Curved Spectroscopic Element X-ray Analysis
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Solution Overview
Problem
The existing X-ray spectroscopic analysis apparatuses face accuracy issues in detecting characteristic X-rays due to the long spectral surface length of the spectroscopic element, which leads to decreased detection precision, especially at areas distant from the Rowland circle, as a result of differing radii of curvature between the spectroscopic element and the Rowland circle.
Innovation Solution
The apparatus includes a curved spectroscopic element and a position-sensitive detector disposed along a Rowland circle, with the spectroscopic element's spectral surface length being shorter than the irradiation surface, allowing for separation of characteristic X-rays within a common spectral range, thereby improving detection accuracy by limiting the effective spectral range to the vicinity of the Rowland circle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the spectral surface length of the spectroscopic element is increased to cover all peak wavelengths, then the spectral coverage is improved, but the detection accuracy deteriorates in areas distant from the Rowland circle
Solution Approach 1:
The patent divides the spectral analysis into multiple segments by using a plurality of spectroscopic elements, each responsible for a specific spectral range. This segmentation allows each element to maintain high detection accuracy within its designated range while collectively covering the entire spectral range of interest, thus resolving the contradiction between spectral coverage and detection accuracy.
Solution Approach 2:
The patent applies local quality by optimizing each spectroscopic element's spectral surface length to match its specific spectral range requirements. Instead of using one long spectral surface for all wavelengths, each element has a locally optimized spectral surface length that ensures high detection accuracy for its specific wavelength range, preventing the accuracy deterioration that occurs in distant areas of a long spectral surface.
2Length of stationary object
If the spectral surface length is made long to cover all characteristic X-ray wavelengths, then the full spectral range is captured, but the radius of curvature difference causes accuracy loss
Solution Approach 1:
The patent segments the long spectral surface requirement into multiple shorter spectral surfaces, each corresponding to a specific spectral range. This segmentation allows each spectroscopic element to have a manageable spectral surface length that maintains manufacturing precision and detection accuracy, while the combination of multiple elements achieves the full spectral coverage that would otherwise require an excessively long single spectral surface.
3Device complexity
If a single spectroscopic element covers the full spectral range, then the device complexity is reduced, but the detection accuracy deteriorates
Solution Approach 1:
The patent accepts the increased device complexity of using multiple spectroscopic elements as necessary to maintain high detection accuracy. Each element is optimized for a specific spectral range, ensuring that detection accuracy is preserved. The segmentation approach prioritizes measurement precision over device simplicity, using multiple specialized elements rather than one general-purpose element with compromised performance.
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 enhances the accuracy of detecting characteristic X-rays, reduces manufacturing costs, allows for easier inspection of spectroscopic element defects, and prevents peak shifts, ensuring precise valence analysis of elements in samples.
Implementation Method 1
separates the group of characteristic X-rays
Implementation Method 2
detects at least some of the group of characteristic X-rays separated by the spectroscopic element
Data Source
AI summary
A spectroscopic element and a detector are disposed along a circumference of one Rowland circle. The spectroscopic element has a spectral surface whose length, measured along the Rowland circle, is shorter than a length in the Rowland circle plane, of an irradiation surface irradiated with excitation beams emitted to a sample holder. The spectroscopic element and the sample holder are disposed to separate a group of characteristic X-rays within a common spectral range of the spectroscopic element.