Apparatus for measuring electrical or magnetic fields by absorption spectrum change
US4356448A · kind A · utility
30Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1980 |
| Grant date | Oct 26, 1982 |
| Priority date | — |
| Expiry date | May 23, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/174
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber optical measuring device for measuring a magnetic or electric field comprises an optical modulator influenced by the field. The optical properties of the modulator are dependent on the magnetic or electric field acting on the modulator. The optical property which is made use of is the field dependence of at least one absorption edge of the radiation absorption spectrum of the modulator material. Optical fibers may be used for feeding light into the modulator and for leading away light that has passed through the modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.