New PDF release: Adaptive Beaming and Imaging in the Turbulent Atmosphere

By Vladimir P. Lukin, Boris V. Fortes

ISBN-10: 0819443379

ISBN-13: 9780819443373

As a result large program of adaptive optical platforms, an realizing of optical wave propagation in randomly inhomogeneous media has turn into crucial, and several other numerical versions of person AOS elements and of effective correction algorithms were constructed. This monograph includes unique descriptions of the mathematical experiments that have been designed and conducted 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 process

- Adaptive Imaging

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

- A Reference Beacon as a Key component to an Adaptive Optics method

- end

- Index

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

Example text

Automated System for Calculation of the Absorption Characteristics of the Atmosphere, Part 1, Izv. Z. Ser. , 1984, Manuscript on deposit with VINITI. CHAPTER 2 Modeling an Adaptive Optics System In Chapter 1, we discussed methods for numerically simulating the propagation of an optical wave through the atmosphere. The approaches considered allow adequate modeling of turbulent distortion and thermal blooming of coherent optical radiation. However, the development of a numerical model for atmospheric distortions of optical waves is not our objective; it is only a tool for studying the efficiency of adaptive correction of distortions introduced by a propagation medium in the operation of optical systems.

30) with respect to operation of conjugation for the discrete spectrum of the real function takes the form SL , M  S* L ,  M . 31) After calculation of the inner sum in Eq. 32) where the property SˆLx, M  Sx*L , M . This allows us to calculate the inner sum for only non-negative values of M and thus obtain a twofold decrease in the number of mathematical operations. Thus, the modification developed for the spectral sample method is the following sequence of operations: 1. Determine the first half of the rows of the 2D array of Fourier coefficients according to Eq.

The temporal resolution of an adaptive system is determined on the one hand by the correction algorithm and on the other hand by the operating band of the frequencies of the electronic, mechanical, and optical elements of the system. The spatial resolution, in turn, is mostly determined by the geometry of such key elements of the system as the wavefront sensor and the corrector. , development of an efficient numerical model of the sensor and corrector from the viewpoint of making allowance for their geometry, in particular the arrangement and number of elements.

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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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