Why does STRIPER evaluate based on curvature?

Technical documentation on the "Surface Distortion Scanning Sensor" for measuring and evaluating the distortion of target object surfaces.

The "Surface Distortion Scanning Sensor STRIPER" from Hachiko Automation Co., Ltd. calculates curvature from the amount of change (displacement) in the stripe pattern and measures/evaluates the distortion of the object's surface. Why "curvature" instead of "displacement"? When trying to evaluate micro-distortion of a few micrometers as "displacement," it becomes buried within the displacement of the measurement surface, making it difficult to distinguish and extract the distorted areas. When evaluating micro-distortion as "curvature," the gentle changes and slopes of the measurement surface result in a large curvature radius, making the curvature almost "0," while the distorted areas have a small curvature radius, leading to significant changes in curvature that are easy to distinguish. [Contents] ■ What is curvature? ■ Advantages For more details, please refer to the catalog or feel free to contact us.

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