Fabry-Perot Etalon Spectral Measurement for Rugate Tag Authentication
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Solution Overview
Problem
The complexity of product supply chains and inadequate packaging security lead to counterfeiting and misrepresentation of high-value items, particularly in industries like pharmaceuticals and food, resulting in revenue loss and health risks, while existing authentication methods are inefficient and costly.
Innovation Solution
A system and method for wide-range spectral measurement using a broadband source, an adjustable Fabry-Perot etalon, and a detector to decode rugate tags, which are made of materials like silicon and silicon dioxide, providing a unique spectral signature for authenticating products and enabling cost-effective identification across various industries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing authentication methods are used, then product security is maintained, but authentication efficiency is low and costs are high
Solution Approach 1:
The patent replaces complex mechanical authentication systems with optical measurement technology. A broadband light source illuminates the rugate tag, and a spectrometer measures the reflected spectral signature, substituting physical inspection and chemical analysis with non-contact optical detection that is both faster and more reliable
Solution Approach 2:
The rugate tag provides self-authentication capability through its unique spectral signature embedded in its structure. The tag itself serves as the authentication mechanism by reflecting specific wavelengths of light according to its rugate profile, eliminating the need for external authentication equipment or complex verification procedures
2Measurement precision
If complex quality assurance protocols are used, then product identity accuracy is improved, but time and cost increase
Solution Approach 1:
The rugate tag's spectral signature is predetermined and embedded during manufacturing. This preliminary encoding of identification information in the optical structure allows for immediate authentication without requiring complex quality assurance protocols or time-consuming analysis procedures
Solution Approach 2:
The patent replaces time-consuming chemical analyses and statistical sampling with rapid optical spectral measurement. The spectrometer captures the entire spectral signature in a single measurement, providing high-precision identity verification instantaneously without the need for sequential testing procedures
3Measurement precision
If statistical sampling and chemical analyses are used, then product verification accuracy is improved, but cost and effort increase
Solution Approach 1:
The patent substitutes complex chemical analysis equipment and procedures with a simple optical system consisting of a broadband light source and spectrometer. This measurement system captures the spectral signature reflected from the rugate tag, providing accurate verification without requiring chemical reagents, sampling equipment, or complex analytical instruments
Solution Approach 2:
The rugate tag creates an optical copy or representation of its identity through its spectral signature. Instead of physically analyzing the product contents through chemical methods, the system measures the optical reflection pattern that encodes the product identity, providing an indirect but accurate verification method that is simpler and equally precise
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 system allows for accurate and efficient authentication of products, reducing counterfeiting risks and costs by using passive, edible, and biologically inert tags that can be integrated into products or packaging, providing a high level of security and ease of use.
Implementation Method 1
A system for wide-range spectral measurement is disclosed. The system comprises one or more broadband sources, an adjustable Fabry-Perot etalon, and a detector. The one or more broadband sources are to illuminate a sample, wherein the one or more broadband sources have a short broadband source coherence length. The adjustable Fabry-Perot etalon is to optically process the reflected light to extract spectral information with fine spectral resolution.
Implementation Method 2
The adjustable Fabry-Perot etalon is to optically process the reflected light to extract spectral information with fine spectral resolution. The detector is to detect reflected light from the sample, wherein the reflected light is comprised of multiple narrow-band subsets of the illumination light having long coherence lengths and is optically processed using a plurality of settings for the adjustable Fabry-Perot etalon.
Data Source
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AI summary
A system for wide-range spectral measurement includes one or more broadband sources, an adjustable Fabry-Perot etalon, and a detector. The one or more broadband sources is to illuminate a sample, wherein the one or more broadband sources have a short broadband source coherence length. The adjustable Fabry-Perot etalon is to optically process the reflected light to extract spectral information with fine spectral resolution. The detector is to detect reflected light from the sample, wherein the reflected light is comprised of multiple narrow-band subsets of the illumination light having long coherence lengths and is optically processed using a plurality of settings for the adjustable Fabry-Perot etalon, and wherein the plurality of settings includes a separation of the Fabry-Perot etalon plates that is greater than the broadband source coherence length but that is less than the long coherence lengths.