Optics: measuring and testing – For light transmission or absorption
Patent
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.
Uno Masahiro
Watanabe Atsuo
Birchard Bruce L.
Fuji Electric & Co., Ltd.
Rosenberger R. A.
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