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:
May. 05, 1992
Filed:
Jul. 11, 1990
Yoshinari Kozuka, Nagoya, JP;
Yuichi Kakizaki, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
A method for optically measuring an AC electric field or an AC voltage is disclosed. According to the method, a light beam emitted from a light-emitting portion is transmitted through a sensing head including a Pockel's-effect element while an AC electric field to be measured is applied to the Pockel's-effect element, so that the light beam is modulated by the applied AC electric field. The transmitted light beam is then received by a light-detecting portion, while in turn produces an electric signal corresponding to the received light beam. From the electric signal are selected a first component (E.omega.) having a same angular frequency as that of the AC electric field, and a second component (E.sub.2 .omega.) having an angular frequency which is two times that of the AC electric field. Then, a ratio (E.sub.2 .omega./E.omega.) of the second component to the first component is calculated so as to determine a strength of the AC electric field or a magnitude of the AC voltage which produces the AC electric field, based on the ratio (E.sub.2 .omega.E/.omega.).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile