Fig. 8.

STOC manipulation controls the extent of the spatial coherence by varying the SLM block size $R$. (a) For $R\le 4\times 4$, the intensity images do not change significantly. Contrary, for $R>4\times 4$, an additional regular, dark pattern appears. This pattern is due to diffraction from edges of the phase mask blocks. (b) The coherence area, which corresponds to the diagonal thickness of the scattering coherency matrix, starts to increase for $R>4\times 4$ due to larger spatial blocks that are manipulated. Larger blocks reduce the number of controllable degrees of freedom. (c) This behavior is also confirmed through intensity distributions, which become wider for $R=6\times 6$ and $R=8\times 8$. Red rectangles in subfigure (a) denote the region of interest which was used to determine matrix $G$ and intensity distributions.