Voltage detector using electro-optic material and interference of light beams
First Claim
1. A voltage detector for detecting a voltage developing in a selected area of an object to be measured, comprising:
- a light source for emitting a light beam;
a first optical path including first reflection means and a first electro-optic material for sensing said voltage developing in said object as a change in a refractive index thereof;
a second optical path including second reflection means;
splitting means for splitting said light beam introduced from said light source into a first light beam going along said first optical path and a second light beam going along said second optical path, causing return first and second light beams reflected from said respective first and second reflection means to interfere with each other, and extracting an output interference light beam; and
detection means for determining said voltage developing in said selected area of said object on the basis of intensity of said received output interference light beam.
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Accused Products
Abstract
In a voltage detector using an electro-optic material whose refractive index is changed by a voltage developing in a selected area of an object under test, a light beam emitted from a light source is applied to a beam splitter, where it is split into a light beam advancing along a reference optical path and a light beam advancing along an optical path extended to an optical path length changing means made of the electro-optic material, and the light beams are returned from the reference optical path and the optical path length changing means after reflection to the beam splitter, where they are caused to interference with each other to provide an output light beam which is applied to a detector. The efficiency of light beam utilization is improved, and the voltage developing in the selected area of the object can be detected with high accuracy.
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Citations
10 Claims
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1. A voltage detector for detecting a voltage developing in a selected area of an object to be measured, comprising:
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a light source for emitting a light beam; a first optical path including first reflection means and a first electro-optic material for sensing said voltage developing in said object as a change in a refractive index thereof; a second optical path including second reflection means; splitting means for splitting said light beam introduced from said light source into a first light beam going along said first optical path and a second light beam going along said second optical path, causing return first and second light beams reflected from said respective first and second reflection means to interfere with each other, and extracting an output interference light beam; and detection means for determining said voltage developing in said selected area of said object on the basis of intensity of said received output interference light beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification