Application Of Bispectrum Analysis To Infrared Speckle Data

Julian C. Christou; Jonathan D. Freeman; Francois Roddier; Donald W. McCarthy Jr.; Michael L. Cobb; Stuart B. Shaklan

doi:10.1117/12.942076

29 January 1988 Application Of Bispectrum Analysis To Infrared Speckle Data

Julian C. Christou, Jonathan D. Freeman, Francois Roddier, Donald W. McCarthy Jr., Michael L. Cobb, Stuart B. Shaklan

Proceedings Volume 0828, Digital Image Recovery and Synthesis; (1988) https://doi.org/10.1117/12.942076
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

We have applied the bispectrum algorithm to one-dimensional infrared speckle data for retrieval of diffraction limited phases. We use a standard weighting averaging technique to combine the multiple phase estimates contained in the bispectrum. We have also used the bispectrum modulus to obtain visibility amplitudes. Results, including images, are presented for three different binary stars. Simulated data has also been used to study the behaviour of the algorithm under different signal-to-noise conditions as well as a study of phase recovery for different defocus conditions. We find that the algorithm is sensitive, at a low level, to focus changes especially for noisy data. Comparison of the bispectrum phases is made with those obtained from Knox-Thompson cross-spectra for all cases.

Citation Download Citation

Julian C. Christou, Jonathan D. Freeman, Francois Roddier, Donald W. McCarthy Jr., Michael L. Cobb, and Stuart B. Shaklan "Application Of Bispectrum Analysis To Infrared Speckle Data", Proc. SPIE 0828, Digital Image Recovery and Synthesis, (29 January 1988); https://doi.org/10.1117/12.942076

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