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In fabry protection Interferometer we analysis the transmitted light |
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Answer» ELECTRICALLY Tunable Micromachined Fabry-Perot Interferometer The Fabry-Perot interferometer is an optical resonator consisting of two parallel MIRRORS. Fabry-Perot interferometers can be made by silicon bulk micromachining.45,46 Silicon surface micromachining is also a suitable technique for making interferometers for infrared wavelengths. The principle of a gas concentration measurement system operating on an electrically tunable micromachined Fabry-Perot interferometer is NDIR (non-dispersive infrared) single-beam dual-wavelength measurement.46 The interferometer is tuned so that the pass band coincides with the absorption band of the measured gas. A DETECTOR records the signal STRENGTH after the measurement chamber. The pass band of the Fabry-Perot interferometer then shifts to EITHER side of the absorption band, and the signal now detected constitutes the reference signal |
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