  We report the first observation of Hong-Ou-Mandel (HOM) interference of
highly indistinguishable photon pairs with spatial resolution. Direct imaging
of two-photon coalescence with an intensified sCMOS camera system clearly
reveals spatially separated photons appearing pairwise within one of the two
modes. With the use of the camera system we quantified the number of pairs and
recovered the full HOM dip yielding 96.3% interference visibility, as well as
retrieved the number of coalesced pairs. We retrieved the spatial mode
structure of both interfering photons by performing a proof-of-principle
demonstration of a new, low noise high resolution coincidence imaging scheme.
