2D Optical Spectrum Drift Correction via Peak Pattern Analysis
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Solution Overview
Problem
Existing methods for determining peak position measurement offsets in two-dimensional optical spectra are inadequate, especially under varying environmental conditions and when reference peaks are surrounded by sample peaks, leading to potential drift correction failures.
Innovation Solution
The approach uses a pattern formed by multiple peaks to estimate the drift, allowing for linear and/or non-linear offsets to be measured. This method involves identifying a plurality of peaks in both reference and sample spectra, forming a polygon shape with these peaks, and using image registration or machine learning algorithms to determine the offset based on changes in the pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single reference peak is used to estimate drift, then the method is simple to implement, but the measurement becomes unreliable when peaks are saturated, interfered with, or excessively displaced
Solution Approach 1:
The patent segments the drift estimation process by using multiple reference peaks distributed across different regions of the spectrum rather than relying on a single peak. Each peak provides an independent measurement, and the overall drift is calculated by combining these segmented measurements, thereby improving reliability without significantly increasing implementation complexity
Solution Approach 2:
The patent transitions from one-dimensional drift estimation (single peak) to two-dimensional drift estimation by utilizing multiple peaks across different spectral dimensions. This dimensional expansion allows the system to measure drift more robustly by analyzing peak positions in both wavelength and spatial dimensions simultaneously
2Stability of the object's composition
If thermal decoupling of plasma from optical tank is implemented, then drift is reduced, but device complexity and material costs increase
Solution Approach 1:
The patent replaces complex mechanical thermal decoupling systems with a computational drift correction method. Instead of physically isolating the plasma from the optical tank using complex thermal management hardware, the system uses algorithms to measure and correct for thermal drift effects, thereby achieving thermal stability compensation with significantly reduced device complexity
Solution Approach 2:
The patent changes the approach from physical parameter control (temperature stabilization) to computational parameter adjustment (drift correction). By measuring the actual drift caused by thermal effects and applying computational corrections to the spectral data, the system achieves stable measurements without requiring complex thermal control hardware
3Measurement precision
If multiple peaks are used to form a pattern for drift estimation, then measurement precision improves, but the complexity of determining offset increases
Solution Approach 1:
The patent merges multiple individual peak position measurements into a unified drift estimation by combining the information from all reference peaks. The system integrates the positional data from multiple peaks to calculate an overall drift value, thereby improving measurement precision through aggregation while managing complexity through systematic combination procedures
Data Source
AI summary
A peak position measurement offset is determined in a two-dimensional optical spectrum. A plurality of peaks are identified that appear in both a spectrum obtained from a reference material at known conditions and a spectrum obtained from a sample of interest. The peak position measurement offset is determined by a comparison of a pattern formed by peak positions of the plurality of identified peaks in the spectrum obtained from the sample of interest against the plurality of identified peaks in the spectrum obtained from the reference material.