Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Description Of Atmospheric Turbulence For Linear Propagation Of Laser Beams
Download Description Of Atmospheric Turbulence For Linear Propagation Of Laser Beams full books in PDF, epub, and Kindle. Read online Description Of Atmospheric Turbulence For Linear Propagation Of Laser Beams ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Description of Atmospheric Turbulence for Linear Propagation of Laser Beams by : Henry Hidalgo
Download or read book Description of Atmospheric Turbulence for Linear Propagation of Laser Beams written by Henry Hidalgo and published by . This book was released on 1970 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper considers the fluid mechanical aspects and data relevant to the propagation of low power-density lasers in the atmospheric boundary layer. Its scope includes the following topics: (a) formulation of the role of the turbulent structure in determining phase and amplitude characteristics of received signals, with emphasis on single scattering situations, (b) review of available fluid mechanical data for mean and fluctuating flow properties for various atmospheric conditions, (c) identification of the atmospheric conditions that require complementary fluid mechanical measurements, and (d) problem areas that need further theoretical investigations concerning the effect of atmospheric turbulence on optical wave propagation. (Author).
Book Synopsis Laser Beam Propagation in the Atmosphere by : Hugo Weichel
Download or read book Laser Beam Propagation in the Atmosphere written by Hugo Weichel and published by SPIE Press. This book was released on 1990 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Beam Propagation in the Atmosphere by : J. W. Strohbehn
Download or read book Laser Beam Propagation in the Atmosphere written by J. W. Strohbehn and published by . This book was released on 1978 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Turbulence Forecasting by : Edmond M. Dewan
Download or read book Optical Turbulence Forecasting written by Edmond M. Dewan and published by . This book was released on 1980 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a tutorial on the effects of atmospheric turbulence upon systems which rely upon the propagation of LASER beams. In addition to providing a simplified presentation of turbulence theory and optical effects, it describes the state of the art of the new technique of radiosonde estimation of index of refraction fluctuations. Suggestions are given for future research which will help to answer current Air Force needs. The feasibility of some laser systems will depend upon the value of r0, the coherence length (which is related to “C2n” which in turn is related to the degree of turbulence). At present, the statistics of “r0” are inadequate.
Author :Peter B. Ulrich Publisher :SPIE-International Society for Optical Engineering ISBN 13 : Total Pages :444 pages Book Rating :4.3/5 (91 download)
Book Synopsis Propagation of High-energy Laser Beams Through the Earth's Atmosphere by : Peter B. Ulrich
Download or read book Propagation of High-energy Laser Beams Through the Earth's Atmosphere written by Peter B. Ulrich and published by SPIE-International Society for Optical Engineering. This book was released on 1990 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stochastic Models for Laser Propagation in Atmospheric Turbulence by : Robert Patton Leland
Download or read book Stochastic Models for Laser Propagation in Atmospheric Turbulence written by Robert Patton Leland and published by . This book was released on 1989 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Atmospheric Turbulence Effects on Laser Beam Propagation Using Multi-wavelength Laser Beacons by : Joseph Lee Reierson
Download or read book Analysis of Atmospheric Turbulence Effects on Laser Beam Propagation Using Multi-wavelength Laser Beacons written by Joseph Lee Reierson and published by . This book was released on 2011 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigations of Optical Propagation in Atmospheric Turbulence by : Michael W. Fitzmaurice
Download or read book Experimental Investigations of Optical Propagation in Atmospheric Turbulence written by Michael W. Fitzmaurice and published by . This book was released on 1971 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pertinent theoretical background and the results of a group of experiments conducted over 0.4- and 1.17-km near-ground horizontal ranges are presented. (1) The log-amplitude variances for HeNe (0.633 μm) and CO2 (10.6 μm) laser beams were found to have a ratio of 26.8, which is in close agreement with the predictions of Rytov-based spherical-wave theory. (2) Published measurements of the saturation level of the log-amplitude variance are reviewed and several inconsistencies noted. (3) The spatial correlation function of irradiance field was measured and found to agree with theory. The degree of correlation between different frequency beams which had traversed the same optical path was also measured and compared to theory. The data exhibited an unacceptably large scatter and did not show the wavelength dependence. (4) The log-normal, Rayleigh, and Rice probability distributions are discussed in terms of their applicability to irradiance statistics. Relatively weak 10.6 μm irradiance fluctuations were found to be equally well described by the log-normal and Rice distributions; strong fluctuations obtained at 0.488 μm were clearly best described by the log-normal distribution.
Book Synopsis Mutual Coherence Function and Frequency Spectrum of a Laser Beam Propagating Through Atmospheric Turbulence by : Ronald Louis Fante
Download or read book Mutual Coherence Function and Frequency Spectrum of a Laser Beam Propagating Through Atmospheric Turbulence written by Ronald Louis Fante and published by . This book was released on 1974 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mutual coherence function of a laser beam propagating in turbulence with a modified von Karman spectrum for the index of refraction fluctuations, including a parametric study of the effect on the MCF of varying beam size, focal length, and the properties of the turbulence was computed. The results are valid over all propagation distances, unlike calculations employing the method of smooth perturbations. Also studied was the effect of a constant wind on the frequency spectrum of signal. It was found that over most practical path lengths the spectral width is delta omega = 4.1V ((k sub o)sup 6/5)(z sup 3/5)((C sub n, sub 2)sup 3/5), where V is the wind speed, k sub o is the signal wavenumber, C sub n sup 2 is the strength of turbulence, and z is the path length in the turbulence. (Modified author abstract).
