Raman Spectroscopy System for Threat Agent Detection
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Solution Overview
Problem
Current detection and identification methods for hazardous agents are time-consuming, labor-intensive, and costly, with conventional optical and spectroscopic techniques suffering from limited sensitivity and specificity, and requiring separate instrumentation for detection and identification.
Innovation Solution
A reagent-free system using Raman spectroscopy and Raman imaging spectroscopy for simultaneous detection and identification of threat agents with a single illumination source, employing a fiber array spectral translator to convert non-linear fields of view into curvilinear maps for spatially-resolved Raman spectra analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If separate instrumentation is used for detection and identification of threat agents, then detection and identification can be performed, but system complexity increases and time between detection and identification increases
Solution Approach 1:
The patent combines detection and identification functions into a single integrated system. The Raman spectroscopy system simultaneously performs detection (measuring scattered light intensity) and identification (analyzing spectral fingerprints) using one illumination source and one detection apparatus, eliminating the need for separate instrumentation and reducing time between these functions.
Solution Approach 2:
The Raman spectroscopy system is designed to perform multiple functions simultaneously: it detects the presence of threat agents through elastic scattering while also identifying them through Raman scattering spectral analysis. This multi-functional approach allows a single system to handle both detection and identification tasks that previously required separate instruments.
2Measurement precision
If conventional optical and spectroscopic methods are used for detection, then detection can be performed, but sensitivity and specificity are limited
Solution Approach 1:
The patent utilizes Raman scattering, a specific optical parameter change, to achieve high sensitivity and specificity. By measuring the frequency-shifted Raman scattered light rather than conventional elastic scattered light, the system can detect and identify threat agents with higher precision, as Raman scattering provides molecular fingerprint information that is highly specific to the chemical composition of the target.
3Measurement precision
If reagent-based identification methods are used, then identification specificity is high, but time consumption and labor intensity increase
Solution Approach 1:
The patent replaces reagent-based chemical identification methods with optical spectroscopy. Instead of using physical reagents that require incubation, mixing, and visual or instrumental reading, the system uses Raman spectroscopy to obtain molecular fingerprints directly from the sample, eliminating the time-consuming and labor-intensive steps of reagent-based methods while maintaining high specificity.
4Measurement precision
If imaging spectroscopy switches from broad band light source to monochromatic light source, then spectroscopic imaging can be performed, but time period between detection and identification increases
Solution Approach 1:
The patent employs a single illumination source that continuously provides both broad spectral coverage for imaging and specific wavelengths for spectroscopy. The system maintains continuous illumination without switching between different light sources, allowing simultaneous detection and identification operations to proceed without interruption, thereby eliminating time delays associated with source switching.
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 rapid and accurate identification of threat agents coincident with sample deposition, reducing system complexity and time between detection and identification, while improving sensitivity and specificity.
Implementation Method 1
illuminated, via a single illumination source, with a plurality of photons to thereby produce elastic scattered photons and Raman scattered photons
Implementation Method 2
illuminated, via a single illumination source, with a plurality of photons to thereby produce elastic scattered photons and Raman scattered photons
Data Source
AI summary
A system and method for depositing a sample of a threat agent is deposited onto a substrate. The threat agent is identified substantially coincident in time with the depositing of the sample of the threat agent onto the substrate.