Improved technique for centroiding in Shack-Hartmann sensing at low light level

Jean-Marc Ruggiu; Christopher J. Solomon

doi:10.1117/12.290170

17 October 1997 Improved technique for centroiding in Shack-Hartmann sensing at low light level

Jean-Marc Ruggiu, Christopher J. Solomon

Proceedings Volume 3126, Adaptive Optics and Applications; (1997) https://doi.org/10.1117/12.290170
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Jean-Marc Ruggiu and 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); https://doi.org/10.1117/12.290170

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