Ruggiu, J.M. and Solomon, C.J. (1997) Improved technique for centroiding in Shack-Hartmann sensing at low light level. In: Tyson, R.K. and Fugate, R.Q., eds. Adaptive Optics and Applications. SPIE Proceedings . Spie - Int Soc Optical Engineering, pp. 545-550. ISBN 0-8194-2548-6.
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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.
| Item Type: | Book section |
|---|---|
| Additional information: | Conference on Adaptive Optics and Applications SAN DIEGO, CA, JUL 30-AUG 01, 1997 |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences > Optics |
| Depositing User: | T.J. Sango |
| Date Deposited: | 18 May 2009 08:17 |
| Last Modified: | 18 May 2009 08:17 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/17920 (The current URI for this page, for reference purposes) |
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