Oxygenated photosensitive screen

Details Oxygenated photosensitive screen Oxygenated photosensitive screen

1980-08-18

1983-08-02

Smith, Alfred E.

Electric lamp and discharge devices

Photosensitive

Having phosphor screen

H01J 4000

Patent

active

043968538

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: 3147226 (1964-09-01), Jonck
patent: 3617743 (1971-11-01), Rabatin et al.
patent: 3855035 (1974-12-01), Bates et al.
patent: 4069355 (1978-01-01), Lubowski et al.
patent: 4147950 (1979-04-01), Caraher et al.

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