
Proceedings Paper
Closed-loop tomographic control on HOMER wide-field AO bench: experimental results and identification issuesFormat | Member Price | Non-Member Price |
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Paper Abstract
Adaptive Optics (AO) has a limited corrected field of view because of the anisoplanatism effect. Wide Field
AO (WFAO) concepts, such as Multi-Conjugate AO (MCAO), have been developed to overcome this limitation.
These complex WFAO systems raise critical challenges such as tomographic control and calibrations. We present
new results obtained in closed-loop configuration with the laboratory bench HOMER which is devoted to implementation
and validation of these WFAO concepts in the perspective of future VLT/ELT AO systems. Turbulence
is generated with rotating phase screens and multi-directional analysis is performed. Tomographic control relies
on Linear Quadratic Gaussian control (LQG). The correction can be applied thanks to two Deformable Mirrors
(DM). We also focus on calibration issues and models identification. We investigate in particular identification
of relative geometry of the wave front sensors, DM altitude and asterism and its impact on performance.
Paper Details
Date Published: 27 July 2010
PDF: 13 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 773637 (27 July 2010); doi: 10.1117/12.856980
Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)
PDF: 13 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 773637 (27 July 2010); doi: 10.1117/12.856980
Show Author Affiliations
Amelie Parisot, ONERA (France)
Anne Costille, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Anne Costille, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)
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