Physics – Optics
Scientific paper
Feb 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..142..149f&link_type=abstract
Astronomy and Astrophysics Supplement, v.142, p.149-156
Physics
Optics
19
Instrumentation: Adaptive Optics, Techniques: Miscellaneous, Astrometry, Methods: Observational
Scientific paper
The point spread function (PSF) of an adaptive optics system evolves in the Field Of View (FOV). This variation strongly limits the conventional deconvolution methods for the processing of wide FOV images. A theoretical expression of this PSF variation is derived. This expression is both validated on simulations and experimental data. It is then applied to the a posteriori processing of stellar fields. Using the available prior information about the object (point-like sources), this technique allows the restoration of the star parameters (positions and intensities) with a precision much better than the conventional methods, in a FOV much larger than the isoplanatic field.
Conan Jean-Marc
Fusco Th.
Michau Vincent
Mugnier Laurent M.
Rousset Gabriel
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