A new method to realize a medium-scale, free-space optical programmable logic array is proposed. By using either a two-dimensional optical spatial light modulator or an array of one-dimensional spatial light modulators inside a lens-based multiple-beam-path cavity, an array of optical multiple-variable logic product terms is generated. This device, together with a programmable multiple-variable or matrix, can be used to implement any Boolean combinatorial logic operations. For an optical binary combinatorial logic computation, the proposed method efficiently uses three-dimensional space and optical elements. Preliminary experimental results obtained using an inexpensive liquid-crystal television are included.
© 1988 Optical Society of America
Original Manuscript: March 10, 1988
Manuscript Accepted: June 22, 1988
Published: October 1, 1988
Yao Li, Andrew Kostrzewski, Dai Hyun Kim, and George Eichmann, "Free-space folded-path optical programmable logic array," Opt. Lett. 13, 895-897 (1988)