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Proceedings Paper

Optimization of center of gravity algorithms in a Shack-Hartmann sensor
Author(s): T. Fusco; S. Thomas; M. Nicolle; A. Tokovinin; V. Michau; G. Rousset
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Paper Abstract

We propose analytical studies supported by simulation of various centroiding algorithms for Shack-Hartmann based wavefront sensor. We focused on the simple center of gravity as well as one of its optimization, the weighted center of gravity. Noise effects, as well as linearity issues and high flux bias induced by sub-aperture size and PSF structures are investigated. For each method, optimal parameters are defined in function of photon flux, readout noise, and turbulence level.

Paper Details

Date Published: 28 June 2006
PDF: 11 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 627219 (28 June 2006); doi: 10.1117/12.670811
Show Author Affiliations
T. Fusco, ONERA (France)
S. Thomas, Cerro Tololo Inter-American Observatories (Chile)
M. Nicolle, ONERA (France)
A. Tokovinin, Cerro Tololo Inter-American Observatories (Chile)
V. Michau, ONERA (France)
G. Rousset, ONERA (France)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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