1
Poen S Ong, Alfonso Zermeno, Lee M Marsh Jr, James M Hevezi, Ronald W Cowart: Electrostatic imaging apparatus. University of Texas System, Dula Shields & Egbert, June 4, 1985: US04521808 (44 worldwide citation)

An image scanning apparatus for obtaining radiographic information from a detector system. The apparatus produces a video signal by optical readout of a latent image found in a detector system. The video signal is processed and displayed to provide radiographic information.


2
Poen S Ong, Alfonso Zermeno, Lee M Marsh Jr, James M Hevezi: Electrostatic imaging method. University of Texas System, Dula Shields & Egbert, May 1, 1984: US04446365 (17 worldwide citation)

A method of operating a photodetector system. The method impresses a surface charge on a photon detector by establishing an electric potential across the detector, storing the detector in the dark, disconnecting the source of electric potential, and electrically connecting layers in the detector.


3
Poen S Ong: Method for using secondary radiation scattering to evaluate the thickness of materials. University of Houston, Fulbright & Jaworski, March 16, 1993: US05195117 (15 worldwide citation)

A method for using secondary radiation scattering to evaluate the thickness of materials. The thickness of a first material adjacent to a second material may be evaluated by bombarding the first material with radiation and measuring the radiation scattered by the second material behind it. The metho ...


4
Poen S Ong: Light switched segmented tomography detector. December 14, 1982: US04363969 (10 worldwide citation)

An array of optically isolated small area scintillators overlie a duophotoconductive sandwich, which includes interdigitated electrodes. The sandwich structure wound each interdigitated electrode is precharged to act as a separate small area detector. The duophotoconductive sandwich includes a photo ...