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Avtometriya

2019 year, number 1

1.
MATHEMATICAL APPARATUS FOR CALCULATIMG THE MICROSTRUCTURE OF A HARMONIC KINOFORM LENS

A. I. Antonov, G. I. Greisukh, E. G. Ezhov, E. A. Ryzhova
Penza State University of Architecture and Construction, ul. Germana Titova 28, Penza, 440028
Keywords: гармоническая киноформная линза, гармоническая зона Френеля, пилообразная рельефно-фазовая микроструктура, условие таутохронности, продольный хроматизм, harmonic kinoform lens, harmonic Fresnel zone, tautochronism, longitudinal chromatism

Abstract >>
The paper presents a mathematical apparatus based on the requirement of preserving tautochronism in each of the diffraction orders of a harmonic kinoform lens. The apparatus was used as the basis of a method for calculating the lens microstructure.яThe method limits the relative longitudinal chromatism of the lens to a given level and provides the initial parameters necessary for the radial calculation and optimization of the optical system with a harmonic kinoform lens using well-known commercial optical design computer programs
																								



2.
ELLIPSOMETRIC METHOD OF SUBSTRATE TEMPERATURE MEASUREMENT IN LOW-TEMPERATURE PROCESSES OF EPITAXY OF INSB LAYERS

V. A. Shvets1,2, I. A. Azarov1, S. V. Rykhlitskii1, A. I. Toropov1
1Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, prosp. Akademika Lavrent'eva, 13
2Novosibirsk State University, 630090, Novosibirsk, ul. Pirogova, 2
Keywords: антимонид индия, эллипсометрия, температура поверхности, in situ, термометрия, критические точки, indium antimonide, ellipsometry, surface temperature, in situ thermometry, critical points

Abstract >>
The present study is aimed at solving the problem of in situ thermometry of low-temperature processes of molecular beam epitaxy of indium antimonide. A spectral ellipsometric method for measuring the temperature of InSb epitaxial layers is proposed. The method is based on the temperature dependence of the energy positions of the critical points. The spectra of ellipsometric parameters of the material in the temperature range from 25 to 270o are measured. The analysis of these spectra shows that the most temperature-sensitive parameters are the spectral positions of the peaks of the ellipsometric parameter Ψ, which are manifested near the critical points E1 and E1 + Δ1. It is found that the dependences of the peak positions on temperature in the above-mentioned temperature range are linear functions with the slope factors of 0.21 and 0.10 nm/o, respectively. These factors determine the sensitivity of the method and ensure the temperature measurement accuracy within 2-3o
																								



3.
OPTICAL HILBERT DIAGNOSTICS OF HYDROGEN JET BURNING

Yu. N. Dubnishchev1,2, V. A. Arbuzov1,3, V. V. Lukashov1, K. A. Sharov1, V. V. Lemanov1
1Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, prosp. Akademika Lavrent'eva, 1
2Novosibirsk State Technical University, 630073, Novosibirsk, prosp. K. Marksa, 20
3Technological Design Institute of Scientific Instrument Engineering, Siberian Branch, Russian Academy of Sciences, 630058, Novosibirsk, ul. Russkaya, 41
Keywords: оптическая диагностика потоков, струйное пламя, контроль горения, вихревые структуры, optical diagnostics of flows, jet flame, burning control, vortex structures

Abstract >>
Diffusion burning of a hydrogen jet is studied by methods of the Hilbert optics. A diagnostic system based on the batch-produced IAB-463M device is implemented, which includes a specially developed Hilbert filtration module coupled with a light source. The influence of local turbulent perturbations (puff or slug) arising in the tube forming the jet on the dynamic structure and flame evolution is revealed. This phenomenon can be used to control the space-time structure of the flame
																								



