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Optical strain sensor for the measurement of microdeformations of surfaces
Optical strain sensor for the measurement of microdeformations of surfaces
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机译:光学应变传感器,用于测量表面的微变形
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摘要
An optical strain sensor for measuring microdeformations of a surface with a resolution of at least 0.2 microns. The sensor comprises at least one camera for taking photographs of areas of the surface, the photographs being separated by a known fixed distance from one another before deformation has occurred. Templates are selected on the photographs taken before deformation, relocalized on photographs taken after deformation of the surface, and the deformation is derived from the computation of the difference in distances between the templates before and after deformation has occurred.
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