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Security structure comprising a reflective optical structure, and associated method

A technology of safety structure and optical structure, applied in optics, optical components, mirrors, etc., can solve complex manufacturing process and other problems, and achieve the effect of simple manufacturing process

Inactive Publication Date: 2014-05-07
ARJO WIGGINS SECURITY SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] One of the disadvantages of the Moiré magnification effect is the need to be able to combine very small footprints with arrays of lenses, thus requiring complex fabrication processes

Method used

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  • Security structure comprising a reflective optical structure, and associated method
  • Security structure comprising a reflective optical structure, and associated method
  • Security structure comprising a reflective optical structure, and associated method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0072] Figure 1a An exemplary security structure 1 according to an embodiment of the invention is shown.

[0073] For example, the security structure 1 takes the form of a security thread with a width between 4mm and 10mm, preferably between 4mm and 8mm.

[0074] The security structure 1 comprises a substrate 4 , for example made of polyethylene terephthalate (PET). On the side of the face 4a of the substrate 4, ie, on the face opposite to the face 4b, the reflective optical structure 3 and the pattern 2, which appear in the foreground when viewed by an observer O, are formed.

[0075] The reflective optical structure 3 comprises an array of Fresnel lenses 3' and a reflective layer 5.

[0076] The array of Fresnel lenses 3' is formed, for example, by embossing (in the viewing direction) a lacquer 9, for example made of epoxy or acrylic resin, PET or polyester. The array of Fresnel lenses 3' embossed in the lacquer 9 may have a thickness between 1 µm and 10 µm.

[0077...

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PUM

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Abstract

The invention comprises a security structure (1) including: at least one pattern (2) that appears in the foreground; and at least one reflective optical structure (3) that provides a virtual image of the observer (O), perceived in the background, behind the foreground pattern (2).

Description

technical field [0001] The present invention relates to security structures, and more particularly to security structures intended to be inserted into security documents. Background technique [0002] The expression "security document" is understood to mean an instrument of payment (such as banknotes, checks or restaurant coupons), an identity document (such as an identity card, visa, passport or driver's license), a lottery ticket, a transport ticket, or even a sports or Entrance tickets to cultural events. [0003] To prevent attempts to counterfeit or counterfeit security documents, easily authenticated and / or recognizable security structures may be useful. [0004] It is known to produce security structures comprising arrays of lenses associated with special footprints in order to create motion, depth and / or stereoscopic effects. SECURENCY company with trademark This structure is for sale. [0005] This security structure utilizes an optical structure that is expose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B42D25/30
CPCB42D2033/10B42D2033/18B42D2033/20B42D2033/24B42D2035/20B42D2035/44B42D25/425B42D25/355B42D25/324B42D25/21B42D25/328G02B3/0037G02B5/08G02B5/09
Inventor 皮埃尔·达波利特米歇尔·加缪
Owner ARJO WIGGINS SECURITY SAS