Abstract
A fibrous radial structure of speckle patterns produced at the far-field diffraction plane by various diffuse objects under illumination of polychromatic light is studied theoretically and experimentally by means of the spatial correlation function of the speckle intensity. It is shown that the fibrous radial structure of speckle patterns strongly depends on both the surface roughness of diffuse objects under illumination and the radial distance from the center of patterns at the far-field diffraction plane.
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