Projection lens for light source arrangement
US7104672B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2004 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | Mar 9, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/856
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light source arrangement for substantially enhaning the lighting intensity of the light beams emitted from the light source therefore includes a lens body and an illumination unit. The lens body has an illumination portion defining a light projecting surface and at least a diffraction portion defining a light diffraction surface inclinedly extended at a diffraction angle, wherein a diffraction density of the illumination portion is different from that of the diffraction portion. The illumination unit is covered by the lens body for radially generating light towards the illumination portion. When the light reaches the light diffraction surface of a diffraction portion at an angle larger than the diffraction angle, the light is substantially reflected at the light diffraction surface back towards the light projecting surface, such that the light from the illumination unit is converged to project at the light projecting surface of the lens body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.