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:
Feb. 14, 2017
Filed:
May. 15, 2014
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Norihito Fujinoki, Osaka, JP;
Abstract
The present application discloses electric field measurement device for measuring electric field of a target. Electric field measurement device includes optical waveguide which transmits transmission light, electrode portion, which gives optical characteristics of optical waveguide periodic variation, antenna for setting first state, in which electric field is coupled to optical waveguide, and second state, in which electric field is disconnected from optical waveguide, detector which detects light intensity of emission light emitted from optical waveguide, and applicator which applies voltage to electrode portion to give periodic variation. Applicator includes setting portion, which sets reference voltage in correspondence to light intensity under the second state, and output portion, which outputs voltage in correspondence to difference between reference voltage and induced voltage happening to electrode portion under first state.