Advanced retroreflecting aerial displays
US10151931B2 · kind B2 · utility
1Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2018 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Jan 5, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B35/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A persistent image retroreflecting display that enables the formation of a real image in free space includes a first light source that generates a polarized light output; a retroreflector module adjacent a first side of the first light source; a quarter waveplate coupled to the retroreflector module and adjacent the first light source; and a reflective polarizer positioned between the first light source and a viewer of the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.