JPH0221054B2 - - Google Patents

Info

Publication number
JPH0221054B2
JPH0221054B2 JP2704984A JP2704984A JPH0221054B2 JP H0221054 B2 JPH0221054 B2 JP H0221054B2 JP 2704984 A JP2704984 A JP 2704984A JP 2704984 A JP2704984 A JP 2704984A JP H0221054 B2 JPH0221054 B2 JP H0221054B2
Authority
JP
Japan
Prior art keywords
signal
track
light
tracking
light spot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP2704984A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59171036A (ja
Inventor
Moriji Izumida
Takeshi Maeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2704984A priority Critical patent/JPS59171036A/ja
Publication of JPS59171036A publication Critical patent/JPS59171036A/ja
Publication of JPH0221054B2 publication Critical patent/JPH0221054B2/ja
Granted legal-status Critical Current

Links

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
    • G11B7/095—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

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP2704984A 1984-02-17 1984-02-17 光スポツトのトラツク横断検出方法 Granted JPS59171036A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2704984A JPS59171036A (ja) 1984-02-17 1984-02-17 光スポツトのトラツク横断検出方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2704984A JPS59171036A (ja) 1984-02-17 1984-02-17 光スポツトのトラツク横断検出方法

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP50041334A Division JPS5925287B2 (ja) 1975-04-07 1975-04-07 情報再生装置

Publications (2)

Publication Number Publication Date
JPS59171036A JPS59171036A (ja) 1984-09-27
JPH0221054B2 true JPH0221054B2 (enrdf_load_stackoverflow) 1990-05-11

Family

ID=12210213

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2704984A Granted JPS59171036A (ja) 1984-02-17 1984-02-17 光スポツトのトラツク横断検出方法

Country Status (1)

Country Link
JP (1) JPS59171036A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS59171036A (ja) 1984-09-27

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