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Proceedings Paper

LIFT, a noise-effective low order focal-plane sensor: from theory to full experimental validation
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Paper Abstract

Laser Tomographic systems, such as ATLAS, will rely on natural guide stars to sense low order aberrations. LIFT is a novel focal plane wavefront sensor (WFS), performing a maximum likelihood phase retrieval on a single image, with better sensitivity than a 2x2 Hartmann-Shack WFS. We first present a characterization of LIFT’s noise propagation performance and working domain by means of simulations. We then show the results of experiments on ONERA’s test bench for LIFT. These experiments validate the estimation of tip/tilt and focus, in monochromatic light and in large bandwidth (for a spectral resolution of 3), as well as the expected noise propagation. They also confirm the validity of the imaging models used for simulations. Finally, we focus on the preparation of an on-sky validation based on Gemini Multi-conjugate adaptive optics System (GeMS) calibration data at Gemini Southern Observatory.

Paper Details

Date Published: 13 September 2012
PDF: 12 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84471O (13 September 2012); doi: 10.1117/12.926895
Show Author Affiliations
Cédric Plantet, ONERA (France)
Benoit Neichel, Gemini Southern Observatory (Chile)
Serge Meimon, ONERA (France)
Thierry Fusco, ONERA (France)
Jean-Marc Conan, ONERA (France)

Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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