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Applied Optics

Applied Optics


  • Vol. 26, Iss. 10 — May. 15, 1987
  • pp: 2011–2015

Astronomical speckle masking: image reconstruction by cross triple correlation

K.-H. Hofmann and G. Weigelt  »View Author Affiliations

Applied Optics, Vol. 26, Issue 10, pp. 2011-2015 (1987)

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Speckle masking is a speckle method that is capable of reconstructing true diffraction-limited images from astronomical speckle interferograms. Image degradation caused by the atmosphere and by telescope aberrations can be overcome completely. Speckle masking is a solution of the phase problem in speckle interferometry. We propose a new, modified version of speckle masking that is based on cross triple correlation processing (or cross bispectrum processing) instead of autotriple correlation processing. The advantage of cross triple correlation processing is the fact that undesired photon bias terms in the average bispectrum of the speckle interferograms are overcome completely. We show computer simulations (astronomical magnitude of ~16m) that illustrate the feasibility of the method.

© 1987 Optical Society of America

Original Manuscript: October 31, 1986
Published: May 15, 1987

K.-H. Hofmann and G. Weigelt, "Astronomical speckle masking: image reconstruction by cross triple correlation," Appl. Opt. 26, 2011-2015 (1987)

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