Applied Optics · 2018 · 30 citations · 17 references
Natural SciencesManufacturing EngineeringMaterials ScienceAdditive ManufacturingAuthenticationOptical MaterialsCounterfeitingHolographyOptical PrintingAnti-counterfeiting TechnologiesBrand Identity ProtectionHologram AuthenticationManufacturingOnline Brand ProtectionPhotopolymer MaterialsPhotopolymer ResinsVolume Holograms
The problems presented by counterfeit products and documentation are discussed. Limitations of existing holograms for anti-counterfeit applications are described. We describe the advantages of full holographic serialization and the requirements in terms of materials and techniques for mass production of true serialized holograms. These requirements having been met, we report for the first time the mass production of fully serialized holograms. The novelty of the approach consists of the direct use of the product manufacturer's information as the object in a holographic recording system along with a self-processing photopolymer and modular optical system to facilitate mass production of truly serialized volume holograms. Various types of serialized holograms for overt and covert authentication are described. We discuss briefly the application of Optrace's manufacturing methods for future generation holographic devices.
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Izabela Naydenova, Raghavendra Jallapuram, Vincent Toal et al. · Applied Physics Letters · 2008 · 117 citations · Full text
Encrypted optical memory using double-random phase encoding
Bahram Javidi, Guanshen Zhang, Jian Li · Applied Optics · 1997 · 114 citations