The Fabry-Perot interferometer is commonly used as a narrow-bandpass filter or as an instrument to measure spectral linewidths. Fabry-Perot interferometer (etalon)Fabry-Perot interferometers that cannot be scanned are called etalons.
Schematic of a Fabry-Perot etalonTransmission through a Fabry-Perot interferometer as a function of wavelengthRelated TopicsOther InterferometersOpticsOptical Materials
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