A dynamic in-plane deformation measurementusing virtual speckle patterns

摘要

The novel measurement method based on the virtual speckle patterns has been reported. The method can analyze thephase map in high resolution by using only information concerning the change of intensity of each speckle during adeformation process. In this paper, the possibility of the application for the analysis of dynamic in-plane deformationmeasurement by the method is investigated. The measuring optical system for dynamic events is discussed. In theexperimental results, the phenomenon of in-plane deformation by the collision of the metal sphere to a block of hardrubber is measured. The virtual speckle patterns are produced by only information during a deformation process in orderto analyze the deformation process. It is confirmed that the new method can analyze a large deformation which could notanalyze by the ordinary methods. Then, it is also confirmed that the high resolution measurement can be performed bythis method. The measuring optical system for dynamic events is discussed.