3 June 2004 Integration of contrasting technologies into advanced optical security devices
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OVP security pigment, the active ingredient in OVI security ink, is an assembly of high performance microscopic filters. The market acceptance of these filters has led them to become perhaps the most widely distributed interference devices on the planet. Recently, interference devices have been developed that provide the security industry with features beyond proven overt protection. New products are being launched that unite the attributes of optical interference with those of other technologies. One approach integrates thin film interference and diffractive interference to create a host of new security devices. The combined effects are complex and often surprising. The science behind the fusion is explored and the effects demonstrated. Interference pigment technology has also been combined with the science of magnetics to create a new line of OVP security pigments. To facilitate the practical use of such pigments, novel application technology has been developed which allows for the creation of new overt effects. This paper examines pigment designs and describes the physics behind the advanced application technology. The science of layering security features has long been demonstrated effective in deterring counterfeiting. Now it is possible to provide multiple layers of security within the same device through the integration of proven technologies.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul G. Coombs, Paul G. Coombs, Alberto Argoitia, Alberto Argoitia, Vladimir P. Raksha, Vladimir P. Raksha, Roger W. Phillips, Roger W. Phillips, } "Integration of contrasting technologies into advanced optical security devices", Proc. SPIE 5310, Optical Security and Counterfeit Deterrence Techniques V, (3 June 2004); doi: 10.1117/12.530039; https://doi.org/10.1117/12.530039

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