Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1979-07-18
1981-12-01
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
356342, G01J 142, G01N 2100
Patent
active
043038620
ABSTRACT:
A clear air turbulence detector includes an ultraviolet laser for generating a coherent beam which scans an area on an aircraft's flight path. A photodetector monitors optical radiation backscattered from the area, providing an intensity-controlling electrical signal for a CRT display. Updrafts contain greater-than-normal amounts of ultraviolet-absorbing water vapor and result in a blank spot on the display while downdrafts contain less-than-normal amounts of water vapor and result in a bright spot on the display.
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Brufsky Allen D.
Fields Carolyn E.
Smith Alfred E.
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