Efficient collimation of light with optical wedge
US8351744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2012 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Apr 23, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Embodiments of optical collimators are disclosed. For example, one disclosed embodiment comprises an optical waveguide having a first end, a second end opposing the first end, a viewing surface extending at least partially between the first end and the second end, and a back surface opposing the viewing surface. The viewing surface comprises a first critical angle of internal reflection, and the back surface is configured to be reflective at the first critical angle of internal reflection. Further, a collimating end reflector comprising a faceted lens structure having a plurality of facets is disposed at the second end of the optical waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.