Apparatus for reproducing information data from magneto-optical recording medium using linear polarized beam
US7251200B2 · kind B2 · utility
2Cited by
15References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2003 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Feb 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1245
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus is provided for reproducing optical disks. An optical head irradiates linearly polarized light onto an optical disk. A change of a polarization orientation of light that is transmitted or reflected from the optical disk is detected in accordance with a recording signal on the optical disk. The apparatus moves the optical head into a pre-determined portion of the optical disk where write-once information is stored, and reproduces the write-once information after detecting a change of a polarization orientation of light that is transmitted or reflected from the pre-determined portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.