Eyepiece for near-to-eye display with multi-reflectors
US8471967B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2011 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jan 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An eyepiece for a head mounted display includes an illumination module, an end reflector, a viewing region, and a polarization rotator. The illumination module includes an image source for launching computer generated image (“CGI”) light along a forward propagating path. The end reflector is disposed at an opposite end of the eyepiece from the illumination module to reflect the CGI back along a reverse propagation path. The viewing region is disposed between the illumination module and the end reflector. The viewing region includes a polarizing beam splitter (“PBS) and non-polarizing beam splitter (“non-PBS”) disposed between the PBS and the end reflector. The viewing region redirects the CGI light from the reverse propagation path out of an eye-ward side of the eyepiece. The polarization rotator is disposed in the forward and reverse propagation paths of the CGI light between the viewing region and the end reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.