All-angle gradient magnetometer

Details All-angle gradient magnetometer All-angle gradient magnetometer

1980-06-05

1982-04-27

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using optical pumping or sensing device

324302, G01N 2700

Patent

active

043273270

ABSTRACT:
In order to provide an all-angle gradient magnetometer, first and second magnetic resonance cells are mounted to a common base and separated by a predetermined distance. Circularly polarized pumping light is passed through the two cells orthogonally. Mixed with the circularly polarized pumping light is readout light which is linearly polarized. At the output of the cells appropriate filters are provided to filter out the pumping light whereafter the modulated readout light is detected in push-pull manner and fed back to modulate the pumping beams and at the same time fed to signal processing means to permit detecting phase differences between the outputs of the separated cells.

REFERENCES:
patent: 3863144 (1975-01-01), Simpson

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