Abstract

We report on the investigation of a new compact configuration of an inverted VanderLugt-type correlator system. The phase of the Fourier transform of the image to be recognized is displayed on a phase-modulating electrically addressed spatial light modulator. This phase display is compared with the phase of the Fourier transforms of a reference library recorded in a photorefractive LiNbO3 crystal. Angular hologram multiplexing permits fast data access, and the use of the conjugated replica of the stored templates leads to an elimination of phase distortions introduced by the optical system. With such a configuration, the correlator is fully shift invariant in spite of the photorefractive crystal thickness and has good discrimination with sharp correlation peaks.

© 1997 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Implementation of a photorefractive binary joint transform correlator

N. J. Cook, A. Carnicer, S. Vallmitjana, I. Juvells, C. M. Cartwright, and W. A. Gillespie
J. Opt. Soc. Am. B 15(7) 1977-1984 (1998)

Holographic associative memory with nonlinearities in the correlation domain

Y. Owechko, G. J. Dunning, E. Marom, and B. H. Soffer
Appl. Opt. 26(10) 1900-1910 (1987)

Optical correlation of spatial-frequency-shifted images in a photorefractive BSO correlator

Abtine Tavassoli and Michael F. Becker
Appl. Opt. 43(8) 1695-1702 (2004)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription