E-Motion: Security in Depth, Without the Thickness

Over the past few years, light-field imaging has been considered one of the more promising directions for next-generation document security features. By reproducing not only the intensity of light but also its direction, a light-field structure can create convincing 3D imagery that changes naturally when the viewing angle shifts. The result is an effect that is both visually striking and immediately verifiable by the naked eye.

Demax, the Bulgarian security printer and nano-optical specialist, has introduced a new approach to this concept with E-Motion™, a thin diffractive security structure designed to reproduce a 3D light field using only a single optical layer. As the company explained during the recent HSP EMEA conference in Rabat, Morocco, the aim is to retain the strong visual performance associated with light-field technology while simplifying the structure so that it can be more easily integrated into secure documents such as banknotes.

Light-field systems used in security features normally rely on a two-layer architecture.