Fig. 3
From: Passive sensing around the corner using spatial coherence
“Glitter path” effect in reflection from random media. a Experimental values of the normalized spatial coherence for in-plane s|| and off-plane s⊥ shear corresponding to 80° incidence angle. b Experimental and simulated values of the off-plane coherence length \(l_{\mathrm c}^ \bot\) as a function of the angle of incidence θ. Both the source and detection system are located 1 m away from the multiple-scattering wall. The procedure of measurement is detailed in Supplementary Note 3. The solid line represents the Monte Carlo fit to the experimental data from which the average slope of the surface roughness was estimated to be σ = 0.07 rad. The dashed line is the corresponding analytical expression \(l_{\mathrm c}^ \bot \propto \left( {\sigma \cos \theta } \right)^{ - 1}\). The coherence length (half-width at half-maximum of SCF) of the field incident on the wall is 132 µm. The error bars represent the standard deviation of four independent measurements of coherence length
