Lightpipe providing wide angle output
US5425124A · kind A · utility
6Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Mar 23, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lightpipe which outputs light in a wide angle output pattern. An embodiment of the inventive lightpipe has a longitudinal cross section which has at least one section with a varying width. In addition, a preferred embodiment of the inventive lightpipe has a section with increasing width of the cross section near an input end of the lightpipe and a section with decreasing width of the cross section near an output end of the lightpipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.