Abstract

A technique that increases the efficiency of a conventional joint-transform correlator is proposed. By modifying the joint-transform power spectrum of the input objects by using a spatial sampling method, the readout light as well as the physical area of the square-law detector can be fully utilized. As a result, the output correlation intensity can be substantially increased. Cases of using coherent and partially coherent readout light are discussed, and experimental results are presented.

© 1990 Optical Society of America

White-light joint-transform correlator

F.T.S. Yu and Y.S. Cheng
Opt. Lett. 15(3) 192-194 (1990)

Comparison of detection efficiencies for VanderLugt and joint transform correlators

Francis T. S. Yu, Q. W. Song, Y. S. Cheng, and Don A. Gregory
Appl. Opt. 29(2) 225-232 (1990)

Complex reference-invariant joint-transform correlator

David Mendlovic, Emanuel Marom, and Nairn Konforti
Opt. Lett. 15(21) 1224-1226 (1990)

Nonconventional joint-transform correlator

Francis T. S. Yu, Chenhua Zhang, Yong Jin, and Don A. Gregory
Opt. Lett. 14(17) 922-924 (1989)

Illumination-independent high-efficiency joint transform correlator

Suganda Jutamulia, George M. Storti, Don A. Gregory, and James C. Kirsch
Appl. Opt. 30(29) 4173-4175 (1991)