Optical data storage tracking system
US5253245A · kind A · utility
34Cited by
14References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Jan 21, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0901
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data storage system comprises an optical data storage medium, a moveable optical head, and a fixed optical system. The fixed optical system comprises a focussing system and a fine tracking system. The fine tracking system achieves displacement of the beam spot on the optical medium without displacing the central axis of the beam from the aperture of the objective lens in the optical head. A low mass optical head is achieved without loss of light at the objective lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.