Optical storage method and apparatus having enhanced resolution
US6700840B2 · kind B2 · utility
7Cited by
2References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 30, 2001 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Oct 10, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0937
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical storage method and apparatus having enhanced resolution uses a Fabry-Perot cavity to narrow a beam used for reading data stored on media. The method and apparatus achieve an enhanced resolution due to the reduction of beam size and the increased slope of the beam profile in a beam used to illuminate physical changes in the media corresponding to data encoded in the media. The Fabry-Perot cavity may be included in a media for use with standard optical storage devices or may be external to the media, as part of an optical storage head for use with standard media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.