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:
Aug. 29, 1995
Filed:
Aug. 26, 1993
Hisakazu Okajima, Nishikasugai, JP;
Masanobu Yamamoto, Handa, JP;
NGK Insulators, Ltd., , JP;
Abstract
An optical voltage electric field sensor of the type which includes a light source, a polarizer for linearly polarizing an incident light beam emanated from the light source, a phase plate for applying a phase difference to the linearly polarized light beam, a Pockels element for modulating the linearly polarized light beam applied with the phase difference in accordance with a voltage or electric filed applied thereto, an analyzer for separating the modulated light beam into a S-polarized light beam and a P-polarized light beam, a first light-receiving element arranged to receive the S-polarized light beam for converting the S-polarized light beam into a first electric signal V.sub.1 indicative of the intensity of the light beam, and a second light-receiving element arranged to receive the P-polarized light beam for converting the P-polarized light beam into a second electric signal indicative of the intensity of the light beam. The sensor further includes a first calculation circuit for calculating an equation