Patent · US Expired

Optical measuring method and device for measuring a magnetic alternating field with an expanded measuring range and good linearity

US6114846A · kind A · utility

9Cited by

7References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Thomas Bosselmann · Erlangen, DE
Peter Menke · Erlangen, DE

Key dates

Filing date	Jan 8, 1999
Grant date	Sep 5, 2000
Priority date	—
Expiry date	Jan 8, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/0322
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Linearly polarized measuring light is split after traversing a Faraday sensor device into two partial light signals having planes of polarization inclined at 45.degree.. A measured signal, which is proportional to the tangent of the Faraday rotation angle, is derived from the two partial light signals.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.