  We propose a new scheme to achieve sub-Rayleigh resolution of interference
pattern with independent laser beams. We perform an experimental observation of
a double-slit interference with two orthogonally polarized laser beams. The
resolution of the interference pattern measured by a two-photon detection is
doubled provided the two beams illuminate the double-slit with certain incident
angles. The scheme is simple and can be in favor of both high intensity and
perfect visibility.
