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Conferences, exhibition & seminars
N.Istomina
Laser profile exhibition "Metalworking-2016" Overview of Laser Technologies and tools presented in the exhibition "Metalworking –2016".
Laser profile exhibition "Metalworking-2016" Overview of Laser Technologies and tools presented in the exhibition "Metalworking –2016".
Additive Technologies
M.Khomenko, V.Niziev, F.Mirzade
Investigation of the effect of the dissolved substance on the recrystallization of the clad deposit during the laser fusion of the heat-resistant nickel alloy powders The quality and microstructural properties of the clad deposits during the laser cladding depend on several operating parameters of the laser fusion (LF) process of the heat-resistant powders. Selection of parameters based on the study of the microstructure evolution by analyzing the experimental cladding is difficult. We have proposed the numerical model of recrystallization of the clad deposit during the laser fusion with coaxial supply of the heat-resistant nickel-based alloy powders. We have demonstrated the influence of adjoint heat transfer processes, kinetics of crystallization and diffusion of the dissolved matter on the microstructural properties of the deposited bead. The model is based on the use of the surface mechanism of the crystal phase growth.
Investigation of the effect of the dissolved substance on the recrystallization of the clad deposit during the laser fusion of the heat-resistant nickel alloy powders The quality and microstructural properties of the clad deposits during the laser cladding depend on several operating parameters of the laser fusion (LF) process of the heat-resistant powders. Selection of parameters based on the study of the microstructure evolution by analyzing the experimental cladding is difficult. We have proposed the numerical model of recrystallization of the clad deposit during the laser fusion with coaxial supply of the heat-resistant nickel-based alloy powders. We have demonstrated the influence of adjoint heat transfer processes, kinetics of crystallization and diffusion of the dissolved matter on the microstructural properties of the deposited bead. The model is based on the use of the surface mechanism of the crystal phase growth.
Tags: heat-resistant powders laser cladding laser fusion жаропрочные порошки лазерная наплавка лазерное сплавление
Optical Devices & Systems
Yu.Yurchuk
Optical Isolators An optical isolator is an optical component which allows the transmission of light in only one direction. It is typically used to prevent unwanted feedback into an optical oscillator, such as a laser cavity. The operation of the device depends on the Faraday effect, which is used in the main component, the Faraday rotator.
Optical Isolators An optical isolator is an optical component which allows the transmission of light in only one direction. It is typically used to prevent unwanted feedback into an optical oscillator, such as a laser cavity. The operation of the device depends on the Faraday effect, which is used in the main component, the Faraday rotator.
A. Lukin, A.Melnikov, A.Skochilov
Measurement of Convergent Mirror of Millimetron Telescope Using Computer-Generated Hologram Space observatory of millimeter and IR wavelength ranges with cryogenic telescope "Millimetron" ("Spektr-M") with the diameter of 10 m is planned for launch after 2019. Operating range of the telescope is 20 μm to 17 mm. The production technology of its elements is being developed. In the article it is suggested to measure the shape of convex hyperbolic surface of convergent mirror of Millimetron telescope under the conditions of shop floor in the process of shaping and at cryogenic temperatures in the layout of unequal-arm laser interferometer of Twyman-Green type and use computer-generated hologram executed on plane-convex Zerodur blank in the capacity of optical compensator.
Measurement of Convergent Mirror of Millimetron Telescope Using Computer-Generated Hologram Space observatory of millimeter and IR wavelength ranges with cryogenic telescope "Millimetron" ("Spektr-M") with the diameter of 10 m is planned for launch after 2019. Operating range of the telescope is 20 μm to 17 mm. The production technology of its elements is being developed. In the article it is suggested to measure the shape of convex hyperbolic surface of convergent mirror of Millimetron telescope under the conditions of shop floor in the process of shaping and at cryogenic temperatures in the layout of unequal-arm laser interferometer of Twyman-Green type and use computer-generated hologram executed on plane-convex Zerodur blank in the capacity of optical compensator.
Tags: circular ruling engine computer-generated hologram diffraction structure zerodur дифракционная структура круговая делительная машина синтезированная голограмма церодур
A. Akentyev, A.Sokolov
Small-size retroreflectory system for Lomonosov spacecraft The construction of small-size retroreflectory system with submillimeter target error for low-orbit satellites, including Lomonosov spacecraft, is suggested. The factors, which influence on the energy and precision characteristics of small-size retroreflectory system, are determined.
