Shape Measuring Device Dual-Light Segmentation
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Solution Overview
Problem
Existing shape measuring devices using triangular distance measuring methods struggle to accurately observe the surface state of measuring objects, especially those without patterns or textures, while maintaining high accuracy in shape measurement.
Innovation Solution
A shape measuring device that employs a dual-light system, where one light is used for stereoscopic shape measurement and another for surface state imaging, with adjustable focus and light conditions to synthesize both shape and surface state data, allowing for clear observation of the surface state alongside accurate shape measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If triangular distance measuring method is used for shape measurement, then shape measurement accuracy is improved, but surface state observation capability deteriorates
Solution Approach 1:
The patent divides the measurement function into two separate light projecting units: one dedicated to shape measurement (first light projecting unit) and another to surface state imaging (second light projecting unit). This segmentation allows each unit to be optimized for its specific function, resolving the contradiction between shape measurement accuracy and surface state observation capability
Solution Approach 2:
The light receiving unit serves dual purposes: it receives both the first light for shape measurement and the second light for surface state imaging. By making the light receiving unit multi-functional, the system captures both shape and surface state information without requiring separate receiving systems, thus preventing information loss while maintaining measurement precision
2Device complexity
If single light is used for measurement, then device complexity is reduced, but measurement comprehensiveness deteriorates
Solution Approach 1:
The measurement system is segmented into two distinct light projecting units with different functions: one for shape measurement and another for surface state imaging. This segmentation enhances measurement comprehensiveness by capturing multiple aspects of the measuring object, while the modular design keeps device complexity manageable
Solution Approach 2:
The patent merges the reception function for both shape measurement light and surface state imaging light into a single light receiving unit. This combination allows the system to achieve comprehensive measurement capabilities without proportionally increasing device complexity, as the receiving system is shared rather than duplicated
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 clear observation of the surface state and high-accuracy shape measurement by generating synthesized data that combines stereoscopic shape and surface state information, effectively addressing the limitations of previous methods.
Implementation Method 1
a light receiving unit arranged above the stage and configured to receive the first light and the second light reflected by the measuring object mounted on the stage and output a light receiving signal indicating a light receiving amount
Implementation Method 2
a relative distance changing unit for changing a focus position of the light receiving unit by changing a relative distance between the light receiving unit and the stage in an optical axis direction of the light receiving unit
Data Source
AI summary
The invention provide a shape measuring device, a shape measuring method, and a shape measuring program capable of clearly observing a surface state of a measuring object while measuring a shape of the measuring object at high accuracy. Light irradiated by a light projecting unit is reflected by a measuring object and received by a light receiving unit. Stereoscopic shape data of the measuring object is generated by a triangular distance measuring method. The light irradiated by the light projecting unit is reflected by the measuring object and received by the light receiving unit. All-focus texture image data of the measuring object is generated by synthesizing texture image data of a plurality of portions of the measuring object while changing a focus position of the light receiving unit. The stereoscopic shape data and the all-focus texture image data are synthesized to generate synthesized data.