The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2005
Filed:
Mar. 22, 2004
Klaus Bohnert, Oberrohrdorf, CH;
Andreas Frank, Zurich, CH;
Hubert Brändle, Oberengstringen, CH;
ABB Research LTD, Zurich, CH;
Abstract
The voltage sensor for measurement of a voltage V, which is present between two electrodes () and generates an electric field E, comprises at least two layers () made of electro-optically active material and being arranged along a light path (). Through the layers there passes a light beam, the phase and/or state of polarization of which is influenced on account of the electro-optical effect. The orientation of the electro-optically active layers () relative to the light path and the electric field E is chosen in such a way, that the influencing of the light () in the second layer () counteracts the influencing of the light () in the first layer (). In this way, it is possible to realize a sensor with a high half wave voltage, so that high voltages V can be measured unambiguously. A plurality of first and second electro-optically active layers are advantageously arranged between the electrodes ().