Phase error in bispectral stellar speckle imaging

Julian Meng; George J. M. Aitken

doi:10.1117/12.162004

9 November 1993 Phase error in bispectral stellar speckle imaging

Julian Meng, George J. M. Aitken

Proceedings Volume 2029, Digital Image Recovery and Synthesis II; (1993) https://doi.org/10.1117/12.162004
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Julian Meng and George J. M. Aitken "Phase error in bispectral stellar speckle imaging", Proc. SPIE 2029, Digital Image Recovery and Synthesis II, (9 November 1993); https://doi.org/10.1117/12.162004

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KEYWORDS

Signal to noise ratio

Speckle

Image restoration

Contrast transfer function

Image processing

Telescopes

Modeling

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