Single-channel gas concentration measurement method and apparatus using a short-resonator Fabry-Perot interferometer
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United States of America Patent
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Jul 8, 1997
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Dec 18, 1995
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Jan 13, 1993
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Abstract
A single-channel gas concentration measurement method and apparatus. According to the method, a radiant source is employed to generate a measuring signal, the measuring signal is subsequently directed to a measurement object containing a gas mixture to be measured, the measuring signal is subsequently bandpass filtered using at least two passband wavelengths, and the filtered measuring signals are detected by a detector. According to the invention, the bandpass filtering step is implemented by a single electrostatically tunable, short-resonator Fabry-Perot interferometer.
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