Raman Reader With Adjustable Dispersing Element
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Solution Overview
Problem
Traditional Raman spectrometers require scanning entire spectra for identification, which is inefficient and prone to mechanical instabilities, especially when dealing with a limited number of known spectral features or tags, leading to reduced sensitivity and increased noise.
Innovation Solution
A Raman reader that rapidly scans for specific anticipated Raman feature regions using a single channel detector and adjustable dispersing element, synchronized with a light source, allowing for precise identification with a high signal-to-noise ratio and maintaining accurate frequency calibration, thereby focusing on known spectral features rather than the entire spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional Raman spectrometers scan entire spectra for identification, then comprehensive spectral information is obtained, but scanning time increases and mechanical instabilities are introduced
Solution Approach 1:
The patent extracts and focuses only on specific anticipated Raman feature regions rather than scanning the entire spectrum. The adjustable dispersing element is positioned to direct only the relevant spectral features onto the detector, eliminating unnecessary scanning of irrelevant spectral regions and reducing scanning time while maintaining identification accuracy.
Solution Approach 2:
The system performs preliminary action by pre-positioning the adjustable dispersing element to target known spectral feature regions before detection begins. This allows the spectrometer to directly scan for anticipated Raman features without requiring a full spectral scan, thereby reducing scanning time while maintaining measurement precision.
2Measurement precision
If traditional Raman spectrometers scan entire spectra, then all spectral features are captured, but mechanical instabilities and noise increase
Solution Approach 1:
The patent extracts only the necessary spectral information by positioning the adjustable dispersing element to direct specific Raman feature regions onto the detector. This eliminates the need for extensive mechanical scanning across the entire spectrum, reducing mechanical instabilities and improving signal-to-noise ratio by focusing detection resources on relevant features only.
3Productivity
If rapid scanning of specific features is performed, then scanning speed increases and signal-to-noise ratio improves, but frequency calibration accuracy may be compromised
Solution Approach 1:
The patent employs feedback mechanisms through synchronized operation of the light source and detector, and by using a calibration detector to determine set points for the adjustable dispersing element. This feedback system maintains accurate frequency calibration even during rapid scanning by continuously referencing known calibration signals and adjusting the dispersing element position accordingly.
Solution Approach 2:
The system performs preliminary calibration by using a calibration detector to establish set points for the adjustable dispersing element before rapid scanning begins. This preliminary action ensures that frequency calibration is maintained during high-speed operation, allowing rapid scanning without compromising measurement precision.
4Device complexity
If a single channel detector is used with adjustable dispersing element, then device complexity is reduced and sensitivity increases, but the ability to capture full spectrum is lost
Solution Approach 1:
The patent employs a dynamic adjustable dispersing element that can be rapidly repositioned to target different spectral feature regions. This dynamic capability allows a single channel detector to effectively capture multiple specific spectral features by sequentially positioning the dispersing element, providing spectral coverage capability comparable to array detectors while maintaining lower device complexity.
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
This approach significantly enhances the sensitivity and speed of Raman feature identification, reducing noise and mechanical instability issues, enabling efficient detection of tags or analytes even at low concentrations and improving signal-to-noise ratios.
Implementation Method 1
an adjustable dispersing element for directing one or more spectral features of the spectroscopy signal to the at least one single channel detector
Implementation Method 2
a calibration detector adapted to determine a set point of the adjustable dispersing element
Implementation Method 3
A sampled spectrum is then matched against a library of known Raman spectra to identify the sample of unknown material
Data Source
AI summary
A spectroscopic system is provided. In one embodiment, the spectroscopic system comprises a light source adapted to provide a beam of illumination; an optical system adapted to provide the beam of illumination to a sample and receive a spectroscopy signal from the sample and direct the spectroscopy signal to at least one single channel detector, wherein the optical system comprises an adjustable dispersing element for directing one or more spectral features of the spectroscopy signal to the at least one single channel detector; a calibration detector adapted to determine a set point of the adjustable dispersing element; and a source synchronization component adapted to synchronize an operation of the light source and the at least one single channel detector. A method of calibrating a dispersing element of a spectrometer is also provided.