I have several spectrographs that work in the visible range. The most sophisticated is the one used for astronomical redshift measurements shown at right. It is a typical Cerzy-Turner design which uses a single order grating to image the spectrum on the CCD camera. The spectrum shown below covers only 100 angstroms which indicates the high resolution nature of this instrument. This spectrograph is capable of measuring changes in the spectrums position of 1 millionth of an inch. In order to do this all the components are mounted on granite and enclosed in a temperature stabilized box. For in depth info see www.spectrashift.com.