Phase error in bispectral stellar speckle imaging

Details Phase error in bispectral stellar speckle imaging Phase error in bispectral stellar speckle imaging

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.2029..264m&link_type=abstract

Proc. SPIE Vol. 2029, p. 264-274, Digital Image Recovery and Synthesis II, Paul S. Idell; Ed.

Computer Science

Scientific paper

The recovery of a stellar object's Fourier phase from the bispectrum of the atmospherically- degraded images has been investigated with respect to object complexity, a wide range of light levels, severity of the atmospheric effects and the number of bispectral subplanes used. The incremental improvement in the quality of the recovered phase as the number of near-axis subplanes increases is greatest for complex sources and when photon-noise dominates. At high signal-to-noise ratios it was found that the extended Knox-Thompson transfer function has a higher phase variance than the bispectral transfer function. Analysis has confirmed this difference in behavior.

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