Absorber, device for manufacturing an absorber and method for manufacturing an absorber

The invention relates to an absorber, comprising a carrier element (1) provided with an optically selective coating (2), wherein the coating (2) having a specific layer thickness (d) comprises a metallic portion and a portion of at least one low molecular weight element or one low molecular weight element Compound, wherein the concentration ratio of the two components to each other for adjusting the optical refractive index n in the course of the layer thickness (d) varies. The invention further relates to apparatus and a method for producing said absorber. According to the invention, it is provided with respect to the absorber that the coating (2), facing away from the carrier element, is provided with an additional surface layer (3) having a refractive index 1 <n <1.6.