Fig. 7
From: Optical coherence encryption with structured random light
Robustness of the coherence-based encryption in the face of thermally induced turbulence modelling the atmospheric turbulence. a The schematics of a 2f imaging system in the presence of thermally induced turbulence. b The experimental results for the cross-spectral density of the illuminating beam and the corresponding recovered image in the turbulence free situation for reference. c–f The experimental results for the cross-spectral density of the illuminating beam and the corresponding recovered images in the presence of thermally induced turbulence with the temperature T of the hot graphitic plate being 100∘C,150∘C,200∘C, and 250∘C, respectively. The scale bars are shown in panel (f)