Abstract: To crystallize a material, a thin layer of amorphous or polycrystalline material is deposited on at least one area of the surface of a top part of a substrate. A metal layer is then deposited on at least one area of the thin layer. Thermal treatment is then performed to enable crystalline growth of the material of the thin layer, resulting in: a rapid temperature increase of the top part of the substrate until liquid or overmelted liquid state is achieved, and heat transfer from the interface between the top part of the substrate and the thin layer to the interface between the thin layer and the metal layer.

Abstract: To crystallize a material, a thin layer of amorphous or polycrystalline material is deposited on at least one area of the surface of a top part of a substrate. A metal layer is then deposited on at least one area of the thin layer. Thermal treatment is then performed to enable crystalline growth of the material of the thin layer, resulting in: a rapid temperature increase of the top part of the substrate until liquid or overmelted liquid state is achieved, and heat transfer from the interface between the top part of the substrate and the thin layer to the interface between the thin layer and the metal layer.

Abstract: A device for preventive treatment of an optical surface designed to be exposed to a laser flow including a thermal excitation source for providing a localized thermal annealing of a site of the optical surface) by means of a beam applied to the site. The device further includes a measuring member for measuring, in real time said during said localized thermal annealing, a quantity representing the temperature of the site of the optical surface) and at least one control member for increasing the linear power density of the beam applied to the site by the excitation source and, when the quantity reaches a predetermined set point, for gradually decreasing the linear power density.

Abstract: The invention concerns a method for detecting zones damageable by laser flow including a step of measuring thermoluminescence of the surface to be treated to locate said zones at risk, followed by a step of thermal conditioning of zones thus located.