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18 September 2007 Space variant point spread function modeling for astronomical image data processing
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This paper deals with evaluation and processing of astronomical image data, which are obtained by WFC (Wide-Field Camera) or UWFC (Ultra Wide-Field Camera) systems. Precision of astronomical image data post-processing and analyzing is very important. Large amount of different kinds of optical aberrations and distortions is included in these systems. The amplitude of wavefront aberration error increases towards margins of the FOV (Field of View). Relation between amount of high order optical aberrations and astrometry measurement precision is discussed in this paper. There are descriptions of the transfer characteristics of astronomical optical systems presented in this paper. Spatially variant (SV) optical aberrations negatively affect the transfer characteristics of all system and make it spatially variant as well. SV model of optical system is presented in this paper. Partially invariant model of optical systems allows using Fourier methods for deconvolution. Some deconvolution results are shown in this paper.
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Martin Řeřábek, Petr Páta, Karel Fliegel, Jan Švihlik, and Pavel Koten "Space variant point spread function modeling for astronomical image data processing", Proc. SPIE 6691, Astronomical Adaptive Optics Systems and Applications III, 66910T (18 September 2007);

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