Holographic Matrix Anti-Copy Marks Using Picosecond Laser Structuring
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Solution Overview
Problem
Existing methods for protecting content on security documents and cards, such as encryption, are inadequate as they can be accessed by malicious third parties with the decryption key, which may be stored or carried by users or in computer systems.
Innovation Solution
A method for creating a holographic matrix with both anti-copy and copy-robust marks, using picosecond laser technology to produce holograms that can detect copying and include error rates for secure message representation, allowing for detection of original versus copied documents without database access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption is used to protect content on security documents, then data security is improved, but the system becomes vulnerable to malicious third parties with decryption keys stored on media or servers
Solution Approach 1:
The patent extracts the security function from centralized key storage and relocates it to distributed holographic marks embedded in the document itself. Each holographic mark contains authentication information that can be verified without accessing external key stores, eliminating the vulnerability chain from key extraction to document authentication.
Solution Approach 2:
The security system becomes self-contained within the document through holographic marks that embed authentication data directly in the visual structure. The document itself carries its own authentication mechanism, requiring no external key management infrastructure and making it self-verifying against forgery.
2Reliability
If traditional copying protection methods are used, then copying detection is improved, but the complexity of the system increases
Solution Approach 1:
The patent merges the holographic image content with authentication marks into a single integrated structure. The anti-copy marks and copy-robust marks are embedded within the holographic matrix itself, combining the visual information with security functionality in one element rather than requiring separate authentication systems.
Solution Approach 2:
The holographic marks serve multiple functions simultaneously: they display visual information, provide authentication data, enable copying detection, and resist unauthorized reproduction. This multi-functionality eliminates the need for separate security systems and reduces overall complexity.
3Measurement precision
If anti-copy marks with high error rates are implemented, then copying detection accuracy is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes picosecond laser parameters to create marks with controlled error rates. By adjusting laser duration, intensity, and scanning patterns, the system achieves the desired error rate (greater than five percent) while maintaining manufacturability. The ultrashort pulse duration enables precise control without requiring extremely high manufacturing precision.
Solution Approach 2:
The laser marking process uses periodic scanning and pulsing to distribute the marking action across the holographic matrix. This periodic application of laser energy allows for controlled error introduction while maintaining overall mark integrity, achieving the target error rate without demanding extreme precision in every individual mark formation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The holographic matrix effectively prevents unauthorized copying and ensures secure authentication by using unpredictable error rates and redundancy in the anti-copy marks, enabling secure verification of document authenticity at a nanometer scale.
Implementation Method 1
at least one of the steps of forming at least one mark on said holographic matrix implementing a laser holographic matrix surface structuring
Implementation Method 2
a step of forming the holographic matrix, which is configured to produce holograms by printing
Data Source
AI summary
A method of marking a holographic matrix. The method includes forming the holographic matrix, which is designed to produce holograms by printing. At least one anti-copy mark on the holographic matrix is formed and at least one copy-robust mark on the holographic matrix is formed. At least one of the steps for forming at least one mark on the holographic matrix uses laser-structuring of the holographic matrix surface. Preferably, the anti-copy mark represents a message and a plurality of redundancies of the message carried by the anti-copy mark. Also, preferably, a picosecond laser is used to form the anti-copy mark is formed.