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
  • G11B7/0948—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 specially adapted for detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B21/00—Head arrangements not specific to the method of recording or reproducing
  • G11B21/02—Driving or moving of heads
  • G11B21/08—Track changing or selecting during transducing operation
  • G11B21/081—Access to indexed tracks or parts of continuous track
  • G11B21/083—Access to indexed tracks or parts of continuous track on discs
  • G11B21/085—Access to indexed tracks or parts of continuous track on discs with track following of accessed part
• • 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
  • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
  • G11B7/0857—Arrangements for mechanically moving the whole head
  • G11B7/08582—Sled-type positioners
• • 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
  • G11B7/0946—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 specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration

Applications Claiming Priority (1)

Publications (1)

Family

ID=19831414

Family Applications (1)

Country Status (18)

Families Citing this family (48)

Family Cites Families (4)

• 1978
  • 1978-08-22 NL NL7808638A patent/NL7808638A/nl not_active Application Discontinuation
  • 1978-12-26 US US05/973,273 patent/US4239942A/en not_active Expired - Lifetime
• 1979
  • 1979-07-19 AR AR277378A patent/AR216608A1/es active
  • 1979-08-16 CA CA000333921A patent/CA1145039A/en not_active Expired
  • 1979-08-16 DE DE19792933138 patent/DE2933138A1/de active Granted
  • 1979-08-17 AT AT0559179A patent/AT371269B/de not_active IP Right Cessation
  • 1979-08-17 IT IT25156/79A patent/IT1122792B/it active
  • 1979-08-17 GB GB7928728A patent/GB2029051B/en not_active Expired
  • 1979-08-17 DK DK345679A patent/DK345679A/da not_active Application Discontinuation
  • 1979-08-20 NZ NZ191353A patent/NZ191353A/xx unknown
  • 1979-08-20 AU AU50105/79A patent/AU526416B2/en not_active Ceased
  • 1979-08-20 ES ES483498A patent/ES483498A1/es not_active Expired
  • 1979-08-20 FR FR7920978A patent/FR2434457B1/fr not_active Expired
  • 1979-08-20 BE BE0/196801A patent/BE878327A/fr not_active IP Right Cessation
  • 1979-08-20 SE SE7906915A patent/SE7906915L/ not_active Application Discontinuation
  • 1979-08-20 BR BR7905360A patent/BR7905360A/pt unknown
  • 1979-08-20 CH CH759279A patent/CH638918A5/de not_active IP Right Cessation
  • 1979-08-22 JP JP10614179A patent/JPS5528600A/ja active Granted

Also Published As

Similar Documents