Spectral Apparatus Calibration via Mechanical Error Linear Model
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Solution Overview
Problem
Existing wavelength calibration methods for spectral apparatuses, which use linear functions of pixel number to approximate spectral sensitivity, often fail to provide precise results due to significant deviations, leading to inaccurate spectral sensitivity measurements.
Innovation Solution
A spectral apparatus calibration method that accounts for mechanical errors using a linear function model to adapt spectral sensitivity, expressed through indicators of mechanical error, ensuring precise spectral sensitivity measurements by adjusting for deviations in the optical system and light-receiving sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a linear function of pixel number is used to approximate spectral sensitivity, then the calibration process is simple, but the measurement precision deteriorates due to considerable deviations
Solution Approach 1:
The patent changes the parameter from pixel number to mechanical error indicator. By expressing spectral sensitivity deviation as a linear function of mechanical error indicator rather than pixel number, the system maintains simplicity while improving accuracy. The mechanical error indicator captures the actual physical deviations in the optical system, allowing for more precise calibration without increasing computational complexity.
2Measurement precision
If a higher order function (quadratic or more) is used to express spectral sensitivity deviation, then the measurement precision improves, but the adaptability deteriorates due to great changes in calculated relative output
Solution Approach 1:
The patent introduces a new parameter - mechanical error indicator - that linearly relates to spectral sensitivity deviation. This parameter change allows the system to maintain linearity (and thus adaptability) while achieving high precision through the physical meaning of the mechanical error indicator, which directly represents actual deviations in the optical system.
Solution Approach 2:
The mechanical error indicator acts as an intermediary between the physical mechanical deviations in the optical system and the spectral sensitivity calculations. By using this intermediary parameter, the system can accurately represent complex physical deviations through a simple linear relationship, avoiding the need for higher order functions that would reduce adaptability.
3Device complexity
If the spectral sensitivity is not precisely acquired, then the calibration process remains simple, but the reliability of spectral measurements deteriorates
Solution Approach 1:
The calibration system uses the actual mechanical error indicator of the optical system to self-correct spectral sensitivity deviations. By incorporating the mechanical error indicator directly into the calibration process, the system automatically compensates for physical deviations without requiring complex external calibration procedures, thereby maintaining simplicity while improving reliability.
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 allows for precise and appropriate spectral sensitivity acquisition, maintaining adaptability even with varying mechanical errors, thereby enhancing the accuracy of spectral measurements.
Implementation Method 1
an optical system that converts light to be measured into a spectrum
Implementation Method 2
a light-receiving sensor including a plurality of sensors that output a plurality of signals, the plurality of sensors including sensors that output signals indicating the respective energy amounts of a plurality of wavelength components
Data Source
AI summary
Creating a model calibrating spectral apparatus having an optical system that converts light to be measured into a spectrum, and a light-receiving sensor including a plurality of sensors that outputs signals, the sensors include sensors that output signals indicating respective energy amounts of a plurality of wavelength components. The model shows where a linear function of an indicator indicating a mechanical error in the spectral apparatus, expresses deviation of an indicator indicating spectral sensitivity of the sensor from the indicator indicating the reference spectral sensitivity of the sensor. The method comprises: a) acquiring reference spectral sensitivity; b) acquiring an indicator indicating the reference spectral sensitivity of the sensor acquired at a); and c) creating the model where the linear function of the mechanical error indicator expresses deviation of the spectral sensitivity indicator from the indicator indicating the reference spectral sensitivity of the sensor, acquired at b).