1 November 1990 Image reconstruction from the bispectrum using an iterative algorithm and applications of the method to astronomical objects
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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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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); doi: 10.1117/12.23661; https://doi.org/10.1117/12.23661
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