Optical data storage technology
US6215755A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1998 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Oct 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/13727
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A read/write arm for use in an optical memory system. The read/write arm of the present invention has reflective surfaces for directing an optical beam from the arm rotation axis on to an optical disk. The arm features a lightweight lens mounted at one end of the arm for focusing a light beam onto an optical disk. The focal distance of the light beam may be adjusted using piezoelectric actuators mounted on the read/write arm for precisely deflecting the arm. The light beam may be further adjusted through use of a relay lens interposed between a collimating lens and the object lens. This arrangement is advantageously optimized through the use of feedback loops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.