TAF PUBLISHING

Multi-modal artifact metrics is an anti-counterfeiting technique and was created based on the concept of multimodal biometrics. This method adds additives (functional materials) to the artifact during the manufacturing process to provide multiple feature information. Hence, the certainty of authenticity and difficulty of counterfeiting could be enhanced. We developed a new type of glass phosphor to provide two kinds of characteristic optical information (emission intensity and hue) into the artifact. This is a novel approach since up-conversion phosphors with a different hue and emission intensity by optical excitation at each observation point have never been reported. In this paper, we report the development of this glass phosphor, especially the production method and results of the fundamental experiments. The developed glass phosphor emitted as intended and demonstrated the validity of our approach.