Eyepiece having total internal reflection based light folding
US8873148B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2011 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Dec 3, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0152
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An eyepiece for a head mounted display includes a light relay body, a total internal reflection (“TIR”) interface, and a focusing lens. The light relay body has a first end coupled to receive CGI light from an image source and a second end including a viewing region from which the CGI light is emitted. The TIR interface is disposed in the viewing region at an oblique angle relative to an eye-ward side of the light relay body through which the CGI light is emitted from the eyepiece. The TIR interface is oriented to redirect the light towards the eye-ward side of the light relay body. The focusing lens is disposed along the eye-ward side of the light relay body in alignment with the TIR interface to bring the CGI light into focus for a near-to-eye arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.