Modular fiber optic chemical sensor
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United States of America Patent
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Apr 25, 1989
Grant Date -
N/A
app pub date -
Nov 25, 1987
filing date -
Nov 25, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A modular fiber optic chemical sensor (FOCS) is formed using a capillary tube clad. A fiber optic core with reactive surface is exposed to a sample environment and then the capillary tube is fitted over the core. The capillary could also be porous so that in-situ measurements can be made. The capillary can be spaced from the core so that a flow channel for gas and liquid sensing is formed, or an index matching fluid may fill the channel. Measurements can be made in a compact portable modular detector unit in which the FOCS is placed between an excitation source and a detector or single ended where the excitation source and detector are at the same end of the core and a reflector is placed at the end of the core.
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