High sensitivity optical magnetic field sensors having a magneto

Details High sensitivity optical magnetic field sensors having a magneto High sensitivity optical magnetic field sensors having a magneto

1990-08-24

1992-08-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

324 96, H01J 516

Patent

active

051401568

ABSTRACT:
A high sensitivity optomagnetical sensor comprising a light source, a magnetic field-detecting section, a light-receiving section for receiving light emitted from the light source through the magnetic field-detecting section, a measurement-controlling section for controlling the light source, the magnetic field-detecting section, and the light-receiving section, and for measuring an intensity of light received by the light-receiving section, and light transmission paths using optical fibers for optically connecting the light-source section and the magnetic field-detecting section and optically connecting the magnetic field-detecting section and the light-receiving section. The magnetic field-detecting section is constituted by a polarizer, an analyzer and a magnetooptical element arranged between the polarizer and the analyzer. A garnet type ferrite polycrystal is used as a magnetooptical element of the sensor. The ferrite polycrystal has a Verdet constant of not less than 1 deg/cm.Oe, a thickness of not less than 100 .mu.m, a light transmittance of not less than 10%, a temperature dependency on detecting the magnetic field in a temperature range of -20.degree. to +60.degree. C. being within .+-.1.0%, a magnetic field-detecting precision of not more than 1/10,000, and a composition of Bi.sub.x Gd.sub.y Y.sub.z Fe.sub.5 O.sub.12 (X+Y+Z=3).

REFERENCES:
patent: 4896103 (1990-01-01), Shimanuki et al.
patent: 4947107 (1990-08-01), Doerfler et al.
patent: 4973899 (1990-11-01), Jones

Affiliated with

Also associated with

Rating

High sensitivity optical magnetic field sensors having a magneto does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High sensitivity optical magnetic field sensors having a magneto, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High sensitivity optical magnetic field sensors having a magneto will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1250436