JPH0411926B2 - - Google Patents

Info

Publication number
JPH0411926B2
JPH0411926B2 JP57123812A JP12381282A JPH0411926B2 JP H0411926 B2 JPH0411926 B2 JP H0411926B2 JP 57123812 A JP57123812 A JP 57123812A JP 12381282 A JP12381282 A JP 12381282A JP H0411926 B2 JPH0411926 B2 JP H0411926B2
Authority
JP
Japan
Prior art keywords
recording
record carrier
output
circuit
light source
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 - Lifetime
Application number
JP57123812A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5914137A (ja
Inventor
Masahiro Deguchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP12381282A priority Critical patent/JPS5914137A/ja
Publication of JPS5914137A publication Critical patent/JPS5914137A/ja
Publication of JPH0411926B2 publication Critical patent/JPH0411926B2/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
    • G11B7/0945—Methods for initialising servos, start-up sequences

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP12381282A 1982-07-15 1982-07-15 光学式記録再生装置 Granted JPS5914137A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12381282A JPS5914137A (ja) 1982-07-15 1982-07-15 光学式記録再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12381282A JPS5914137A (ja) 1982-07-15 1982-07-15 光学式記録再生装置

Publications (2)

Publication Number Publication Date
JPS5914137A JPS5914137A (ja) 1984-01-25
JPH0411926B2 true JPH0411926B2 (da) 1992-03-03

Family

ID=14869943

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12381282A Granted JPS5914137A (ja) 1982-07-15 1982-07-15 光学式記録再生装置

Country Status (1)

Country Link
JP (1) JPS5914137A (da)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54102109A (en) * 1978-01-27 1979-08-11 Matsushita Electric Ind Co Ltd Focusing method of optical recorder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54102109A (en) * 1978-01-27 1979-08-11 Matsushita Electric Ind Co Ltd Focusing method of optical recorder

Also Published As

Publication number Publication date
JPS5914137A (ja) 1984-01-25

Similar Documents

Publication Publication Date Title
US4426693A (en) Light source intensity control in an optical recording and reproducing apparatus
JPS626580Y2 (da)
KR880002326B1 (ko) 디스크 재생장치
JPH06243496A (ja) ディスク再生装置及びそのフォーカスバランス自動調整方法及び信号処理装置
JPH0551973B2 (da)
JPS63187439A (ja) 光磁気記録方式
JPH0411926B2 (da)
JPH0668498A (ja) 情報記録媒体処理装置
JP2607070B2 (ja) 情報記録再生装置
JPH06139583A (ja) 光ディスク装置
JP2553656B2 (ja) 焦点制御装置
JPS61156540A (ja) 光情報記録再生装置
JPH0676312A (ja) トラッキングサーボ回路
JP2585265B2 (ja) 情報記録再生装置
JP2606545B2 (ja) 情報記憶装置
JP3607670B2 (ja) 光ディスク装置及びディスクチルト検出方法
JPS6217287B2 (da)
JP2626644B2 (ja) トラッキング方法及び光ディスク装置
JPH0246532A (ja) 焦点制御装置
JPS61233430A (ja) トラツククロスパルス発生器
JPH0194539A (ja) 光デイスク装置
JPS63282930A (ja) 情報処理装置
JPS63249943A (ja) 光デイスク装置の自動焦点制御装置
JPS61156541A (ja) 光情報記録再生装置
JPH0438624A (ja) 光ディスク装置