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. 11, 1986
Filed:
Jul. 13, 1983
Applicant:
Inventors:
Kazuyuki Nagatsuma, Hachioji, JP;
Hiroyoshi Matsumura, Saitama, JP;
Toshio Katsuyama, Hachioji, JP;
Tsuneo Suganuma, Tokorozawa, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
2502 / ; 250227 ;
Abstract
An electric-field measuring apparatus utilizing electrooptic effect for measuring the intensity of an electric DC field includes a material exhibiting both electrooptic effect and photoelectric effect or both a material exhibiting the electrooptic effect and a material exhibiting the photoelectric effect which material or materials are irradiated with a continuous light ray of a wavelength capable of inducing the electrooptic effect and an intermittently interrupted light ray of a wavelength capable of inducing the photoelectric effect.