Combined optical light pipe and protective enclosure
US6752526B2 · kind B2 · utility
0Cited by
11References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2001 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Nov 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light pipe, including a transparent housing member characterized by a first refractive index, a light source positioned to shine a light beam through the transparent housing member, and at least one enclosed pocket positioned within the transparent member. The enclosed pocket is characterized by a second refractive index, wherein the first refractive index is substantially greater than the second refractive index. Light shining through the transparent member is totally internally reflected by the enclosed pocket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.