Front projection screen made from a transparent material

Details Front projection screen made from a transparent material Front projection screen made from a transparent material

1974-12-19

1976-02-17

Hix, L. T.

350129, G03B 2160

Patent

active

039388760

ABSTRACT:
A front projection screen is disclosed which is made from a transparent material. Prism-like elements are formed on the backside thereof so that light incident upon the screen from a preferred direction will be totally reflected by the screen while light incident upon the screen from other directions will pass therethrough. Sides of the prism-like elements are curved for dispersion in the horizontal plane while the front surface of the projection screen has segments of cylindrical columns formed thereon perpendicular to the prism-like elements to provide an angular spread in the vertical plane. The thickness of the screen is between 30 percent and 70 percent of the focal length of the cylindrical columns to allow the screen to be tilted in the vertical plane.

REFERENCES:
patent: 2351034 (1944-06-01), Gabor
patent: 2991693 (1961-07-01), MacNeille
patent: 3782805 (1974-01-01), Brown

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