Security document with a 3d colour photograph
AssigneeMorpho
InventorsErik VAN DIJK, Ronald Rene TEN VELDEN
Life of this patent
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Abstract
Identification structure (1) with a portrait image (3) of a holder, the identification structure having a substrate (8, 50), a laser sensitive layer (11, 55) and a lens array (12, 56) overlying the laser sensitive layer (11, 55), the substrate including a printed pattern (9, 54), the laser sensitive layer including a laser engraved image pattern (15, 15′; 16, 16′). The laser engraved image pattern forms a three dimensional portrait image (A, B) of the holder and the printed pattern forms a two-dimensional color pattern (C) of the portrait image of the holder, wherein the two-dimensional color pattern (C) and the three-dimensional portrait image (A, B) are adapted to be observed in a superimposed manner.
Claims20
Identification structure (1) with a portrait image (3) of a holder, the identification structure having a substrate (8, 50), a laser sensitive layer (11, 55) and a lens array (12, 56) overlying the laser sensitive layer (11, 55), the substrate comprising a printed pattern (9, 54), the laser sensitive layer comprising a laser engraved image pattern (15, 15′;
- 16, 16′), wherein the laser engraved image pattern forms a three dimensional portrait image (A, B) of the holder and the printed pattern forms a two-dimensional colour pattern (C) of the portrait image of the holder, wherein in a single perpendicular viewing position of the substrate the two-dimensional colour pattern (C) and the three-dimensional portrait image (A, B) are adapted to be simultaneously observed in a superimposed manner as a three-dimensional colour portrait.
Method of manufacturing an identification structure (1) comprising the steps of:
- providing a colour portrait photograph of a holder,
- providing two sets of image lines, each set forming a portrait photograph of the holder at a mutually differing angle,
- printing a colour pattern (C) corresponding to the colour portrait on a substrate (8, 50),
- providing a laser image layer (10, 55) comprising the laser sensitive layer (11) and an overlying lens structure (12, 56),
- laser engraving the two sets (a1, b1), . . . , (an, bn) of image lines into the laser image layer through the lens structure in such a manner that in a single perpendicular viewing position of the substrate the two-dimensional colour pattern (C) and the three-dimensional portrait image (A, B) can be simultaneously observed in a superimposed manner as a three-dimensional colour portrait image (A, B),
- combining the substrate (8, 50) with the laser image layer (10, 55), either prior to or after laser engraving.
Dependencies are inferred from the claim text.