Speckle correlations around the backscattering direction in the double-passage configuration

Experimental results are presented for the angular correlation function of far-field speckle patterns scattered in the double passage of waves through a one-dimensional random-phase screen. The theoretical analysis of the symmetry of speckle patterns around the backscattering direction and the motion of the speckle as the source is moved, made by Escamilla et al. Appl. Opt. 32, 2734 (1993)], are verified in this paper.