@inproceedings{ee5742e01f2c451780ebd32b79e25629,
title = "Ultra-high sensitivity wavefront sensing for extreme-AO",
abstract = "A new wavefront sensing scheme derived from curvature wavefront sensing is presented. Non-linear Curvature wavefront sensing (NLCWFS) is a scheme derived from conventional curvature wavefront sensing. NLCWFS uses four defocused pupil images and a non-linear wavefront reconstruction. NLCWFS is largely achromatic and does not require a flat (<1 rad RMS) wavefront to operate: it is therefore very robust, and is an attractive alternative to less efficient Shack-Hartmann wavefront sensing. For low order aberrations, sensitivity gains corresponding to 5 and 8 stellar magnitudes can be achieved over the conventional Shack-Hartmann sensor on respectively a 8-mtelescope and a 30-m telescope.",
keywords = "Adaptive Optics, Coronagraphy",
author = "Olivier Guyon",
year = "2008",
doi = "10.1117/12.790170",
language = "English (US)",
isbn = "9780819472250",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Adaptive Optics Systems",
note = "Adaptive Optics Systems ; Conference date: 23-06-2008 Through 26-06-2008",
}