Infrared Imaging Borehole Probe (Infrared Borehole Imaging Probe).
For Reference Only At Bureau Libraries :89 pages
A thermal imaging borehole probe was designed and fabricated to obtain thermal images, through smoke, of objects and people in underground mines. The effort was basically unsuccessful; electrical noise, and possibly thermal noise, interfered with the desired signals to the extent that spatial resolution in the images was unacceptable.
CP; Final Contract Report;
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Xerox Electro-optical Systems