Projection screen and process for production thereof

Details Projection screen and process for production thereof Projection screen and process for production thereof

1974-10-07

1976-06-22

Wintercorn, Richard A.

350129, G03B 2156, G03B 2160

Patent

active

039648222

ABSTRACT:
A projection screen includes a substrate having a metallic aluminum surface and a transparent film overlay. The metallic aluminum surface is provided with a pattern of directional irregularities and a pattern of craters. The projection screen is produced by subjecting an aluminum surface to a mechanical surface treatment to form a dense pattern of fine irregularities, etching the treated surface to form a crater pattern thereon and coating the resulting surface with a protective transparent film.

REFERENCES:
patent: 3507548 (1970-04-01), Hoffmann et al.
patent: 3573074 (1971-03-01), Duke et al.
patent: 3653740 (1972-04-01), Ogura et al.
patent: 3811750 (1974-05-01), Coulthard
patent: 3844644 (1974-10-01), Martinez
patent: 3851950 (1974-12-01), Andres et al.

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