Fourier Transform Spectrometers (FTS) are advanced analytical instruments that measure the spectral properties of light by collecting an interferogram and converting it into a spectrum using Fourier transform. They provide high-resolution, accurate analysis of molecular composition, chemical bonds, and material structure. Widely used in chemistry, physics, environmental monitoring, and materials science, FTS instruments offer rapid, sensitive, and non-destructive analysis across a broad range of wavelengths.