Optical Correlator
An Optical Correlator is a device which compares the two signals by utilising the Fourier transforming properties of a lens. It is generally used in optics for target tracking and identification. They have the capability to perform complex pattern recognition rapidly than the known digital techniques. Optical correlators are capable of processing large amounts of data in a data stream which can be useful in the detection, extraction and classification of desired information included in the data.