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28 July 2010 Characterization of synthetic reconstructors for the pyramid wavefront sensor unit of LBTI
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Abstract
We present progress and results for the pyramid wavefront sensor unit on the Large Binocular Telescope's Interferometer (LBTI). The system is a clone of the pyramid sensor unit developed at Arcetri Observatory for the LUCIFER instrument. We discuss the performance of simulated reconstructors during preliminary on-sky testing at the MMT. These reconstructors were generated with the code AOSim2, a customizable end-to-end simulator of a telescope and its AO system. We used the 3-5μm imager Clio to take fast exposures at 3.8μm, from which we calculated Strehl Ratios (SR) for each pyramid configuration and for the Shack-Hartmann (SH) system currently installed. We obtained instantaneous SR as high as 60% for the pyramid as compared to 65% mean for the SH.We identify improvements which will increase the SR in future implementations. These tests demonstrate the feasibility of commissioning a pyramid wavefront sensor on LBTI using a synthetic reconstructor.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
V. Bailey, V. Vaitheeswaran, J. Codona, P. Hinz, O. Durney, S. Esposito, E. Pinna, and A. Puglisi "Characterization of synthetic reconstructors for the pyramid wavefront sensor unit of LBTI", Proc. SPIE 7736, Adaptive Optics Systems II, 77365G (28 July 2010); https://doi.org/10.1117/12.857457
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