Radiographic imaging screen

Details Radiographic imaging screen Radiographic imaging screen

1989-12-01

1991-06-18

Hannaher, Constantine

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

G21K 400

Patent

active

050251635

ABSTRACT:
An improved radiographic imaging screen is disclosed in which microscopic high-Z metal particles are coated with or dispersed in luminescent material and formed as a layer on a substrate. The complete surrounding of each particle with the luminescent material assures that secondary electrons emitted from the particles from absorption of incident radiation photons will encounter the luminescent material regardless of the direction of emission of the electrons.

REFERENCES:
patent: 3872309 (1975-03-01), De Belder et al.
patent: 4256965 (1981-03-01), Lucian
patent: 4795910 (1989-01-01), Henderson et al.
A. M. Glass, P. F. Liao, J. G. Bergman, and D. H. Olson, "Interaction of Metal Particles with Adsorbed Dye Molecules: Absorption and Luminescence", Optics Letters, vol. 5, No. 9, (Sep. 1980), pp. 368-370.

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