Method for reading and writing magneto-optical media
US6256267A · kind A · utility
7Cited by
4References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Aug 24, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of using laser light to access a magneto-optical disc utilizes first and second objective lenses, the second objective lens being mounted in a light channel of a slider having a primary planar surface that flies over the surface of the magneto-optical disc. The laser light is directed through the first and second objective lenses that focus the laser light onto the surface of the magneto-optical disc. Focus of the laser light is maintained solely by moving the first objective lens in an axial direction with respect to the magneto-optical disc, the first objective lens being mounted to an actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.