Word: thermograph
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Dates: during 1970-1979
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...fact, the optics of a typical thermograph somewhat resemble early television. Using tilting and moving mirrors, the Barnes cameras scan the target horizontally and vertically. With each movement of the mirrors, the infra-red detectors take what are, in effect, quick temperature readings of a tiny portion of the subject. Before a picture is completed, as many as 40,000 "bits" of such information may be needed. The picture may be shown simply in black and white with shades of gray representing different temperature ranges. But color can be added with the use of appropriately positioned filters. Whenever there...
Thermography has also proved helpful in finding flaws in aircraft assemblies, checking electronic circuitry and discovering diseased crops. It has even trapped smugglers. Equipped with a thermograph, border police in one Middle Eastern country found unusual heat coming from one area of a water-tank truck. An immediate inspection revealed that part of the cargo was indeed hot; it was a huge haul of hashish...