Method of guided termocleavage of glass, was developed in 80-th(1) and found wide expansion in precession breaking of glass for displays, that is proved with appropriate equipment and a wide variety of publications(1-2).
There are few advantages of this method: high speed of cutting; high accuracy in processing; low power intensity of process; high purity of process, cause of wastelessness of cutting process; zero width of cut.
Feature of this method is that cutting of glass is executed due to making of separating split under the voltage of straining, caused of the heating of material with laser radiation and next freezing of zone of heat using refrigerating medium(1-2).
The existing termocleavage technologies by means of infra-red (IR) lasers - CO2 and Nd have some insuperable constraints such as: the problem of intersection of through-the-thickness crack across previously made by laser, the problem of guided thermocrack drift from linearity upon laser emission input and output into glass samples and others problems.
We offer to use other laser radiation sources for overcoming these problems. Preview analyze showed, that the most optimal laser sources are lasers with the spectrum in the field of translucency of glasses (2-7 micron).
The process of high-intensity evaporation from the surface of quartz glass blank with use of infrared radiation of CO2 laser is considered. It is shown that the evaporation product is an amorphous SiO2 powder with particle size of 70 nm.
High monochromaticity, coherence and low divergence of the laser are the properties thanks to which it has become possible to build a promising high-concentration kind of heat energy emitter. As a source of welding energy, the laser beam has provided welding practices with new features. At present, the laser is the only available energy source that reaches power densities of more than 106 W/cm2 thus maintaining deep welding requirements.
The laser welding evolution has further developed in hybrid welding methods, such as two-beam, laser-arc, laser-induction, laser-plasma, lighting laser processing procedures that, due to their high technical and economical efficiency, find ever multiplying applications in industry.
A technical design of the OSIRIS two-based optical space interferometer is based on the carbon-fiber technology and on the newest Russian achievements in laser metrology and light sensors. The whole instrument was designed as a payload to the Russian Segment of the ISS and it consists of two blokes that will be brought to the ISS by transport spacecraft Progress and installed there by astronauts. Short-live devices of the OSIRIS interferometer - light sensor and metrological laser - are replaceable for fast repairs in the open space conditions. Due to the carbon- fiber strongly constructed case and to the absence of reserved devices the total mass of the OSIRIS interferometer will not exceed 250 kg. The two-based interferometer OSIRIS consists of four off-axis telescopes will have its own guide for precision pointing to the target stars. The whole instrument will use its own independent to the ISS pointing and tracking systems. It will be mounted to the RS ISS by magnetic controlled suspension device. The OSIRIS Project was admitted to the Russian National Space Program as a payload to the RS ISS at the promoted stage, and it might be launched at 2002-2003 years.
Victor Masychev, Valentin Sysoev, Konstantin Pichkhadze, Konstantin Lezvinsky, Yuri Bulkin, Vladimir Andreev, Vladimir Eftiheev, Vladimir Rumyantzev, Ilya Tarasov, Boris Papchenko
KEYWORDS: Satellites, Laser applications, Semiconductor lasers, Laser systems engineering, Laser sources, Quantum efficiency, Control systems, Power supplies, Optical components, High power lasers
In the article the project of a laser channel of remote power transmission in space is shown. In details is circumscribed elements and system for implementation of experiment on power transmission, within the frame of the possible scientific and applied projects of experiments on the International Space Station (ISS), on a distance more than 1000 m with a level of power more than 1000 W. The capability of increase of power of radiation is shown. The capability of reaching efficiency of a channel of power transmission up to 30% is designed. Also in the article a number of possible additional applications of the given system-data transfer with high speed and measurement of geometric parameters of interposition satellite-satellite is shown. The article contains analysis of using a channel power transmission for information-measuring whole.
Finn Christensen, Peter Frederiksen, Josef Polny, Ib Rasmussen, Hans-Joachim Wiebicke, Oleg Terekhov, Konstantin Borozdin, Tatyana Litvinova, Valentin Sysoev, Roald Kremnev, Sergei Aleksashkin, Oleg Stekolchikov
This paper describes the design and the successful integration of the optical block of the SODART telescopes to be flown on the Spectrum Roentgen Gamma satellite. The integration involves both the integration of the two high throughput x-ray telescopes as well as the objective crystal spectrometer. The integrated unit meets all mechanical, thermal and optical specifications and it is now in safe storage in Moscow and awaits further integration procedures with the remaining satellite structure.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.