Directional filter for a display screen, the method for manufact

Details Directional filter for a display screen, the method for manufact Directional filter for a display screen, the method for manufact

1980-07-18

1982-08-03

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Imaged product

Structurally defined

430 23, 430 28, 430 29, 430 27, 430 25, 430321, 430324, 430950, 350311, 350276SL, G03C 500, G02B 2700, G02B 520

Patent

active

043428215

ABSTRACT:
For improving the contrast of information displayed on the screen, there is placed in front of this latter a filter comprising a matrix of channels pierced in a photosensitive glass plate. The pierced plate is covered over the whole of its surface with a blackened deposit so as to reduce to the maximum its coefficient of reflection. Thus filters can be formed readily on request, according to the direction of observation in particular, with a good coefficient of transmission and improved contrast.

REFERENCES:
patent: 3020433 (1962-02-01), Day
patent: 3295968 (1967-01-01), Hamilton
patent: 3378636 (1968-04-01), Hamilton
patent: 3447984 (1969-06-01), Castrucci et al.
patent: 3458370 (1969-07-01), Cone
patent: 3582189 (1971-06-01), Moritz et al.
patent: 3760215 (1973-09-01), Sach
patent: 3907403 (1975-09-01), Maeda

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