Acousto optic data storage system on a stationary and high density data storage media
US6307799A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Dec 3, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0901
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A miniaturized stationary optical storage system capable of reading and writing data on an optical storage media is disclosed. In the disclosed invention, the disk is held stationary and the beam is made to scan on both the axes by using an acousto optic technique. The preferred embodiment has a technique of obtaining parallel scanning beam, which is focused on to the optical storage media and the photo detector receives the reflected beam carrying the optical signal. The system has the capability of reading as well as writing on the optical storage media by using the same source or different source. The preferred embodiment also utilizes square as well as circular optical storage media of reduced size, which is achieved, by adopting smaller spot size and higher scanning resolution. The method of magnifying the scan angle of the scanning beam from the acousto optic deflector is also disclosed. The alternative embodiment utilizes phase shifting for reading the signal rather than the intensity of the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.