Spectroscopic Analysis Device Stray Light Correction
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Solution Overview
Problem
Spectroscopic analysis devices face challenges in effectively reducing the impact of stray light on analysis, as a fixed stray light correction value does not accurately account for varying light quantities across different wavelengths, leading to non-linear absorbance measurements.
Innovation Solution
A spectroscopic analysis device and method that computes the stray light ratio at a specified wavelength and uses unique coefficients for each wavelength to calculate the stray light quantity, allowing for precise correction of light quantities at each wavelength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed stray light correction value is used for all wavelengths, then the correction process is simple, but the linearity of absorbance measurements deteriorates in both high and low absorbance regions
Solution Approach 1:
The patent applies local quality by making the stray light correction value wavelength-dependent rather than uniform. Each wavelength region receives a correction value tailored to its specific characteristics, with the correction amount being dynamically adjusted based on the ratio of stray light to received light at each wavelength, thereby maintaining measurement linearity across different absorbance regions
Solution Approach 2:
The patent implements dynamics by making the correction value adaptive rather than static. The correction value changes dynamically based on the measured light quantities at different wavelengths, automatically adjusting to maintain optimal correction effectiveness across the entire spectral range without requiring manual intervention
2Productivity
If the stray light quantity is measured at a reference wavelength and applied as a fixed correction value, then the measurement process is efficient, but the correction accuracy deteriorates when light quantity varies across wavelengths
Solution Approach 1:
The patent applies parameter changes by transforming the correction approach from using a single fixed parameter (stray light quantity at reference wavelength) to using multiple dynamic parameters (ratio of stray light to received light at each wavelength). This allows the correction to adapt to varying light quantities across different wavelengths while maintaining measurement efficiency through automated calculation
3Ease of operation
If stray light correction is performed without considering wavelength-specific light quantities, then the analysis process is straightforward, but the reliability of analysis results deteriorates in wavelength regions with high absorbance
Solution Approach 1:
The patent applies segmentation by dividing the spectral range into different wavelength regions and applying appropriate correction values to each segment. The correction is segmented based on wavelength-specific characteristics, ensuring that each wavelength region receives correction treatment optimized for its specific light quantity and absorbance properties
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 enables accurate computation and correction of stray light at each wavelength, effectively reducing its impact on analysis and maintaining linearity across different absorbance regions.
Implementation Method 1
light which has passed through a sample in an optical path is separated by a spectroscope
Implementation Method 2
lights of different wavelengths are received with respective different light receiving elements to compute the quantity of light of each wavelength
Data Source
AI summary
A stray light ratio computation unit computes the stray light ratio at a specified wavelength based on the quantity of light at the specified wavelength computed by light quantity computation unit in a state where there is no sample having absorption in the light path and the quantity of light at the specified wavelength computed by light quantity computation unit when the light is transmitted through a sample having absorption at the specified wavelength. Stray light quantity computation unit computes the quantity of stray light at each wavelength through computations using the stray light ratio at the specified wavelength and different unique values for each wavelength (for example, different coefficients for each wavelength, stored in coefficient storage unit).