Title:
TRANSMISSION TYPE PROJECTING SCREEN
Document Type and Number:
Japanese Patent JPS56140335
Kind Code:
A
Abstract:
PURPOSE: To obtain reproduced images of good quality on the transmission type projection screen constituted of a Fresnel lens sheet and a renticular lens sheet by roughening the back surface of the Fresnel lens surface of said screen.
CONSTITUTION: The pitch stripes of the Fresnel lenses on a Fresnel lens sheet 4 of which the back surfaces 7 of Fresnel lenses are roughened are blurred by the roughened surface 7 and the generation of moire fringes owing to the mutual effect of the renticular lenses on a renticular lens sheet 3 is suppressed by using the screen combining said Fresnel lens sheet 4 and the renticular lens sheet 3.
Inventors:
YAMAMOTO YOSHIHARU
FUNAKOSHI YASUTOMO
NAGAOKA YOSHITOMI
NAKAJIMA YASUO
FUNAKOSHI YASUTOMO
NAGAOKA YOSHITOMI
NAKAJIMA YASUO
Application Number:
JP4488680A
Publication Date:
November 02, 1981
Filing Date:
April 04, 1980
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
B82Y10/00; G03B21/62; (IPC1-7): G03B21/62
Domestic Patent References:
| JPS499128U | 1974-01-25 | |||
| JP36020417A |