The influence of source and object characteristics on coincidence imaging

A classical coincidence imaging or ghost imaging experiment is carried out in a two-photon counting regime using a pseudo-thermal incoherent light source. The effect of the transverse size and transverse coherence width of the source on the visibility and the resolution of the reconstructed ghost image is studied. It is observed that by increasing the transverse size of the source, the resolution (quality) of the reconstructed image improves, while the visibility reduces. On the other hand, as the coherence width of the source increases, the visibility of the image increases but the resolution becomes poor. The effect of object characteristics on the visibility of the ghost image is also studied and it is found that by increasing the number of transparent features and the surface size of the object, the visibility of the image decreases. These experimental results validate the theoretical results published so far.