Prismatic ocular device and personal video display device incorporating same
US7901072B1 · kind B1 · utility
6Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2009 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Nov 13, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An ocular device includes a housing, a rotatable ring, a first prism fixed in the rotatable ring, an indexable ring and a second prism fixed in the indexable ring. The housing has a stepped inner profile defining first and second circular tracks in the housing, the tracks being concentric about a rotational axis. The rotatable ring is disposed in the first circular track and is freely rotatable about the rotational axis with respect to the housing. The indexable ring is disposed in the second circular track and is indexable about the rotational axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.