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Proceedings Paper

Integration and bench testing for the GRAVITY Coudé IR adaptive optics (CIAO) wavefront sensor
Author(s): C. Deen; P. Yang; A. Huber; M. Suarez-Valles; S. Hippler; W. Brandner; E. Gendron; Y. Clénet; S. Kendrew; A. Glauser; R. Klein; W. Laun; R. Lenzen; U. Neumann; J. Panduro; J. Ramos; R.-R. Rohloff; A. Salzinger; N. Zimmerman; T. Henning; K. Perraut; G. Perrin; C. Straubmeier; A. Amorim; F. Eisenhauer
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Paper Abstract

GRAVITY, a second generation instrument for the Very Large Telescope Interferometer (VLTI), will provide an astrometric precision of order 10 micro-arcseconds, an imaging resolution of 4 milli-arcseconds, and low/medium resolution spectro-interferometry. These improvements to the VLTI represent a major upgrade to its current infrared interferometric capabilities, allowing detailed study of obscured environments (e.g. the Galactic Center, young dusty planet-forming disks, dense stellar cores, AGN, etc...). Crucial to the final performance of GRAVITY, the Coudé IR Adaptive Optics (CIAO) system will correct for the effects of the atmosphere at each of the VLT Unit Telescopes. CIAO consists of four new infrared Shack-Hartmann wavefront sensors (WFS) and associated real-time computers/software which will provide infrared wavefront sensing from 1.45-2.45 microns, allowing AO corrections even in regions where optically bright reference sources are scarce. We present here the latest progress on the GRAVITY wavefront sensors. We describe the adaptation and testing of a light-weight version of the ESO Standard Platform for Adaptive optics Real Time Applications (SPARTA-Light) software architecture to the needs of GRAVITY. We also describe the latest integration and test milestones for construction of the initial wave front sensor.

Paper Details

Date Published: 7 August 2014
PDF: 8 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91482T (7 August 2014); doi: 10.1117/12.2055127
Show Author Affiliations
C. Deen, Max-Planck-Institut für Astronomie (Germany)
P. Yang, Max-Planck-Institut für Astronomie (Germany)
Shanghai Institute of Optics and Fine Mechanics (China)
A. Huber, Max-Planck-Institut für Astronomie (Germany)
M. Suarez-Valles, European Southern Observatory (Germany)
S. Hippler, Max-Planck-Institut für Astronomie (Germany)
W. Brandner, Max-Planck-Institut für Astronomie (Germany)
E. Gendron, LESIA, CNRS, Observatoire de Paris (France)
Y. Clénet, LESIA, CNRS, Observatoire de Paris, Univ. Paris Diderot (France)
S. Kendrew, Max-Planck-Institut für Astronomie (Germany)
Univ. of Oxford (United Kingdom)
A. Glauser, Max-Planck-Institut für Astronomie (Germany)
ETH Zürich (Switzerland)
R. Klein, Max-Planck-Institut für Astronomie (Germany)
W. Laun, Max-Planck-Institut für Astronomie (Germany)
R. Lenzen, Max-Planck-Institut für Astronomie (Germany)
U. Neumann, Max-Planck-Institut für Astronomie (Germany)
J. Panduro, Max-Planck-Institut für Astronomie (Germany)
J. Ramos, Max-Planck-Institut für Astronomie (Germany)
R.-R. Rohloff, Max-Planck-Institut für Astronomie (Germany)
A. Salzinger, Max-Planck-Institut für Astronomie (Germany)
N. Zimmerman, Max-Planck-Institut für Astronomie (Germany)
T. Henning, Max-Planck-Institut für Astronomie (Germany)
K. Perraut, UJF-Grenoble 1, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
G. Perrin, LESIA, CNRS, Observatoire de Paris, Univ. Paris Diderot (France)
Groupement d'Intérêt Scientifique PHASE (France)
C. Straubmeier, Univ. zu Köln (Germany)
A. Amorim, Lab. de Sistemas, Instrumentação e Modelação em Ciências e Tecnologias do Ambiente e do Espaço (Portugal)
F. Eisenhauer, Max-Planck-Institut für extraterrestrische Physik (Germany)


Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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