Fourier Transform Spectrometers (FTS) are analytical instruments that measure the spectral properties of light or other electromagnetic radiation by collecting an interferogram and mathematically converting it into a spectrum using Fourier transform techniques. They offer high resolution, sensitivity, and speed, making them ideal for studying molecular vibrations, gas compositions, and material properties. FTS is widely used in infrared (FTIR) and near-infrared (NIR) spectroscopy for applications in chemistry, environmental monitoring, pharmaceuticals, materials science, and industrial process control. These spectrometers enable precise qualitative and quantitative analysis, including identification of chemical bonds, functional groups, and trace components.