Book ChapterDOI
V The Effects of Atmospheric Turbulence in Optical Astronomy
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In this article, the authors discuss the effects of atmospheric turbulence in optical astronomy, summarizes the present state of the theory, reviews the experimental checks that have been made, and discusses the implications in the domain of astronomical observations.Abstract:
Publisher Summary This chapter discusses the effects of atmospheric turbulence in optical astronomy, summarizes the present state of the theory, reviews the experimental checks that have been made, and discusses the implications in the domain of astronomical observations. Diffraction limited resolution has been obtained with large telescopes up to magnitude 13 by means of speckle interferometry. A Michelson interferometer is already working in the visible on a 20 m baseline up to magnitude 4, and many projects are nearing completion. However, such technological progress can be useful only if accurate quantitative measurements prove to be feasible through atmospheric turbulence. In addition, much work remains to be done before achieving a full understanding of atmospheric effects. The relationship between isoplanicity or speckle boiling and the structure of the atmosphere is still not clear.read more
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Simulation of a Kolmogorov phase screen
TL;DR: In this paper, two methods for modeling Kolmogorov phase fluctuations over a finite aperture are described, one relies on the incorporation of subharmonics in order to model accurately the low frequencies of the Kolgorov spectrum.
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Interferogram analysis using Fourier transform techniques
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TL;DR: A Gerchberg-type iterative technique is used to eliminate edge effects in several types of interferogram and results are presented for seeing measurements and interferometric tests.
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Optical interferometry in astronomy
TL;DR: The current state of the field of optical stellar interferometry, concentrating on ground-based work although a brief report of space inter-ferometry missions is included as mentioned in this paper, is reviewed.
References
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Journal ArticleDOI
Reconstruction of an object from the modulus of its Fourier transform.
TL;DR: A digital method for solving the phase-retrieval problem of optical-coherence theory: the reconstruction of a general object from the modulus of its Fourier transform, which should be useful for obtaining high-resolution imagery from interferometer data.
ReportDOI
Statistical properties of laser sparkle patterns
TL;DR: In this article, the first order statistics of the observed electric-field strength, the observed light intensity, and observed light phase are examined, and the autocorrelation functions of the complex field and intensity processes are investigated, and that of the electric field is found to be proportional to the Fourier transform of the light intensity distribution incident on the scattering surface.
Journal ArticleDOI
Optical Resolution Through a Randomly Inhomogeneous Medium for Very Long and Very Short Exposures
TL;DR: In this article, the average resolution of very-long and very-short-exposure images is studied in terms of the phase and log-amplitude structure functions, whose sum is called the wave-structure function.
Book ChapterDOI
Statistical Properties of Laser Speckle Patterns
TL;DR: In this article, the first-order statistics of the complex amplitude, intensity and phase of speckle are derived for a free-space propagation geometry and for an imaging geometry.
Journal ArticleDOI
On the Spectrum of Isotropic Temperature Fluctuations in an Isotropic Turbulence
TL;DR: In this paper, the one-dimensional and three-dimensional spectral equations for a field of isotropic temperature fluctuations in a turbulent environment are derived from the correlation equation. And the relative effective cut-off wave numbers of the two spectra are compared in terms of the fluid Prandtl number.