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Proceedings Paper

Calibration strategy of the pyramid wavefront sensor module of ERIS with the VLT deformable secondary mirror
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Paper Abstract

ERIS is a new Adaptive Optics Instrument for the Adaptive Optics Facility of the VLT that foresees, in its design phase, a Pyramid Wavefront Sensor Module (PWM) to be used with the VLT Deformable Secondary Mirror (VLT-DSM) as corrector. As opposite to the concave secondary mirrors currently in use (e.g. at LBT), VLT-DSM is convex and calibration of the interaction matrix (IM) between the PWM and the DSM is not foreseen on-telescope during day-time. In this paper different options of calibration are evaluated and compared with particular attention on the synthetic evaluation and on-sky calibration of the IM. A trade-off of the calibration options, the optimization techniques and the related validation with numerical simulations are also provided.

Paper Details

Date Published: 13 September 2012
PDF: 12 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84475M (13 September 2012); doi: 10.1117/12.927122
Show Author Affiliations
A. Riccardi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
R. Briguglio, INAF - Osservatorio Astrofisico di Arcetri (Italy)
E. Pinna, INAF - Osservatorio Astrofisico di Arcetri (Italy)
G. Agapito, INAF - Osservatorio Astrofisico di Arcetri (Italy)
F. Quiros-Pacheco, INAF - Osservatorio Astrofisico di Arcetri (Italy)
S. Esposito, INAF - Osservatorio Astrofisico di Arcetri (Italy)


Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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