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Proceedings Paper

Improved technique for centroiding in Shack-Hartmann sensing at low light level
Author(s): Jean-Marc Ruggiu; Christopher J. Solomon
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Paper Abstract

A study has been made of a Shack-Hartman sensor utilising a Charge Coupled Device (CCD) array and of an alternative approach to estimating the centroid. This is based on modelling the Point Spread Function (PSF) by a Gram-Charlier type expansion type, we will present results for different levels of Kolmogorov turbulence with and without CCD read noise. Our high-fidelity computer simulation demonstrates that more accurate estimation of the PSF centroid may be achieved at low light level as compared to the standard center of gravity estimation.

Paper Details

Date Published: 17 October 1997
PDF: 6 pages
Proc. SPIE 3126, Adaptive Optics and Applications, (17 October 1997); doi: 10.1117/12.290170
Show Author Affiliations
Jean-Marc Ruggiu, Univ. of Kent at Canterbury (United Kingdom)
Christopher J. Solomon, Univ. of Kent at Canterbury (United Kingdom)


Published in SPIE Proceedings Vol. 3126:
Adaptive Optics and Applications
Robert K. Tyson; Robert Q. Fugate, Editor(s)

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