Output luminescent screen for an x-ray image intensifier having

Details Output luminescent screen for an x-ray image intensifier having Output luminescent screen for an x-ray image intensifier having

1991-02-19

1992-06-30

Fields, Carolyn E.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2504831, 250213VT, H01J 163

Patent

active

051265737

ABSTRACT:
An output luminescent screen for an x-ray image intensifier has a carrier on which a phosphor, embedded in a bonding agent, is applied. The phosphor is a terbium-activated gadolinium oxysulfide (Gd.sub.2 O.sub.2 S:Tb)luminophore. The average grain size of the phosphor is between 1.7 .mu.m and 2 .mu.m, with no more than 15%, preferably 10%, of the grains of the phosphor being larger than 3.5 .mu.m, and 85% through 95%, preferably 90%, of the phosphor grains being larger than 1.1 .mu.m. Zinc cadmium sulfide in a proportion up to 80% may be aded to the phosphor.

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patent: 3974389 (1976-08-01), Ferri et al.
patent: 4054798 (1977-10-01), Watanabe et al.
patent: 4507560 (1985-03-01), Mathers et al.
patent: 4914303 (1990-04-01), Kneupfer

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