17 October 1997 Improved technique for centroiding in Shack-Hartmann sensing at low light level
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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.
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Jean-Marc Ruggiu, Jean-Marc Ruggiu, Christopher J. Solomon, Christopher J. Solomon, "Improved technique for centroiding in Shack-Hartmann sensing at low light level", Proc. SPIE 3126, Adaptive Optics and Applications, (17 October 1997); doi: 10.1117/12.290170; https://doi.org/10.1117/12.290170
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