Optical correlator using photorefractive polymers for credit card validation

B. L. Volodin, B. Kippelen, N. Peyghambarian, B. Javidi

Research output: Contribution to journalConference articlepeer-review


Using optical phase masks is a promising solution for validation of a credit cards and other documents authenticity. These masks placed on a document are invisible to the eye and, as such, are impossible to reproduce by any photographic process. They can be manufactured of transparent durable plastics and identified by an optical correlator using efficient photorefractive polymers as nonlinear material, as demonstrated in this paper. The entire system employs plastics and laser diodes for its operation and thus can be very compact and inexpensive to implement. The experimental demonstration using this method is presented and discussed.

Original languageEnglish (US)
Pages (from-to)166-167
Number of pages2
JournalConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
StatePublished - 1996
EventProceedings of the 1996 Conference on Lasers and Electro-Optics, CLEO'96 - Anaheim, CA, USA
Duration: Jun 2 1996Jun 7 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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