6 July 1979 Laser Readout Of Electrostatic Images
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Proceedings Volume 0173, Application of Optical Instrumentation in Medicine VII; (1979) https://doi.org/10.1117/12.957128
Event: Application of Optical Instrumentation in Medicine VII, 1979, Toronto, Canada
Abstract
An electrostatic radiographic receptor has been designed that allows the latent image resulting from an x-ray exposure to be reconstructed by means of a scanning laser beam. The receptor can be described as a duodielectric device making use of amorphous selenium as one of the dielectric components. The second dielectric component is a polyester sheet with a transparent gold coating on one side. Charges may be trapped at the surface of the selenium by placing an electric field across the structure while exposing it to light. A technique is described in which either subsequent polarity reversal or placing a short-circuit across the structure isolates these charges. Exposure to x-ray at this point selectively discharges the selenium surface, thus creating an electrostatic image. Further exposure of the system to a scanning light source produces a displacement current as the structure is totally discharged element by element. The resulting video signal is used to generate images of the charge pattern.
© (1979) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alfonso Zermeno, Alfonso Zermeno, Thomas Kirby, Thomas Kirby, Ronald Cowart, Ronald Cowart, Lee Marsh, Lee Marsh, Poen Ong, Poen Ong, } "Laser Readout Of Electrostatic Images", Proc. SPIE 0173, Application of Optical Instrumentation in Medicine VII, (6 July 1979); doi: 10.1117/12.957128; https://doi.org/10.1117/12.957128
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