Projecting screen for optical purposes

Details Projecting screen for optical purposes Projecting screen for optical purposes

1981-10-08

1983-08-30

Wintercorn, Richard A.

350120, G03B 2160

Patent

active

044013680

ABSTRACT:
A projecting screen for optical purposes which meets the stringent requirements for the reproduction of macroscopic as well as microscopic images in transmission operation. The object comprises providing a projection screen comprising several scattering media movable in relation to each other, by which projected images may be reproduced free of grain- and flickering- or scintillation effects, under simultaneous improvement of the resolution and the transmission qualities. The substance of the invention comprises a projecting screen in which two solid inorganic or organic media are movably assembled in relation to each other, of which one or both may be light-scattering because of surface roughness on one side, and a liquid flowing between these two means which may or may not have a scattering effect. This invention is of multiple use in the construction of scientific instruments.

REFERENCES:
patent: 3655262 (1972-04-01), DePalma
patent: 3705757 (1972-12-01), Huber
patent: 3712707 (1973-01-01), Henkes, Jr.
patent: 3751135 (1973-08-01), Clausen et al.
patent: 4140369 (1979-02-01), Howland
patent: 4165153 (1979-08-01), Land
patent: 4184762 (1980-01-01), Guzman

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