Linear fresnel optic for reducing angular spread of light from LED array
US9109777B2 · kind B2 · utility
5Cited by
2References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2013 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Oct 12, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light source may comprise a cylindrical lens, for example a cylindrical Fresnel lens, a linear array of light-emitting elements, the linear array aligned with and emitting light through the cylindrical Fresnel lens, wherein the cylindrical Fresnel lens reduces the angular spread of light in a widthwise axis of the linear array, the linear array spanning a lens length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.