Measurement head for a magnetic field gradient vector...

Details Measurement head for a magnetic field gradient vector... Measurement head for a magnetic field gradient vector...

G - Physics

01

R

324/48

G01R 33/022 (2006.01) G01R 33/032 (2006.01)

Patent

CA 1256497

ABSTRACT OF THE DISCLOSURE A measurement head for a magnetic field gradient vector measuring apparatus, comprising essentially a laser diode emitting two light beams aligned along the same axis. Two magnetic field measuring cells are placed in the paths of these light beams. Each cell comprises a wafer coated with a layer of a magnetic material forming a waveguide. The purpose of each cell is to measure the Faraday effect on the polarization of the magnetic field by using a zero method. A difference circuit then calculates the difference between the commands given to each cell so as to find the value of the magnetic field gradient.

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