Spectrometers can be classified into several types, including prism, grating, Fourier transform (such as Michelson, Mach–Zehnder, and Sagnac interferometers), tunable filter (such as Fabry–Pérot, acousto-optic and liquid crystal tunable filters) spectrometers, as well as reconstructive spectrometers 2 (comprising spectral response and spectral-to-spatial mapping types). ![]() Within the realm of astronomical and remote sensing instruments, the optical spectrum analyzer (OSA), 1 or spectrometer, holds significant importance. It allows for the measurement of parameters such as wavelength, intensity, and profile, among others. ![]() A spectrometer is an instrument used for spectral analysis of optical signals, enabling the determination of the spectral composition of emitted, absorbed, or scattered optical radiation by substances.
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