INFORMATION AND MEASUREMENT SYSTEM BASED ON LASER OPTOELECTRONIC DEVICES WITH AN EXTENDED PERIOD OF UNAMBIGUITY 

Samohina Kristina Sergeevna, assistant, sub-department of instrument making, Penza State University (40 Krasnayа street, Penza, Russia), E-mail: priborostroenie@bk.ru 

681.586.32 

10.21685/2307-5538-2020-3-6 

Background. The purpose of the research is to analyze the possibilities of using information and measurement systems based on laser optoelectronic devices with an extended period of unambiguity for measuring physical quantities.
Materials and methods. Applied methods of mathematical analysis; mathematical modeling; mathematical physics; methods and means of laser interferometry; acousto-optics, spatial filtration; photoelectric transformations, including optical heterodination; precision linear measurements; computer technology.
Results. The scheme of information and measurement systems based on laser optoelectronic devices with an extended period of unambiguity for measuring physical quantities is considered. The analysis of this variant of the scheme used to measure linear quantities. The proposed method allows measuring the movement of moving objects in absolute mode.
Conclusions. The spatial position of a point located on the measurement path is found by the absolute value of the phase difference of two optical beams of the "0" and "+1" diffraction orders. Based on the calculations, it is concluded that the period of unambiguity of the optical scheme of an information and measurement system based on optoelectronic devices with an absolute measurement reading varies from 105 to 45 mm when the excitation frequency in the acoustooptical modulator changes in the range from 6 to 9 MHz. 

optical-electronic device, laser radiation, information-measuring system, period of unambiguity, phase of an electric signal