Devices for internal daylighting with IR rejection
AssigneeSerraLux Inc.
InventorMark E Gardiner
Life of this patent
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Abstract
A device for day lighting the interior of structure deploys reflective louvers that are spaced apart in stacks. The louvers include a coating or multilayer structure that is operative to reflect visible light but transmit IR light through the louver. The louvers also have a retro-reflective structure to return the IR light by reverse reflection in the opposite direction of the incident light, which is back toward the sun. The interior of the structure is more uniformly illuminated with visible light while the louvers and interior are not heated by IR light or radiation from the sun.
Claims20
An optical panel that comprises a plurality spaced apart elongated reflective elements arranged in a stack that spans a height of the optical panel and each elongated reflective element in said plurality has a reflective first surface and an opposing second surface, in which the second surface has a series of pairs of facets, each pair of most adjacent facets alternating between one of an obtuse and acute angle with respect to the reflective first surface in which the reflective first surface is operative to reflect visible light arriving in a first direction to a second direction that is opposite the first direction and is also operative to transmit infrared light through the elongated reflective element such that it is then reflected by the series of pairs of facets in the first direction.
Dependencies are inferred from the claim text.