Computer generated holography

A readable picture at the naked eye can be coded with the computer generated holography in a cloud of small points. The reading of the hologram is done by illuminating the cloud of points by laser light.

The particular ARANANO know-how is the ability to embed an hologram coded with a cloud of microscopic points in a picture in grey level or to “organize ” the cloud of points in a macroscopically readable graphic. It becomes very difficult to identify the presence of a hologram. This technique is extremely robust and almost tamper proof. It can therefore be used as an anti-counterfeiting “tag”.