In all quantitative analyses of holographic interferograms used for displacement or strain measurements it is the sensitivity vector that defines the geometry of the optical setup used for recording. Although the determination of this sensitivity vector is no easy task, one must know its variation in order to take into account changes in the conditions of illumination or observation along the different perspectives under which the object is seen. We describe here a gauging technique for making perspective corrections directly from the holographic image. The use of this technique has the advantage of freeing the object from the optical environment necessary to perform the recording.
© 1982 Optical Society of AmericaPDF Article