Proximity X-ray image intensifier tube

Details Proximity X-ray image intensifier tube Proximity X-ray image intensifier tube

1991-02-05

1992-08-11

Fields, Carolyn E.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

378 99, H04N 532

Patent

active

051381478

ABSTRACT:
An X-ray image intensifier tube includes an entrance screen with a photocathode and, opposite thereto and at a slight distance therefrom, is a detection screen for detecting entrance image signals intensified by the proximity tube. The detection screen comprises a phosphor layer and an integrated matrix of detection elements within the tube envelope. The detection screen can be read in a location-sensitive manner and produces signals which can be directly electrically processed. The detection screen may be provided with a metal layer enabling brightness control and be mounted completely or partly outside the tube. The tube is assembled using low-temperature thermocompression seals wherever desired. The latter is applicable to the tube seal, so that the risk of deactivation of the photocathode is avoided.

REFERENCES:
patent: 3699375 (1972-10-01), Weibel
patent: 3825763 (1974-07-01), Ligtenberg et al.
patent: 4300046 (1981-10-01), Wang
patent: 4365269 (1982-12-01), Haendle
patent: 4447721 (1984-05-01), Wang
patent: 4471378 (1984-09-01), Ng
patent: 4599740 (1986-07-01), Cable
patent: 4842894 (1989-06-01), Ligtenberg et al.
patent: 4855587 (1989-08-01), Creusen et al.

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