Methods for Optimizing the Objects Detection Range by a Multi-Channel Optical-Electronic System

The paper describes the possibilities of increasing the objects detection range by a multichannel optoelectronic system, which can be done in two ways: by choosing a statistical criterion for making a decision and by a rational design of the receiving optical system. When analyzing ways to increase the quality of processing the signals received by the system through heterogeneous channels, we found several ways to improve the quality of decisions made: at the algorithmic, functional or design levels. In this study, we chose the methods of channel integration at the algorithmic and constructive levels. Since the problem of multi-alternative object detection by several spectral channels is being solved, the Bayesian criterion for the search quality of the minimum average risk was chosen at the algorithmic level as the most appropriate. The search for the minimum average risk was carried out according to the characteristics of the object type. The choice of this criterion when evaluating signals from two spectral ranges provided a gain in the detection range of about 10 %. At the design level, the function of the ratio of irradiance on channels, e.g. passive infrared and laser radar channels, is nonlinear. To ensure the same value of the increase in the detection range for each channel, it is necessary to redistribute the threshold sensitivity of the channels. We opted for a method of equalizing the ranges by changing the transmission coefficients of the channels. The alignment of the light-energy characteristics of the channels at the design level leads to a gain in the detection range of scanned objects by 5--7 %

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