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1. (WO2001036213) SECUREMENT OF DOCUMENTS OR PRODUCTS BY AFFIXING AN OPTICALLY ACTIVE COMPONENT FOR VERIFYING AUTHENTICITY

Pub. No.:    WO/2001/036213    International Application No.:    PCT/FR2000/003201
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Sat Nov 18 00:59:59 CET 2000
IPC: B42D 15/00
B42D 15/10
Applicants: HOLOGRAM INDUSTRIES S.A.
SOUPARIS, Hugues
Inventors: SOUPARIS, Hugues
Title: SECUREMENT OF DOCUMENTS OR PRODUCTS BY AFFIXING AN OPTICALLY ACTIVE COMPONENT FOR VERIFYING AUTHENTICITY
Abstract:
The invention concerns a component for authenticating a document or a product, comprising a transparent plastic film embossed to display at least a diffraction grating, the embossed surface being at least partly coated with a metallized layer. The invention is characterised in that the embossed film includes a first zone (4) producing a rainbow effect with respect to the illuminating direction, said rainbow effect vanishing when the component is oriented perpendicularly to the first orientation, and a second zone (6) coated with a dielectric material producing a coloured effect of a first colour for a first orientation of the component and a second different colour for the orientation perpendicular to the first orientation.