  We present the preliminary results on direct photon interferometry
measurements in Au+Au collisions at $\sqrt{s_{\rm{NN}}}$ = 62.4 and 200 GeV
using the STAR (Solenoidal Tracker at RHIC) detector. Photons are reconstructed
via $e^+/e^-$ conversions in STAR Time Projection Chamber(TPC) and energy
deposited by photons in STAR Barrel Electromagnetic Calorimeter(BEMC). The
two-photon correlations are measured using (1) both photons measured using
BEMC; (2) one photon from conversions and the other measured with BEMC. Both
the methodologies and the possible constraints in the correlation function
measurements are discussed.
