New “large area” trap detectors based on silicon photodiodes of (18 × 18) mm2 have been characterized to be used as standards for measuring the spectral responsivity of detectors. The study of these detectors was carried out on the experimental set-up of the laboratory based on a monochromator and sources of continuous spectral radiation. This article describes the developed trap detectors, details the method of measuring their relative spectral responsivity and presents the method used to change the relative spectral responsivity into the absolute spectral responsivity.

Key words

trap detector
spectral responsivity