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
  • 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

Applications Claiming Priority (2)

Publications (3)

Family

ID=6390658

Family Applications (1)

Country Status (15)

Families Citing this family (5)

Family Cites Families (1)

• 1989
  • 1989-09-30 DE DE3932831A patent/DE3932831A1/de not_active Withdrawn
• 1990
  • 1990-09-20 JP JP2513261A patent/JP2854131B2/ja not_active Expired - Lifetime
  • 1990-09-20 HU HU9200995A patent/HUT61118A/hu unknown
  • 1990-09-20 DE DE59008679T patent/DE59008679D1/de not_active Expired - Lifetime
  • 1990-09-20 AT AT90914170T patent/ATE119706T1/de not_active IP Right Cessation
  • 1990-09-20 EP EP90914170A patent/EP0494892B1/de not_active Expired - Lifetime
  • 1990-09-20 WO PCT/EP1990/001595 patent/WO1991005340A1/de active IP Right Grant
  • 1990-09-20 FI FI921365A patent/FI921365A0/fi not_active Application Discontinuation
  • 1990-09-20 ES ES90914170T patent/ES2071829T3/es not_active Expired - Lifetime
  • 1990-09-20 AU AU64186/90A patent/AU6418690A/en not_active Abandoned
  • 1990-09-20 KR KR1019920700709A patent/KR100227668B1/ko not_active Expired - Lifetime
  • 1990-09-28 DD DD90344296A patent/DD298325A5/de not_active IP Right Cessation
  • 1990-09-28 CN CN90108036A patent/CN1020009C/zh not_active Expired - Lifetime
  • 1990-09-28 MY MYPI90001677A patent/MY107309A/en unknown
  • 1990-10-08 TR TR90/0923A patent/TR24612A/xx unknown
• 1996
  • 1996-05-09 HK HK81796A patent/HK81796A/xx not_active IP Right Cessation

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