Variable field of view heat scanner
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United States of America Patent
Stats
-
Dec 2, 1986
Grant Date -
N/A
app pub date -
Apr 9, 1984
filing date -
Apr 9, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hand held radiation detector is adapted for scanning the subject while a bar graph at one end of the detector is observed. The field of view of the radiation detector is variable by means of removable lens assemblies which have Fresnel lenses positioned at the focal lengths of the lenses from the radiation sensor. The lens assemblies are matched to provide the same flux density to the radiation sensor independent of the field of view. Crosshairs provided on the rear of a lens support assist in aiming the radiation detector. The time constant of the display is varied with the sensitivity of the display.
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