A correlator is described that combines optical and electronic processing. The optical section is the first Fourier transform taking stage of a joint transform correlator; its output is electronically processed by a modified spectrum analyzer. Increased flexibility and various processing operations beyond those normally possible in an optical system result.
© 1978 Optical Society of America
David Casasent and Alan Furman, "Equalizing and coherence measure correlators," Appl. Opt. 17, 3418-3423 (1978)