The state of art of holographic non destructive testing in work of art diagnostics

The application of holography to works of art for the diagnosis of their state of conservation or for studying the behaviour under mechanical or thermal stresses has been successfully demonstrated and described; its uses in revealing damaged areas or structural alterations in embryo of both statues and panel paintings has already been proved while other possibilities are regularly coming to attention. In this paper these various applications are summarized. Some experimental results obtained in works of art diagnostics with double exposure holograms, sandwich holograms are reported Cette recherche presente l'application de l'holographie aux œuvres d'art: diagnostic de l'etat de conservation ou etude des procedes de fabrications sous contraintes mecaniques ou thermiques. On a ainsi prouve son interet dans la mise en evidence de surfaces endommagees ou deteriorees ainsi que dans la detection des alterations structurales embryonnaires de statues et de peintures de chevalet. D'autres applications interessantes apparaissent regulierement. Cet article resume les differentes applications et principalement l'etude des deformations dynamiques du support en bois d'une œuvre d'art liees aux variations thermiques du milieu. Il mentionne egalement les resultats experimentaux obtenus par holographie avec double exposition ainsi que par holographie sandwich