The mapping of complex-valued functions onto phase-only spatial light modulators is examined. Random phase encoding effectively adds amplitude control to the phase-only filter and can be used to trade off systematic errors of the phase-only filter for random errors. This is illustrated for the problem of recognizing a three-dimensional object from arbitrary views. The complex-valued composite filters that constitute a filter bank design are encoded by phase-only and pseudorandom methods. The best recognition probabilities are achieved by blending the two methods so that only the smallest amplitudes are randomly encoded.
© 1996 Optical Society of America
Original Manuscript: July 31, 1995
Published: February 15, 1996
Laurence G. Hassebrook, Robert W. Cohn, Minhua Liang, Michael E. Lhamon, and Raymond C. Daley, "Random phase encoding of composite fully complex filters," Opt. Lett. 21, 272-274 (1996)