Polyhedral Calibration Module for BRDF Measurement Accuracy
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Solution Overview
Problem
Standard plates used for calibration in detecting optical characteristics of objects result in low detection accuracy due to their inability to effectively characterize the optical characteristics of the target surface.
Innovation Solution
A scaling module with multiple intersecting observation planes, each with a calibrated bidirectional reflectance distribution function (BRDF) value, forming a three-dimensional structure that determines the attitude and incident angle of the light source, allowing for precise matching of the object's surface with corresponding observation regions to obtain accurate BRDF characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standard plate is used for calibration, then the calibration process is simple, but the detection accuracy of optical characteristics is low
Solution Approach 1:
The calibration module is divided into multiple observation planes (first, second, third observation planes) with different orientations. Each plane contains observation regions with known BRDF characteristics, allowing segmented calibration of different spatial directions and improving overall measurement accuracy
Solution Approach 2:
The invention transitions from a two-dimensional standard plate to a three-dimensional calibration module with multiple observation planes arranged in different spatial orientations. This dimensional expansion enables calibration from multiple angles simultaneously, significantly improving the accuracy of optical characteristic detection
2Device complexity
If a standard plate is used for calibration, then the device structure is simple, but the ability to characterize optical characteristics of the target surface is insufficient
Solution Approach 1:
The calibration module serves multiple functions: it provides calibration references for different observation angles, enables determination of light source incident angles, and allows calculation of attitude parameters. The multi-planar structure makes the calibration system universally applicable to various optical detection scenarios
Solution Approach 2:
By adding the third dimension through multiple observation planes arranged in different orientations, the calibration module gains the ability to characterize optical characteristics from multiple directions, significantly enhancing its versatility in handling complex optical measurement tasks
3Measurement precision
If multiple observation planes are used in the calibration module, then the detection accuracy of BRDF characteristics is improved, but the device complexity increases
Solution Approach 1:
The calibration module is segmented into multiple observation planes, each with specific orientations and known BRDF characteristics. This segmentation allows the system to measure optical properties from different angles simultaneously, improving measurement precision while maintaining a modular and manageable structure
Solution Approach 2:
The observation regions on each observation plane are pre-calibrated with known BRDF characteristics before use. This preliminary calibration eliminates the need for complex real-time calculations and reduces operational complexity, allowing the system to achieve high measurement precision through straightforward comparison and calculation
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
Improves the accuracy and precision of measuring the attitude of the scaling module and incident angle of the light source, enhancing the detection of BRDF characteristics while avoiding blind spots in the visual field.
Implementation Method 1
each observation region has a corresponding calibrated bidirectional reflectance distribution function (BRDF) value
Data Source
AI summary
A calibration module and a use method therefor. The calibration module comprises: a plurality of observation planes, wherein among the plurality of observation planes, planes where at least two observation planes are located intersect, and there is a determined spatial position relationship between the plurality of observation planes. Each observation plane is provided with an observation area, and each observation area is provided with a corresponding calibrated BRDF value. By means of providing a polyhedral calibration module, the accuracy of measurement of the attitude of the calibration module and the incident angle of a light source is improved, such that the accuracy of testing of a BRDF characteristic of a surface of an object to be tested is improved.