Direct view, panel type x-ray image intensifier tube

Details Direct view, panel type x-ray image intensifier tube Direct view, panel type x-ray image intensifier tube

H - Electricity

05

G

358/11

H05G 1/00 (2006.01) H01J 31/48 (2006.01) H01J 31/50 (2006.01)

Patent

CA 1116316

ABSTRACT A panel shaped, proximity type, x-ray image intensifier tube for medical x-ray fluoroscopy use having all linear components and yet a high brightness gain, in excess of 4,000 cd-sec/m2-R, the tube being comprises of a rugged metallic tube envelope, an inwardly concave metallic input window, a directly viewable full size output display screen, and a scintillator-photocathode screen having a thickness of at least 200 microns for a high x-ray photon utilization ability as well as x-ray stopping power, the scintillator-photocathode screen being suspended on insulators within the envelope and in between the input window and the output screen. The scintillator-photocathode screen is spaced from the output screen by at least 8mm to allow the application of a high negative potential at the scintillator-photocathode screen with respect to the output screen for high gain with low field emission, since all of the remaining components within the tube envelope are at neutral potential with respect to the output display screen.

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