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
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
  • G11B20/1816—Testing
  • G11B20/182—Testing using test patterns
• • 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
  • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
  • G11B7/0045—Recording
  • G11B7/00454—Recording involving phase-change effects

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• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Optical Recording Or Reproduction (AREA)
• Optical Head (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=8224647

Family Applications (1)

Country Status (9)

Families Citing this family (4)

Family Cites Families (2)

• 1997
  • 1997-02-24 TW TW086102195A patent/TW358935B/en not_active IP Right Cessation
  • 1997-12-01 JP JP52540498A patent/JP3956153B2/en not_active Expired - Lifetime
  • 1997-12-01 EP EP97912403A patent/EP0880778A1/en not_active Withdrawn
  • 1997-12-01 IL IL12563597A patent/IL125635A/en not_active IP Right Cessation
  • 1997-12-01 CN CNB971934614A patent/CN1138264C/en not_active Expired - Lifetime
  • 1997-12-01 KR KR10-1998-0706046A patent/KR100516813B1/en active IP Right Grant
  • 1997-12-01 ID IDW980059D patent/ID23689A/en unknown
  • 1997-12-04 MY MYPI97005831A patent/MY125549A/en unknown
  • 1997-12-04 ZA ZA9710932A patent/ZA9710932B/en unknown

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