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
  • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
  • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
  • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
  • G11B7/0906—Differential phase difference systems
• • 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
  • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
  • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
  • G11B7/094—Methods and circuits for servo offset compensation
• • 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
  • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
  • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
  • G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs

Landscapes

• Physics & Mathematics (AREA)
• Mathematical Physics (AREA)
• Optical Recording Or Reproduction (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49116381

Family Applications (1)

Country Status (8)

Families Citing this family (2)

Family Cites Families (8)

• 2012
  • 2012-12-28 TW TW101150784A patent/TW201337916A/en unknown
• 2013
  • 2013-01-17 US US14/381,243 patent/US9087524B2/en active Active
  • 2013-01-17 WO PCT/JP2013/050804 patent/WO2013132894A1/en active Application Filing
  • 2013-01-17 KR KR20147020909A patent/KR20140138607A/en not_active Application Discontinuation
  • 2013-01-17 JP JP2014503513A patent/JP5871052B2/en active Active
  • 2013-01-17 EP EP13757997.5A patent/EP2824664A1/en not_active Withdrawn
  • 2013-01-17 CN CN201380011843.5A patent/CN104145307A/en active Pending
• 2014
  • 2014-08-29 IN IN7288DEN2014 patent/IN2014DN07288A/en unknown

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