Infrared-Detectable Colloidal Crystal Security Tag Authentication
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Solution Overview
Problem
Existing anti-counterfeit structures that rely on visible light spectrum color changes are not sufficiently covert and can be easily overlooked, leading to reduced anti-counterfeit effectiveness.
Innovation Solution
A security tag featuring a resin layer with embedded colloidal particles arranged in a two-dimensional crystal configuration, making it invisible in the visible light spectrum and detectable in infrared, utilizing a unique and unreproducible diffraction pattern for authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an anti-counterfeit structure uses visible light spectrum color change for authentication, then the authenticity can be verified by observation, but the structure becomes visible and can be easily overlooked or replicated
Solution Approach 1:
The patent applies color change principles by utilizing infrared absorption characteristics of the colloidal crystal structure. The structure appears invisible in the visible spectrum but exhibits detectable color changes or absorption patterns in the infrared region, allowing authentication while remaining covert from counterfeiters who rely on visible inspection
Solution Approach 2:
The patent changes the detection parameter from visible light to infrared light. By designing the colloidal crystal structure to interact with infrared wavelengths rather than visible wavelengths, the authentication mechanism operates in a spectral region that is invisible to the human eye and conventional counterfeit detection methods, thereby improving security
2Object-affected harmful factors
If the security tag is made invisible in the visible light spectrum, then it becomes imperceptible to counterfeiters, but it requires specialized infrared detection equipment for verification
Solution Approach 1:
The patent introduces an intermediary detection mechanism using infrared light as a mediator between the security tag and the verifier. The colloidal crystal structure serves as an intermediary that stores authentication information in its infrared absorption properties, enabling covert security verification without requiring direct visible interaction
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 security tag provides high anti-counterfeit protection by being imperceptible to counterfeiters, ensuring its presence is not replicated, and allows for reliable authenticity verification through infrared detection.
Implementation Method 1
utilizing a unique and unreproducible diffraction pattern for authentication
Data Source
AI summary
A security tag that includes a resin layer, and a plurality of colloidal particles. The plurality of colloidal particles are embedded in the resin layer and arranged, spaced apart from one another, along a planar direction perpendicular to a thickness direction. The plurality of colloidal particles constitute at least one type of two-dimensional crystal.