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SUNLIGHT COLLECTION SYSTEM WITH LIGHTGUIDE HAVING SOLID AND FLUID COMPONENTS

United States Patent Application

20170115473
A1
View the Complete Application at the US Patent & Trademark Office
The system captures and concentrates sunlight for transmission to interior spaces or to a PV system. A solar collector uses arrayed refractive lenses and opposing concave focusing mirrors and a movable coupling sheet forming part of a lightguide. The transparent sheet contains small angled mirrors, where each angled mirror corresponds to a particular set of the lenses/focusing mirrors and is in the focal plane. The lightguide also includes a fluid surrounding the transparent sheet, and lower index cladding layers sandwich the fluid. The sheet is translated within the fluid by an actuator to position the angled mirrors at the focal points of the sunlight for maximum deflection of the sunlight to an edge of the lightguide for extraction to a light transmission system or to a PV system. A position sensor on the sheet provides feedback regarding the position of the angled mirrors relative to the focal points.
Kozodoy, Peter (Palo Alto, CA), Gladden, Christopher (San Mateo, CA), Pavilonis, Michael (San Francisco, CA), Rhodes, Christopher (Oakland, CA)
15/ 333,970
October 25, 2016
GOVERNMENT LICENSE RIGHTS [0002] This invention was made with Government support under contract DE-AR0000332 awarded by the Advanced Research Projects Agency-Energy (ARPA-E), a division of the Department of Energy. The Government has certain rights in the invention.