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Article title THE ANALYSIS OF THE INTERFERENCE SIGNAL COHERENT-LIMITED CONTROL SYSTEMS NONSMOOTH SURFACES
Authors E. E. Maiorov, A. C. Mashek, G. A. Tsygankova, V. K. Abramyan, G. G. Khaidarov, A. G. Khaidarov, A. A. Konstantinova
Section SECTION IV. RADIO ENGINEERING AND ACOUSTICS
Month, Year 02, 2018 @en
Index UDC 681.23: 681.787.7
DOI 10.23683/2311-3103-2018-2-221-233
Abstract In the paper, the sloping drop of the illuminating beam on the surface of the object and the determined selection criterion the length of the individual zones throughout the depth of the scene analysis output interference signal is considered. The simulation process of the formation of the envelope of the interference signal, and a hypothetical model of the sources of individual speckles to eliminate the decor¬relation of speckle-fields are proposed. The interference equation, and two ap-proaches to the analysis of the envelope of the interference output signal: the method of areas and the method of differentiation of the envelope are analyzed. A graphic image of the envelope depending on the displacement of the reference mirror and the resulting formula the dependence of the measurement error of the nonsmooth surface from the depths of the scene when the signal processing by the criterion of equality of the areas bounded signal envelope are discussed. The problem of estimating meas¬urement errors by the method of differentiation of the envelope signal, which was tied to a specific maximum deformable envelope of the interference signal is solved. The dependences of the mean square error of measurements of the scene depth by the method of squares and the method of differentiation of the envelope of the interfer¬ence output signal are received. The deformation of the envelope signal occurs the ambiguity in determining the point of zero path difference is shown. For this case two criteria of decision-making and appropriate methods of processing the output signal: the method of areas and the method of differentiation of the envelope are proposed. For each of the methods specified measurement errors and the appropriate depend-encies are calculated.

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Keywords Interference; speckle; focusing lens; diffraction limit; method of squares; method of differentiation.
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