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Proceedings Paper

Image reconstruction from the bispectrum using an iterative algorithm and applications of the method to astronomical objects
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Paper Abstract

The atmosphere of the earth restricts the resolution of conventional astrophotography to~1 arc- sec. Much higher resolution can be obtained by interferometric speckle techniques. Bispectrum analysis1-3 (also called speckle masking) of many speckle interferograms (short-exposure photographs; exposure time ~0.05sec) yields diffraction-limited images with, for example, 0.02arcsec resolution for a 5-m telescope. After the first processing steps of speckle masking the object bispectrum O(3)(u,v) is obtained up to the cut-off frequency of the telescope.

Paper Details

Date Published: 1 November 1990
PDF: 4 pages
Proc. SPIE 1351, Digital Image Synthesis and Inverse Optics, (1 November 1990); doi: 10.1117/12.23661
Show Author Affiliations
Karl-Heinz Hofmann, Max-Planck-Institut fuer Radioastronomie (Germany)
Gerd Weigelt, Max-Planck-Institut fuer Radioastronomie (Germany)

Published in SPIE Proceedings Vol. 1351:
Digital Image Synthesis and Inverse Optics
Arthur F. Gmitro; Paul S. Idell; Ivan J. LaHaie, Editor(s)

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