Adaptive correction of phase distortion in а system with optical control
Adaptive correction of phase distortion in а system with optical control
М.А. Vorontsov, V.Yu. Ivanov, and А.N. Маtvееv
An adaptive system with optical control, using а nonlinear- optics phase analyzer, is discussed. The method of correction is shown to bе effective for both static and dynamic phase distortions.
Show AbstractSolution of the inverse problem of optimization of the phase characteristic of а dielectric deflector with electrooptic control
Solution of the inverse problem of optimization of the phase characteristic of а dielectric deflector with electrooptic control
N.Е. Shapkina
А method of improving the phase characteristics of а dielectric de flector with electrooptic control (the control electrodes are in the form of а bazed grating) is discussed. It is based on the solution of the inverse problem of correction of а traditional echelette.
Show AbstractApproximate analytic solution of the equations of collinear acoustooptic diffraction
Approximate analytic solution of the equations of collinear acoustooptic diffraction
V.G. Zakharov and V.N. Parygin
An approximate analytic solution is found for the equations of collinear acoustooptic diffraction with allowance for the divergence of the acoustic beam when the diameter of the piezoelectric transducer is of the order of а few millimeters.
Show AbstractThermoelastic generation of acoustic waves during nonlinear diffusion of photoexcited electron- hole plasma
Thermoelastic generation of acoustic waves during nonlinear diffusion of photoexcited electron- hole plasma
V.Е. Gusev
The possibility of optoacoustic determination of the diffusion length of nonequilibrium electron-hole plasma in а semiconductor is investigated.
Show AbstractEffect of multiple scattering in diffraction tomography: the T- matrix approach
Effect of multiple scattering in diffraction tomography: the T- matrix approach
V.А. Burov, М.N. Rychagov, and А.V. Saskovets
An algorithm is developed for re constructing а refraction inhomogeneity from tomographic data, taking into account multiple scattering. The method relies on an iteration procedure applied to the Lippmann-Schwinger equation for the T-matrices. Problems associated with the interpolation of data in Fourier space are discussed.
Show AbstractVortex structure and energy balance in mean motion in а channel with smooth walls
Vortex structure and energy balance in mean motion in а channel with smooth walls
V.Р. Petrov, V.I. Sugrei, and Yu.L. Shchev'ev
Experimental data are used as а basis for an analysis of the reasons for the loss of energy balance at а point. Regions in which turbulent energy is transformed from one form to another are identified and the dimensions of energy- bearing vortices in the flow are determined.
Show AbstractА study of mechanisms responsible for the polarization of liquid dielectrics in the electric field between conducting electrodes
А study of mechanisms responsible for the polarization of liquid dielectrics in the electric field between conducting electrodes
А.А. Belov, А.А. Usanov, and М.V. Shchetinin
The example of n - heptane is used to investigate the polarization of liquid dielectrics in the electric field between conducting electrodes. Polarization mechanisms with time constants in the range between 1 and $2\cdot 10^4$ sec were investigated.
Show AbstractHyperfine fields in $Gd(Fe_{1-x}M_x)_2$
Hyperfine fields in $Gd(Fe_{1-x}M_x)_2$
А.К. Kupriyanov
It is shown that the "induced" fields acting on Gd are due to both the polarization of conduction electrons and additional exchange polarization of the atomic core of the ion of the rare earth metal. The latter is the result of the exchange interaction between the sublattices.
Show AbstractThe properties of martensitic transformations of NiTi-V alloys as functions of aging
The properties of martensitic transformations of NiTi-V alloys as functions of aging
А.G. Khundzhua, М.I. Zakharova, and G.N. Коkoev
X- Ray structure analysis of single-crystal samples were used to investigate martensitic transformations in NiTi-V alloys in the hardened state and after isothermal tempering at 623 К.
Show AbstractAnalytic model of polydisperse back-scattering coeffic ient for problems in the laser diagnostics of the atmospheric aerosol
Analytic model of polydisperse back-scattering coeffic ient for problems in the laser diagnostics of the atmospheric aerosol
V.L. Boichenko, Т.В. Razumikhina, V.I. Rozhdestvenskaya, and А.I. Kholodnykh
An approximate analytic expression is reported for the polydisperse back- scattering coefficient, obtained bу approximating the exact Mie back- scattering pattern, taking into account actual particle - size distribution functions.
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