Apparatus and method for measuring the magnitude of polarization

Details Apparatus and method for measuring the magnitude of polarization Apparatus and method for measuring the magnitude of polarization

1979-02-15

1981-05-26

Rosenberger, R. A.

Optics: measuring and testing

By polarized light examination

With polariscopes

350331R, G02F 113, G01J 400

Patent

active

042695112

ABSTRACT:
An accurate, relatively low cost and reliable apparatus and method for measuring the magnitude or degree of polarization of light, particularly adaptable to the measurement of fluorescence polarization. An electric field in sequentially applied to a field-effect liquid crystal to sequentially apply respective perpendicular polarization components from a light source to a fixed polarizer having a fixed plane of polarization. The respective polarization components are sequentially applied to detector and measuring apparatus for determining the magnitude of polarization. Memory means are included for storing a correction factor to compensate for polarization rotation errors due to the liquid crystal. Stored in the memory means is a correction factor for a range of measured values, the correction factor being obtained by direct comparisons with expected values for known polarizations.

REFERENCES:
patent: 3157727 (1964-11-01), Hardy et al.
patent: 3230820 (1966-01-01), Wisnieff
patent: 3345907 (1967-10-01), Wada
patent: 3356438 (1967-12-01), Macek et al.
patent: 3501220 (1970-03-01), Bernal et al.
patent: 3520617 (1970-07-01), Webb
patent: 3646331 (1972-02-01), Lord
patent: 3749474 (1973-07-01), Cartmell
Carroll et al., "Measurement of Optical Activity: New Approaches", Science, vol. 142 (Oct. 11 1963) pp. 200-208.

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