13 September 2012 Calibration strategy of the pyramid wavefront sensor module of ERIS with the VLT deformable secondary mirror
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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.
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A. Riccardi, A. Riccardi, R. Briguglio, R. Briguglio, E. Pinna, E. Pinna, G. Agapito, G. Agapito, F. Quiros-Pacheco, F. Quiros-Pacheco, S. Esposito, 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); doi: 10.1117/12.927122; https://doi.org/10.1117/12.927122
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