Measuring system and measuring cell for making magnetic field measurements
US4697145A · kind A · utility
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Key dates
| Filing date | Jan 24, 1985 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Jan 24, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0322
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process and apparatus for measuring a magnetic field based on the Faraday effect rotation of a light beam passing through a ferrimagnetic coating subject to a magnetic field to be measured is shown. The magnetization direction within the ferrimagnetic coating is coherently oriented by applying a high amplitude alternating magnetic field oriented in accordance with the axis of the light beam. This is followed by a progressive reduction of the amplitude of this magnetic field and the magnetic field to be measured is compensated. A system and a measuring cell making it possible to perform said process is also shown.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.