4.
INVESTIGATION OF CHARACTERISTICS OF THICK DIFFRACTION GRATINGS BY THE METHOD OF LASER HETERODYNE TOMOGRAPHY

P. E. Tverdokhleb, Yu. A. Shchepetkin, I. Sh. Steinberg
Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, prosp. Akademika Koptyuga, 1
Keywords: лазерная гетеродинная томография, амплитудно-фазовая дифракционная решётка, коллинеарный гетеродинный фотодетектор, акустооптическое сканирование решётки, дифракционная эффективность, амплитудная и фазовая составляющие решётки, laser heterodyne tomography, amplitude-phase diffraction grating, collinear heterodyne photodetector, acousto-optical scanning of the grating, diffraction efficiency, amplitude and phase components of the grating

Abstract >>
A procedure of layer-by-layer investigations of characteristics of thick amplitude-phase gratings by the method of laser heterodyne tomography is presented. The parameters of a thick grating nonlinearly written on an additively colored crystal of calcium fluoride (CaF2:Na) are estimated. The main theoretical postulates of laser heterodyne tomography are experimentally validated
																								



5.
EFFECT OF PHOTORESPONSE NONLINEARITY ON THE DIFFRACTION EFFICIENCY OF HOLOGRAMS

S. A. Shoydin
Siberian State University of Geosystems and Technologies, ul. Plakhotnogo 10, Novosibirsk, 630108
Keywords: голография, дифракционная эффективность, формфактор, видность, степень когерентности, гауссов пучок, holography, diffraction efficiency, form factor, visibility, degree of coherence, Gaussian beam

Abstract >>
The effect of the photoresponse nonlinearity of a holographic material on the achievable diffraction efficiency of holograms has been studied.яIt has been shown that the interaction between the hologram form factor and the photoresponse nonlinearity leads to an increase in diffraction efficiency in comparison with a linear photoresponse. Numerical calculations for the photoresponse nonlinearity corresponding to Reoxan phase holographic material are presented
																								



6.
CALCULATION OF LIGHT SCATTERING ON A BRAGG GRATING USING RECURSION OF TRANSFER MATRICES ON A NONUNIFORM GRID

N. I. Gorbenko1,2, V. P. Il'in1,2, L. L. Frumin2,3
1Institute of Computational Mathematics and Mathematical Geophysics, Siberian Branch, Russian Academy of Sciences, prosp. Akademika Lavrent'eva 6, Novosibirsk, 630090
2Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090
3Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, prosp. Akademika Koptyuga 1, Novosibirsk, 630090
Keywords: волоконная брэгговская решётка, задача рассеяния, метод трансфер- матриц, рекуррентный алгоритм, неравномерная сетка, fiber Bragg grating, scattering problem, transfer matrix method, recurrent algorithm, nonuniform grid

Abstract >>
The direct problem of light scattering for a fiber optic Bragg grating is considered.яThe formulation and solution of the problem based on the transfer matrix method are discussed.яA variant of the method is proposed which reduces to a a universal recurrent algorithm similar to the sweep algorithm and convenient for computing.яThe elements of transfer matrices were calculated with the third local order of accuracy on an uneven computational grid along the coordinate in the approximation of coupled modes using the finite volume method.яThe recurrent algorithm was used in numerical calculations for the direct scattering problem for a Bragg grating with apodization and nonlinear chirp.яNumerical simulations confirmed the significant increase in the accuracy of calculations for solving the scattering problem on the nonuniform grid
																								



7.
POLARIZATION TRANSFORMATION BY CONVERSION OF TM0-TE1 MODES IN AN ION-EXCHANGE GLASS WAVEGUIDE

M. M. Vekshin, N. A. Yakovenko
Kuban State University, ul. Stavropol'skaya 149, Krasnodar, 350040
Keywords: интегральная оптика, поляризация оптического излучения, волноводная мода, integrated optics, polarization of optical radiation, waveguide mode

Abstract >>
The mode composition of a four-layer optical waveguide consisting of an ion exchange channel waveguide in glass coated with a highly refractive nanoscale dielectric film has been studied.яIt has been found that varying the geometric dimensions of the film changes the polarization states of the second and third waveguide modes: the TM0 mode is transformed into the TE1 mode, and the TE1 mode becomes the TM0 mode.яBased on this, a new method of constructing a waveguide polarization converter has been proposed and experimentally confirmed
																								



