The Modulation Transfer Function And Phase Structure Function Of An Optical Wave In A Turbulent Medium PDF Download
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| Author | : R. F. Lutomirski |
| Publisher | : |
| Total Pages | : 11 |
| Release | : 1969 |
| Genre | : Optical transfer function |
| ISBN | : |
Download The Modulation Transfer Function and Phase Structure Function of an Optical Wave in a Turbulent Medium Book in PDF, ePub and Kindle
Expressions are derived for the dependence of the modulation transfer function (MTF) and the phase structure function (D sub phi) on the Kolmogorov turbulence parameters. In particular, it is demonstrated that certain measurements of the MTF and D sub phi can be interpreted in terms of an outer scale of turbulence being of the order 10-50 cm, values which typically can be expected under inversion conditions. (Author).
| Author | : Harold T. Yura |
| Publisher | : |
| Total Pages | : 19 |
| Release | : 1969 |
| Genre | : Atmospheric turbulence |
| ISBN | : |
Download Irradiance Statistics, Modulation Transfer Function, and Phase Structure Function of an Optical Wave in a Turbulent Medium Book in PDF, ePub and Kindle
An analysis of experimentally observed far-field irradiance statistics, suggesting an approach to calculating the probability distribution for intensity fluctuations of an optical wave in a turbulent medium and expressions for measuring important wave characteristics. Two theoretical treatments of probability distribution are investigated. Because none of the proposed theories can account for irradiance statistics in a consistent manner, it is suggested that a modified geometric optics approach would lead to an improved quantitative understanding of the phenomena. Expressions are derived for measuring wave phase structure function and modulation transfer function. Results are useful in determining the limited resolution obtainable in forming an image through a turbulent medium, as well as in calculating the signal-to-noise ratio of an optical heterodyne detection system. (Author).
| Author | : |
| Publisher | : |
| Total Pages | : 380 |
| Release | : 1995 |
| Genre | : Aeronautics |
| ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
| Author | : Glenn D. Boreman |
| Publisher | : SPIE Press |
| Total Pages | : 124 |
| Release | : 2001 |
| Genre | : Science |
| ISBN | : 9780819441430 |
Download Modulation Transfer Function in Optical and Electro-optical Systems Book in PDF, ePub and Kindle
This tutorial introduces the theory and applications of MTF, used to specify the image quality achieved by an imaging system. It covers basic linear systems theory and the relationship between impulse response, resolution, MTF, OTF, PTF, and CTF. Practical measurement and testing issues are discussed.
| Author | : |
| Publisher | : |
| Total Pages | : 1054 |
| Release | : 1971 |
| Genre | : Aerodynamics |
| ISBN | : |
Download NASA Technical Report Book in PDF, ePub and Kindle
| Author | : Michael W. Fitzmaurice |
| Publisher | : |
| Total Pages | : 196 |
| Release | : 1971 |
| Genre | : Atmospheric chemistry |
| ISBN | : |
Download Experimental Investigations of Optical Propagation in Atmospheric Turbulence Book in PDF, ePub and Kindle
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.
| Author | : Ronald Louis Fante |
| Publisher | : |
| Total Pages | : 44 |
| Release | : 1974 |
| Genre | : Atmospheric turbulence |
| ISBN | : |
Download Covariance of the Intensity Fluctuations of a Wave in a Random Medium Book in PDF, ePub and Kindle
| Author | : |
| Publisher | : |
| Total Pages | : 1002 |
| Release | : 1979 |
| Genre | : Optical instruments |
| ISBN | : |
Download Journal of the Optical Society of America Book in PDF, ePub and Kindle
| Author | : Valerian Ilich Tatarski |
| Publisher | : Courier Dover Publications |
| Total Pages | : 305 |
| Release | : 2016-12-14 |
| Genre | : Science |
| ISBN | : 0486810291 |
Download Wave Propagation in a Turbulent Medium Book in PDF, ePub and Kindle
This monograph describes the phenomena associated with the propagation of electromagnetic and acoustic waves through atmospheric turbulence. Geared toward specialists in radiophysics and atmospheric acoustics and optics, the treatment is also suitable for advanced undergraduates and graduate students. The author stresses applications to phase and amplitude fluctuations, scintillation of stars, radio scattering, and other problems. Part I covers topics from the theory of random fields and turbulence theory, including statistical description. Part II, on the scattering of waves in the turbulent atmosphere, is supplemented by an appendix on scattering of acoustic radiation. Part III offers a detailed presentation of line-of-sight propagation of acoustic and electromagnetic waves through a turbulent medium. Part IV concludes the text with a comparison of theory with experimental data
| Author | : Azriel Rosenfeld |
| Publisher | : Academic Press |
| Total Pages | : 470 |
| Release | : 1976-01-01 |
| Genre | : Technology & Engineering |
| ISBN | : 0323148263 |
Download Digital Picture Processing Book in PDF, ePub and Kindle
Digital Picture Processing is a technique-oriented book aiming to teach the more extensive treatments of digital pictures. The book discusses picture processing; the computer representation of pictures; and the mathematical preliminaries involved. The visual perception, the digitization and the different techniques on sampling, and different techniques on compression are also covered. The book also explains the enhancement techniques, such as sharpening and moothing; filtering techniques used in restoration; and the geometry and description of a picture. The text is recommended to students of electrical engineering and computer science, who intend to learn better techniques in picture processing through digital means. The book is also suitable as an advanced undergraduate or a graduate course in picture processing.
