Open AccessJournal Article
First diffraction-limited astronomical images with adaptive optics
Gérard Rousset,J. C. Fontanella,P. Kern,P. Gigan,Francois Rigaut,Pierre Léna,Corinne Boyer,P. Jagourel,Jean-Paul Gaffard,Fritz Merkle +9 more
Reads0
Chats0
TLDR
Les premieres observations astronomiques realisees avec un systeme d'optique adaptative, basees au sol, sont presentees as discussed by the authors, sont presentedeesAbstract:
Les premieres observations astronomiques realisees avec un systeme d'optique adaptative, basees au sol, sont presenteesread more
Citations
More filters
Journal ArticleDOI
Wave-front temporal spectra in high-resolution imaging through turbulence
TL;DR: In this article, a general formulation for the derivation of theoretical temporal power spectra of quantities related to turbulent wave-front phase is given for various quantities of interest in the field of interferometry (differential piston), wavefront sensing (Shack-Hartmann and curvature sensor), adaptive optics (Zernike polynomials), and seeing monitoring (differentially angle of arrival).
Journal ArticleDOI
Mistral: a myopic edge-preserving image restoration method, with application to astronomical adaptive-optics-corrected long-exposure images
TL;DR: A deconvolution method developed in a Bayesian framework in the context of imaging through turbulence with adaptive optics that uses a noise model that accounts for both photonic and detector noises and reckons with an imperfect knowledge of the point-spread function (PSF).
Journal ArticleDOI
Efficient computation of minimum-variance wave-front reconstructors with sparse matrix techniques.
TL;DR: In this paper, the authors proposed a sparse minimum-variance reconstructor for a conventional natural guide star AO system using a sparse approximation for turbulence statistics and recognizing that the nonsparse matrix terms arising from LGS position uncertainty are low-rank adjustments that can be evaluated by using the matrix inversion lemma.
Journal ArticleDOI
Optimal wave-front reconstruction strategies for multiconjugate adaptive optics.
TL;DR: An optimal approach for the phase reconstruction in a large field of view (FOV) for multiconjugate adaptive optics is proposed based on a minimum-mean-square-error estimator that minimizes the mean residual phase variance in the FOV of interest.
Journal ArticleDOI
First on-sky SCAO validation of full LQG control with vibration mitigation on the CANARY pathfinder.
Gaetano Sivo,Caroline Kulcsár,Jean-Marc Conan,Henri-François Raynaud,Eric Gendron,Alastair Basden,Fabrice Vidal,Tim Morris,Serge Meimon,Cyril Petit,Damien Gratadour,Olivier J. F. Martin,Zoltan Hubert,Arnaud Sevin,Denis Perret,Fanny Chemla,Gérard Rousset,Nigel Dipper,G. Talbot,Eddy Younger,Richard M. Myers,David Henry,Stephen Todd,David Atkinson,Colin Dickson,Andy Longmore +25 more
TL;DR: The first on-sky results of a Kalman filter based LQG control with vibration mitigation on the CANARY instrument at the Nasmyth platform of the 4.2-m William Herschel Telescope are presented.