screen supportingly attached on a first side to the output surface of the Fresnel lens.
(FR)
L'invention concerne un écran, tel que ceux utilisés dans les écrans à rétroéclairage, présentant une lentille Fresnel collée à une autre couche de support. L'écran comprend une lentille Fresnel ayant une surface de sortie et un écran divergent fixé par le premier côté sur la surface de sortie de la lentille Fresnel.
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