Waveguides
US8654420B2 · kind B2 · utility
135Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 2009 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Dec 10, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A waveguide 112 includes a substrate of material 134 having optical layers 148, 152 applied to two external surfaces 146, 150. This reduces the critical angle c5 of the substrate of material 134 to provide greater interaction between image bearing light following a light path 140 and a grating element 142 and/or a greater total field of view 160, when compared to the total field of view 132 of a prior art waveguide 110, that is capable of being transmitted by the waveguide 112. Such a waveguide 112 can be used in a projection display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.