Miniaturized Spectrometer Drift Compensation Using Correction Matrices
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Solution Overview
Problem
Existing spectrometry methods struggle with instrumental response drifts due to environmental changes, requiring frequent background measurements and specialist intervention, which is time-consuming and prone to errors.
Innovation Solution
A spectrometer with a light modulator, detector, sensor, and processor that applies a correction matrix to compensate for instrumental drifts, using a correction matrix generated during production or based on real-time environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequent background measurements are taken to compensate for instrumental drift, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The correction matrix is pre-calculated during instrument manufacturing by measuring the spectral response at multiple known temperatures. This preliminary characterization allows the system to predict and correct for temperature-induced drift without requiring frequent background measurements during operation, thus resolving the contradiction between measurement precision and time loss.
Solution Approach 2:
The patent replaces the traditional mechanical approach of taking frequent background measurements with a computational approach using a correction matrix. Instead of physically re-measuring the background spectrum at each temperature change, the system uses pre-calculated correction factors applied to the raw spectrum, eliminating the time-consuming background measurement step while maintaining precision.
2Measurement precision
If post-processing algorithms are used to compensate for instrumental errors, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The complex post-processing algorithms are replaced by pre-calculated correction matrices generated during manufacturing. The intricate error compensation logic is performed once during instrument setup, and then simple matrix multiplication is applied during operation, reducing both computational complexity and processing time while maintaining measurement precision.
3Measurement precision
If specialist intervention is used to process spectrometry data, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The spectrometer performs automatic temperature compensation using the correction matrix without requiring specialist intervention. The instrument self-corrects for temperature drift by applying the pre-calculated correction factors to the measured spectra, enabling non-expert users to obtain accurate results without needing to understand or perform complex post-processing operations.
Data Source
AI summary
Aspects relate to on-line compensation of instrumental drifts in miniaturized spectrometers due to variations in environmental conditions and due to other sources of instrumental drift. The spectrometer may include a light modulator, a detector, and a processor. The spectrometer may further include a sensor configured to obtain a value of a condition contributing to instrumental drifts in the spectrometer. The processor may be configured to extract a set of correction parameters from a correction matrix associating a plurality of sets of correction parameters with sensor values based on the value and to apply the set of correction parameters to an output of the detector to produce a corrected spectrum of a sample under test. The correction matrix may be generated for the spectrometer or may be based on a global correction matrix fitted to the spectrometer.