Image tube with conditioned input screen

Details Image tube with conditioned input screen Image tube with conditioned input screen

1977-04-04

1979-04-03

Segal, Robert

Electric lamp and discharge devices

With magnetic device

Field transverse to discharge

313 94, 316 24, H01J 6124, H01J 6128, H01J 3902

Patent

active

041479505

ABSTRACT:
An image intensifier tube comprising a sealed envelope having therein means for controllably liberating oxygen within the envelope, and an input screen including an oxygen conditioned layer of fluorescent material and an overlying layer of photoemissive material which may be oxidized to improve the photon-to-electron conversion efficiency of the input screen.
A method of improving the conversion efficiency of an image intensifier tube input screen including the steps of exposing a layer of fluorescent material to oxygen prior to the deposition of an overlying layer of photoemissive material, and subsequently exposing the layer of photoemissive material to oxygen, if desired, after the tube envelope has been sealed.

REFERENCES:
patent: RE28751 (1976-03-01), Ball
patent: 2045637 (1936-06-01), De Boer et al.
patent: 2107352 (1938-02-01), Teves et al.
patent: 2217205 (1940-10-01), Prescott
patent: 2325110 (1943-07-01), Colborne
patent: 2391280 (1945-12-01), Teal

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