Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1991-08-23
1993-03-02
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250339, 250340, 250343, G01N 2171
Patent
active
051912155
ABSTRACT:
A method and apparatus for enabling analysis of a flowable material enclosed in a transport system having an infrared transparent wall portion. A temperature differential is transiently generated between a thin surface layer portion of the material and a lower or deeper portion of the material sufficient to alter the thermal infrared emission spectrum of the material from the black-body thermal infrared emission spectrum of the material, and the altered thermal infrared emission spectrum is detected through the infrared transparent portion of the transport system while the altered thermal infrared emission spectrum is sufficiently free of self-absorption by the material of emitted infrared radiation. The detection is effected prior to the temperature differential propagating into the lower or deeper portion of the material to an extent such that the altered thermal infrared emission spectrum is no longer sufficiently free of self-absorption by the material of emitted infrared radiation. By such detection, the detected altered thermal infrared emission spectrum is indicative of characteristics relating to molecular composition of the material.
REFERENCES:
patent: 4883963 (1989-11-01), Kemeny et al.
patent: 5070242 (1991-12-01), McClelland et al.
patent: 5075552 (1991-12-01), McClelland et al.
Jones Roger W.
McClelland John F.
Hannaher Constantine
Iowa State University & Research Foundation, Inc.
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