Classifications

• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
  • G05D3/00—Control of position or direction
  • G05D3/12—Control of position or direction using feedback
  • G05D3/14—Control of position or direction using feedback using an analogue comparing device
• • 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
• • 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
  • G11B7/095—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 discs, e.g. for compensation of eccentricity or wobble
  • G11B7/0953—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 discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Optical Recording Or Reproduction (AREA)
• Length Measuring Devices With Unspecified Measuring Means (AREA)
• Facsimile Scanning Arrangements (AREA)
• Inspection Of Paper Currency And Valuable Securities (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=19817347

Family Applications (1)

Country Status (17)

Families Citing this family (17)

Family Cites Families (2)

• 1972
  • 1972-11-11 NL NL7215307A patent/NL7215307A/xx not_active Application Discontinuation
• 1973
  • 1973-10-22 ZA ZA00738174A patent/ZA738174B/xx unknown
  • 1973-10-27 DE DE19732353901 patent/DE2353901A1/de active Granted
  • 1973-10-29 US US410774A patent/US3876827A/en not_active Expired - Lifetime
  • 1973-11-08 IT IT70275/73A patent/IT999743B/it active
  • 1973-11-08 GB GB5184973A patent/GB1452329A/en not_active Expired
  • 1973-11-08 CH CH1571373A patent/CH580843A5/xx not_active IP Right Cessation
  • 1973-11-08 CA CA185,305A patent/CA994909A/en not_active Expired
  • 1973-11-08 JP JP12502373A patent/JPS5420121B2/ja not_active Expired
  • 1973-11-08 NO NO4305/73A patent/NO141135C/no unknown
  • 1973-11-08 DK DK604873AA patent/DK137906B/da unknown
  • 1973-11-08 SE SE7315153A patent/SE395783B/xx unknown
  • 1973-11-08 BR BR8762/73A patent/BR7308762D0/pt unknown
  • 1973-11-08 AT AT939873A patent/AT330259B/de not_active IP Right Cessation
  • 1973-11-09 BE BE137615A patent/BE807160A/xx unknown
  • 1973-11-09 ES ES420410A patent/ES420410A1/es not_active Expired
  • 1973-11-09 FR FR7339855A patent/FR2206550B1/fr not_active Expired

Also Published As

Similar Documents