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

Karl-Heinz Hofmann; Gerd Weigelt

doi:10.1117/12.23661

1 November 1990 Image reconstruction from the bispectrum using an iterative algorithm and applications of the method to astronomical objects

Karl-Heinz Hofmann, Gerd Weigelt

Author Affiliations +

Proceedings Volume 1351, Digital Image Synthesis and Inverse Optics; (1990) https://doi.org/10.1117/12.23661
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

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.

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Karl-Heinz Hofmann and Gerd Weigelt "Image reconstruction from the bispectrum using an iterative algorithm and applications of the method to astronomical objects", Proc. SPIE 1351, Digital Image Synthesis and Inverse Optics, (1 November 1990); https://doi.org/10.1117/12.23661

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