Small-size retroreflectory system for Lomonosov spacecraft The construction of small-size retroreflectory system with submillimeter target error for low-orbit satellites, including Lomonosov spacecraft, is suggested. The factors, which influence on the energy and precision characteristics of small-size retroreflectory system, are determined.
Tags: corner-cube-reflectors small-size retroreflectory system малогабаритная ретрорефлекторная система уголковые отражатели
Optical Measurements
A.Magunov, B.Lapshinov
Experimental determination of temperature dependence of refractive index of semiconductor materials The experimental results of determination of temperature dependence of refractive index n (T) of a number of wide-band semiconductor materials are given. These results are prerequisite for the implementation and use of laser interference thermometry in industrial processes and researches.
Experimental determination of temperature dependence of refractive index of semiconductor materials The experimental results of determination of temperature dependence of refractive index n (T) of a number of wide-band semiconductor materials are given. These results are prerequisite for the implementation and use of laser interference thermometry in industrial processes and researches.
Tags: laser thermometry light interference refractive index the probe radiation зондирующее излучение интерференция света лазерная термометрия показатель преломления
N.Koltovoi
Spectral methods in criminalistics Spectral methods are applied in forensic medical examination when detecting washed out traces and traces located on multicolored, dark and dirty objects. Separate field of study is represented by the examination of works of art (paintings) authenticity when the spectral methods allow detecting the falsification. Use of spectral methods for the examination in criminalistics is considered in the article. Various hardware tools are described for the implementation of spectral methods.
Spectral methods in criminalistics Spectral methods are applied in forensic medical examination when detecting washed out traces and traces located on multicolored, dark and dirty objects. Separate field of study is represented by the examination of works of art (paintings) authenticity when the spectral methods allow detecting the falsification. Use of spectral methods for the examination in criminalistics is considered in the article. Various hardware tools are described for the implementation of spectral methods.
Biophotonics
A.Budagovsky, O.Budagovskaya, I.Budagovsky
Intercellular communication through coherent radiation. Part 2 Probably the most discussed and dramatic issue of biology consists in the transformation of genetic information or nucleotide sequence into the complex architectonics of integral organism. Specialists have been trying to solve it over the period of last hundred years suggesting quite realistic and absolutely fantastic conceptions. It is proved in the article that the highest stimulation effect is shown when the cell is completely fitted in the volume of field coherence.
Intercellular communication through coherent radiation. Part 2 Probably the most discussed and dramatic issue of biology consists in the transformation of genetic information or nucleotide sequence into the complex architectonics of integral organism. Specialists have been trying to solve it over the period of last hundred years suggesting quite realistic and absolutely fantastic conceptions. It is proved in the article that the highest stimulation effect is shown when the cell is completely fitted in the volume of field coherence.
Tags: biochemical luminescence coherence degree coherent radiation control field communication high coherence intercellular interaction low coherence morphogenesis "biofield" "биополе" tissue thickness биохемилюминесценция когерентное излучение межклеточное взаимодействие морфогенез полевая коммуникация
O. Kovalenko, Yu.Pilshchikova, E.Guseva
Lighting facility with radiation in UV- and visible spectral ranges for poultry The issues of development and improvement of energy-saving and biologically-efficient lighting facilities for poultry farming are considered in the article. It is shown that the using of the system of general and local illumination and irradiation from blue-green light emitting diode clusters and ultraviolet lamps enhances the parameters of poultry productivity.
Lighting facility with radiation in UV- and visible spectral ranges for poultry The issues of development and improvement of energy-saving and biologically-efficient lighting facilities for poultry farming are considered in the article. It is shown that the using of the system of general and local illumination and irradiation from blue-green light emitting diode clusters and ultraviolet lamps enhances the parameters of poultry productivity.
Optical measurements
S.S.Alieva, R.O. Huseynova
Method of calibration of remote spectrometric meter of heavy metal concentration on land plots Reliability of remote monitoring results with regard to the concentration of heavy metals in soils and vegetation using the airborne spectrometric devices is limited by existing problems of equipment calibration and absence of common criteria of element identification. The method of on-line calibration of airborne spectral systems at remote evaluation of heavy metal content is suggested.
Method of calibration of remote spectrometric meter of heavy metal concentration on land plots Reliability of remote monitoring results with regard to the concentration of heavy metals in soils and vegetation using the airborne spectrometric devices is limited by existing problems of equipment calibration and absence of common criteria of element identification. The method of on-line calibration of airborne spectral systems at remote evaluation of heavy metal content is suggested.