Monochromators and spectrographs are scientific instruments used to separate and measure the individual components of light, often within a narrow wavelength range. Monochromators use a single wavelength of light, while spectrographs use multiple wavelengths, to create a spectral output. These instruments are widely used in various applications such as fluorescence, Raman spectroscopy, absorption spectroscopy, and more. Customized monochromators and spectrographs can be designed to meet the specific requirements of a particular application.