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
  • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
  • G11B7/005—Reproducing
• • 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
  • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
  • G11B7/013—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track for discrete information, i.e. where each information unit is stored in a distinct discrete location, e.g. digital information formats within a data block or sector
• • 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
• • 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
  • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

Priority Applications (1)

Applications Claiming Priority (1)

Publications (2)

Family

ID=19812612

Family Applications (1)

Country Status (15)

Families Citing this family (5)

• 1971
  • 1971-03-04 NL NL7102863A patent/NL7102863A/xx not_active Application Discontinuation
• 1972
  • 1972-02-21 ZA ZA721137A patent/ZA721137B/xx unknown
  • 1972-02-29 AU AU39454/72A patent/AU470672B2/en not_active Expired
  • 1972-03-01 GB GB948772A patent/GB1391541A/en not_active Expired
  • 1972-03-01 IT IT67654/72A patent/IT952884B/it active
  • 1972-03-01 CH CH298372A patent/CH553522A/xx not_active IP Right Cessation
  • 1972-03-01 BR BR1206/72*[A patent/BR7201206D0/pt unknown
  • 1972-03-01 AT AT166672A patent/AT342122B/de not_active IP Right Cessation
  • 1972-03-01 NO NO646/72A patent/NO139905C/no unknown
  • 1972-03-01 CH CH509273A patent/CH552920A/xx not_active IP Right Cessation
  • 1972-03-01 JP JP2068372A patent/JPS544603B1/ja active Pending
  • 1972-03-02 ES ES400336A patent/ES400336A1/es not_active Expired
  • 1972-03-02 BE BE780146A patent/BE780146A/xx not_active IP Right Cessation
  • 1972-03-02 CA CA136,033A patent/CA1023855A/en not_active Expired
  • 1972-03-03 FR FR7207419A patent/FR2128576B1/fr not_active Expired
  • 1972-03-03 AR AR240808A patent/AR195275A1/es active
• 1973
  • 1973-03-28 AR AR247284A patent/AR203718A1/es active
• 1978
  • 1978-08-11 JP JP9746078A patent/JPS5452504A/ja active Granted

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