Image tube with conditioned input screen

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

H - Electricity

01

J

313/73

H01J 43/00 (2006.01) H01J 1/54 (2006.01) H01J 9/12 (2006.01) H01J 29/38 (2006.01) H01J 31/50 (2006.01)

Patent

CA 1093626

Abstract of the Disclosure An image intensifier tube comprising an envelope having sealed therein an externally controllable oxygen liberating source, and an input screen including an oxygen conditioned layer of fluorescent material and an overlying layer of photo- emissive 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.

298976

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