Optical disk apparatus for accessing optical disks with different substrate thicknesses
US6147947A · kind A · utility
2Cited by
5References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 1998 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | May 7, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk apparatus is described which can read information from and write information to optical disk of different thicknesses. The optical disk apparatus includes coupling lenses which alter the focusing capabilities of an objective lens which controls reading and writing to the optical disk. Thus, the present invention allows both "standard density" and "high density" optical disks to be accessed by the same optical disk apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.