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

Landscapes

• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Optical Recording Or Reproduction (AREA)
• Optical Head (AREA)
• Optical Record Carriers And Manufacture Thereof (AREA)
• Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=19812612

Family Applications (2)

Family Applications Before (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 BR BR1206/72*[A patent/BR7201206D0/pt unknown
  • 1972-03-01 AT AT166672A patent/AT342122B/de not_active IP Right Cessation
  • 1972-03-01 CH CH298372A patent/CH553522A/xx not_active IP Right Cessation
  • 1972-03-01 IT IT67654/72A patent/IT952884B/it active
  • 1972-03-01 GB GB948772A patent/GB1391541A/en not_active Expired
  • 1972-03-01 CH CH509273A patent/CH552920A/xx not_active IP Right Cessation
  • 1972-03-01 NO NO646/72A patent/NO139905C/no unknown
  • 1972-03-01 JP JP2068372A patent/JPS544603B1/ja active Pending
  • 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
  • 1972-03-02 ES ES400336A patent/ES400336A1/es not_active Expired
  • 1972-03-03 AR AR240808A patent/AR195275A1/es active
  • 1972-03-03 FR FR7207419A patent/FR2128576B1/fr not_active Expired
• 1973
  • 1973-03-28 AR AR247284A patent/AR203718A1/es active
• 1978
  • 1978-08-11 JP JP9746078A patent/JPS5452504A/ja active Granted

Also Published As

Similar Documents