Measurement of very small changes of object position using speckle correlation method

Abstract

The paper deals with measurement of very small changes of the object position using speckle correlation method. An object translation is very often measured by deformation tensor components. Often used measuring method is based on direct contact with the object, which can be destructive. Presented contactless method uses statistical approach which means computation of the cross-correlation function of two speckle patterns recorded before and after object translation.