Abstract
A joint Fourier transform image correlator that uses a binary spatial light modulator at the Fourier plane is presented. In this system, the Fourier transforms interference intensity is thresholded to only two values so that a binary spatial light modulator can be used to read-out the interference intensity. The performance of the correlator introduced here is compared to the classical joint transform correlator in the following areas: correlation peak, correlation peak to sidelobe ratio, correlation bandwidth, and discrimination. We show that the bipolar Fourier transforms interference intensity can result in a higher correlation intensity and a better defined correlation spot than the classical joint transform correlator. Computer simulation is used to test the correlators and the three dimensional plots of the autocorrelation and cross-correlation functions are presented and discussed.
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