• On the nature of the measureme...

Treffer: On the nature of the measurements provided by a pyramid wave-front sensor

Title:
On the nature of the measurements provided by a pyramid wave-front sensor
Authors:
VERINAUD, Christophe
Source:
Optics communications. 233(1-3):27-38
Publisher Information:
Amsterdam: Elsevier Science, 2004.
Publication Year:
2004
Physical Description:
print, 20 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, Geophysique externe, External geophysics, Météorologie, Meteorology, Convection, turbulence, diffusion. Structure et dynamique de la couche limite atmosphérique, Convection, turbulence, diffusion. Boundary layer structure and dynamics, Astronomie, Astronomy, Astronomie fondamentale et astrophysique. Instrumentation, techniques, et observations astronomiques, Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations, Instruments d'astronomie et de recherche spatiale, Astronomical and space-research instrumentation, Télescopes infrarouges, optiques et ultraviolets au sol, Ground-based ultraviolet, optical, and infrared telescopes, 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, Atmospheric turbulence effects, Ground-based ultraviolet, optical and infrared telescopes, Astronomie, Astronomy, Bruit optique, Optical noise, Capteur, Sensors, Détecteur phase, Phase detectors, Etude théorique, Theoretical study, Front onde, Wave front, Montage optique, Optical set up, Montaje óptico, Optique adaptative, Adaptive optics, Optique diffractive, Diffractive optics, Propagation erreur, Growth of error, Propagación error, Turbulence atmosphérique, Atmospheric turbulence
Document Type:
Fachzeitschrift Article
File Description:
text
Language:
English
Author Affiliations:
European Southern Observatory (ESO), Adaptive Optics Department, Karl-Schwarzschild-Str. 2, 85748 Garching bei Muenchen, Germany
ISSN:
0030-4018
Access URL:
http://pascal-francis.inist.fr/vibad/index.php?action=search&terms=15512357
Rights:
Copyright 2004 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

External geophysics
Accession Number:
edscal.15512357
Database:
PASCAL Archive

Weitere Informationen

The Pyramid Wave-Front Sensor (PWS) [J. Mod. Opt., 43 (1996) 289] was first presented as a novel slope sensor which is similar to the well-known Shack-Hartmann Sensor (SHS), with the advantage of a better sensitivity in closed loop operation [Astron. Astrophys. 350 (1999) L23]. An ideal SHS measures the first derivative of an incident wave-front thus permitting the main properties of error propagation to be determined. In this paper, an easy-to-handle relationship between the PWS measurements and the wave-front phase is derived and the results are compared to an existing analytical model for the SHS [Proc. SPIE 3353 (1998) 1038]. This new model shows that the PWS inherits some properties of both slope and direct phase sensors. Comparison of results confirms the gain in limiting magnitude over the SHS and predicts a significantly lower sensitivity to aliasing and thus more contrast in corrected images.