8.
TERAHERTZ IMAGER BASED ON A THZ-TO-IR CONVERTER

A. G. Paulish1,2, B. N. Novgorodov1, S. V. Khryashchev1, S. A. Kuznetsov1,3
1Design and Technology Institute of Applied Microelectronics, prosp. Akademika Lavrent'eva 2/1, Novosibirsk, 630090
2Novosibirsk State Technical University, prosp. K. Marksa 20, Novosibirsk, 630073
3Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090
Keywords: терагерцовое излучение, детекторы терагерцового изображения, конверсия ТГц, ИК, обработка изображения, terahertz radiation, terahertz image detectors, THz-to-IR conversion, image processing

Abstract >>
A new terahertz (THz) imager based on THz-to-IR conversion has been proposed and studied.яThe THz-to-IR converter consists of an ultra-thin resonant THz absorber (meta-absorber) whose backside is coated with an emission layer with an emission coefficient close to unity. The absorption of THz radiation causes heating of the converter, which was recorded with an infrared camera from side of the the emission layer.яThe small thickness of the converter (more than 50 times shorter than the working wavelength of THz radiation) determines its low heat capacity, resulting in an increase in the sensitivity and speed of the visualizer.яOptimization of the optics of the THz visualizer, making cuts in the converter structure to Reduce the blooming and increase the response, and the IR image processing method, which increases the signal-to-noise ratio, provide an increased sensitivity of the THz imager at the level of sensitivity of thermal detectors in the 8-12 $\mu$m IR range
																								



9.
ALGORITHMS OF INTERPOLATION OF QUADRATURE SIGNALS FOR HIGH-RESOLUTION TRANSDUCERS OF LINEAR AND ANGULAR DISPLACEMENTS

A. V. Kiryanov, V. P. Kiryanov, V. V. Chukanov
Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, prosp. Akademika Koptyuga, 1
Keywords: алгоритмы интерполяции, интерфейсные блоки, фотоэлектрические угловые преобразователи, фотоэлектрические линейные преобразователи, абсолютные и инкрементные преобразователи, interpolation algorithms, interface blocks, photoelectric angular transducers, photoelectric linear transducers, absolute and incremental transducers

Abstract >>
Capabilities of some algorithms of interpolation of quadrature signals currently used for creating parallel-type interface blocks for high-resolution transducers of linear and angular displacements are analyzed
																								



10.
DETECTION OF MOVING OBJECTS BY A PASSIVE SCANNING SYSTEM

V. K. Klochko
Ryazan State Radio Engineering University, 390005, Ryazan, ul. Gagarina, 59/1
Keywords: пассивная система, сканирование, движущиеся объекты, сопряжён- ные векторы, оценки координат, обнаружение объектов, passive system, scanning, moving objects, conjugate vectors, coordinate estimation, object detection

Abstract >>
The problem of detection and estimation of spatial coordinates of moving objects by a passive scanning system of vision is solved. Algebraic and algorithmic approaches to determining the spatial coordinates and parameters of object motion are proposed. These approaches differ by taking into account the object velocities in searching for conjugate vectors of directions to the objects. The algorithms developed on the basis of these approaches show that the approach with allowance for motion parameters offers significant advantages of higher accuracy of coordinate estimation and higher probability of detecting all objects
																								



11.
NONLINEAR ESTIMATION OF SIGNAL PARAMETERS UNDER THE INFLUENCE OF NARROW-BAND NON-GAUSSIAN NOISE

V. M. Artyushenko1, V. I. Volovach2
1Technological University, ul. Gagarina 42, Korolev, 141070, Moscow region
2Volga State University of Service, ul. Gagarina 4, Tolyatti, 445017
Keywords: блок нелинейного преобразования, многоканальный дискриминатор, величина расстройки между измеряемыми параметрами, обобщённая среднеквадратическая ошибка, отношение сигнал/помеха, nonlinear transformation unit, multichannel discriminator, detuning between the measured parameters, generalized rms error, signal-to-noise ratio

