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

A. Riccardi; R. Briguglio; E. Pinna; G. Agapito; F. Quiros-Pacheco; S. Esposito

doi:10.1117/12.927122

13 September 2012 Calibration strategy of the pyramid wavefront sensor module of ERIS with the VLT deformable secondary mirror

A. Riccardi, R. Briguglio, E. Pinna, G. Agapito, F. Quiros-Pacheco, S. Esposito

Author Affiliations +

Proceedings Volume 8447, Adaptive Optics Systems III; 84475M (2012) https://doi.org/10.1117/12.927122
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

Citation Download Citation

A. Riccardi, R. Briguglio, E. Pinna, G. Agapito, F. Quiros-Pacheco, and S. Esposito "Calibration strategy of the pyramid wavefront sensor module of ERIS with the VLT deformable secondary mirror", Proc. SPIE 8447, Adaptive Optics Systems III, 84475M (13 September 2012); https://doi.org/10.1117/12.927122

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