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Proceedings Paper

A simple and efficient model for polychromatic focal plane wave-front sensor
Author(s): S. Dandy; J.-F. Sauvage; T. Fusco; L. Mugnier
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Paper Abstract

Phase Diversity is a focal-plane technique which is chromatic by nature. The use of a monochromatic model on wide-band imaging results of an additional error function of the spectral range.We present here a second order modeling of the focal plane wave-front sensing error due to wide-band imaging and propose a first order correction by inverse problem and the first results of an end-to-end simulation for an iterative correction. Simulation results of 20 nm wave-front aberrations show that the reconstruction error decreases from 10 nm with classical focal-plane sensor to sub-nanometric error with optimal correction at Δλ = 500 nm.

Paper Details

Date Published: 28 July 2010
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 773629 (28 July 2010); doi: 10.1117/12.857226
Show Author Affiliations
S. Dandy, ONERA (France)
J.-F. Sauvage, ONERA (France)
T. Fusco, ONERA (France)
L. Mugnier, ONERA (France)

Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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