Treffer: Wavefront estimation at low light levels
Title:
Wavefront estimation at low light levels
Authors:
Source:
Optics communications. 126(1-3):19-24
Publisher Information:
Amsterdam: Elsevier Science, 1996.
Publication Year:
1996
Physical Description:
print, 22 ref
Original Material:
INIST-CNRS
Subject Terms:
Electronics, Electronique, Optics, Optique, Telecommunications, Télécommunications, Sciences exactes et technologie, Exact sciences and technology, Terre, ocean, espace, Earth, ocean, space, Astronomie, Astronomy, Astronomie fondamentale et astrophysique. Instrumentation, techniques, et observations astronomiques, Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations, Techniques d'observation et de réduction des données. Simulation et modélisation par ordinateur, Observation and data reduction techniques. Computer modeling and simulation, Optique adaptative et segmentée, Adaptive and segmented optics, Capteur, Sensors, Front onde, Wave front, Optique atmosphérique, Atmospheric optics, Turbulence atmosphérique, Atmospheric turbulence, Turbulencia atmosférica
Document Type:
Fachzeitschrift
Article
File Description:
text
Language:
English
Author Affiliations:
Department of Electrical and Electronic Engineering, University of Tasmania, GPO Box 252C, Hobart 7001, Australia
ISSN:
0030-4018
Rights:
Copyright 1996 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Astronomy
Accession Number:
edscal.3087211
Database:
PASCAL Archive
Weitere Informationen
A simple technique for reconstructing a wavefront from the measurements of a Shack-Hartmann sensor is described. The optimal estimator used is analysed for the effect of errors in the turbulence model at different light levels. The method is then analysed in situations where the size of the wavefront sensor is restricted by the number of available photons and a guide star is not available. The algorithm uses a priori statistics of the turbulence derived by observing a nearby bright star which can be outside the isoplanatic angle. This differs from previously published estimators since the a priori information is measured rather than derived from a theoretical model of the turbulence.