Optically variable tactile security feature
AssigneeEntrust Datacard Corporation
InventorDennis J. Warwick
Life of this patent
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Abstract
A security document and method of manufacturing the security document are disclosed. The security document includes a substrate including a laser reactive material and data. The security document also includes an optically variable tactile security feature formed in the laser reactive material, the optically variable tactile security feature including a non-tactile portion and a tactile portion. When viewed at a first viewing angle, the optically variable tactile security feature appears to be a first color, and at a second viewing angle different from the first viewing angle, the optically variable tactile security feature appears to be a second color.
Claims22
A security document, comprising:
- a substrate including a laser reactive material;
- a first laser marked area of the substrate that is visible to the naked eye and appears generally black to the naked eye;
- a second marked area of the substrate that is visible to the naked eye and appears generally black to the naked eye;
- an overlapping area in which a region of the first laser marked area and a region of the second laser marked area overlap, wherein the overlapping area is tactile;
- a non-overlapping area in which a region of the first laser marked area and a region of the second laser marked area do not overlap, wherein the non-overlapping area is non-tactile,
- wherein when viewed at a first viewing angle, the non-overlapping area reflects light and visually appears to be a first shade of color, and at a second viewing angle different from the first viewing angle, the non-overlapping area reflects light and visually appears to be a second shade of color that is different from the first shade of color.
A method of producing an optically variable tactile security feature on a security document that includes a substrate having a laser reactive material, comprising:
- in a first laser marking pass, selectively marking the security document using a laser to form a first laser marked area that is visible to the naked eye and appears generally black to the naked eye in the laser reactive material;
- and
- in a second laser marking pass, selectively marking the security document using a laser to form a second laser marked area that is visible to the naked eye and appears generally black to the naked eye in the laser reactive material, wherein the first laser marked area is tactile in an overlapping area in which the first laser marked area and the second laser marked area overlap, and the second laser marked area is non-tactile in a non-overlapping area in which the first laser marked area and the second laser marked area do not overlap.
Dependencies are inferred from the claim text.