Electro-optic measurement of voltage on high-voltage power lines

Details Electro-optic measurement of voltage on high-voltage power lines Electro-optic measurement of voltage on high-voltage power lines

1976-02-26

1977-01-11

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324 51, G01R 3100

Patent

active

040029751

ABSTRACT:
Crystals which vary the polarization of a beam of light according to the intensity of the electrical or magnetic field in the crystal are placed in the vicinity of a high-voltage power line. A laser beam is directed from an elctrically isolated position through the crystal and is reflected to the isolated position. The change in polarization of the returned beam is measured to indicate the intensity of the field. Temperature measurement and thermal compensation are provided because of temperature variations in the polarization modulation coefficient of the crystals.

REFERENCES:
patent: 3466541 (1969-09-01), Bernard et al.
patent: 3597683 (1971-08-01), Saito et al.
patent: 3605013 (1971-09-01), Yoshikawa et al.
patent: 3675123 (1972-07-01), Hermstein et al.
patent: 3675125 (1972-07-01), Jaecklin
patent: 3746983 (1973-07-01), Renz

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