Method of forming radiographic images

Details Method of forming radiographic images Method of forming radiographic images

1977-11-10

1979-08-07

Church, Craig E.

Radiant energy

Source with charged plate-type detector

250315A, G03G 1300

Patent

active

041638980

ABSTRACT:
A method of forming a radiographic image uses the phenomenon that some substances emit exoelectrons when exposed to heating or to irradiation of light after first being irradiated by X-rays. First, X-rays are irradiated through a subject to an exoelectron emitting member consisting of a conductive base plate and a layer of exoelectron emitting substance superposed thereon. Subsequently, the surface of the exoelectron emitting member is coated with a charge injection liquid and a nonconductive sheet is placed in intimate contact with the charge injection liquid. The insulating sheet is coated with a conductive liquid, and a conductive electrode is superposed thereon. The laminate is then exposed to heating or to irradiation of light while applying a voltage between the conductive base plate and the conductive electrode. If light irradiation is used, it is directed onto the conductive electrode which must be transparent. In either case, an electrostatic latent image is formed on the insulating sheet.

REFERENCES:
patent: 3978335 (1976-08-01), Gibbons

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