Rigid-body-motion-assisted holographic interferometry

In interferometry, spatial heterodyning is performed by multiplying the opt ical phase to be determined by a reference phase. Thus the spatial frequenc y spectrum corresponding to the signal investigated is better identified an d manipulated. We propose a holographic interferometry method that is spati ally heterodyned by deliberate rigid-body movement of the object investigat ed. The object deformation is calculated from the fringe pattern correspond ing to two different positions of the object. This work is aimed at a quant itative deformation analysis of highly dynamic objects through pulsed holog raphic interferometry.