Evaluation of optical security features in ID documents, currency, and stamps
John W. Mercer · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2002
Optical security features have been increasingly used to protect and ensure the integrity of value documents. The types of optical features and their purposes are discussed. The application of these optical features to ID documents, currency and postage stamps are discussed. Particular attention is paid to the fraud and counterfeit resistance of the features in relation to the specific document.