Security element and method for producing a security element

Patent metadata

Field	Value
Publication number	US-2022105743-A1
Application number	US-202117477986-A
Country	US
Kind code	A1
Filing date	Sep 17, 2021
Priority date	Mar 9, 2016
Publication date	Apr 7, 2022
Grant date	—

Abstract

The invention relates to a security element ( 1 ) with a first volume hologram layer ( 11 ), which spans a coordinate system with the coordinate axes x and y ( 3, 4 ) perpendicular to each other in an unbent state of the security element ( 1 ), wherein a first volume hologram is introduced into the first volume hologram layer ( 11 ) in at least one first area ( 51 ), wherein the first volume hologram is formed such that a first item of information ( 21 - 30 ) is visible for an observer ( 7 ) in a first observation situation in a first predefined bent state of the security element ( 1 ) and is not visible in the first observation situation in the unbent state of the security element ( 1 ) or vice versa.

First claim

1 . Security element ( 1 ) with a first volume hologram layer ( 11 ) which spans a coordinate system with the coordinate axes x and y ( 3 , 4 ) perpendicular to each other in an unbent state of the security element ( 1 ), wherein a first volume hologram is introduced into the first volume hologram layer ( 11 ) in at least one first area ( 51 ), wherein the first volume hologram is formed such that a first item of information ( 21 - 30 ) is visible for an observer ( 7 ) in a first observation situation in a first predefined bent state of the security element ( 1 ) and is not visible in the first observation situation in the unbent state of the security element ( 1 ) or vice versa.

2 . Security element ( 1 ) according to claim 1 ,
characterized in that the first volume hologram is formed such that at least one second item of information ( 40 - 43 ) is visible for the observer ( 7 ) in the first observation situation in at least one second predefined bent state of the security element ( 1 ) and is not visible in the first observation situation in the unbent state of the security element ( 1 ) or vice versa.

3 . Security element ( 1 ) according to one of claim 1 or 2 ,
characterized in that
in the first and/or the at least one second predefined bent state the security element ( 1 ) is bent around the x-axis and/or the y-axis.

4 . Security element ( 1 ) according to one of the preceding claims,
characterized in that in the first and/or the at least one second predefined bent state the security element is bent towards the observer ( 7 ), in particular such that the security element ( 1 ) has a concave shape in the first and/or the at least one second predefined bent state, and/or in that the security element ( 1 ) is bent away from the observer ( 7 ), in particular such that the security element ( 1 ) has a convex shape in the first and/or the at least one second predefined bent state.

5 . Security element ( 1 ) according to one of the preceding claims,
characterized in that the security element ( 1 ) has at least one bending line ( 9 ), around which the security element ( 1 ) is bent in the first and/or the at least one second predefined bent state of the security element ( 1 ).

6 . Security element ( 1 ) according to claim 5 ,
characterized in that the security element ( 1 ) is bent symmetrically or asymmetrically with respect to the bending line ( 9 ) in the first and/or the at least one second predefined bent state.

7 . Security element ( 1 ) according to one of claim 5 or 6 ,
characterized in that
the angles enclosed between a surface of the security element ( 1 ) and one of the coordinate axes x or y ( 3 , 4 ) are different on both sides of the bending line in the first and/or the at least one second predefined bent state of the security element ( 1 ) when the security element ( 1 ) is observed parallel to a plane spanned by the coordinate axes x and y.

8 . Security element ( 1 ) according to one of claims 5 to 7 ,
characterized in that
the angles enclosed between a surface of the security element ( 1 ) and one of the coordinate axes x or y ( 3 , 4 ) are substantially identical on both sides of the bending line ( 9 ) in the unbent state of the security element ( 1 ) when the security element ( 1 ) is observed parallel to a plane spanned by the coordinate axes x and y ( 3 , 4 ), in particular differ by less than 5°, preferably by less than 2.5°, further preferably by less than 1°.

9 . Security element ( 1 ) according to one of the preceding claims,
characterized in that if the Laplace operator Δ is applied to a surface of the security element ( 1 ) described by a function F(x,y), a predefined limit value is exceeded in the first and/or the at least one second predefined bent state of the security element ( 1 ) and is not exceeded in the unbent state, wherein the function F(x,y) describes the distance from the surface of the security element ( 1 ) to a two-dimensional reference surface spanned by the coordinate axes x and y ( 3 , 4 ).

