Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1994-08-12
1995-09-26
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
356440, G01N 2161
Patent
active
054536200
ABSTRACT:
A nondispersive infrared gas analyzer 10 for indicating the concentration of a selected gas uses a source of radiation 12 to supply radiation to a gas sample chamber 14. The gas chamber 14 functions as an optical channel for transmitting radiation from the source of radiation 12 to both a gas sensing detector 22 and reference detector 24. An inner surface 36 of the gas chamber 14 is an optical reflective surface for the chamber and has a constantly changing irregular profile to greatly enhance optical scattering of the radiation falling on it to provide an uniform disperse radiation output to the detectors 22, 24. Additionally, the source of radiation 12 is chosen to provide radiation which is defocused to further help in attaining homogenous radiation output from the gas sample chamber 14 to the detectors 22, 24.
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McCardel William L.
Wadsworth Mark V.
Whitney Julie G.
Baumann Russell E.
Donaldson Richard L.
Fields Carolyn E.
Grossman Rene E.
Texas Instruments Incorporated
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