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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 198401.0, MPI für Astronomie / Publikationen_mpia
Calibration of NAOS and CONICA static aberrations. Experimental results
Authors:Hartung, M.; Blanc, A.; Fusco, T.; Lacombe, F.; Mugnier, L. M.; Rousset, G.; Lenzen, R.
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Astronomy and Astrophysics
Journal Abbrev.:Astronomy and Astrophysics
Volume:399
Start Page:385
End Page:394
Review Status:not specified
Audience:Not Specified
Abstract / Description:NAOS is the first adaptive optics (AO) system
of the Very Large Telescope and will provide
CONICA with diffraction-limited images. CONICA
is a near infrared camera that offers a variety
of imaging and spectroscopic observing modes. A
technique will be described to benefit of the AO
system to correct not only for atmospheric
turbulence but also for the internal optical
aberrations of the high-resolution camera and
the beam splitters of NAOS. The aberrant optical
components in the light path of CONICA as well
as the beam splitters are outside of the AO loop
and therefore no self-acting correction is
possible. Independently of the AO wavefront
sensor, a separate measurement of these
aberrations using a method called phase
diversity allows one to predict for a certain
instrument configuration the corresponding
aberrations. They are quantified by sets of
Zernike coefficients that are rendered to the
adaptive optics. This technique turns out to be
very flexible and results in a further
improvement of the optical overall performance.
The application of phase diversity to the
instrument is investigated in a preceding paper
(Blanc et al. 2003). In the present paper we
present in detail the instrumental
implementation of phase diversity, the obtained
calibration results, and the achieved gain in
optical performance.
Free Keywords:instrumentation: adaptive optics
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:K ouml;nigstuhl 17, 69117 Heidelberg, Germany
<EMAIL>hartung@mpia.de</EMAIL>), AB(Office
National d' Eacute;tudes et de Recherches
A eacute;rospatiales, D eacute;partement
d'Optique Th eacute;orique et Appliqu eacute;e,
BP 72, 92322 Ch acirc;tillon Cedex, France;
Laboratoire des Signaux et Syst egrave;mes,
Eacute;cole Sup eacute;rieure
d' Eacute;lectricit eacute;, Plateau de Moulon,
91192 Gif-sur-Yvette, France), AC(Office National
d' Eacute;tudes et de Recherches
A eacute;rospatiales, D eacute;partement
d'Optique Th eacute;orique et Appliqu eacute;e,
BP 72, 92322 Ch acirc;tillon Cedex, France),
AD(Observatoire Paris-Meudon, LESIA, Place Jules
Janssen, 92195 Meudon Cedex, France), AE(Office
National d' Eacute;tudes et de Recherches
A eacute;rospatiales, D eacute;partement
d'Optique Th eacute;orique et Appliqu eacute;e,
BP 72, 92322 Ch acirc;tillon Cedex, France),
AF(Office National d' Eacute;tudes et de
Recherches A eacute;rospatiales,
D eacute;partement d'Optique Th eacute;orique
et Appliqu eacute;e, BP 72, 92322
Ch acirc;tillon Cedex, France),
AG(Max-Planck-Institut f uuml;r Astronomie,
K ouml;nigstuhl 17, 69117 Heidelberg, Germany)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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