Abstract
The displacement, the shape of an object, or the refractive index distribution change in the case of transparent objects can successfully be measured by either holographic or speckle techniques. However, the demand for comparative measurements of two objects, e.g. master and test by interferometry has both conceptual and practical importance. One way of doing that is using holographic illumination for the test object. Applying holographic technique in recording test interferograms provides high resolution of records. On the other hand, the holographically illuminated test object may also be inspected by electronic speckle pattern interferometry more easily but with different quality. The paper presents results of applications of hologram interferometric and electronic speckle correlation techniques in recording process of the difference patterns showing that both techniques can be effective in comparative measurements of displacements.
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