Abstract

The binary symmetric logic function (BSLF), because of its functional invariance under the permutation of input variables, is an important class of Boolean logic operation. The diversified BSLF applications include the realization of full adder, subtractor, parity checker, text comparator, binary medium filter, and binary-weighted threshold elements. We propose optical implementations of multiple-variable BSLFs. Using a triangular array of lossless beam splitters together with optical on/off switches, an optical binary symmetric logic module (OBSLM) is experimentally implemented. The applications of the OBSLM to optical digital, symbolic, and neural computing are discussed.

© 1988 Optical Society of America