Design of the resolution simulation measurement setup for range-gated imaging system

The range-gated imaging system combined the technologies of pulsed laser illuminating and range-gated ICCD. To measure and evaluate the resolution of range-gated imaging system under certain atmosphere conditions, a simulating measurement setup was designed. Based on the radiation transmission theory, a model of optical backscatter and signal of atmosphere range-gated imaging system was given. The model gave photo-cathode irradiance produced by optical backscatter and signal varying with time. Two light sources were used for simulating the signal and backscatter light respectively. Based on the method of equivalent irradiance on photo-cathode, the methods of power determination for simulating light sources are provided. In the case of image intensifier using S-20 photo-cathode coupled with CCD, the power of simulating light sources were calculated.