X-ray imaging tube having a light-absorbing property

Details X-ray imaging tube having a light-absorbing property X-ray imaging tube having a light-absorbing property

1992-05-22

1994-08-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

2504861, 313527, H01J 162

Patent

active

053389263

ABSTRACT:
An X-ray imaging tube has an input phosphor screen including a substrate, a discontinuous phosphor layer formed on the substrate, and a continuous phosphor layer formed on the discontinuous phosphor layer. The discontinuous phosphor layer consists of a large number of columnar crystals separated from each other and containing a substance for absorbing light emitted from a phosphor upon incidence of an X-ray. Light-absorbing layers containing a compound of the substance and having a concentration of the element higher on outer surfaces thereof than that in interiors thereof are formed on adjacent side surfaces of the columnar crystals such that the light-absorbing layers are not present at an interface between the discontinuous phosphor layer and the continuous phosphor layer. The gap between the adjacent side surfaces of the columnar crystals is 0.1 .mu.m or more.

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Database WPI, Weel 7635, Derwent Publications Ltd., London, GB; AN 76-65736 and JP-A-51 080690.
Yacaman et al, "Growth of Mn203 Thin Films by Impurity Diffusion From Volume to Surface in Impure NaCl Crystals", Journal of Crystal Growth, vol. 7, 1970, pp. 259-261.

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