Rolic Ag

Rolic Technologies Ag

Etienne Berner

Julien Martz

Benoit Schill

Reto Genini

Benoît Schill

An optical element where a first and a second image is at least partially encoded by a pattern of a non-periodic, anisotropic surface relief microstructure such that when light is incident on the surface of the element the first image is optimally visible under a first viewing angle and the second image is optimally visible under a second viewing angle. The optical element is particularly useful for securing documents and articles against counterfeiting and falsification.

Multiple image scattering device

The invention relates to an optical security device with multiple hidden images which become visible by arranging a polarizer above or below the device. Additional images become visible upon rotation of the polarizer. The optical device comprises two patterned optical retarders and a polarizer between the retarders.

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Muenchenstein, Switzerland

Etienne Berner