Information recording system and reproducing for recording and reproducing information on a magneto-optical disk
US4841502A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1986 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jun 6, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10595
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording and reproducing system for a magneto-optical disk having first and second optical systems each including at least first and second optical heads arranged in the positions displaced for example, by 1/4 sectors with each other. A single sector address control unit connected to the first and second optical heads for detecting each sector address on a disk and for controlling each access of the first and second optical means to each of desired sectors on the disk, through a magneto-optical disk control unit. The first and second optical heads are positioned at a first position, e.g., sector head position, of one sector, the second optical head is positioned at a second position, e.g., data position of the other sector, such that when either one of the first or second optical head is detecting one sector address, the other has finished in the address detection for the other sector address. In addition, the optical heads carry out an erasing operation prior to the information recording on the disk. Fast and safe recording of information becomes possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.