Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1975-02-18
1978-01-10
McGraw, Vincent P.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250343, 356 73, 356 85, G01J 100, G01J 330
Patent
active
040681254
ABSTRACT:
In laser absorption spectroscopy a fluid sample is irradiated with a beam of coherent optical radiation preferably in the infrared band. A detector such as an acoustic detector or thermal detector is coupled in acoustic or thermal energy exchanging relation, respectively, with the fluid medium to detect the absorption of energy, if any, by the fluid from the beam of coherent radiation. One or more of the physical or chemical parameters of the fluid or substances interacting with the fluid are changed and resultant changes, if any, are detected in the absorption of energy by the fluid to yield information concerning the fluid or substances interacting with the fluid.
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Diax Corporation
McGraw Vincent P.
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