arrangements and methods for the design of a hybrid optical / electronic system that implements logic or computing functions . the system consists of a programmable hybrid optical / electronic invert - or - invert - or logic array that is functionally equivalent to a conventional and - or electronic programmable logic array device with decoders . in the hybrid system , electronic decoders send spatially coded binary input information to a row of optical emitters . a programmable optical crossbar is then employed to perform a row by row invert - or operation . light emerging from the crossbar impinges on a column of optical detectors , and the individual detector outputs are subsequently inverted electronically . one or more of the resulting signals are then electronically or optically or &# 39 ; d together .