Abstract

Optical methods of information processing have become very attractive mainly due to high spatial resolution and bandwidth existing at optical wavelengths, which imply the capability of handling extremely high densities of information. Since the action of optical delay line correlators is based upon the interaction of ultrasound with light, realizable density is determined by the resolution of ultrasound, the read-in mechanism. This paper reports on a new technique capable of reading an increased amount of information (in terms of delay time) into a given aperture. The technique is to stack delay channels into the third dimension, or perpendicular to the aperture. Experimental measurements of channel cross talk parameters and the results obtained from a two-channel correlator are given.

© 1970 Optical Society of America

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