Optical disc
US5504734A · kind A · utility
10Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 1994 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | May 27, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24079
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc is formed with a land and a groove, and information is recorded on one of the land and the groove. Track pitch P and the width W of the other of the land and the groove satisfy the following conditions: EQU when P>1.2 .mu.m, W.ltoreq.0.217P; EQU when P.ltoreq.1.2 .mu.m, W.ltoreq.0.278P.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.