Magnetic optical disk player having improved servoresponse sensitivity
US5333124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1990 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | May 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic optical disk player comprises a turn table for turning a magnetic optical disk, a recording head and an erasing head movable along two different radial directions of the turn table respectively, and bias magnets for generating bias magnetic fields distributed along moving areas of the recording and erasing heads and having the directions opposite to each other, wherein the recording head and the erasing head each includes an objective, movable coils coupled with the objective, and drive magnet for generating a drive magnetic field interlinking the movable coils in the same direction as that of the bias magnetic fields. The directions of the bias magnetic fields for erasing and recording heads are opposite to each other. The magnetic fields for generating electromagnetic forces to drive the objective in the erasing head and the recording head are also opposite to each other. The bias magnetic field and the magnetic field for generating the electromagnetic force are additively coupled with each other in each head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.