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Proceedings Paper

Long-exposure point spread function estimation from adaptive optics loop data
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Paper Abstract

Adaptive Optics (AO) systems provide real time correction for atmospherical aberrations. They have become an indispensable tool for ground based astronomical observations. However, correction provided by AO is only partial. Further correction can be achieved using post-processing techniques. Post-processing techniques such as deconvolution rely on a good estimation of the long exposure Point Spread Function (PSF). In the case of Solar Physics obtaining a long exposure PSF can be particularly difficult due to the lack of point sources in the field of view and the highly variable seeing conditions. We present a method to estimate the long exposure PSF of an AO corrected image using AO loop data. AO closed loop data provides enough information about the residual aberrations that were not corrected by the system and about the seeing conditions present at a certain time. With this information an estimated long exposure PSF can be constructed for each captured image. The PSF can be used to deconvolve the images. We will be presenting first results of applying this method to solar images.

Paper Details

Date Published: 25 October 2004
PDF: 11 pages
Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); doi: 10.1117/12.551954
Show Author Affiliations
Jose Marino, New Jersey Institute of Technology (United States)
Thomas R. Rimmele, National Solar Observatory (United States)
Julian C. Christou, Univ. of California/Santa Cruz (United States)

Published in SPIE Proceedings Vol. 5490:
Advancements in Adaptive Optics
Domenico Bonaccini Calia; Brent L. Ellerbroek; Roberto Ragazzoni, Editor(s)

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