RANDOM MASK ENCODING OF MULTIPLEXED PHASE-ONLY AND BINARY PHASE-ONLY FILTERS

In the formation of multiplexed filters, the phase-only and binary pha se-only operations result in spurious cross terms and a nonlinear scal ing. We use complementary random binary patterns having different patt ern densities to encode the various functions within the multiplexed f unction. The orthogonality of these complementary masks permits separa bility of the phase-only or binary phase-only operations. By changing the pixel density of the random pattern, we can easily change the rela tive weights of the functions that compose the multiplexed filter. Exp erimental results are shown that demonstrate the effectiveness of this approach.