Electric resistance heating devices – Heating devices – Radiant heater
Patent
1995-02-28
1997-01-14
Jeffery, John A.
Electric resistance heating devices
Heating devices
Radiant heater
392422, 250504R, G01J 552
Patent
active
055948324
ABSTRACT:
A black body radiator for calibrating infrared measuring devices in the form of a heatable body is heated by means of a heating foil in the form of a metallic electrically excellently conducting heating coil embedded in a plastic sheet. The heating foil is adhered in excellently thermally conductive manner to a rear surface 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 is arranged. 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. The intermediate space between the heatable body and the mirror is evacuated. Furthermore, the rear side of the mirror and a holder are provided with a thermal insulation, for example in the form of ceramic paper.
REFERENCES:
patent: 1196073 (1916-08-01), Berry et al.
patent: 3069525 (1962-12-01), Waters
patent: 3126468 (1964-03-01), Aitken et al.
patent: 4184066 (1980-01-01), Svoboda
patent: 4346651 (1982-08-01), Schickedanz
patent: 4387301 (1983-06-01), Wirick et al.
patent: 4724356 (1988-02-01), Daehler
Abstract of Japanese Patent No. 63-138220. Patent Abstracts of Japan. vol. 12, No. 396. Oct. 21, 1988.
Deutsche Forschungsanstalt fur Luft - und Raumfahrt e.V.
Jeffery John A.
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