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Download e-book for iPad: Adaptive Beaming and Imaging in the Turbulent Atmosphere by Vladimir P. Lukin, Boris V. Fortes

By Vladimir P. Lukin, Boris V. Fortes

ISBN-10: 0819443379

ISBN-13: 9780819443373

As a result of broad software of adaptive optical platforms, an knowing of optical wave propagation in randomly inhomogeneous media has turn into crucial, and several other numerical types of person AOS parts and of effective correction algorithms were built. This monograph comprises specified descriptions of the mathematical experiments that have been designed and performed in the course of greater than a decade's worthy of research.

Contents

- Preface to the English variation

- advent

- Mathematical Simulation of Laser Beam Propagation within the surroundings

- Modeling an Adaptive Optics approach

- Adaptive Imaging

- Minimization and part Correction of Thermal Blooming of High-Power Beams

- A Reference Beacon as a Key section of an Adaptive Optics approach

- end

- Index

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Extra info for Adaptive Beaming and Imaging in the Turbulent Atmosphere (SPIE Press Monograph Vol. PM109)

Example text

Ya. , in: Third All-Union Conference on Atmospheric Optics and Actinometry, Part 2, Abstracts, pp. 227–229, 1983. 57. S. A. I. V. Blakhovskaya, in Seventh All-Union Symposium on Laser and Acoustic Sounding of the Atmosphere, Part 2, Abstracts, IAO, Siberian Branch of the Russian Academy of Sciences, Tomsk, pp. 248-251, 1982. 58. S. , Statistical Characteristics of Temperature and Humidity Fields in the Atmosphere of the Northern Hemisphere, Part 4, Handbook, Gidrometeoizdat, Leningrad, 1981. 59.

5) al  S (r ) Zl (r )d 2 r , 2 R r  R  are also Gaussian with a zero mean. To determine these coefficients, we have only to calculate the elements of the correlation matrix Ckl  ak al  1  R d r   d   2 2 2 r  R 2     r  Z k  r   Z k  r   S  r   S  r   . 8) rR we obtain the following equation for elements of the correlation matrix Ck l:     Ckl     Q k            Ql    d 2 H    d 2 H     . 9) Mathematical Simulation of Laser Beam Propagation in the Atmosphere 27 Calculation of the integral [Eq.

25) Let us use this relation in a problem of thermal blooming. 26) t CP where  is the absorption coefficient, 0 is the medium density, CP is specific  heat at constant pressure, V  z  is the wind velocity profile, and  is heat conductivity. 27) ( z )nt , nt  n / t . 0 C P Then consider the propagation of two high-power optical beams with the boundary conditions of Eqs. 15). We have the parameters of the  path at which thermal blooming of the first beam occurs: V 1  z  , 1(z), and 1  z  .

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Adaptive Beaming and Imaging in the Turbulent Atmosphere (SPIE Press Monograph Vol. PM109) by Vladimir P. Lukin, Boris V. Fortes


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