Reflection type magnetooptic sensor head with faraday rotator

Electricity: measuring and testing – Magnetic – Magnetometers

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359280, G01R 33032

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active

054932220

ABSTRACT:
A reflection type magnetooptic sensor head. The respective structural elements are aligned in the order of a light source, light inputting/outputting path, polarizer, Faraday rotator, and reflecting film. The Faraday rotator is made of a (111) bismuth-substituted iron garnet single crystal film. The Faraday rotator is positioned such that the optical axis of the light incident upon the surface of the Faraday rotator makes an angle of 10 to 70 degrees with an axis normal to the surface of the Faraday rotator. The sensor head may further include two identical rectangular prisms positioned such that the Faraday rotator is sandwiched between the slanting surfaces of the prisms.

REFERENCES:
Magneto-Optical Garnet Materials in Fibre Optic Sensor Systems for Magnetic Field Sensing Kjell Svantesson--pp. 260-269, SPIE vol. 1274, Electro-Optic and Magneto-Optic Materials II (1990).
Soviet Inventions Illustrated--Section EI, Week 8422, Jul. 1, 1984; Derwent Publications Ltd., London & SU-A-1 038 894, Aug. 1983.

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