Optical implementation of a three-dimensional (3-D) Fourier transform is
proposed and demonstrated. A spatial 3-D object, as seen from the paraxial
zone, is transformed to the 3-D spatial frequency space. Based on the new
procedure, a 3-D joint transform correlator is described that is capable of
recognizing targets in the 3-D space.
© 1997 Optical Society of America
Equations on this page are rendered with MathJax. Learn more.