Spectrocolorimetric Device Reflectance Conversion Rule
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Solution Overview
Problem
Existing spectrocolorimetric devices face challenges in accurately converting spectral reflectance measurements due to deviations in linearity and spectral sensitivity, requiring a large number of calibration samples and complex operations, which affects conversion accuracy and efficiency between different devices.
Innovation Solution
A spectrocolorimetric device with a light source, light-receiving unit, calculation unit, storage unit, acquisition unit, and conversion unit that measures spectral reflectance and adjusts for reflectance differences at each wavelength to convert measurements between different devices, using a simplified method to set a highly accurate conversion rule.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of calibration samples are used to improve conversion accuracy between different spectrocolorimetric devices, then measurement precision improves, but device complexity and operation time increase
Solution Approach 1:
The patent changes the calibration approach from using multiple calibration samples to using a single calibration sample with reflectance of 50% or more. The conversion accuracy is improved not by increasing sample quantity but by selecting a specific reflectance parameter range (50% or more) that provides better conversion results between different devices.
Solution Approach 2:
The patent extracts the essential calibration requirement from the complex multi-sample process. Instead of requiring multiple calibration samples across different reflectance ranges, it identifies that a single sample with reflectance of 50% or more is sufficient to establish the conversion relationship between different spectrocolorimetric devices.
2Measurement precision
If multiple calibration samples with different reflectance ranges are used to improve conversion accuracy, then measurement precision improves, but the number of calibration operations increases
Solution Approach 1:
The patent changes the calibration parameter from requiring multiple samples with varying reflectance to using a single sample with reflectance of 50% or more. This parameter change reduces calibration time while maintaining or improving conversion accuracy through the specific reflectance threshold selection.
Solution Approach 2:
The patent performs preliminary analysis to determine that a reflectance threshold of 50% or more is optimal for conversion. This preliminary finding allows the calibration process to be simplified to a single sample measurement, eliminating the need for time-consuming multi-sample calibration sequences.
3Measurement precision
If complex calibration operations are performed to improve conversion accuracy between different devices, then measurement precision improves, but ease of operation deteriorates
Solution Approach 1:
The patent simplifies the calibration operation by changing the requirement from multiple samples with different reflectance characteristics to a single sample with reflectance of 50% or more. This parameter change makes the calibration process easier to operate while achieving accurate conversion between different spectrocolorimetric devices.
Solution Approach 2:
The patent enables the calibration process to be self-sufficient with a single calibration sample. The device can automatically perform the conversion calibration without requiring the operator to prepare multiple calibration samples or perform complex calibration sequences, improving ease of operation.
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
Enables easy and accurate conversion of spectral reflectance measurements between different spectrocolorimetric devices, reducing the need for numerous calibration samples and complex operations while improving conversion accuracy.
Implementation Method 1
a light-receiving unit that spectroscopically disperses reflected light, which is generated on a surface of an object according to irradiation of the object with illumination light emitted from a light source, and measures a spectroscopic spectrum
Data Source
AI summary
Spectrocolorimetric device includes a light source, a light-receiving unit, a calculation unit, a storage unit, an acquisition unit, and a conversion unit. The light-receiving unit spectroscopically disperses reflected light generated on a surface and measures a spectroscopic spectrum relating to the reflected light. The calculation unit calculates a first spectral reflectance from the spectroscopic spectrum. The storage unit stores relationship information indicating a relationship between a reflectance and a reflectance difference for each wavelength. The acquisition unit acquires reflectance difference for each wavelength between the first spectral reflectance acquired using the spectrocolorimetric device and a second spectral reflectance acquired using a destination-of-conversion spectrocolorimetric device on the basis of the first spectral reflectance and the relationship information. The conversion unit converts the first spectral reflectance into the second spectral reflectance by adding or subtracting the reflectance difference for each wavelength acquired by the acquisition unit to or from the first spectral reflectance.