Schwarzer Strahler

摘要

A heatable body 11 is heated by means of a heating foil in the form of a metallic electrically conducting heating coil 14 embedded in a plastic sheet, adhered in a thermally conductive manner to a rear surface 13 of the heatable body of the black body radiator. At a slight distance from and slightly inclined to the heating foil surface an infrared-radiation-reflecting mirror 15 is arranged, the intermediate space between the heatable body and the mirror being evacuated. The mirror reflects the radiation coming from the heating coil and incident thereon into the intermediate spaces of the heating coil so that the radiation passes through the heating foil and is absorbed by the rear side of the black radiator. Furthermore, the rear side of the mirror and a holder are provided with a thermal insulation, for example in the form of ceramic paper 19. <IMAGE>