D2B (double monochromator)

A D2B, or double monochromator, is an optical device used to filter light by selecting specific wavelengths. It consists of two monochromators, which are instruments that isolate different colors of light. By passing light through two separate filters, a D2B reduces unwanted stray light and enhances the precision of measurements in experiments, such as those in spectroscopy. This allows scientists to focus on specific wavelengths, improving the analysis of materials by providing clearer and more accurate data about their properties and compositions.