EP 1055127 A1 20001129 - METHOD AND DEVICE FOR MEASURING A MAGNETIC FIELD WITH THE AID OF THE FARADAY EFFECT
Title (en)
METHOD AND DEVICE FOR MEASURING A MAGNETIC FIELD WITH THE AID OF THE FARADAY EFFECT
Title (de)
VERFAHREN UND EINRICHTUNG ZUM MESSEN EINES MAGNETFELDES MIT HILFE DES FARADAY-EFFEKTES
Title (fr)
PROCEDE ET DISPOSITIF POUR MESURER UN CHAMP MAGNETIQUE PAR EFFET FARADAY
Publication
Application
Priority
- DE 9900390 W 19990211
- DE 19805813 A 19980212
- DE 19851551 A 19981109
Abstract (en)
[origin: US6495999B1] A magnetic field is measured with the aid of the Faraday effect. Light is coupled into a Faraday element subjected to the magnetic field, the light having a linearly polarized first component at a first wavelength and an unpolarized second component at a second wavelength different from the first. A light signal is coupled out of the Faraday element and is split optically into a first light signal component with the first wavelength and a second light signal component with the second wavelength. A first measurement signal is derived from the first light signal component and a second measurement signal is derived from the second light signal component and these are used to form a corrected measurement signal S. In this way, attenuation influences in the transmission paths can be largely compensated for, even when measuring a magnetic field which is constant over time or a magnetic field with a component which is constant over time.
IPC 1-7
IPC 8 full level
G01R 15/24 (2006.01)
CPC (source: EP US)
G01R 15/246 (2013.01 - EP US); G01R 15/247 (2013.01 - EP US)
Citation (search report)
See references of WO 9941617A1
Designated contracting state (EPC)
CH DE FR GB LI NL SE
DOCDB simple family (publication)
US 6495999 B1 20021217; CA 2320037 A1 19990819; CN 1290350 A 20010404; EP 1055127 A1 20001129; NO 20004064 D0 20000811; NO 20004064 L 20001010; WO 9941617 A1 19990819
DOCDB simple family (application)
US 63758600 A 20000814; CA 2320037 A 19990211; CN 99802899 A 19990211; DE 9900390 W 19990211; EP 99914415 A 19990211; NO 20004064 A 20000811