Optical guide and optical system
US11156840B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 16, 2020 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Jun 16, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0152
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical guide for a near-eye display device includes a first guide element having a light input zone and a second guide element having an output zone. The first guide element is superimposed on the second guide element. The optical guide also includes an optical coupling system between the first guide element and the second guide element, and the first and second guide elements have, on the first part of their length, a mutual spacing so as to delimit a thin layer of air between said guide elements extending between a first longitudinal end of the guide elements and the optical coupling system. The optical coupling system, located at a second longitudinal end of the first and second guide elements, includes a single-piece portion of the guide elements, associated with an optical reflection member to propagate the beams of light from the input zone toward the output zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.