Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1991-02-15
1992-11-10
Cuchlinski, Jr., William A.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
374120, G01J 500
Patent
active
051618907
ABSTRACT:
A method is disclosed for an optical remote measurement of the air temperature at a distance by laser excitation, in which, by means of a laser generator and by excitation of energy band transitions in the Schumann-Runge band of molecular oxygen, fluorescence of the oxygen is caused, the intensities of the fluorescence induced in two different bands are measured, the ratio of these intensities is determined and the temperature is derived therefrom wherein, on a section of appreciable depth, two absorption spectral lines are excited which at least overlap and which belong respectively to two different Schumann-Runge oxygen bands and the emission spectral line of the laser generator has a very small width with respect to that of the absorption spectral lines and its central frequency is adjusted to be substantially close to the maxima of the two absorption spectral lines.
REFERENCES:
patent: 3380055 (1968-04-01), Fow et al.
patent: 4483614 (1984-11-01), Rogers
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Cuchlinski Jr. William A.
Sextant Avionique
Worth W. Morris
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