Voltage detector
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United States of America Patent
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-
May 1, 1990
Grant Date -
N/A
app pub date -
Sep 6, 1988
filing date -
Sep 7, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A voltage detector comprises a pulse light source, a delay means, a dispersing prism made of an electro-optic material and a linear image sensor. The electro-optic material senses a voltage developing in a selected area of an object as a change of its refractive index. An optical path of a pulse light is changed by the dispersing prism according to the change of its refractive index. An output pulse light emerging from the dispersing prism is detected by a linear image sensor. A waveform of the periodic voltage pulses can be detected by gradually delaying a phase of the pulse light emitted from the light source. The voltage developing in one-dimensional positions in the object can be also detected by employing a dispersing prism extending along the positions to be detected and a two-dimensional detector.
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