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Encrypted laser holographic anti-fake mark

An anti-counterfeiting mark and laser holographic technology, applied in the field of encrypted laser holographic anti-counterfeiting marks, can solve problems such as spreading and reducing the anti-counterfeiting performance of molded holographic marks

Inactive Publication Date: 2003-01-22
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, with the rapid popularization of molded holographic technology, the counterfeiting technology of molded holographic anti-counterfeiting marks has also spread, thereby reducing the anti-counterfeiting performance of molded holographic marks

Method used

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  • Encrypted laser holographic anti-fake mark
  • Encrypted laser holographic anti-fake mark
  • Encrypted laser holographic anti-fake mark

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] like figure 1 As shown, the reflective spectral transformation anti-counterfeiting mark can usually be composed of three layers of different materials. The first layer is a plastic substrate 1 (such as PET plastic), the second layer is a metal reflective layer 2 (such as metal aluminum foil), and the third layer is an adhesive layer 3, which is usually a pressure-sensitive adhesive, that is, a self-adhesive layer. The spectrum transformation pattern is embossed on the plastic substrate and the metal reflective layer in the form of a relief structure by a molding process to form a spectrum transformation pattern layer 4 .

[0015] The transmissive spectral transformation anti-counterfeiting mark does not contain a metal reflective layer, and the spectral transformation graphics are embossed on the plastic substrate in the form of a relief structure.

[0016] The spectral transformation graph is introduced below.

[0017] Through the analysis of the diffraction light fi...

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Abstract

The encrypted laser holographic anti-fake mark includes an adhesive layer, an image layer and a plastic substrate and features its image layer of spectral converted relief structure. Between the plastic substrate and the adhesive layer, there may be a reflecting metal layer with also image layer of spectral converted relief structure. The present inventino is one practical technology developed for strengthening the anti-fake effect of anti-fake mark and is one anti-fake mark with hidden anti-fake information. The hidden anti-fake information is detected by machine rather than human eye and this increases the difficulty of imitation and raises the anti-fake effect.

Description

technical field [0001] The invention belongs to laser holographic anti-counterfeiting technology, in particular to an encrypted laser holographic anti-counterfeiting mark. Background technique [0002] my country has started the development of laser embossed holographic technology since the mid-1980s (around 1987). Because laser holographic marks cannot be simply copied by ordinary photography and printing methods; and with the emergence of embossed holographic technology, low-cost mass production of holograms can be realized, so laser embossed holograms quickly gained a lot of attention in terms of anti-counterfeiting security. application. Optical technology is used for anti-counterfeiting, mainly by using the basic laws of scattering, reflection, transmission, absorption, and diffraction produced when light interacts with matter to obtain certain special visual effects, such as multi-layer optical medium film structure, grating structure, etc. . [0003] At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/32G09F3/02
Inventor 王树初曹汉强陈汝钧
Owner HUAZHONG UNIV OF SCI & TECH
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