High density optical disc player
US6009072A · kind A · utility
3Cited by
9References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1999 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Jan 25, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0037
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc player for reproducing an optical disc having a pit width of 0.2-0.35 .mu.m, a pit depth of 100-120 nm, and a track pitch of 0.7-0.85 .mu.m. The optical disc player includes a semiconductor laser having a wavelength of 590-670 .mu.m and a laser beam projector which projects the laser beam from the laser onto the optical disc with a spot of a predetermined diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.