Multiplexed LED Optical Axis for Stable Two-Wavelength Analysis
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Solution Overview
Problem
When LEDs are used as light sources for absorption analysis in automatic analyzers, achieving stable light intensity over a wide wavelength band and matching temperature characteristics of multiple LED elements is challenging, particularly in maintaining accurate analysis performance through two-wavelength measurement methods.
Innovation Solution
The configuration involves multiplexing the light emitted from a second LED onto the same optical axis as the first LED, with both LEDs in contact with a shared temperature adjustment member to stabilize their temperature characteristics and ensure accurate light intensity distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple analysis devices are arranged in a matrix array to perform parallel analysis, then analysis productivity is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines multiple analysis devices into a single integrated automated analysis device. The device includes multiple analysis units (first analysis unit with first wavelength selector, second analysis unit with second wavelength selector) that are merged into one system sharing common components like the sample introduction system, nebulizer, and detection system. This merging maintains parallel analysis capability while reducing overall device complexity and space requirements compared to separate matrix array devices.
Solution Approach 2:
The automated analysis device is designed with multi-functionality to perform various types of spectral analysis (atomic absorption, atomic emission, inductively coupled plasma) using a single platform. The device can analyze multiple elements simultaneously through different wavelength selectors and analysis units, making one device serve multiple functions that would otherwise require multiple specialized devices.
2Productivity
If conventional automated analysis devices are used, then analysis speed is improved, but spectral line interference from other elements increases measurement error
Solution Approach 1:
The device extracts and separates the light paths for different wavelength regions using multiple wavelength selectors (first wavelength selector for one wavelength region, second wavelength selector for another wavelength region). This extraction of specific wavelength bands allows selective measurement of target element spectral lines while excluding interference from other elements' spectral lines, thereby maintaining fast analysis speed while improving measurement precision.
Solution Approach 2:
The patent introduces wavelength selectors as intermediary components between the light source and detector. These wavelength selectors act as mediators that selectively transmit only the desired wavelength ranges corresponding to target element spectral lines while blocking other wavelengths. This intermediary mechanism enables fast simultaneous multi-element analysis while eliminating spectral line interference that would otherwise degrade measurement precision.
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 configuration achieves stable light intensity over a wide wavelength band and ensures accurate temperature matching of LED elements, enhancing the reliability and accuracy of absorption analysis by minimizing light intensity fluctuations and maintaining high analysis performance.
Implementation Method 1
a first wavelength selector that transmits electromagnetic radiation in a first wavelength region and a second wavelength selector that transmits electromagnetic radiation in a second wavelength region
Data Source
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AI summary
Provided is an automatic analysis device capable of obtaining a stable light intensity over a wide wavelength band by multiplexing a plurality of LED lights and adjusting the temperature characteristics of each LED element. The automatic analysis device according to the present disclosure is configured such that light emitted from a second LED is reflected to be multiplexed on the same optical axis as the light emitted from a first LED, and the first LED and the second LED are in contact with the same temperature adjustment member.