Metamaterial Security Document Stack Verification
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Solution Overview
Problem
Current methods for verifying the number and authenticity of stacked security documents are laborious, slow, and require complex mechanical equipment, making them inefficient for large-scale use.
Innovation Solution
The implementation of a metamaterial-based security document that forms a negative refractive index when stacked, allowing for rapid verification using radiation and detection of a target position, eliminating the need for manual counting and individual authenticity checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual or mechanical methods are used to verify the number and authenticity of stacked documents, then verification can be performed with simple equipment, but the process is laborious, slow, and requires complex mechanical equipment for automated counting and checking
Solution Approach 1:
The patent replaces mechanical counting and verification systems with an optical field-based metamaterial verification system. Documents contain structural elements that form a metamaterial when stacked, which can be verified by irradiating the stack with radiation and detecting the refraction pattern, eliminating the need for mechanical handling and individual document inspection
Solution Approach 2:
The patent combines multiple verification functions (counting and authenticity checking) into a single metamaterial verification process. By designing structural elements that only form the required metamaterial pattern when the correct number of genuine documents are stacked, the system simultaneously verifies both the quantity and authenticity of documents in one operation
2Measurement precision
If documents are separated, counted, and individually checked for authenticity, then accurate verification is achieved, but the process becomes laborious and time-consuming
Solution Approach 1:
The patent merges individual document verification into a collective stack verification process. The structural elements are designed so that only when the correct number of genuine documents are stacked together do they form the required metamaterial pattern, allowing simultaneous verification of all documents in the stack without individual handling
Solution Approach 2:
The structural elements are pre-configured in the documents during manufacturing to automatically form the metamaterial pattern when the correct number of genuine documents are stacked. This preliminary configuration eliminates the need for active separation, counting, and individual checking during verification
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
Enables efficient verification of document stacks by forming a metamaterial that uses radiation to confirm the presence and authenticity of documents, reducing the need for manual counting and mechanical complexity, thus streamlining the process.
Implementation Method 1
at least one structural element for forming a metamaterial when the documents are stacked
Implementation Method 2
means for irradiating the stack of documents with radiation of a frequency at which the stack of documents has a negative index of refraction, means for detecting a target position of the beam path of the radiation after refraction through the stack of documents
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3B
AI summary
The value or safety document has a structural element (102,104) for forming a meta-material. A conductor structure comprises a structural element, where the conductor structure is formed for a grid or a resonator. The structure elements are metallic and are complementary to each other. One layer has one structure element and another layer has another structure element. Independent claims are included for the following: (1) a document pile of documents with a meta-material; (2) a device for checking the number of stacked documents in a document pile; and (3) a method for checking a document pile.