Current measuring magnetic field sensor having magnetooptic elem

Details Current measuring magnetic field sensor having magnetooptic elem Current measuring magnetic field sensor having magnetooptic elem

1988-04-11

1990-01-23

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324244, 350376, G01R 33032, G01R 1900, G02F 109

Patent

active

048961035

ABSTRACT:
The magnetic field sensor is described for sensing the magnetic field, which comprises a light source part, a magnetic field detection part which contains a magnetooptic element consisting of a magnetic materials having a magnetooptic effect, and a light measurement part which measures the light that has been radiated from the light source part and has passed through the magnetic field detection part, is characterized in that the magnetooptic element is arranged such that its easy axis of magnetization is at substantially right angles to the direction of the magnetic field to be measured. The sensor can measure in a wide range of magnetic field with a high degree of accuracy and high sensitivity.

REFERENCES:
patent: 3245314 (1966-04-01), Dillon
patent: 3316050 (1967-04-01), Ferguson et al.
patent: 3527577 (1970-09-01), Fan et al.
patent: 4225239 (1980-09-01), Prinz
patent: 4604577 (1986-08-01), Matsumura et al.
Doriath et al, A Sensitive and Compact Magnetometer Using Faraday Effect in YIG Waveguide, J. Appl. Phys., vol. 53, No. 11, Nov. 1982, pp. 8263-8265.
Mastushita Techno Report, vol. 29, No. 5, Oct. 1983, pp. 70-80.
Keiso, vol. 26, No. 11, Oct. 1983, pp. 56-60.

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