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Application of spatial correlation processing optical signals in the equipment of the control of security the speech information from outflow on the optical-electronic channel


V. B. Avdeev, V. D. Mochalin

On the basis of the analysis of features of one of types of transformation of angular fluctuations of an optical beam in an electric signal it is shown, that in mathematical sense it represents spatial correlation processing optical radiation by an entrance pupil of a photodetector. The mathematical model of the optical-electronic converter of correlation type for the round form of an entrance pupil of a photodetector and area of its light exposure is developed by an optical beam. The ratio of their sizes and the mutual position, transformations providing the maximal factor is proved. The experimental modelling the optical-electronic converter which has confirmed an opportunity of investigation of the information with window panes at a level of a speech signal 70 dB is carried out

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