Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1989-06-05
1991-03-12
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503381, 250339, 250347, G01J 345, G01J 300
Patent
active
049994980
ABSTRACT:
A particular area or areas are monitored for the presence of gaseous materials, particularly pollutants by analyzing background infrared radiation present in the selected area with a spectrometer and making the results of this analysis available in a form understandable to the person or device monitoring the area for the presence of specified gaseous materials. The results of the spectrometric analysis may, for example, be displayed on a video unit or they may be printed. Apparatus useful in the practice of this invention generally includes an interferometer of the Michaelson-Morely type having specific optical characteristics, a sensitive infrared detector, electronic data processor, and a device which records and/or displays the results of the determination(s).
In a preferred embodiment, no radiation concentrating or focusing elements are used ahead of the beamsplitter of the Michelson-Morely interferometer, said interferometer having imaging optics which, combined with detector size, results in the optical field of view being essentially no larger than the area of the remote source employed.
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William F. Hertet et al, Remote Fourier Transform Inrrared Air Pollution Studies, Optical Engineering, vol. 19, No. 4, Jul./Aug. 1980, 508-415.
Hunt Robert N.
Sandridge Robert L.
Gil Joseph C.
Glick Edward J.
Hannaher Constantine
Mobay Corporation
Whalen Lyndanne M.
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