Lens, light-emitting device having the lens, and visual notification appliance
US9858772B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2016 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Sep 29, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lens, a light-emitting device having a lens, and a visual notification appliance are disclosed. The lens may be substantially in the shape of a cap, and may include a substantially flat bottom surface, and a substantially cross-shaped recess sunken into the bottom surface, the recess providing orthogonal cross-arms, the optical source being adapted to be disposed in a cavity formed by the recess and capable of aligning with a crossing center of the cross-arms, and the recess being arranged so that more light incident upon an internal surface of the recess is refracted to the directions of the cross-arms than to the directions between the cross-arms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.