Imaging using fourth-order correlations of coherent fields

Details Imaging using fourth-order correlations of coherent fields Imaging using fourth-order correlations of coherent fields

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.2029..185g&link_type=abstract

Proc. SPIE Vol. 2029, p. 185-191, Digital Image Recovery and Synthesis II, Paul S. Idell; Ed.

Physics

Scientific paper

Correlations of coherent backscatter intensities have been used to form Fourier spectra of coherently illuminated objects. Both second and some fourth-order correlations have been studied. We add to this by describing a new method using fourth order field correlations for imaging. If one knows the actual object speckle field, or certain sheared versions of it, then it is possible through fourth-order correlations to obtain the incoherent brightness function of the object. The technique will allow simultaneous averaging-out of both field phase distortions, certain field measurement noises, and laser speckle.

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