Correlation is considered to be a fundamental operation in the
field of signal processing. The fact that this operation can be
implemented optically in a relatively simple manner is an important
advantage of utilizing optical systems for signal processing. The
VanderLugt 4-f system and the joint transform correlator
(JTC) are the two most popular configurations for performing a
spatial correlation operation optically. So far the JTC
architecture has been used for performing correlation between two
images, which are illuminated by a quasi-monochromatic light
source. We propose a generalization of the JTC that performs a
correlation between two temporal optical signals.
© 2000 Optical Society of America
Equations on this page are rendered with MathJax. Learn more.