  Doubts regarding the completeness of quantum mechanics as raised by Einstein,
Podolsky and Rosen(EPR) have predominantly been resolved by resorting to a
measurement of correlations between entangled photons which clearly demonstrate
violation of Bell's inequality. This article is an attempt to reconcile
incompatibility of hidden variable theories with reality by demonstrating
experimentally a violation of Bell's inequality in locally correlated systems
whose two degrees of freedom, the spin and orbital angular momentum, are
maximally correlated. To this end we propose and demonstrate a linear,
achromatic modified Sagnac interferometer to project orbital angular momentum
states which we combine with spin projections to measure correlations.
