Patent ID: 6335142
Filing Date: 2002-01-01
Classification: G02B,G02F,G11B,H01J

Abstract:
Coating absorbing light within a spectral range within the visible-near infrared range, said coating being formed on a substrate (2, 12, 14) and characterized in that it comprises:at least one layer of thin metal (8, 9, 20) which is absorbent in said spectral range, and at least one dielectric layer (7, 10, 22) which is transparent in said spectral range, said dielectric layer being formed on said thin metal layer, and in that said thin metal layer is optically discontinuous, its refraction index being greater than the refraction index of the metal in the bulk state, and its extinguishing coefficient being less than the extinguishing coefficient of the metal in the bulk state, within said spectral range, said coating also comprising a thick, optically continuous metal layer (4) between the substrate (2) and the thin metal layer (8) closest to this substrate.