Asymmetric area lighting lens
US9689554B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2015 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Aug 4, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens for distributing light from a light emitter in a desired asymmetric illumination profile includes a lens body having an input side and an output side. The input side receives light from an emitter, and the output side includes primary refractive surface, total internal reflection surfaces, and a secondary refractive surface associated with the total internal refection surfaces. A primary emission axis associated with the emitter is defined through the lens body, and a transverse reference plane is positioned parallel to the primary emission axis. A desired illumination region is located on a first side of the reference plane, and a desired dark region is located on a second side of the reference plane. The primary refractive surface, the total internal reflection surfaces and the secondary refractive surface direct a substantial portion of the light from the emitter to the desired illumination region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.