ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)

vol 67 / April, 2024

DOI 10.17586/0021-3454-2016-59-5-388-394

UDC 681.23: 681.787.7


V. T. Prokopenko
ITMO University, Saint Petersburg, 197101, Russian Federation; Professor

E. E. Majorov
Saint-Petersburg state university of aerospace instrumentation; Associate professor

A. C. Mashek
Budyonny Military Academy of Communications, Department of Physics and Mathematics, St. Petersburg; Senior Lecturer

S. V. Udakhina
Saint Petersburg Academic University, Department of Information Technologies and Mathematics; PhD, Associate Professor

G. A. Tsygankova
Naval Polytechnic Institute, Department of Physics; PhD

A. G. Khaidarov
St. Petersburg State Technological Institute (Technical University), Department of Business Informatics; Associate Professor

T. A. Chernyak
St. Petersburg State University of Civil Aviation, Department of Higher Mathematics; Head of the Department

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Abstract. An optical-electronic instrument operating in scanning and trigger modes is developed on the base of Michelson interferometer. Analysis of a complex-shape surface is carried out; random modulations of interference signal and measurement errors caused by variation of optical path length of object beam at tangential movement of the object are studied. A method is proposed for minimization of the effect of speckle-modulation of interference signal by increasing the number of independent measurements during one pass of optical measuring head and subsequent averaging. The method realization employs an additional modulation of optical path length difference. Experimental results obtained with the instrument make it possible to determine the measurement discreteness and the limit of allowable speed of diffusereflecting object movement during the dynamic measurements.
Keywords: speckle-modulation, referent mirror, diffuse reflecting object, optical measuring head, trigger mode, scanning mode, Michelson interferometer

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