Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1978-10-13
1981-05-05
Willis, Davis L.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250342, G01J 100
Patent
active
042661307
ABSTRACT:
An improved clear air turbulence (CAT) detector sensing infrared radiation in the 27-33 micrometer range of the water vapor rotational wavelength band. The improved clear air turbulence detector for use on an aircraft includes a forward looking and upwardly oriented between 8.degree. to 12.degree. optical assembly having a thallium bromoiodide infrared lens, a 27-33 micrometer wavelength interference filter and an infrared detector; a radiometer amplifier for amplifying the output of the optical assembly and for generating an analog voltage signal related to the received infrared intensity, a processing unit for analyzing the analog signal, and a display unit for generating a first signal when no clear air turbulence is detected, a second signal when a moderate turbulence is detected, and a third signal when extreme turbulence is detected. A method for determining the advance time for entering the clear air turbulence after detection is based upon the altitude of the aircraft.
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Englert Alvin J.
Fields Carolyn E.
Pawlikowski Eugene J.
The United States of America as represented by the Secretary of
Willis Davis L.
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