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. 28, 2024
Filed:
Mar. 26, 2021
Seikoh Giken Co., Ltd., Matsudo, JP;
Rohm Co., Ltd., Kyoto, JP;
Ryuji Osawa, Matsudo, JP;
Noriaki Hiraga, Kyoto, JP;
Abstract
An optical voltage probe includes: an optical modulatorhaving two modulation electrodesand, the optical modulatorbeing configured to modulate an intensity of an incident light depending on a voltage between the two modulation electrodes and output the incident light which is modulated; an input/output optical fiberconnected with the optical modulator; two contact terminal attachment portionsto which contact terminalscan be detachably attached and contacted, the two contact terminalsbeing configured to be in contact with the points to be measured, the two contact terminal attachment portionsbeing respectively connected with the modulation electrodes; and a packagethat houses the optical modulatorand a part of the input/output optical fiber. A voltage signal induced via the contact terminalsis converted into an optical intensity modulation signal. When an electric wave having a measurement frequency is applied while the contact terminal attachment portionsare opened, the packageexhibits a shielding effect of attenuating the electric wave by 15 dB or more compared to an output signal intensity measured without providing the package.