Measuring unit for determining ultra-weak photon emission of specimen

摘要

The self emission is measured and/or an excited emission using an excitation source (1) and a photon measuring system. It addition to the excitation radiation source and the photon measuring system, also at least the optically essential components are enclosed. The measurement of the excited emission is arranged at a time after a terminated excitation period, and with the measurement of the own emission from the specimen (6), the excitation radiation source remains in the switched off position. The photon measuring system designed as a photo multiplier (12), a radiation outlet plane and a photo cathode (14), belong to the essentially effective optical components of the excitation radiation system.