Security document

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G - Physics

07

D

G07D 7/12 (2006.01)

Patent

CA 2581142

The invention relates to a security document (7) with a first transparent area (72), inside of which a first transparent optical element (74) is placed, and with a second area (71), inside of which a second opaque optical element (73) is placed. The second opaque optical element (73) exhibits a first optical effect. The first area (72) and the second area (71) are placed in an interspaced manner on a support (75) of the security document whereby enabling the first and second areas to be superimposed. When the second optical element is overlapped by the first optical element with a first distance (26) between the first and second optical elements, a second optical effect is produced, and when the second optical element is overlapped by the first optical element with a second distance (25) between the first and the second optical elements, which is greater than the first distance (26), a third optical effect (51) is produced that differs from the second optical effect.

L'invention concerne un document de sécurité (1) comprenant une première zone transparente (72) dans laquelle est disposé un premier élément optique (74) transparent, ainsi qu'une seconde zone (71), dans laquelle est disposé un second élément optique (73) opaque. Le second élément optique (74) opaque manifeste un premier effet optique. La première zone (72) et la seconde zone (71) sont disposées à distance mutuelle sur un support (75) du document de sécurité, de sorte que la première et la seconde zone puissent être placées en recouvrement mutuel. Lorsque le second élément optique est recouvert par le premier, avec un écart (26) entre le premier et le second élément optique, un deuxième effet optique intervient. En cas de recouvrement du second élément optique par le premier élément optique, avec un écart (25) entre le premier et le second élément optique, qui est supérieur au premier écart (26), il se produit un troisième effet optique, différent du deuxième.

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