Dual-Path Raman Spectroscopy Layout for Compact High-Resolution Sensing
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Solution Overview
Problem
Existing Raman spectroscopy instruments are bulky and costly, hindering applications that require miniaturization such as space exploration, on-site toxic substance inspection, and in-vivo diagnostics, due to high instrumentation requirements.
Innovation Solution
An apparatus for Raman spectroscopy that includes an optical system guiding laser beams to a sample and a reference sample, using a diffraction element to split spectra, with a detector array for simultaneous detection, and a beam blocker to prevent light interference between the samples, allowing for miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional Raman spectroscopy instruments are used to achieve high spectral resolution and sensitivity, then measurement precision is improved, but device complexity and size increase
Solution Approach 1:
The patent combines the reference sample measurement path with the sample measurement path in a single optical system. The beam splitter directs portions of the laser beam to both the reference sample and the sample simultaneously, merging two separate measurement functions into one integrated apparatus. This reduces device complexity while maintaining spectral resolution and sensitivity through simultaneous dual-path measurement.
2Measurement precision
If conventional Raman spectroscopy instruments are used to achieve high spectral resolution and sensitivity, then measurement precision is improved, but the instrument size and cost increase
Solution Approach 1:
The patent merges the reference channel and sample channel into a single compact optical system. By using a beam splitter to divide the laser beam and direct it to both reference and sample positions simultaneously, the apparatus achieves high spectral resolution in a miniaturized configuration, reducing the overall instrument volume compared to conventional separate-path systems.
Solution Approach 2:
The patent utilizes the spatial dimension by positioning the reference sample and the sample at different locations in the optical path. The beam splitter creates separate measurement paths in different spatial dimensions, allowing simultaneous measurement of reference and sample spectra without increasing the footprint of the instrument, thus enabling miniaturization while maintaining spectral resolution.
3Productivity
If simultaneous measurement of sample and reference spectra is implemented, then productivity is improved, but light interference between paths may occur
Solution Approach 1:
The patent extracts or removes the harmful light interference by introducing a beam blocker in the optical path. The beam blocker is strategically positioned to block stray light and prevent cross-contamination between the reference and sample measurement paths, thereby eliminating the harmful effect while maintaining simultaneous dual-path measurement capability for high productivity.
Solution Approach 2:
The beam blocker acts as an intermediary element in the optical system. It is placed between the beam splitter and the detectors to mediate the light paths, selectively blocking interfering light while allowing the desired spectral information to pass through to the detectors, thus enabling simultaneous measurement without cross-path interference.
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 miniaturized Raman spectroscopy capable of high spectral resolution and sensitivity, suitable for applications like in-vivo diagnostics and space exploration, while reducing costs and complexity.
Implementation Method 1
the diffraction element is configured to split the first spectrum beam into a first spectrum of spatially separated wavelength components associated with the sample and to split the second spectrum beam into a second spectrum of spatially separated wavelength components associated with the reference sample
Implementation Method 2
a first spectrum beam is generated from an interaction between the first portion of the laser beam and the sample and a second spectrum beam is generated from an interaction between the second portion of the laser beam and the reference sample
Data Source
AI summary
An apparatus including an optical system that guides a first portion of a laser beam to a sample and a second portion of the laser beam to a reference sample. A first spectrum beam generated from an interaction between the first portion and the sample and a second spectrum beam generated from an interaction between the second portion and the reference sample. The optical system guides the first and second spectrum beams to a diffraction element that splits the first spectrum beam into a first spectrum of spatially separated wavelength components associated with the sample and splits the second spectrum beam into a second spectrum of spatially separated wavelength components associated with the reference sample. A detector detects the first and second spectrum. A beam blocker prevents light propagating from the reference sample to the sample and/or from the sample to the reference sample.