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US 2014/0153256 A1Published application
Light duct tee extractor
Assignee3M Innovation Properties Company
InventorsDavid G. Freier, Thomas R.J. Corrigan
Life of this patent
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Abstract
The disclosure generally relates to highly efficient light duct light extractors that are capable of extracting a portion of the light propagating within a light duct with nearly 100 percent efficiency. In particular, the described light extractors are configured in a “Tee” shape with a reflective diverter element.
Claims19
A light duct extractor, comprising:
- a first light conduit defining a light transport cavity capable of transporting light along a first propagation direction;
- a second light conduit defining a light diversion cavity, the second light conduit intersecting the first light conduit such that the light transport cavity and the light diversion cavity are contiguous;
- and
- a light diverter extending between the light transport cavity and the light diversion cavity, the light diverter comprising a reflective surface disposed at a diverter angle to the first propagation direction,
- wherein a first light ray propagating within a collimation angle θ of the first propagation direction intercepting the reflective surface, enters the second light conduit and is diverted to a second light ray propagating within the collimation angle θ of a second propagation direction in the second light conduit.
2 more elements
Dependencies are inferred from the claim text.