Laser lighting device and application thereof
US9660410B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2014 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Aug 31, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0071
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser lighting device provides a broad range illumination for an area, such as a smoke filled space, a hallway or an underwater environment with certain turbidity. This lighting device contains a laser diode as a light source and a diffraction grating that is able to diffract an input laser light beam generated from the laser diode into a plurality of output laser light beams with the cross section of the plurality of output laser light beams forming a pattern comprising a plurality of light spots. In addition, this pattern may be in a donut shape. That is to say, the power of a light spot formed by a zero order light beam is lower than other light spots' power. Further, this laser lighting device is used to provide lighting with depth perception and forward visibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.