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US 8,743,462 B2Granted
Concentrating daylight collector
Assignee3M Innovative Properties Company
InventorsDavid G. Freier, Thomas R. Corrigan
Life of this patent
Estimating the term…
Abstract
The disclosure generally relates to concentrating daylight collectors, and in particular to concentrating daylight collectors useful for interior lighting of a building. The concentrating daylight collectors generally include a plurality of moveable reflective vanes and a Cassegrain-type concentrator section.
Claims20
A concentrating daylight collector, comprising:
- a collection section having a first opening for receiving sunlight and an opposing second opening for transmission of sunlight;
- a plurality of moveable reflective vanes disposed adjacent the first opening for directing received sunlight to the opposing second opening;
- a parabolic reflector disposed to reflect a major portion of the sunlight passing though the opposing second opening to a hyperbolic reflector disposed adjacent a focal point of the parabolic reflector;
- and
- an output aperture disposed to accept sunlight reflected from the hyperbolic reflector.
2 more elements
A concentrating daylight collector, comprising:
- a sunlight collection section configured to receive a first sunlight beam through an input region and direct a reflected second sunlight beam toward a first output region, the reflected second sunlight beam substantially parallel to a central axis of the sunlight collection section;
- and
- a sunlight concentration section disposed adjacent the first output region and configured to receive the reflected second sunlight beam, reflect from a first concentrator surface, and reflect from a second concentrator surface, thereby forming a concentrated sunlight beam directed to an output aperture that is smaller than the first output region,
- wherein the input region comprises a first plurality of moveable reflective vanes.
1 more element
Dependencies are inferred from the claim text.