ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)
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Summaries of the issue

INFORMATION TECHNOLOGIES AND SYSTEMS

5
  An algorithm is proposed for formation of Gordon — Mills — Welch sequences, based on matrix representation of sequences with compound period. These sequences are formed over finite fields with double expansion.
AN ELECTRODYNAMIC MODEL OF THE NEAR-FIELD HIGH-FREQUENCY SOUNDING OF BIOLOGICAL OBJECTS Yury A. Baloshin, Mekhrengin Mikhail Viktorovich, Aleksey V. Arsenev, Anatoly A. Sorokin
10
  An electrodynamic model of high-frequency near-field probing of biological objects is presented. The study of sprout zones activity in teenagers is used as an example of the model application The information signal from a biological object is shown to depend not only on its dielectric permeability but also on the object conductivity.

DEVICES AND SYSTEMS OF AUTOMATIC CONTROL

16
  The problem of modal controller design is considered on the base of a criterion providing the optimal balance between quality management and robust properties of the system.
21
  The problem of attainability domain construction for autonomous underwater vehicle is considered. The proposed solution is based on the method of correction of parameters of the control structure formed with the use of Pontryagin's maximum principle. Results of digital modeling are presented, comparison with solution obtained with Krylov — Chernousko method is carried out.

ELECTRONIC AND ELECTROMAGNETIC DEVICES

SYNTHESIS OF DIGITAL FILTERS FOR GENERATOR TRANSFORMERS WITH INCREASED SENSITIVITY Victor V. Ivanov, Maxim V. Shakursky, Victor K. Shakursky
28
  The problem of digital self-oscillation system synthesis is considered. A solution to the problem based on the use of digital filters with tunable phase-frequency characteristic is presented.
ATTACHED MASSES ANALYSIS OF ELASTIC SENSITIVE ELEMENTS OF MERCURY REED SWITCHES Tkalich Vera L., Labkovskaya Rimma Ya., Pirozhnikova Olga I.
32
  The design features of mercury reed switches are performed and the factors affecting the value of the attached masses of elastic sensing elements are determined. An improved model of the attached mass of the elements is presented, analytical expression for the amplitude-frequency characteristic is derived.

OPTICAL AND OPTO-ELECTRONIC INSTRUMENTS AND SYSTEMS

36
  A lens is designed for chromatic selection of spectral components in image of polychromatic ring-shaped object, the color of the ring image being dependent on the front focal length value. Several recommendations for design of the systems under consideration are formulated.
EFFECTIVE EXCITATION OF POLARITONIC MODES IN OPTICAL CAVITY WITH RESONANT INVERSIONLESS MEDIUM Arkhipov Mikhail V, Arkhipov Rostislav M, Valentin S. Egorov, Igor A. Chekhonin, Mikhail A. Chekhonin, Sergey N Bagaev
42
  The properties and lifetimes of cavity modes in resonant inversionless medium are studied analytically and numerically in semi-classical local and distributed approximation. Increase in the modes lifetime in strongcoupling regime is demonstrated. New effective method of polariton laser pumping is proposed and investigated numerically. Numerical model of laser with narrowband absorber and broadband active medium is developed for ring cavity. Possibility of spectral condensation phenomena is demonstrated with numerical calculations.
48
  An example of modeling of total-reflection lens for high-power light diode is presented. The modeling process in Zemax program is demonstrated, the effects of the shape of internal and external surfaces of complex lens on the system characteristics is investigated.
A METHOD FOR AUTOMATIC COMPENSATION OF VIBRATIONS IN SHADOW DEVICE WITH THE USE OF OPTIMAL DISCRIMINATOR Lyubov A. Ivanova, Alla V. Meleshko, Vyacheslav V. Pyatkov, Vladimir A. Resovsky
52
  A statistical model of shadow instrument structure is presented. The model allows for compensation of noise vibration components with the use of a closed-loop system with negative feedback.
56
  An interference refractometer is used for realization of a new method for determination of composition and properties of chemical solutions in technological purification lines and in synthesis of chemicals of various classes is described. Advantages of the detector over existing devices are demonstrated.
STUDY OF METROLOGICAL CHARACTERISTICS OF A MEASURING OPTICALMECHANICAL HEAD Majorov Evgeniy E., Mashek Alexander Ch., Prokopenko Victor T., Nina Ya. Chistyakova
61
  Metrological characteristics of a measuring optical-mechanical head are analyzed. The measuring range for diffuse-reflecting surface shape measurement, output signal amplitude, and measurement errors are studied. Comparative analysis of the head and existing certified devises is carried out.

