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1. WO2000013033 - ELECTRO-OPTIC VOLTAGE SENSOR

Publication Number WO/2000/013033
Publication Date 09.03.2000
International Application No. PCT/US1999/019742
International Filing Date 31.08.1999
IPC
G01R 1/07 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
1Details of instruments or arrangements of the types covered by groups G01R5/-G01R13/122
02General constructional details
06Measuring leads; Measuring probes
067Measuring probes
07Non contact-making probes
CPC
G01R 1/071
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
1Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
02General constructional details
06Measuring leads; Measuring probes
067Measuring probes
07Non-contact-making probes
071containing electro-optic elements
G01R 15/242
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
15Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00 and G01R33/00 - G01R35/00
14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
24using light-modulating devices
241using electro-optical modulators, e.g. electro-absorption
242based on the Pockels effect, i.e. linear electro-optic effect
Applicants
  • LOCKHEED MARTIN IDAHO TECHNOLOGIES COMPANY [US]/[US]
Inventors
  • DAVIDSON, James, R.
  • CRAWFORD, Thomas, M.
  • SEIFERT, Gary, D.
Agents
  • GOODSON, W., Gary
Priority Data
60/098,79401.09.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ELECTRO-OPTIC VOLTAGE SENSOR
(FR) CAPTEUR DE TENSION ELECTRO-OPTIQUE
Abstract
(EN)
An electro-optic voltage sensor system includes a sensor (40) disposed in an E-field, a transmitter (34) for producing the electro-magnetic beam, detectors (162, 164) for converting the two beams into electrical signals and a signal processor (174) for determining the voltage. The sensor (40) receives a source beam (38) and includes a polarization beam displacer (80) for separating the source light beam (38) into two beams with orthogonal linear polarizations, a wave plate (104) for rotating the linear polarization to rotated polarization, a transducer (114) utilizing pockels electro-optic effect for inducing a differential phase shift on the major and minor axes of the rotated polarization in response to the E-field, a prism (130) for redirecting the beam back through the transducer (114) and also converts the rotated polarization to circular or elliptical polarization.
(FR)
Un système de capteur de tension électro-optique comprend un capteur (40) placé dans un champ électrique (champ E), un émetteur (34) qui produit le faisceau électromagnétique, des détecteurs (162, 164) qui convertissent les deux faisceaux en signaux électriques et un processeur (174) de signal qui détermine la tension. Le capteur (40) reçoit un faisceau source (38) et comprend un dispositif de déplacement (80) de la polarisation du faisceau qui sépare le faisceau (38) de lumière source en deux faisceaux ayant des polarisations orthogonales linéaires, une plaque mobile (104) qui fait tourner la polarisation linéaire en polarisation orientée, un transducteur (114) qui utilise l'effet électro-optique de Pockels pour induire un déphasage différentiel sur les grands et les petits axes de la polarisation orientée en réponse au champ E, un prisme (130) qui renvoie le faisceau par le transducteur (114) et qui convertit également la polarisation orientée en polarisation circulaire ou elliptique.
Also published as
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