Ruggiu, J.M. and Solomon, C.J. and Loos, G. (1998) Gram-Charlier matched filter for Shack-Hartmann sensing at low light levels. Optics Letters, 23 (4). pp. 235-237. ISSN 0146-9592.
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A study has been made of a Gram-Charlier matched filter for Shack-Hartmann sensing of wave-front slopes. The method is based on modeling the point-spread function by an expansion in terms of Gauss-Hermite polynomials. We present results for several subaperture/coherence area sizes both with and without CCD read noise. A more accurate estimation of the local slopes can be. achieved at low light levels in this way than with the standard first-moment estimator.
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunications > TK5103.59 Optical communications, Fibre-optics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Optics
Faculties > Science Technology and Medical Studies > School of Physical Sciences
|Depositing User:||Tara Puri|
|Date Deposited:||04 Jul 2009 12:32|
|Last Modified:||04 Jul 2009 12:32|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/17074 (The current URI for this page, for reference purposes)|
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