Spatial spectrum (diffraction halo) of fourier specklegram of scattering object
B.B. Gorbatenko, A.A. Grebenyuk, L.A. Maksimova, V.P. Ryabukho

Saratov State Technical University,
Saratov State University,

Institute of Precision Mechanics and Control RAS

Full text of article: Russian language.

The phenomenological theory of spatial spectrum (diffraction halo) of fourier-specklegram of scattering object is presented. It is shown, that distribution of average intensity of field in diffraction halo is determined by autocorrelation function of average intensity distribution on object surface. Influence of object aperture form is included. Results of natural experiments and numerical simulation are presented. They confirm validity of offered theory of diffraction halo formation.

Key words:
speckle-pattern, diffraction, diffraction halo, fourier specklegram, spatial spectrum, autocorrelation.


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