Journal ArticleDOI
Rician Distribution to Describe Speckle Statistics in Adaptive Optics
TLDR
A procedure that uses the Rician distribution to predict the intensity statistics of the light at the image center as a function of the number of corrected Zernike polynomials is provided.Abstract:
Adaptive optics systems allow us to retrieve high-spatial-frequency information that is preserved in the wave fronts distorted by the atmosphere. Although wave-front correction should be as complete as possible, only partial compensation is attainable in the visible. We provide a procedure that uses the Rician distribution to predict the intensity statistics of the light at the image center as a function of the number of corrected Zernike polynomials.read more
Citations
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Journal ArticleDOI
Speckle Noise and Dynamic Range in Coronagraphic Images
TL;DR: In this article, the statistical properties of the residual starlight in coronagraphic images and the effect of a coronagraph on the speckle and photon noise were derived and analyzed.
Journal ArticleDOI
The Usefulness and Limits of Coronagraphy in the Presence of Pinned Speckles
C. Aime,Rémi Soummer +1 more
TL;DR: In this article, the utility and limitations of ground-based coronagraphy with adaptive optics (AO) were studied. And the authors showed that the effect of small errors in the complex wave in the focal plane, amplified by the coherent part of the wave, can be explained by a modified Rician distribution.
Journal ArticleDOI
Speckle Statistics in Adaptively Corrected Images
TL;DR: In this article, a fast readout mode was developed to take short exposures of stellar images corrected by adaptive optics at ground-based UCO/Lick Observatory, with integration times of 5 ms and a time between successive frames of 14.5 ms (λ = 2.2 μm).
Journal ArticleDOI
Generalized Fried parameter after adaptive optics partial wave-front compensation
TL;DR: In this article, a generalized Fried parameter, rho(0), was introduced to compensate for turbulence-induced distortions in adaptive optics systems, which plays the same role as r(0) but in partial compensation.
Journal ArticleDOI
Statistics of intensity in adaptive-optics images and their usefulness for detection and photometry of exoplanets
TL;DR: An introduction to the problem of modeling the probability density function of adaptive-optics speckle and it is shown that with the modified Rician distribution one cannot describe the statistics of light on axis, a dual solution is proposed.
References
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Journal ArticleDOI
Zernike polynomials and atmospheric turbulence
TL;DR: In this paper, a Zernike representation of the Kolmogoroff spectrum of turbulence is given that provides a complete analytical description of the number of independent corrections required in a wave-front compensation system.
Book
Imaging Through Turbulence
TL;DR: In this article, Fourier and Statistical Optics Fourier Optics statistical Optics Turbulence Effects on Imaging Systems Index of Refraction Fluctuations in the Atmosphere Statistics of Index of Reconstant Fluctuation Wave Propagation through Random Media First-Order Turbulences Effects on Incoherent Imaging Modal Expansions of Phase Perturbation Phase Screen Generation Speckle Imaging Techniques Introduction Overview of Speckles Imaging SpeckLE Interferometry Fourier Phase Estimation Techniques Image Reconstruction for Specksle Imaging Conclusion Adaptive Optical Imaging Systems Introduction Factors
Journal ArticleDOI
Atmospheric wavefront simulation using Zernike polynomials
TL;DR: An algorithm is described that simulates atmospherically distorted wavefronts using a Zernike expansion of randomly weighted Karhunen- Loeve functions, and is then used to forecast resulting structure function and Strehl resolution for adaptive optics systems.
Journal ArticleDOI
Modal compensation of atmospheric turbulence phase distortion
J. Y. Wang,J. K. Markey +1 more
TL;DR: In this article, a new method of evaluating the MTF of a Kolmogorov turbulence phase aberration Zernike modal compensating system using an approximation of the correlation of the residual phase aberrations and the compensating phase distribution is described.
Journal ArticleDOI
Ground-based imaging of extrasolar planets using adaptive optics
TL;DR: In this paper, the authors proposed using adaptive optics operating at fundamental performance limits to detect planets orbiting nearby stars using a ground-based ground-truth adaptive camera and a large-scale adaptive optics system.