Photoacoustic spectrometer with analysis-signal enhancement

Details Photoacoustic spectrometer with analysis-signal enhancement Photoacoustic spectrometer with analysis-signal enhancement

1979-09-28

1981-06-16

Rosenberger, Richard A.

Optics: measuring and testing

For light transmission or absorption

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250345, 324 77G, G01N 2100

Patent

active

042734509

ABSTRACT:
By autocorrelating the sample photoacoustic response signal and the reference photoacoustic response signal, respectively, obtained from the sample and reference cells, of a photoacoustic spectrometer, and cross-correlating the autocorrelated signals to produce a third signal, simple mathematical operations upon the resulting three signals will produce accurate sample analysis free from the effects of the noise arising from sample illumination intensity variations and other random phenomena.

REFERENCES:
patent: 3295362 (1967-01-01), Wood et al.
patent: 3631339 (1971-12-01), Low et al.
patent: 3700890 (1972-10-01), Kruezer
patent: 3948345 (1976-04-01), Rosencwaig

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