Method and apparatus of multibeam optical disc readout
US6385143B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Apr 12, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pickup applies five different light beams at the same time to every second five tracks on a signal plane of a CD-ROM. A record data read system reads record data independently for each light beam system in accordance with outputs of respective light beams reflected from the signal plane, and stores the read record data in the record order. Under the control of a system controller, the optical pickup and record data read system read the record data of the CD-ROM by alternately performing an operation of continuously reading the record data with the five light beam systems during approximately two rotations of the CD-ROM and a track jump operation by seven tracks in a forward direction after the continuous reading operation with a combination of the five light beam systems shows no omission of the record data of the CD-ROM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.