DOI: 10.17586/2226-1494-2016-16-5-757-763


EXPERIMENTAL STUDIES OF ERROR COMPENSATION FOR OPTICAL SIGNAL COORDINATE DETERMINATION BY DOUBLE SYNTHESIZED APERTURE

A. G. Obolenskov, S. M. Latyev, B. G. Podlaskin, E. G. Guk


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For citation: Obolenskov A.G., Latyev S.M., Podlaskin B.G., Guk E.G. Experimental studies of error compensation for optical signal coordinate determination by double synthesized aperture. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2016, vol. 16, no. 5, pp. 757–763. doi: 10.17586/2226-1494-2016-16-5-757-763

Abstract

Subject of Research.The paper presents theoretical and experimental analysis of dependence of the determination error of a modulated optical signal under intense background illumination on the value of mutual shift of two current-voltage characteristics if using a double synthesized aperture on multiscan position-sensitive detector. Method. The studies have been carried out on a specially designed setup, that allows scanning photosensitive area of multiscan position-sensitive detector by an optical beam that imitates intense solar illumination. At the same time the position error of determination of weak modulated optical signal coordinate is measured at different relative position of signal and background illumination, and background power. Main Results.Experimental studies have confirmed the theoretical conclusions. It is shown that the use of double synthesized aperture of multiscan position-sensitive detector with the voltage shift of the current-voltage characteristics equal to 0.4 V enables to reduce position determination error of a weak modulated signal by an order of magnitude. Practical Relevance.Research results have opened the opportunity of accuracy increase for position-sensitive systems operating under background illuminations exceeding the level of information optical signal.


Keywords: position-sensitive detector, synthesized aperture, background illumination

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