Array of logic XNOR gates and its application to the optical implementation of neural networks
Hongchen Zhai, Ruediger Jaspert, Stefan Schlier, Dieter Jaeger · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1990
We report, for the first time, a simple method using an array of logic XNOR gates to execute the optical process of vector-matrix multiplication or inner-product correlation, where the two levels of light intensity -on and off- can be used to represent bipolar binary vectors. Optical implementation of neural networks based on the Hopfield model is described as an example to show the application of this novel method.