Holography is a technique that allows the light scattered from an object to be recorded and later reconstructed so that when an imaging system (a camera or an eye) is placed in the reconstructed beam, an image of the object will be seen even when the object is no longer present (cf Wikipedia). As a non destructive testing method, holography consists in visualising the interference image between the image of a still object (with no constraint) and the image of the same object supporting a mechanical constraint, which can be induced by a mechanical force, a heat source, or a pressure modification. This method permits to detect delaminations, unbondings...
holografie (Ned., Deut.); holographie (Fr., Deut.); olografia (It.); holografia (Esp.); holografi (Sven.)