Detection system for fast acquisition of spectra. It consists of a 'polychromator' fitted with a detector that enables spatial resolution, e.g., a 'vidicon tube', a 'charge-coupled device' or a 'silicon photodiode array'.
Source:
PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 378 (https://doi.org/10.1351/pac200779030293)