Spectral Background Light Subtraction for Outdoor Measurement
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Solution Overview
Problem
Spectral measurement devices struggle to accurately distinguish between light emitted from a measurement object and background light, especially in outdoor environments where various types of light (radiation, reflection, transmission, and scattering) interfere, making it difficult to identify the component of the measurement object.
Innovation Solution
The device and method involve predicting and storing spectral sensitivity characteristics of background light, using black-body radiation models and detector sensitivity, to estimate and subtract background light components from the measurement light, allowing for accurate spectral analysis of the object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If spectral measurement is performed outdoors using ambient light sources, then the measurement can be conducted in practical field conditions, but the background light interferes with the detection making it difficult to distinguish the measurement object's spectral characteristics
Solution Approach 1:
The measurement light is segmented into measurement object light and background light components. The processing unit separately identifies and processes these components by comparing measurement light spectral characteristics with stored background light spectral characteristic information, enabling precise extraction of the measurement object's spectral features despite strong background interference
Solution Approach 2:
Spectral characteristic information of background light is predicted and stored in advance in the storage unit. This preliminary action enables the processing unit to quickly identify and subtract background light components from measurement light during actual measurement, significantly improving the speed and accuracy of spectral analysis in outdoor conditions
2Productivity
If background light spectral characteristic information is predicted and stored in advance, then the processing speed and accuracy of spectral measurement is improved, but the device complexity increases due to additional storage and processing requirements
Solution Approach 1:
The system creates spectral characteristic information copies of background light and stores them in the storage unit. These spectral copies serve as reference data that enable rapid comparison and identification of background light components during measurement, improving processing speed without requiring complex real-time analysis algorithms
Solution Approach 2:
The storage unit stores spectral characteristic information that serves multiple functions: it acts as a reference for identifying background light components, enables subtraction of background interference, and provides baseline data for various types of measurement objects. This multi-functional approach reduces the need for separate processing systems for different measurement scenarios
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 enables precise measurement of spectral characteristics of the measurement object by accounting for and subtracting background light interference, enhancing the accuracy of qualitative and quantitative analysis.
Implementation Method 1
a spectral optical system configured to disperse light emitted from a measurement object
Implementation Method 2
a detector configured to detect the intensity of each light dispersed by the spectral optical system
Implementation Method 3
using black-body radiation models and detector sensitivity, to estimate and subtract background light components from the measurement light
Data Source
Figure 1A~1B
Figure 1C~2B
Figure 3
AI summary
The present invention is a spectral measurement device (100) configured to detect measurement light (110) including light emitted from a measurement object and to measure spectral characteristic of the light emitted from the measurement object, the spectral measurement device comprising: a spectral optical system configured to disperse the measurement light (110); a detection unit (40) configured to detect intensity of light dispersed by the spectral optical system; a spectral characteristic acquisition unit (504) configured to acquire a measurement light spectral characteristic indicating a relationship between a light intensity and a wavelength of the measurement light on a basis of a detection result of the detection unit; a storage unit (503) configured to store spectral characteristic information on possible background light, the information indicating a spectral characteristic of the possible background light, which involves a spectral sensitivity characteristic of the detection unit (40); and a processing unit (504) configured to obtain a spectral characteristic of background light which is light emitted from the ambience of the measurement object, from the measurement light spectral characteristic and the spectral characteristic information on the possible background light.