Analyzing Apparatus Wavelength-Dependent Load Angle Optimization
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Solution Overview
Problem
In automatic analyzers, increasing the load angle to secure sufficient light amount for analysis in the ultraviolet region leads to increased scattered light, narrowing the measurable concentration range, while reducing the load angle to minimize scattered light results in insufficient light amount, posing a challenge in achieving precise analysis.
Innovation Solution
The solution involves adjusting the load angle per wavelength, with wavelengths having higher light amounts set to smaller load angles and those with lower light amounts set to larger load angles, using a slit arrangement between the light dispersing portion and light receiving elements to manage scattered light, particularly employing a halogen light source and diffraction grating, and optimizing the slit configuration to maintain accurate light measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the load angle is increased to secure sufficient light amount in the ultraviolet region, then the light amount for analysis is improved, but the scattered light increases and the measurable concentration range is narrowed
Solution Approach 1:
The patent applies local quality by differentiating the load angle settings for different wavelength regions. Specifically, the load angle is set to a first value for wavelengths where scattered light is problematic and a second value (larger than the first) for wavelengths where light amount is insufficient. This localized optimization resolves the contradiction by allowing each wavelength region to have the optimal load angle for its specific requirements.
Solution Approach 2:
The patent changes the parameter of load angle based on wavelength characteristics. By adjusting the load angle parameter differently for ultraviolet wavelengths (where scattered light is an issue) versus visible wavelengths (where light amount is more critical), the system optimizes both measurement accuracy and light throughput across the spectrum.
2Measurement precision
If the load angle is reduced to minimize scattered light, then the measurement accuracy is improved, but the light amount becomes insufficient for precise analysis
Solution Approach 1:
The patent applies local quality by differentiating the load angle settings for different wavelength regions. Specifically, the load angle is set to a first value for wavelengths where scattered light is problematic and a second value (larger than the first) for wavelengths where light amount is insufficient. This localized optimization resolves the contradiction by allowing each wavelength region to have the optimal load angle for its specific requirements.
Solution Approach 2:
The patent changes the parameter of load angle based on wavelength characteristics. By adjusting the load angle parameter differently for ultraviolet wavelengths (where scattered light is an issue) versus visible wavelengths (where light amount is more critical), the system optimizes both measurement accuracy and light throughput across the spectrum.
3Measurement precision
If a fixed light amount is secured across all wavelengths, then the analysis accuracy is maintained, but the dynamic range of measurable concentrations is limited due to scattered light interference
Solution Approach 1:
The patent applies local quality by differentiating the load angle settings for different wavelength regions. Specifically, the load angle is set to a first value for wavelengths where scattered light is problematic and a second value (larger than the first) for wavelengths where light amount is insufficient. This localized optimization resolves the contradiction by allowing each wavelength region to have the optimal load angle for its specific requirements.
Solution Approach 2:
The patent applies dynamics by making the load angle adjustable and wavelength-dependent rather than fixed. The system can dynamically select appropriate load angle values based on the wavelength being measured, enabling adaptation to different measurement conditions and expanding the usable dynamic range across the spectrum.
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 enhances the dynamic range of measurable concentrations while maintaining analysis accuracy, particularly in scenarios with scattered light, by ensuring a fixed light amount is secured across various wavelengths, effectively addressing the trade-off between light quantity and scattered light interference.
Implementation Method 1
a light source irradiating lights having different light amounts about at least two different wavelengths to the cell
Implementation Method 2
a light dispersing portion dispersing the light transmitting through the cell
Implementation Method 3
employing a halogen light source and diffraction grating
Implementation Method 4
a plurality of light receiving elements receiving the dispersed lights and having different central wavelengths of the detected lights
Implementation Method 5
using a slit arrangement between the light dispersing portion and light receiving elements to manage scattered light
Data Source
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AI summary
A light amount is increased and an analyzing accuracy can be increased in accordance with an enlargement of a load angle.. However, scattered light tends to be loaded into a light receiving element in an analysis accompanied by scattered light, and the dynamic range of a concentration which can be measured becomes narrow. In the invention, light is dispersed by a light dispersing portion (20), a load angle of the received light is changed per wavelength, the load angle is made larger for light of a wavelength having a small light amount, and the load angle is made smaller for light of a wavelength having a large light amount and used for an analysis accompanied by scattered light. Accordingly, it is possible to gain a dynamic range of a concentration which can be measured in the analysis accompanied by scattered light, while increasing the light amount and maintaining the analyzing accuracy.