10 . Security element ( 1 ) according to one of the preceding claims,
characterized in that the bending radius (r) in the first and/or the at least one second predefined bent state of the security element ( 1 ) lies between 1 mm and 100 mm, preferably between 2 mm and 50 mm, further preferably between 4 mm and 30 mm.

11 . Security element ( 1 ) according to one of claims 2 to 10 ,
characterized in that
the bending radius (r) in the first and the at least one second predefined bent state of the security element ( 1 ) differs by at least 2 mm, preferably 5 mm, further preferably 10 mm.

12 . Security element ( 1 ) according to one of the preceding claims,
characterized in that, in the direction of the coordinate axis x or y ( 3 , 4 ) around which the security element ( 1 ) is bent in the first and/or the at least one second predefined bent state, the security element ( 1 ) has a length of at least 5 mm, preferably of at least 10 mm, further preferably of at least 20 mm, even further preferably of at least 50 mm.

13 . Security element ( 1 ) according to one of the preceding claims,
characterized in that in the at least one first area ( 51 ) the first volume hologram has two or more first zones ( 10 a - j ), wherein the two or more first zones ( 10 a - j ) in the first predefined bent state of the security element ( 1 ) provide the first item of information ( 21 - 30 ) for the observer in the first observation situation.

14 . Security element ( 1 ) according to one of claims 2 to 13 ,
characterized in that
in the at least one first area ( 51 ) the first volume hologram has two or more second zones ( 10 k ), wherein the two or more second zones ( 10 k ) in the at least one second predefined bent state of the security element provide the at least one second item of information ( 40 - 43 ) for the observer in the first observation situation.

15 . Security element ( 1 ) according to one of claim 13 or 14 ,
characterized in that
the two or more first zones ( 10 a - j ) and/or the two or more second zones ( 10 k ) have a length in the unbent state of the security element ( 1 ) of at least 5 μm, preferably 50 μm, even further preferably 500 μm, in the direction of one of the coordinate axes x and/or y ( 3 , 4 ).

16 . Security element ( 1 ) according to one of claim 13 or 14 ,
characterized in that
the two or more first zones ( 10 a - j ) and/or the two or more second zones ( 10 k ) have an areal extent in the unbent state of the security element ( 1 ) of at least 5 μm x 5 μm, preferably of 50 μm x 50 μm, even further preferably of 500 μm x 500 μm.

17 . Security element ( 1 ) according to one of claims 13 to 16 ,
characterized in that
the two or more first zones ( 10 a - j ) and/or the two or more second zones ( 10 k ) are arranged according to a grid.

18 . Security element ( 1 ) according to claim 17 ,
characterized in that the grid is a one-dimensional grid, in particular a line grid, or a two-dimensional grid, in particular a dot grid.

19 . Security element ( 1 ) according to claim 5 and one of claims 13 to 18 ,
characterized in that
the two or more first zones ( 10 a - j ) and/or the two or more second zones ( 10 k ) are arranged on both sides of the bending line ( 9 ).

20 . Security element ( 1 ) according to one of claims 13 to 19 ,
characterized in that
in the first predefined bent state of the security element ( 1 ) the two or more first zones ( 10 a - j )

Assignees

• Leonhard Kurz Stiftung & Co Kg
• Ovd Kinegram Ag

Inventors

• Tompkin Wayne Robert
• Burkhardt Markus
• Lutz Norbert
• Walter Harald
• Schilling Andreas

Classifications

• G03H2001/043

  Non planar recording surface, e.g. curved surface · CPC title

• B42D25/373

  Metallic materials · CPC title

• G03H1/0011

  for security or authentication (holograms on information-bearing cards B42D25/328; testing papers with holograms G07D7/0032) · CPC title

• B42D25/355

  Security threads · CPC title

• G03H1/0236

  Form or shape of the hologram when not registered to the substrate, e.g. trimming the hologram to alphanumerical shape (substrates bearing a hologram G03H1/0272) · CPC title