Long exposure Point Spread Function estimation from Adaptive Optics loop data

Document Type

Conference Proceeding

Publication Date

12-1-2004

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.

Identifier

11144303601 (Scopus)

Publication Title

Proceedings of SPIE the International Society for Optical Engineering

External Full Text Location

https://doi.org/10.1117/12.551954

ISSN

0277786X

First Page

184

Last Page

194

Issue

PART 1

Volume

5490

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