Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1989-08-08
1991-01-01
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
324 77K, 324 98, 250225, 350374, G01R 3100, G01R 1900
Patent
active
049821512
ABSTRACT:
A voltage measuring apparatus comprises an optical probe furnished with an electro-optic material whose refractive index is changed in accordance with a voltage developing in a given part of an object and an auxiliary electrode for terminating electric lines of force coming from the given part, a light source for producing light to be inputted to the electro-optic material, a light polarization detector for detecting a polarization state of output light from the electro-optic material, and a power source for applying a variable voltage to the auxiliary electrode. An absolute value of the voltage in the given part can be determined as a specific value of the variable voltage obtained when no change is detected in the polarization state of the output light.
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Aoshima Shinichiro
Takahashi Hironori
Tsuchiya Yutaka
Burns William J.
Hamamatsu Photonics Kabushiki Kaisha
Karlsen Ernest F.
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