Photoluminescent Authentication Using Smartphone Camera Detection
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Solution Overview
Problem
Current anti-counterfeiting methods are either expensive or difficult for consumers to use effectively, as they often rely on RFID tags or techniques that can be circumvented by counterfeiters, lacking a cost-effective and accessible solution for authenticating products.
Innovation Solution
A photoluminescent authentication system using a substrate with photoluminescent material that absorbs radiation and emits a spectral signature, which is measured by a photoauthentication device, such as a smartphone, to generate a code for verification, allowing for easy authentication of items.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID tags are used for authentication, then authentication accuracy is improved, but device cost increases and consumer accessibility deteriorates
Solution Approach 1:
The patent replaces RFID (electromagnetic field-based) authentication with photoluminescence-based authentication using a camera and light source. The camera captures images of the photoluminescent material under specific lighting conditions, and authentication is performed by analyzing the captured spectral characteristics. This substitution eliminates the need for expensive RFID tags and specialized readers, making the system accessible to consumers using standard smartphone cameras.
Solution Approach 2:
The patent uses photoluminescent materials that can be applied as coatings or labels on products, replacing expensive RFID tags. These photoluminescent materials are inexpensive to apply and can be integrated into product packaging or labels, providing a cost-effective authentication solution that maintains high reliability.
2Device complexity
If traditional markings or holograms are used, then device complexity is reduced, but authentication reliability deteriorates as counterfeiters can circumvent them
Solution Approach 1:
The patent changes the authentication parameter from visual inspection of markings or holograms to measurement of photoluminescence spectral characteristics. By using the decay time and spectral signature of photoluminescent materials, the system achieves high authentication reliability that is difficult for counterfeiters to replicate, while maintaining relative system simplicity through the use of standard camera equipment.
Solution Approach 2:
The patent substitutes visual authentication methods (markings, holograms) with photoluminescence-based authentication. This replacement provides enhanced reliability because photoluminescent materials have specific spectral signatures and decay times that are difficult to counterfeit, while the implementation remains simple using readily available camera technology.
3Device complexity
If photoluminescent materials are used, then cost-effectiveness improves and consumer accessibility improves, but measurement precision requirements increase
Solution Approach 1:
The patent uses standard camera sensors to measure photoluminescence spectral characteristics, replacing expensive specialized spectroscopic equipment. The camera captures images under controlled lighting conditions, and the spectral signature is extracted from the captured image data. This approach maintains measurement precision sufficient for authentication while dramatically reducing cost and improving consumer accessibility.
Solution Approach 2:
The patent measures specific parameters of photoluminescence (spectral signature, decay time) that provide unique authentication characteristics. By focusing on these specific temporal and spectral parameters rather than full spectral analysis, the system achieves high measurement precision with standard camera equipment, balancing cost-effectiveness with authentication reliability.
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
Provides a cost-effective and accessible method for authenticating products, making it difficult for counterfeiters to circumvent, while ensuring the authenticity of items through a measurable spectral signature.
Implementation Method 1
a photoluminescent material disposed on or in a substrate and capable of absorbing an incident radiation from a radiation source and emitting an emitted radiation having a spectral signature with a decay time after removal of the radiation source
Data Source
AI summary
A system and method for authenticating an item, including a photoluminescent material disposed on or in a substrate and capable of absorbing an incident radiation from a radiation source and emitting an emitted radiation having a spectral signature with a decay time after removal of the radiation source, and a photoauthentication device capable of being disposed in contact with the substrate and including the radiation source and a camera, where, in connection with providing the incident radiation and measuring the emitted radiation, the photoauthentication device is translated across the substrate while the photoauthentication device is disposed in contact with the substrate, and after translation across or over the substrate and the radiation source is not providing the incident radiation, the photoauthentication device is static with respect to the substrate and the camera is disposed over the photoluminescent material emitting the emitted radiation when the emitted radiation is measured.