HEAT REGIMES AND RELIABILITY OF INSTRUMENTS AND SYSTEMS

MODELING OF THERMAL CONDITIONS AND THERMAL ABERRATIONS OF A SMALLSIZED SPACE TELESCOPE Yulia Bayova, Demin Anatoly V., Hankov Sergei I., Sergey I. Zhukov
68
  A method for calculation of thermal condition and heat-induced aberration of the electro-optical system for remote sensing of the Earth from a micro satellite is presented. Result of calculations demonstrates that the temperature increments of the telescope elements and the thermo-optical aberrations are proportional to the operational mode duration. The chosen thermo-mechanical scheme is shown to afford the telescope thermal stability during operation.

INSTRUMENT-MAKING TECHNOLOGY

IMPLEMENTATION OF VIRTUAL MODELING SYSTEMS FOR POLIMER COMPOSITE MATERIALS SELECTION AND DESIGN Yablochnikov Yevgeny I., Vladimir A. Braginsky, Aleksey S. Vosorkin
75
  The correct choice of composite material is considered to be the key problem in new product design. Application of computer technologies in the selection and design of polymer composite materials is analyzed. Implementation of computer-aided engineering system Moldex3D for injection molding process modeling is described.
STUDY OF RADIATION RESISTANCE OF DIELECTRIC COATING DEPOSITED ON OPTICAL SURFACE Gagarsky Sergey V., Ermolaev Vladimir S., Sergeev Andrey N, Mikhail V. Puzyk
80
  A method for laser induced damage (LID) threshold measurement both within volume of transparent dielectrics and at surface of high-energy laser optical components is proposed. The technique makes it possible to determine the optical breakdown statistics in a chosen area of optical element for single-shot exposure and for accumulation regime. A technique of additional chemical-mechanical surface polishing is proposed, the LID threshold for coatings of optical components with surfaces subjected to the additional processing is measured and compared with regular treatment.
STUDY OF OPTICAL PROPERTIES OF ACRYLIC HYDROGEL USED IN POLLUTANTS DISPLAY SYSTEMS Aleksey L. Itin, Лукин С. Б., Uspenskaya Maya Valerievna, Соловьев В. С.
85
  Results of investigations of optical properties of acrylic hydrogel used as a sensitive element in optoelectronic systems of pollutants display are presented. Spectral features and functions of the hydrogel refractive index variation under exposure to different pollutants are measured at various concentrations of polyvalent metals at room temperature.

BRIEF NOTES

LASER ACTIVE MEDIUM ON THE BASE OF BISMUTH-DOPED FLUORIDE GLASS ZBLAN Aleksey N. Romanov, Elena V. Haula, Zukhra T. Fattakhova, Alexander A. Veber , Vladimir N. Korchak, Vladimir B. Tsvetkov, Vladimir B. Sulimov
91
  Addition of bismuth fluoride BiF3 to ZBLAN fluoride glass with composition (53ZrF4—20BaF2—4LaF3—20NaF—3AlF3) is shown to lead to partial reduction of bismuth fluoride to luminescent subvalent bismuth compounds. The resulting glass is of high optical quality and demonstrates broadband luminescence in Near-IR (1000—1500 nm). The glass is reported to comprise a promising active media for broadband optical amplifiers and tunable lasers. The nature on near-infrared luminescent subvalent bismuth centers in ZBLAN glass is discussed.