Light tunnel
US11360319B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2020 |
| Grant date | Jun 14, 2022 |
| Priority date | — |
| Expiry date | Oct 18, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0977
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Described examples include a light tunnel of a material, the light tunnel including: a first section having a first surface and an opposing second surface, a second section having a third surface and an opposing fourth surface, a third section having a fifth surface and an opposing sixth surface, and a fourth section having a seventh surface and an opposing eighth surface; a first crease between the first section and the second section, a second crease between the second section and the third section, a third crease between the third section and the fourth section, and an intersection between an end of the first section and the fourth section; and a reflective coating forming a reflective surface on the first, third, fifth and seventh surfaces, the reflective surface being continuous across at least one of the creases, and the reflective coating being discontinuous at the intersection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.