Photoelectric characterictics of multi-elements IR FPA in registering point radiation sources
Results of calculations of photoelectric characteristics of infrared focal-plane-array (IR FPA) detectors for point sources of radiation are reported. The analysis is based on the Monte Carlo simulation of the diffusion process of photogenerated charge carriers in cadmium-mercury-tellurium based FPAs. The main photoelectric and design parameters of the photodetector and optical system were taken into account. The obtained results make it possible to formulate some requirements for design and photoelectric parameters of photosensitive elements ensuring an optimum sensitivity and spatial resolution of photodetectors under conditions of their uniform illumination and illumination with an optical spot from a point source of radiation.