Visibility enhancement in two-dimensional lensless ghost imaging with true thermal light
Chen Xi-Hao1, †, Yan Ling1, Wu Wei1, Meng Shao-Ying1, ‡, Wu Ling-An2, Sun Zhi-Bin3, Wang Chao3, Zhai Guang-Jie3
       

(color online) Schematic diagram of the experimental setup. EDL, electrodeless discharge lamp; PBS, polarized beamsplitter; BS, beamsplitter; Ci (i = 1, 2), fiber collimators; APDi (i = 1, 2), single-photon detectors. See text for an explanation of other elements.