Novel online security system based on rare-earth-doped glass microbeads

Simon Officer; G. Radhakrishna Prabhu; Pat Pollard; Catherine Hunter; Gary A. Ross

doi:10.1117/12.528191

3 June 2004 Novel online security system based on rare-earth-doped glass microbeads

Simon Officer, G. Radhakrishna Prabhu, Pat Pollard, Catherine Hunter, Gary A. Ross

Proceedings Volume 5310, Optical Security and Counterfeit Deterrence Techniques V; (2004) https://doi.org/10.1117/12.528191
Event: Electronic Imaging 2004, 2004, San Jose, California, United States

Abstract

A novel fluorescent security label has been produced that could replace numerous conventional fluorescent dyes in document security. This label utilizes rare earth ions doped in a borosilicate glass matrix to produce sharp spectral fluorescence peaks with characteristic long lifetimes due to the rare earth ions. These are subsequently detected by an online detection system based on fluorescence and the long lifetimes to avoid any interference from other fluorophores present in the background. Security is further enhanced by the interaction of the rare earth ions with each other and the effect of the host on the emission spectra and therefore the number of permutations that could be produced. This creates a very secure label with various applications for the security market.

Citation Download Citation

Simon Officer, G. Radhakrishna Prabhu, Pat Pollard, Catherine Hunter, and Gary A. Ross "Novel online security system based on rare-earth-doped glass microbeads", Proc. SPIE 5310, Optical Security and Counterfeit Deterrence Techniques V, (3 June 2004); https://doi.org/10.1117/12.528191

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