Characterization of synthetic reconstructors for the pyramid wavefront sensor unit of LBTI

V. Bailey; V. Vaitheeswaran; J. Codona; P. Hinz; O. Durney; S. Esposito; E. Pinna; A. Puglisi

doi:10.1117/12.857457

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28 July 2010 Characterization of synthetic reconstructors for the pyramid wavefront sensor unit of LBTI

V. Bailey; V. Vaitheeswaran; J. Codona; P. Hinz; O. Durney; S. Esposito; E. Pinna; A. Puglisi

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Proceedings Volume 7736, Adaptive Optics Systems II; 77365G (2010) https://doi.org/10.1117/12.857457
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

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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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