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Proceedings Paper

Space variant point spread function modeling for astronomical image data processing
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Paper Abstract

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.

Paper Details

Date Published: 18 September 2007
PDF: 10 pages
Proc. SPIE 6691, Astronomical Adaptive Optics Systems and Applications III, 66910T (18 September 2007); doi: 10.1117/12.738492
Show Author Affiliations
Martin Řeřábek, Czech Technical Univ. in Prague (Czech Republic)
Petr Páta, Czech Technical Univ. in Prague (Czech Republic)
Karel Fliegel, Czech Technical Univ. in Prague (Czech Republic)
Jan Švihlik, Czech Technical Univ. in Prague (Czech Republic)
Pavel Koten, Astronomical Institute (Czech Republic)


Published in SPIE Proceedings Vol. 6691:
Astronomical Adaptive Optics Systems and Applications III
Robert K. Tyson; Michael Lloyd-Hart, Editor(s)

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