Shape Measuring Device Luminance Height Region Specification
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Solution Overview
Problem
Existing shape measuring devices face challenges in quickly and accurately acquiring measurement values, especially when the measuring object lacks characteristic height or luminance distributions, making it difficult to specify the measurement target region effectively.
Innovation Solution
A shape measuring device that employs a light projecting section with multiple peak wavelengths, a movable optical system, and a two-dimensionally arrayed light receiving section to generate interference patterns, allowing for the calculation of height information and luminance images. This device includes a position detecting section to determine relative positions and a calculating section to specify the measurement target region based on positional and luminance relations, enabling rapid and accurate measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional shape measuring device is used, then the measurement process is simple, but it cannot quickly and accurately acquire measurement values when the measuring object lacks characteristic height or luminance distributions
Solution Approach 1:
The patent introduces luminance image data as an additional dimension beyond traditional height image data. By utilizing the luminance dimension, the system can specify measurement target regions even when height characteristics are absent, thereby maintaining measurement accuracy while enabling faster acquisition through targeted region selection.
Solution Approach 2:
The patent changes the parameter basis for region specification from relying solely on height distribution characteristics to utilizing luminance distribution characteristics. This parameter change allows the system to adapt to objects without characteristic height distributions, improving both accuracy and speed by identifying target regions through luminance variations.
2Adaptability or versatility
If the measuring object lacks characteristic height or luminance distributions, then the measurement can be performed on uniform surfaces, but it becomes difficult to specify the measurement target region effectively
Solution Approach 1:
By introducing luminance image data as an additional dimension, the system gains another basis for region specification. Even when height distribution provides no characteristics, luminance distribution may reveal target regions, thus maintaining adaptability to uniform surfaces while reducing specification difficulty.
Solution Approach 2:
The system performs preliminary generation of both height image data and luminance image data before region specification. This preliminary action ensures that when the measuring object lacks height characteristics, the luminance data is already available to facilitate target region specification, thereby improving both adaptability and reducing detection difficulty.
3Productivity
If two-dimensional height image data and luminance image data are generated simultaneously, then measurement speed increases, but device complexity increases
Solution Approach 1:
The patent merges the functions of height measurement and luminance detection into a single integrated system. By combining these functions, the system generates both types of data simultaneously through one coordinated process rather than requiring separate measurement systems, thus increasing measurement speed while controlling device complexity through functional integration.
Solution Approach 2:
The system is designed with multi-functionality to perform both height measurement and luminance detection using the same optical path and detector. This universal design allows simultaneous data generation without proportionally increasing device complexity, as the same components serve multiple measurement functions.
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 quick and accurate acquisition of measurement values by simultaneously generating two-dimensional height image data and luminance image data, even in the absence of characteristic height or luminance distributions, facilitating efficient use in production line inspections.
Implementation Method 1
generate interference light of the measurement light reflected by the measuring object and the reference light reflected by the reference body
Data Source
AI summary
To provide a shape measuring device capable of quickly and accurately acquiring a measurement value of a desired part of a measuring object. A specifying section 32 sets, on the basis of a relative positional relation between the first region in the measurement luminance image and a second region in the reference luminance image, a measurement target region corresponding to the reference target region in the measurement height image. A calculating section 33 calculates, on the basis of measurement height image data, a measurement value concerning height of the measuring object in the measurement target region.