Photoacoustic spectrometer

Details Photoacoustic spectrometer Photoacoustic spectrometer

1980-11-25

1984-03-13

Rosenberger, R. A.

Optics: measuring and testing

For light transmission or absorption

356440, 250343, 250345, 250351, G01N 2100

Patent

active

044364288

ABSTRACT:
By the use of one or more beams of chopped, variable-frequency, monochromatic light to illuminate the sample chamber of at least one gas-filled cell including such sample chamber and a reference chamber joined to the sample chamber by a tunnel-like opening or orifice which permits fluid communication between the chambers and incorporating a thermal-flowmeter-type sensor element in the path of flow of the fluid between the chambers of each such cell, the compositional characteristics of one or more samples in each sample chamber can be determined accurately.

REFERENCES:
patent: 3560738 (1971-02-01), Strange
patent: 3758786 (1973-09-01), Weinel
patent: 3811782 (1974-05-01), Kerr
patent: 3948345 (1976-04-01), Rosencwaig
patent: 4019056 (1977-04-01), Block et al.
patent: 4028932 (1977-06-01), Rosencwaig
patent: 4067653 (1978-01-01), Fletcher et al.
patent: 4253770 (1981-03-01), Horiba
Schleusener et al. "Differential Spectrophone Measurement of the Absorption of Laser Energy by Atmospheric Dust" Applied Optics vol. 14, No. 11 (Nov. 1975) pp. 2564-2565.

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