Photonics is increasingly influencing our lives, even if many people do not realize it. For example, fields such as semiconductor, chemical, food and color analysis; light source and pollution measurement; medical diagnostics; and telecommunications use monochromators or spectrographs during their processing, certification or regulatory testing. Nonexpert users can find it difficult to compare different monochromator systems to choose the most suitable spectroscopic configuration for an application. They often misunderstand specifications such as dispersion, precision, image quality and stray light...