LED-based light source with sharply defined field angle
US8485692B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2012 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Aug 31, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A luminaire with an LED based illumination device having at least one LED includes a transmissive lens element that in combination with reflector is able to generate an output beam with a sharply defined large angle intensity profile. The reflector element is mounted to the LED based illumination device. The transmissive lens element includes first and second interior surfaces and third and fourth exterior surfaces. A portion of light emitted from the LED passes through the first interior surface and the third exterior surface and refracts towards an optical axis of the LED based illumination device, and the reflector element without interacting with the reflector element. Another portion of light emitted from the LED passes through the second interior surface and fourth exterior surface and refracts away from the optical axis to be reflected by the reflector element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.