Shadow mask color picture tube having a mosaic color screen with

Details Shadow mask color picture tube having a mosaic color screen with Shadow mask color picture tube having a mosaic color screen with

1976-11-11

1978-07-04

Gonzales, John

G03B 4100

Patent

active

040991873

ABSTRACT:
A variable density optical filter and method of making the filter are disclosed. The filter may be one of three filters used to expose a photosensitive coating in forming a color picture tube screen. The density of the filter varies in accordance with measured clipping and leaving tolerance of a completed tube formed without use of the filter.

REFERENCES:
patent: 3592112 (1971-07-01), Frey
patent: 3667355 (1972-06-01), Ng et al.
patent: 3685994 (1972-08-01), Frey

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