Multispectral Optical Sensing for Security Article Authentication
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Solution Overview
Problem
Advanced printing technologies enable the reproduction of security features, making it difficult to authenticate documents and increasing the likelihood of counterfeiting, while existing authentication methods may not detect characteristics outside the visual spectral range and are not accessible to visually impaired individuals.
Innovation Solution
A user device equipped with multiple optical sensor devices and light emission devices across various spectral ranges (UV, visible, NIR, SWIR, MWIR, LWIR) to detect and analyze security features, determining their authenticity through sensor data processing, and providing visual, audible, and haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If advanced printing technologies are used to reproduce security features, then manufacturing capability is improved, but document security and anti-counterfeiting capability deteriorate
Solution Approach 1:
The patent applies local quality by implementing multi-spectral sensing that detects different properties at different spectral locations (UV, visible, NIR, SWIR, MWIR, LWIR ranges). Authentic security features exhibit specific local optical properties at each spectral range that counterfeit printing cannot replicate, allowing differentiation based on localized spectral characteristics rather than overall appearance.
Solution Approach 2:
The patent utilizes parameter changes by measuring optical properties across multiple spectral parameters (six distinct spectral ranges). Authentic security features have specific spectral signatures that change predictably across these parameters, while counterfeit features fail to reproduce these parameter variations, enabling authentication through spectral parameter analysis.
2Measurement precision
If multiple optical sensor devices across various spectral ranges are used, then authentication capability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a multi-spectral sensor system where multiple optical sensor devices (capturing UV, visible, NIR, SWIR, MWIR, LWIR ranges) function together as an integrated authentication platform. Each sensor targets specific spectral bands but collectively they provide comprehensive security feature detection, allowing a single device to perform multiple detection functions that would otherwise require separate specialized instruments.
Solution Approach 2:
The patent implements segmentation by dividing the spectral detection task into six distinct spectral range segments, each handled by specialized sensor devices. This segmentation allows each sensor to be optimized for its specific spectral band while the system integrates results from all segments to achieve comprehensive authentication, managing complexity through functional division.
3Measurement precision
If multi-spectral sensing is used to detect invisible security features, then authentication accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by sequentially activating different light emission devices corresponding to different spectral ranges rather than operating all sensors simultaneously. The system cycles through UV, visible, NIR, SWIR, MWIR, and LWIR ranges in sequence, collecting spectral data over time. This periodic operation reduces peak energy consumption compared to continuous multi-spectral illumination while still capturing complete spectral signatures for authentication.
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
Enhances authentication capabilities by detecting invisible security features, reducing counterfeiting, and making authentication more accessible to visually impaired users, while minimizing resource usage for counterfeit detection.
Implementation Method 1
causing light to be emitted at a security article by one or more light emission devices
Implementation Method 2
obtaining from a first set of one or more optical sensor devices of a plurality of optical sensor devices of the user device, and based on causing the light to be emitted, first sensor data associated with the security article
Data Source
AI summary
A user device may cause light to be emitted at a security article by one or more light emission devices of the user device. The user device may obtain from a first set of one or more optical sensor devices of the user device first sensor data associated with the security article, and may obtain from a second set of one or more optical sensor devices of the user device second sensor data associated with the security article. The user device may determine, based on the first sensor data and the second sensor data, one or more characteristics of a security feature of the security article. The user device may determine, based on the one or more characteristics of the security feature, whether the security article is authentic. The user device may cause, based on determining whether the security article is authentic, one or more actions to be performed.