Optics: measuring and testing – For light transmission or absorption
Patent
1985-09-18
1987-08-25
Rosenberger, R. A.
Optics: measuring and testing
For light transmission or absorption
356440, G01N 2101, G01N 2159
Patent
active
046889426
ABSTRACT:
A radial or azmuthal non-resonant flow-through optoacoustic cell is operated without windows, completely eliminating the window background interference. The cell is constructed of an elongated tube the length of which is 34.times.10.sup.3 cm.times.1/f, where f is the light source modulating frequency and is made of conducting material which is perforated along the center one-half length with holes. A metalized sheath surrounds this center region to form a capacitor microphone.
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Kreuzer, L. B., "Ultralow Gas Concentration Infrared Absorption Spectrosc", Journal of Applied Physics, vol. 42, No. 7 (Jun. 1971), pp. 2934-2943.
Patel et al, "A New Optoacoustic Cell with Improved Performance", Appl. Phys. Lett., vol. 30, No. 11 (1 Jun. 1977), pp. 578-579.
Gerlach et al, "Brewster Window and Windowless Resonant Spectrophones for Intracavity Operation", Appl. Phys., vol. 23, No. 3 (Nov. 1980), pp. 319-326.
White, Harvey, "Modern College Physics", fourth edition, copyright 1962, D. Van Nostrand Company, Inc., New York, pp. 275-277.
Denton Medona B.
Tilden Scott B.
Phillips Thomas M.
Rosenberger R. A.
The United State of America as represented by the Secretary of t
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