Coincidence Imaging with Thermal Coincidence Imaging with Thermal

Entangled photon pairs or biphotons produced by spontaneous parametric down conversion (SPDC) have the most striking features of quantum mechanics. These photons have been used for coincidence interference and coincidence (ghost) imaging due to its nonlocal features. Basically, the coincidence imaging experimental configuration is based on splitting the light beam into two spatially separated optical arms where an object is placed in one of the arms (object arm) and the other one is called reference arm. Classically correlated light radiation (or pseudo-thermal) might mimic some features of the entangled photon pairs. Thermal light coincidence imaging in reflection and transmission mode has been demonstrated. The formation of the image does not require any imaging lens or equivalent system. Therefore this technique may work for any wavelength of radiation.