Abstract >>
The processing of information signal parameters under conditions of inertialess nonlinear transformation of an input mixture of signals and narrow-band non-Gaussian interference Considered.яThe nonlinear processing of signal parameters is analyzed in the ranges of small and arbitrary detuning between the measured signal parameters and their estimates, as well as at a random signal-to-noise ratio at the gauge input.яTwo variants of optimization of a multichannel discriminator by the criterion of the minimum of the generalized rms error and their corresponding structural schemes were obtained.яThe vector of optimal amplitude characteristics of the nonlinear transformation unit.яIt is shown that the discrimination and fluctuation characteristics of the discriminator are given by the average error signal and its dispersion
																								



12.
INTEGRAL OPERATOR FOR BORDER CONTRASTING OF TWO-DIMENSIONAL IMAGES FORMED BY AN OPTIC-ELECTRONIC DEVICE

A. N. Katulev, A. A. Khramichev
Scientific Research Center of the Central Scientific Research Institute of Aerospace Forces of the Ministry of Defense of the Russian Federation, 170026, Tver, Naberezhnaya Afanasiya Nikitina, 32
Keywords: интегральный оператор дифференцирования, изображение, оптико- электронный прибор, контраст, integral differentiation operator, image, optic-electronic device, contrast

Abstract >>
Mathematical bases of an integral operator for differentiating 2D images in order to increase their contrast are presented. Images are formed by an optic-electronic device under different background conditions. It is proven that the operator suppresses high-frequency components of images, generated by an applicative background and additive noise of the device. The universal property of the operator is determined, from which the known key differentiation operators are derived: gradient, Roberts, and Laplace operators. The results of contrasting real images by the proposed operator are presented
																								



13.
DYNAMIC OBJECT IDENTIFICATION USING A FAMILY OF EXPERIMENTAL SUPPORTING INTEGRAL CURVES

Yu. G. Bulychev1, A. G. Kondrashov2, P. Yu. Radu3
1JSC "All-Russian Scientific Institute 'Gradient'", 344000, Rostov-on-Don, prosp. Sokolova, 96
2JSC "Scientific Production Association 'Kvant'", 173001, Velikiy Novgorod, Bolshaya Sankt-Peterbugskaya, 73
3JSC "Kaluga Research Radio Engineering Institute", 249192, Zhukov, Kaluzhskaya oblast, Lenina, ul. Lenina, 2
Keywords: динамический объект, активная идентификация, сингулярная по- меха, семейство опорных интегральных кривых, метод множителей Лагранжа, числовые характеристики поведения динамического объекта, dynamic object, active identification, singular interference, supporting integral curves, Lagrange multiplier method, quantitative characters of the dynamic object behavior

Abstract >>
A specifically planned experiment based on obtaining a required family of estimates of supporting integral curves (approximately described in a given finite system of base functions) is used to solve a problem of active identification of a dynamic object, which corresponds to an a priori unknown differential equation. In view of the fact that experimental data may contain fluctuation and singular interference, a method is developed for optimal unbiased estimation of linear numerical characteristics of the object behavior and approximate analytical solution (differential equation), which is valid for a given set of permitted time values and initial condition. The basic characteristics of the method are substantiated, and the results of the computational experiment are presented
																								



14.
MODERN GROUND-BASED SOLAR TELESCOPES AND REQUIREMENTS FOR THEIR AUTOMATION SYSTEMS

A. A. Lubkov, Yu. A. Popov
Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, prosp. Akademika Koptyuga, 1
Keywords: автоматизированная система управления солнечным телескопом и обсерваторией, активная и адаптивная оптика, контроллер, automated system for controlling a solar telescope and observatory, active and adaptive optics, controller

Abstract >>
This paper systematizes and generalizes data on the specific features, operation modes, and technical characteristics of world-class ground-based solar telescopes in order to obtain information required to develop and design an automated control systems for the large solar telescope included in the National Heliogeophysical Complex of the Russian Academy of Sciences