Temperture and pressure monitors utilizing interference filters
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United States of America Patent
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-
Nov 28, 1989
Grant Date -
N/A
app pub date -
Apr 25, 1988
filing date -
Apr 25, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An interference edge filter is mounted on the end of an optical fiber to provide a sensor for pressure or temperature. The filter is formed such that the transition slope of the filter curve will move to the left or right depending upon the changes in the parameter being monitored. The shift in the position of the slope of the edge filter curve is detected by passing the reflected light through an interference bandpass filter having an edge slope intersecting the transition slope and measuring the intensity of the light passing the bandpass filter.
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