DUAL BEAM ACOUSTO-OPTIC TUNABLE SPECTROMETER

摘要

An acousto-optically tunable double-beam spectrometer comprises a radiation source (102), an acousto-optically tunable filter (114) and a drive device for the filter having a predetermined frequency. The filter is double refractive and splits incident radiation into first (TE) and second (TO) radiations of different directions and of a given frequency and a radiation (NT) of a different frequency. The spectrometer also comprises devices for concentrating the first radiation in order to analyse a sample and devices for concentrating the second radiation, which is used as a reference