WebOptically variable device(OVD) is a concept in t he industry, including cost-efficient and unique authentication functionality. OVD based features may serve as the main counterfeit mitigating functionality, as in s. For higher value docu- banknote ments, such as passports, security architectural design may include multimodal (com-

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WebOct 1, 2006 · In optically variable devices based on foil, the deterrence of counterfeiting is dependent upon both the uniqueness of the optical effects produced by the device and the degree of control over the origination technology practiced by the technology owner. WebOct 1, 2011 · It provides both visual OVD security and machine verifiable authenticity. … signs of pregnancy in hamsters

Counterfeit protection with OVD - Find alternatives - AlpVision

WebDec 1, 2015 · Moreover, counterfeit detection on selected Philippine banknotes was … WebOVD patch seen on the current ₱500 An optical variable device or optically variable device (OVD) is an iridescent or non-iridescent security feature that exhibits different information, such as movement or colour changes, depending on the viewing and/or lighting conditions. WebOct 1, 2006 · To counteract this rapidly evolving threat, the diffractive optically variable device (OVD) ... -based OVDs relates to the additional cost associated with the production of the embossed foil and stamping of the foil patch onto the substrate. A much cheaper option is the direct embossing onto the substrate. signs of pregnancy labor