Head tracking system
US6061916A · kind A · utility
6Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | May 15, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0198
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A head tracking system 10 comprises a radiation emitter 18 and a radiation sensor 16 connected to a tracking processor 12. The emitter 18 has an output 46 producing radiation with spectral peak in the range 1000 nm to 1100 nm from a conventional LED 40 with a spectral peak in the range 500 nm to 900 nm in combination with a photoluminescent material 42.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.