Applications of Holography to Pattern Recognition and Optical Memories

摘要

Holography and its applications to optical associative memories, pattern recognition and three dimensional imaging are discussed. Optical holographic analogue of Hopfield's neural network model is also presented. Using Fourier transform holograms, limited shift invariant associative memories have been fabricated. Pattern recognition scheme is modified and is implemented optically using a simple and different way of achieving thresholding in the correlation domain.