Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1979-04-02
1981-05-19
Willis, Davis L.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
G01J 100
Patent
active
042687519
ABSTRACT:
A breath analyzer is provided to test for the presence of an unknown infrared energy absorbing compound in a breath sample collected from an individual. Infrared energy of at least two wavelengths is passed through the collected sample. The first wavelength of infrared energy, 3.48 microns for example, is selected to be significantly absorbed by a predetermined infrared energy absorbing compound, such as ethanol. The second wavelength of infrared energy, 3.39 microns for example, is selected to be significantly absorbed by other infrared energy absorbing compounds, such as acetone. The infrared energy remaining in the first wavelength after its passing through the breath sample is compared to the infrared energy remaining in the second wavelength after its passing through the breath sample. The lack of a predetermined comparison value indicates the presence of an infrared energy absorbing compound other than the predetermined infrared energy absorbing compound.
Additionally, the first wavelength of remaining infrared energy is processed to determine the concentration of the predetermined infrared energy absorbing compound present in the breath sample.
REFERENCES:
patent: 3560736 (1971-02-01), Billetdeaux et al.
patent: 3562524 (1971-02-01), Moore et al.
patent: 3792272 (1974-02-01), Harte et al.
patent: 4013260 (1977-03-01), McClatchie et al.
patent: 4057724 (1977-11-01), Adrian et al.
Fritzlen Jack D.
Thul Fred M.
Vogel Douglas R.
CMI Incorporated
Howell Janice A.
Willis Davis L.
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