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Optical correlators: Crossroads or dead end?

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Abstract

It is well known and oft stated that the bailiwick of optical pattern recognition (OCPR) is those applications demanding low power, high throughput, and small form factor. The small form is at least conceptually possible, with at least one effort continuing today to produce and sell a correlator of very small size. What have been the stumbling blocks limiting the success of previous efforts, and where do we stand with respect to them nowadays? Has digital processing put the final nail into the coffin of practical optical correlation pattern recognition?

© 2003 Optical Society of America

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