System for measuring electromagnetic radiation originating from the hemisphere
AssigneeDeutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.
InventorDieter Lorenz
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Abstract
A system for measuring electromagnetic radiation originating from the hemhere corresponding to a solid angle of 2.pi. is provided wherein a highly sensitive low-inertia detector is disposed below a transmissive dome and wherein the chopped light detection method is utilized. There are provided above the transmissive dome two similarly or differently designed modulators which are in the shape of dome segments and which are fitted into each other. At least one of the modulators rotates about their common vertical axis or the modulators may both rotate about the common vertical axis, either at the same or a different speed in the same direction or in opposite directions.
Claims14
A system for measuring electromagnetic radiation originating from the hemisphere corresponding to a solid angle of 2.pi., comprising at least one low-inertia detector disposed below of a transmissive dome and two modulators in the shape of dome segments having a common vertical axis which are fitted to each other and means for rotating both of said modulators about the common vertical axis at different relative speed to each other so that the low-inertia detector is exposed to the average electromagnetic radiation from the entire hemisphere which is measured over time.
Dependencies are inferred from the claim text.