Optical device for sensing magnetic inductions
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United States of America Patent
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Jun 2, 1992
Grant Date -
N/A
app pub date -
Mar 5, 1991
filing date -
Mar 9, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for measuring a magnetic induction comprises an evaluation device including a source for emitting light and a receiver for receiving light. A resonator is located in the light path between the source and the receiver and comprises first and second parallel mirrors and a gaseous medium occupying the space between the two mirrors. A converter is coupled to one of the mirrors for shifting one of said mirrors along an optical axis of the resonator so that the optical length of the resonator varies in response to the induction to be measured.
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