Method and apparatus for measuring the quantities which characte

Details Method and apparatus for measuring the quantities which characte Method and apparatus for measuring the quantities which characte

1979-04-10

1982-01-05

Smith, Alfred E.

Optics: measuring and testing

By polarized light examination

With birefringent element

356366, G01J 400

Patent

active

043091105

ABSTRACT:
An apparatus and method for determining optical properties of a substance by passing a beam of linearly polarized light through the substance. The polarization vector of the light rotates at a definite frequency but the intensity does not depend upon the orientation of the vector. The relative phase shift and/or modulation coefficient of this beam is compared with a reference beam to effect measurements of light absorption, light scattering, linear and circular birefringency, and linear and circular dichroism, all of which can be measured separately or simultaneously by a single instrument.

REFERENCES:
patent: 3558215 (1971-01-01), De Lang et al.
patent: 3724952 (1973-04-01), Vossberg
patent: 4042302 (1977-08-01), Wentz
Danielsson et al., "Polarization Measurement on Spectral Lines of Low Intensity and Short Duration", Jour. Phys. E., vol. 7, 10-74, pp. 817-820.
Clarke et al., "Polarized Light and Optical Measurement", Pergamon Press, 1971, pp. 136-139.

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