A laser system employing acousto-optic deflectors and a Bi12S1020 Pockels readout optical modulator (PROM) has been assembled for imaging with ionizing radiation. A primary motivation was to produce a remotely operable imaging device relatively impervious to electromagnetic disturbances and to high levels of background radiation--effects commonly plaguing our TV systems. The laser beam raster-scans the image imprinted on the PROM and the transmitted light is sensed by a high-current photomultiplier. The detector output can be cast into a TV format for display convenience, or can be digitized, independent of scanning format, for storage and processing. The information is directly imprinted on the PROM by an x-ray, gamma-ray, or neutron field. This sensing technique resulted from efforts to understand the background radiation effects on the PROM. The system has proved stable and background insensitive. In a recent experiment at the Nevada Test Site the scanner suffered no adverse effects while a parallel TV system lost some data. Advan-tages other than background immunity include (1) long image integration/storage time, (2) random or programmed, nondestructive sampling of the accumulating image, and (3) scan format versatility.
G. J. Berzins,
"On-Line Laser Scanner System For Imaging With Ionizing Radiation", Proc. SPIE 0216, Optics in Adverse Environments II, (5 August 1980); doi: 10.1117/12.958464; https://doi.org/10.1117/12.958464