Optical microphone
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United States of America Patent
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Apr 25, 2000
Grant Date -
N/A
app pub date -
Jun 5, 1997
filing date -
Jun 13, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an optical microphone including a light source, a fiber optic cable and a Fabry-Perot interferometer with two reflectors, wherein one end face of the fiber optic cable forms a first reflector and the second reflector is arranged at a distance therefrom and is displaceable by fluctuations in the sound air pressure, the second reflector is the end face of a glass fiber section which is displaceable by induced air pressure by means of a separate diaphragm that is coupled thereto. The light source may be a super luminescent diode (SLD).
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