Method of measuring low concentrations of a light absorbing comp

Details Method of measuring low concentrations of a light absorbing comp Method of measuring low concentrations of a light absorbing comp

1976-02-27

1980-07-22

McGraw, Vincent P.

Optics: measuring and testing

Oil testing

250573, 356436, G01N 3328, G01N 2100

Patent

active

042136997

ABSTRACT:
A laser beam is transmitted through a medium containing the component to be measured. The wavelength of the beam is such that it is absorbed by the component but not by the remainder of the medium. The divergence of the beam is measured to indicate a change in the index of refraction of the medium due to the absorption by the component.

REFERENCES:
"Accurate and Sensitivity of the Thermal Lens Method for Measuring Absorption.", Solimini, Applied Optics, vol. 5 #12 pp. 1931-1939, Dec. 1966.

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