Top: Experimental setup involving an optical beam with variable spatial coherence prepared by collimating the light scattered from a rotating holographic diffuser plate. Bottom: Three intensity profiles, obtained by stopping the plate rotation. Coherence decreases from left to right.
From the article:
Spatial Coherence and Optical Beam ShiftsW. Löffler, Andrea Aiello, and J. P. Woerdman
Phys. Rev. Lett. 109, 213901 (2012)
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