Gw. Lu et al., IMPLEMENTATION OF A NON-ZERO-ORDER JOINT-TRANSFORM CORRELATOR BY USE OF PHASE-SHIFTING TECHNIQUES, Applied optics, 36(2), 1997, pp. 470-483
The implementation of non-zero-order joint-transform correlators (JTC'
s) is presented. The zero-order spectra (i.e., the autocorrelation pow
er spectral are removed from the joint-transform power spectrum by use
of phase-shifting techniques bg; which the output diffraction and inp
ut spatial domain dan more efficiently be utilized. Applications of th
e phase-shifting techniques to both conventional JTC's and phase-trans
formed input STC's (PJTC's) are discussed. Compared with the conventio
nal JTC, the PJTC has the advantages of higher light efficiency, a bet
ter signal-to-clutter ratio, and the simplicity to realize phase shift
ing. We anticipate that the proposed non-zero-order JTC's should have
a significant impact on the future development of more efficient STC's
. (C) 1997 Optical Society of America