27 July 2010 First light AO (FLAO) system for LBT: performance analysis and optimization
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Abstract
We will present in this paper the performance analysis and optimization of the First Light AO (FLAO) system of the Large Binocular Telescope (LBT). The system comprises an adaptive secondary mirror (ASM) with 672 actuators (LBT672a unit) and a pyramid wavefront sensor (PWFS) with adjustable sampling of the telescope pupil from 30×30 down to 4×4 subapertures. The performances have been estimated by means of end-to-end simulations, scanning a range of reference star magnitudes and looking for the optimal set of parameters maximizing the on-axis Strehl Ratio. Specific additional error sources have been accounted for and analyzed separately, such as mis-registration errors, mis-calibration issues, and the effect of telescope vibrations. Taking into account the considered error sources we defined the baseline and goal performances of the FLAO system. The acceptance test of the FLAO system took place in December 2009, demonstrating actual FLAO performances between baseline and goal estimates. The commissioning of the FLAO system to the LBT telescope is currently ongoing until December 2010.
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Fernando Quirós-Pacheco, Fernando Quirós-Pacheco, Lorenzo Busoni, Lorenzo Busoni, Guido Agapito, Guido Agapito, Simone Esposito, Simone Esposito, Enrico Pinna, Enrico Pinna, Alfio Puglisi, Alfio Puglisi, Armando Riccardi, Armando Riccardi, } "First light AO (FLAO) system for LBT: performance analysis and optimization", Proc. SPIE 7736, Adaptive Optics Systems II, 77363H (27 July 2010); doi: 10.1117/12.858208; https://doi.org/10.1117/12.858208
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