Book Synopsis Numerical/Optical Simulation of Laser Beam Propagation Through Atmospheric Turbulence by :
Download or read book Numerical/Optical Simulation of Laser Beam Propagation Through Atmospheric Turbulence written by and published by . This book was released on 1995 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, computer simulation and optical modeling of laser beam propagation through the turbulent atmosphere, as well as development of techniques using photorefractive crystals to mitigate phase distortions in laser beams, have been done. In the framework of the first direction the mathematical methods and computational schemes based on split step operators, phase screen model and the Monte Carlo method have been elaborated. Spatial statistics of light field in laser beam has been studied in relation to inner and outer scales for different models of atmospheric turbulence. Regimes of weak, moderate and strong fluctuations have been considered. In the framework of the second direction the possibility of simulation of double pass and anisoplanatic effects by means of few phase screens has been studied. An experimental set up for optical modeling anisoplanatic effects by the use of dynamic phase modulator has been designed. A method of generation of random optical field with variable correlation function has been proposed and tested. In the framework of the third direction the problem of mitigation of distorted optical signals in photorefractive crystals has been studied. An optimal effective operating range of one way system, based on nonlinear interaction of distorted signal with pumping formed by spatial filtering of the signal, has been found. Using the criterion of maximal mitigation of phase and amplitude distortions, the schemes of two and four beam interaction in InP:Fe have been optimized.
Author :Larry C. Andrews Publisher :SPIE-International Society for Optical Engineering ISBN 13 : Total Pages :820 pages Book Rating :4.3/5 (91 download)
Book Synopsis Laser Beam Propagation Through Random Media by : Larry C. Andrews
Download or read book Laser Beam Propagation Through Random Media written by Larry C. Andrews and published by SPIE-International Society for Optical Engineering. This book was released on 2005 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since publication of the first edition of this text in 1998, there have been several new, important developments in the theory of beam wave propagation through a random medium, which have been incorporated into this second edition. Also new to this edition are models for the scintillation index under moderate-to-strong irradiance fluctuations; models for aperture averaging based on ABCD ray matrices; beam wander and its effects on scintillation; theory of partial coherence of the source; models of rough targets for ladar applications; phase fluctuations; analysis of other beam shapes; plus expanded analysis of free-space optical communication systems and imaging systems.
Book Synopsis Propagation of High-Energy Laser Beam in the Atmosphere by : Charles B. Hogge
Download or read book Propagation of High-Energy Laser Beam in the Atmosphere written by Charles B. Hogge and published by . This book was released on 1974 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric turbulence can affect the propagation of laser beams of any power. Thermal blooming, a nonlinear propagation process, can seriously degrade high-energy beams. These two processes are reviewed in detail, with emphasis on parametric effects such as aperture size wavelength, and focal distance. Included in the discussion are such new topics as supersonic slewing and stagnation zone problems. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Beam Propagation in Non-Kolmogorov Atmospheric Turbulence by :
Download or read book Laser Beam Propagation in Non-Kolmogorov Atmospheric Turbulence written by and published by . This book was released on 1994 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several observations of atmospheric turbulence statistics have been reported which do not obey Kolmogorov's power spectral density model. These observations have prompted the study of optical propagation through turbulence described by non-classical power spectra. This thesis presents an analysis of optical propagation through turbulence which causes index of refraction fluctuations to have spatial power spectra that obey arbitrary power laws. The spherical and plane wave structure functions are derived using Mellin transform techniques and are applied to the field mutual coherence function (MCF) using the extended Huygens-Fresnel principle. The MCF is used to compute the Strehl ratio of a focused, constant amplitude beam propagating in non-Kolmogorov turbulence as the power law for the spectrum of the index of refraction fluctuations is varied from -3 to -4. The relative contributions of the log amplitude and phase structure functions to the wave structure function are computed. If inner and outer scale effects are neglected, no turbulence exists when the power law equals -3. At power laws close to -3, the magnitude of the log amplitude and phase perturbations are determined by the system Fresnel ratio. At power laws approaching -4, phase effects dominate in the form of random tilts.
Book Synopsis Effect of Atmospheric Turbulence On Laser Beam Propagation by :
Download or read book Effect of Atmospheric Turbulence On Laser Beam Propagation written by and published by . This book was released on 1996 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, the effect of atmospheric turbulence on laser beam propagation between tops of the high building and the hill behind our university campus at the distance of 1500m is discussed. The typical range of measurable C(n) values, curvature of the laser beam propagation and the focal spots diameter of the laser beam are given, which are agreement with the theory analysis.
Book Synopsis Optical Beam Propagation in Turbulent Media by : Ronald Louis Fante
Download or read book Optical Beam Propagation in Turbulent Media written by Ronald Louis Fante and published by . This book was released on 1975 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most recent developments on the propagation of microwave and optical beams in turbulent media, such as the clear atmosphere are discussed. Among the phenomena considered are beam spreading, beam wander, loss of coherence, scintillations, angle-of-arrival variations, and short pulse effects. Also included is a discussion of methods of compensation of the effect of turbulence on communications and imaging systems.
Book Synopsis Optical Waves and Laser Beams in the Irregular Atmosphere by : Nathan Blaunstein
Download or read book Optical Waves and Laser Beams in the Irregular Atmosphere written by Nathan Blaunstein and published by . This book was released on 2017-09-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cover -- Half Tilte -- Title Page -- Copyright Page -- Contents -- Preface -- Editors -- Contributors -- Symbols and Abbreviations -- 1. Atmosphere Fundamentals -- 2. Basic Aspects of Optical Wave Propagation -- 3. Atmospheric Turbulence in the Anisotropic Boundary Layer -- 4. Nonlinear Propagation of Laser Radiation in the Atmosphere -- 5. Peculiarities of Propagation of Ultrashort Laser Pulses and Their Use in Atmospheric Sensing -- 6. Isoplanarity Problem in Vision Theory -- Index
