Voltage and electric field measuring device using light

Details Voltage and electric field measuring device using light Voltage and electric field measuring device using light

G - Physics

01

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324/59

G01R 19/00 (2006.01) G01R 15/24 (2006.01) G01R 29/08 (2006.01) G01R 29/12 (2006.01)

Patent

CA 1194123

VOLTAGE AND ELECTRIC FIELD MEASURING DEVICE USING LIGHT Abstract: A voltage and electric field measuring device is disclosed. The device uses light, including a polarizer, an electro-optic crystal consisting of a material having an optical rotatory power, and an analyzer arranged in the stated order in the direction of advancement of applied light, with a quarter-wave plate being disposed between the polarizer and crystal or between the crystal and analyzer. The angle of orientation ? of the analyzer, relative to the optical axis of the crystal, is set to the product of ? and ?, where ? represents the optical rotatory power, with respect to the applied light, of the crystal near a point at the center of a range of varying temperatures at the instal- lation environment, and ? represents the thickness of the crystal measured in the direction of advancement of light. The specified relation between ? and ?-? maximizes the tem- perature stability of the device.

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