Microscopic Raman Optics Alignment for Stable Signal-to-Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The optical paths in microscopic Raman spectroscopy devices are prone to displacement due to environmental disturbances such as temperature changes and vibrations, leading to a reduction in the amount of Raman scattering light guided to the spectroscopic section and a decrease in the signal-to-noise ratio of spectroscopic measurements.
Innovation Solution
A microscopic Raman spectroscopy device with an adjusting mechanism that includes a movable mirror and a control unit to align the spot image of Raman scattering light with an aperture, maximizing the light intensity entering the spectrometer, even when optical paths are displaced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If precise optical path adjustment is performed once, then initial measurement accuracy is improved, but the system becomes sensitive to environmental disturbances causing positional deviation
Solution Approach 1:
The patent implements a feedback mechanism where the detection unit continuously monitors the position of Raman scattering light on the aperture, and the adjustment unit automatically corrects positional deviations by moving optical components. This closed-loop feedback system maintains optimal optical path alignment despite environmental disturbances such as temperature changes and vibrations.
Solution Approach 2:
The patent transitions from a static optical alignment system to a dynamic one by introducing movable optical components (such as mirrors or lenses) that can be actively adjusted in real-time. This allows the system to adapt to changing environmental conditions and maintain measurement quality continuously rather than relying on a single initial adjustment.
2Measurement precision
If optical path is adjusted for maximum light intensity, then signal-to-noise ratio is improved, but any displacement reduces the amount of Raman scattering light reaching the spectrometer
Solution Approach 1:
The detection unit monitors the actual position of Raman scattering light relative to the aperture, providing real-time feedback on light intensity optimization. When displacement is detected, the adjustment unit automatically repositions optical components to restore maximum light intensity, thereby maintaining high signal-to-noise ratio despite environmental disturbances.
Solution Approach 2:
The system performs preliminary adjustment of optical components to pre-establish optimal light intensity conditions before measurement begins. This preliminary optimization ensures that the system starts in a state of maximum signal transmission, and the feedback mechanism then maintains this state throughout operation.
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 device maintains a high signal-to-noise ratio by adjusting the relative positional relationship between the Raman scattering light and the aperture, ensuring consistent and accurate spectroscopic measurements despite disturbances.
Implementation Method 1
a wavelength discriminator of light such as a dichroic filter that reflects the excitation light emitted from the laser light source toward the sample and transmits the Raman scattering light emitted from the sample toward the spectrometer
Implementation Method 2
a condenser lens arranged between the wavelength discriminator of light and the spectrometer for condensing the Raman scattering light passing through the wavelength discriminator of light
Data Source
AI summary
Microscopic Raman spectroscopy device that detects and analyzes Raman scattering light emitted from sample irradiated with excitation light includes: laser light source that emits excitation light; spectrometer for measuring spectrum of the Raman scattering light; wavelength discriminator such as a dichroic filter that reflects the excitation light emitted from the laser light source toward the sample and transmits Raman scattering light emitted from the sample toward the spectrometer; condenser lens arranged between wavelength discriminator and the spectrometer for condensing the Raman scattering light passing through the wavelength discriminator; aperture arranged between the condenser lens and the spectrometer for limiting Raman scattering light incident on the spectrometer; adjusting means for adjusting to match a position of spot image of Raman scattering light condensed by condensing lens with a position of the aperture so that light amount of Raman scattering light passing through the aperture is maximized.