TW200739566A - A method and apparatus for controlling lasers power for a plurality of laser beams - Google Patents
A method and apparatus for controlling lasers power for a plurality of laser beamsInfo
- Publication number
- TW200739566A TW200739566A TW095113185A TW95113185A TW200739566A TW 200739566 A TW200739566 A TW 200739566A TW 095113185 A TW095113185 A TW 095113185A TW 95113185 A TW95113185 A TW 95113185A TW 200739566 A TW200739566 A TW 200739566A
- Authority
- TW
- Taiwan
- Prior art keywords
- laser beam
- writing
- laser beams
- laser
- power
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
- G11B7/1263—Power control during transducing, e.g. by monitoring
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
- G11B7/1267—Power calibration
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Laser Beam Processing (AREA)
Abstract
A method of controlling laser power for a plurality of laser beams, the method comprising the steps of: - successively switching on (710) the writing of each laser beam at different starts of segment for writing data, - successively switching off (720) the writing of each laser beam that arrives at the start of a segment previously written by another laser beam, - detecting (730) only one laser beam that has kept on writing, - calibrating (732) laser power of the only one laser beam, - switching off (750) the writing of said only one laser beam, and - shifting (760) all laser beams.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200610071858 | 2006-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200739566A true TW200739566A (en) | 2007-10-16 |
Family
ID=38441952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW095113185A TW200739566A (en) | 2006-03-30 | 2006-04-13 | A method and apparatus for controlling lasers power for a plurality of laser beams |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2005428A2 (en) |
JP (1) | JP2009531800A (en) |
KR (1) | KR20090005086A (en) |
RU (1) | RU2008142953A (en) |
TW (1) | TW200739566A (en) |
WO (1) | WO2007113715A2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3476879B2 (en) * | 1992-12-09 | 2003-12-10 | パイオニア株式会社 | Optical disc information recording apparatus and reproducing apparatus having a plurality of reading or recording beams |
JPH08147745A (en) * | 1994-11-17 | 1996-06-07 | Matsushita Electric Ind Co Ltd | Control method of multibeam laser power and optical multibeam recording and reproducing device |
-
2006
- 2006-04-13 TW TW095113185A patent/TW200739566A/en unknown
-
2007
- 2007-03-21 JP JP2009502282A patent/JP2009531800A/en not_active Withdrawn
- 2007-03-21 EP EP07735201A patent/EP2005428A2/en not_active Withdrawn
- 2007-03-21 RU RU2008142953/28A patent/RU2008142953A/en unknown
- 2007-03-21 WO PCT/IB2007/050981 patent/WO2007113715A2/en active Application Filing
- 2007-03-21 KR KR1020087026320A patent/KR20090005086A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
KR20090005086A (en) | 2009-01-12 |
WO2007113715A3 (en) | 2007-12-06 |
JP2009531800A (en) | 2009-09-03 |
WO2007113715A2 (en) | 2007-10-11 |
EP2005428A2 (en) | 2008-12-24 |
RU2008142953A (en) | 2010-05-10 |
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