Device for measuring the gradient of a magnetic field by the mag

Details Device for measuring the gradient of a magnetic field by the mag Device for measuring the gradient of a magnetic field by the mag

1984-10-01

1986-11-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231R, 324244, G02F 101

Patent

active

046211926

ABSTRACT:
A device for measuring the gradient of a magnetic field comprises on the same support two magnetooptical layers separated by a half-wave plate. A linearly polarized light beam successively passes through these three optical components and its polarization plane rotates by a value proportional to the gradient of the field in its propagation direction.

REFERENCES:
patent: 3272988 (1966-09-01), Bloom et al.
patent: 3927947 (1975-12-01), Kasai
The Review of Scientific Instruments, vol. 32, No. 4, Avril 1961, pp. 444-448, New York (USA); R. M. Morris et al.: "Design of a Second Harmonic Flux Gate Magnetic Field Gradiometer", *FIG. 3; p. 445.

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