A Case for Diffractive Combination Technologies

Since physical documents such as national passports remain the root of trust for establishing identities, the necessity to stay well ahead of counterfeiters is paramount. Advanced diffractive optically variable image devices (DOVIDs) have emerged as a crucial component in securing identity documents against counterfeiting and manipulation.

Canadian passport datapage.

Sophisticated DOVIDs distinguish themselves by their potential for effective design integration as well as incorporation of specific features with unique optical effects that can be used for ready authentication at first, second and forensic levels. These characteristics are not possible with other security features – hence the use of DOVIDs significantly raises the barrier to document counterfeiting.