Color stripe filter with two protective layers

Details Color stripe filter with two protective layers Color stripe filter with two protective layers

1975-03-19

1976-10-12

Stern, Ronald J.

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313388, 350166, 350317, 427167, H01J 2945, G02B 528

Patent

active

039860698

ABSTRACT:
A spatial filter covered with first protective layers and a second protective layer, wherein the second protective layer is mounted on the first protective layers so as to fill up recesses appearing in the surface of said first protective layers which are evaporated on filter stripes deposited on the surface of a substrate and on those parts of the surface of said substrate on which filter stripes are not formed and, when the spatial filter is placed in an image pickup tube, the second protective layer having a smooth flawless surface enables the image pickup tube to produce a good output image for a long period.

REFERENCES:
patent: 2813989 (1957-11-01), Weimer
patent: 3912962 (1975-11-01), Nobutoki
patent: 3928160 (1975-12-01), Nobutoki

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