Device for initializing an optical disc
US5852595A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1997 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Apr 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device capable of initializing an optical disc in high-speed and accurate manner includes a moving table (106) movable in the radius direction of a optical disc (101) to which first and second photo head moving sections (107) and (108) are fixed. A laser beam (131) emitted from a fixed section (105) is branched into two erasing beams through a beam splitter (136) and a reflection mirror (138), and the erasing beams are irradiated on the optical disc (101) from respective objective lenses (142) and (152). The erasing beam are of sizes that can erase a plurality of tracks simultaneously. The moving table (106) advances by a plurality of tracks to thereby initialize the plurality of tracks at once.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.