Light filtering directional control element and light fixture incorporating the same
US8177408B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2009 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Aug 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/113
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In one embodiment of this invention, a light filtering directional control element provides increased spatial color or luminance uniformity and desired angular color uniformity and customizable light re-direction properties. In one embodiment of this invention, a light filtering directional control element directs light off-axis and focuses light in the far field. In a further embodiment of this invention a light fixture comprising the light filtering collimation element has a spatial luminance uniformity greater than 80%, a color uniformity Δu′v′ of less than 0.04 and a short mixing distance. In a further embodiment, the light fixture incorporating the element has electronically or manually configurable light output profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.