Patent ID: 6627307
Filing Date: 2003-09-30
Classification: G02B,Y10S,Y10T

Abstract:
A composite material, in particular for reflectors, comprising:a flexible metallic support having a roughness, configured to be capable of being formed into a coil; an intermediate layer disposed on the metallic support, being planar and having a thickness of about 2 to 20 &mgr;m being adapted to the roughness of the support made of a coating material selected from the group consisting of a polycondensate, a polyadduct, a polymer produced by free-radical polymerization, whereby the material of said intermediate layer, its application process and curing parameters are selected in such a way that said intermediate layer has an arithmetic average value of roughness in the range from about 1 nm to 5 &mgr;m corresponding to a predetermined diffuse optical reflectivity in the range of not greater that 4% to about 95%; a multilayer optical system disposed on the intermediate layer; a non-metallic protective layer disposed on the optical multilayer system, which has a thickness from 5-20 nm, whereby the transmission, absorption and refractive indices, thickness and roughness, of the individual layers of said multilayer optical system, said non-metallic protective layer and said intermediate layer are configured in such a way that the composite material has a.total optical reflectivity of at least 95%, a mechanical load bearing capacity of greater than H 50-1 and wherein said composite is configured to withstand stresses imposed during illumination engineering shaping processes, such that no cracks form during processing.