Optical recording medium having large guide groove track pitch/meander amplitude ratio
US5463614A · kind A · utility
53Cited by
10References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1993 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Sep 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/261
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A writable optical disk with meandering guide grooves is so arranged that a ratio of "track pitch/meander amplitude" is not less than a certain value, for example 57, at least in an out-of-phase portion in which meander of the meandering guide grooves is out of phase on mutually adjacent tracks. Also, the track pitch in the out-of-phase portion is larger than that in an in-phase portion in which meander of the guide grooves is in phase on mutually adjacent tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.