Security object having a dynamic and static window security feature and method for production

Patent metadata

Field	Value
Publication number	US-10800201-B2
Application number	US-201716082135-A
Country	US
Kind code	B2
Filing date	Mar 3, 2017
Priority date	Mar 4, 2016
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A security object has a document body. A lens array is formed on a top side and first information is stored in the document body. The optical detectability of the first information through the lens array is dependent on a detection direction. The document body has a top view section, in which the document body has a material layer that is translucent or opaque, and adjacent thereto a window section, in which the document body is formed of a material transparent in volume between a top side and a bottom side. The lens array extends over part of the window section and over part of the top view section and spans a section boundary between the sections. The first information also is formed partially in the top view section and partially in the window section and, in the window section, laser-marked, static second information is stored in the document body.

First claim

The invention claimed is:

1. A security object, comprising:
a document body being a laminated body formed from various material layers and having a planar extent with an upper side and a lower side opposite said upper side;
a lens array formed at or in said upper side of said document body;
a laser-marked and observation-direction-dependent first information item stored in said document body by way of first irreversible material changes in said document body, an optical observability of the first information item through said lens array depending on an observation direction;
said document body having a reflected view portion, in said reflected view portion, said document body having between said upper side and said lower side of said document body a translucent or opaque material layer;
said document body having a window portion adjoining said reflected view portion, in said window portion said document body is formed from material that is transparent in volume, in a region of said window portion, all of said various materials layers disposed above said window portion and disposed below said window portion are embodied as being transparent;
said lens array extending over both at least part of said window portion and at least part of said reflected view portion and, as a result thereof, bridges a portion boundary between said reflected view portion and said window portion;
said laser-marked and observation-direction-dependent first information item is embodied partly in said reflected view portion and partly in said window portion; and
a laser-marked second information item stored in said window portion by way of second irreversible material changes in said document body, said laser-marked second information item is observable optically as an information item both through said lens array at or in said upper side of said document body and through said lower side of said document body.

2. The security object according to claim 1 , wherein the first information item and the second information item form an overall information item.

3. The security object according to claim 2 , wherein the overall information item is stored in said document body as a reference information item, in addition to the first and second irreversible material changes.

4. The security object according to claim 1 , wherein at least part of the second information item is stored immediately adjacent to said portion boundary.

5. The security object according to claim 2 , wherein the overall information item contains a meaning, said meaning not being represented completely graphically by either the first information item or the second information item.

6. The security object according to claim 1 , wherein said document body has a first laser-sensitive transparent material layer, in which said first irreversible material changes are formed, and is formed between said upper side and said translucent or opaque material layer.

7. The security object according to claim 6 , wherein said document body has a second laser-sensitive transparent material layer, which is formed between said first laser-sensitive transparent material layer and said lower side and in which the second irreversible material changes are formed.

8. The security object according to claim 7 , wherein said second laser-sensitive transparent material layer is disposed between said lower side and said translucent or opaque material layer.

9. The security object according to claim 1 , wherein said translucent or opaque material layer is formed from a translucent or opaque substrate layer, which has a cutout in a region of said window portion, said cutout being filled with a transparent material.

10. A method for producing a security object, which comprises the steps of:
providing or producing a document body with a planar extent, the document body having an upper side and a lower side opposite said upper side;
forming a lens array at or in the upper side;
storing a laser-marked and observation-direction-dependent first information item by virtue of spatially modulated laser light being radiated through the lens array from one direction and first irreversible material changes being caused in focal regions of lenses of the lens array;
forming the document body with a reflected view portion, in the reflected view portion the document body having a translucent or opaque material layer between the upper side and the lower side of the document body;
forming the document body with a window portion adjoining the reflected view portion, the document body being formed in the window portion from material that is transparent in volume between the upper side and the lower side of the document body, wherein the lens array extending over both at least part of the window portion and at least part of the reflected view portion and, as a result thereof, bridges a portion boundary between the reflected view portion and the window portion;
implementing the storing of the laser-marked and observation-direction-dependent first information item in such a way that the laser-marked and observation-direction-dependent first information item is formed partly in the reflected view portion and partly in the window portion; and
radiating further spatially modulated laser light into the window portion through the lower side and a second information item is laser-marked and stored in the document body by way of second irreversible material changes, wherein the second information item is observable optically as an information item both through the lens array at or in the upper side of the document body and through the lower side of the document body.

11. The method according to claim 10 , which further comprises selecting the second information item in such a way that it the first information item and the second information item together form an overall information item, the overall information item having a meaning which is not represented completely graphically by either the first information item or the second information item.

12. The method according to claim 10 , which further comprises forming the document body at least partly as a laminated body by virtue of a plurality of substrate layers being brought together into a substrate layer stack and being connected in planar fashion to one another in a lamination step by an introduction of energy, wherein, in the substrate layer stack, a substrate layer that is translucent or opaque in volume is formed or arranged, the substrate layer forming the translucent or opaque material layer of the document body, wherein the substrate layer that is translucent or opaque in volume has a cutout in a region that corresponds to the window portion, the cutout being filled with a transparent material before or during the lamination step.

13. The method according to claim 12 , which further comprises imprinting the lens array into the upper side of the laminated body by means of a lamination stamp during the lamination step.

14. The method according to claim 10 , wherein an incoming beam direction of the spatially modulated laser light is implemented by way of a rotation of the document body relative to a principal optical axis of the spatially modulated laser light.

15. The method according to claim 10 , wherein a position of the portion boundary between the window portion and the reflected view portion is established relative to a marking apparatus and a spatial modulation and/or positioning of an incoming radiation of a first laser light is implemented in dependence on an established position of the portion boundary.

16. The method according to claim 10 , which fu

Assignees

• Bundesdruckerei Gmbh
• Bundesrepublik Deutschland Vetreten Durch Das Bundesministerium Des Innern Vertr D Das Bundes
• Bundesrepublik Deutschland Vertreten Durch Das Bundesministerium Des Innern Vertreten Durch Das Bund

Inventors

• Zernicek Simone
• Bosien Andreas
• Knebel Michael
• Leopold Andre
• Seidel Uwe
• Schneider Ulrich

Classifications

• B42D25/342

  Moiré effects · CPC title

• B42D25/425

  by deformation, e.g. embossing · CPC title

• B42D25/29

  Securities; Bank notes · CPC title

• B42D25/45

  Associating two or more layers · CPC title

• B42D25/23 Primary

  Identity cards · CPC title