First light AO system for LBT: toward on-sky operation

S. Esposito; A. Tozzi; A. Puglisi; E. Pinna; A. Riccardi; S. Busoni; L. Busoni; P. Stefanini; M. Xompero; D. Zanotti; F. Pieralli

doi:10.1117/12.673509

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27 June 2006 First light AO system for LBT: toward on-sky operation

S. Esposito, A. Tozzi, A. Puglisi, E. Pinna, A. Riccardi, S. Busoni, L. Busoni, P. Stefanini, M. Xompero, D. Zanotti, F. Pieralli

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Proceedings Volume 6272, Advances in Adaptive Optics II; 62720A (2006) https://doi.org/10.1117/12.673509
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

The paper is describing the present status of the LBT first light AO system. The system design started in January 2002 and is now approaching the final test in the Arcetri solar tower. Two key features of this single conjugate AO system are the use of an adaptive secondary mirror having 672 actuators and a pyramid wavefront sensor with a maximum sampling of 30x30 subapertures. The paper is reporting about the adaptive secondary mechanical electrical and optical integration, and the wavefront sensor unit integration and acceptance test. Finally some lab test of the AO system done using an adaptive secondary prototype with 45 actuators, the so called P45 are described. The aim of these test was to get an estimate of the system limiting magnitude and to demonstrate the feasibility of a new technique able to measure AO system interaction matrix in a shortest time and with higher SNR with respect to the classical interaction matrix measurement. We are planning to use such a technique to calibrate the AO system in Arcetri and later at the LBT telescope.

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S. Esposito, A. Tozzi, A. Puglisi, E. Pinna, A. Riccardi, S. Busoni, L. Busoni, P. Stefanini, M. Xompero, D. Zanotti, and F. Pieralli "First light AO system for LBT: toward on-sky operation", Proc. SPIE 6272, Advances in Adaptive Optics II, 62720A (27 June 2006); https://doi.org/10.1117/12.673509

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