Lighting device with optical reflector, luminaire having such lighting device and method of manufacturing a compact optical reflector
US9989213B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2013 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Jan 14, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a lighting device comprising: an optical reflector (200, 500) which has an interior surface (201); and a light source (205, 505); wherein the interior surface has a plurality of facets (203) that form a Fresnel structure-like reflecting surface (202), and the interior surface may further have a cone (504) so as to avoid light from the light source being reflected back to the light source; wherein at least part of the light from the light resource is reflected by the optical reflector into an output direction. The invention also relates to a luminaire which comprises the lighting device according to the invention. The invention further relates to a method of manufacturing an optical reflector for a spot lighting lamp. The method comprises forming (S01) a bowl-like structure that has an opening for emitting light and that has a Fresnel structure on the interior surface of the bowl-like structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.