JPS6233652B2 - - Google Patents

Info

Publication number
JPS6233652B2
JPS6233652B2 JP56179973A JP17997381A JPS6233652B2 JP S6233652 B2 JPS6233652 B2 JP S6233652B2 JP 56179973 A JP56179973 A JP 56179973A JP 17997381 A JP17997381 A JP 17997381A JP S6233652 B2 JPS6233652 B2 JP S6233652B2
Authority
JP
Japan
Prior art keywords
focus
recording
adjustment signal
optimal
light beam
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
JP56179973A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5883339A (ja
Inventor
Akinori Motai
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.)
Teac Corp
Original Assignee
Teac Corp
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 Teac Corp filed Critical Teac Corp
Priority to JP56179973A priority Critical patent/JPS5883339A/ja
Priority to JP56179971A priority patent/JPS5883338A/ja
Publication of JPS5883339A publication Critical patent/JPS5883339A/ja
Publication of JPS6233652B2 publication Critical patent/JPS6233652B2/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
    • G11B7/0908—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 focusing only

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP56179973A 1981-11-10 1981-11-10 光学的情報記録再生装置において最適フォ−カス状態を得る方法 Granted JPS5883339A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56179973A JPS5883339A (ja) 1981-11-10 1981-11-10 光学的情報記録再生装置において最適フォ−カス状態を得る方法
JP56179971A JPS5883338A (ja) 1981-11-10 1981-11-10 光学的情報記録装置における記録用光ビームの最適フオーカス状態を得るための方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP56179973A JPS5883339A (ja) 1981-11-10 1981-11-10 光学的情報記録再生装置において最適フォ−カス状態を得る方法
JP56179971A JPS5883338A (ja) 1981-11-10 1981-11-10 光学的情報記録装置における記録用光ビームの最適フオーカス状態を得るための方法

Publications (2)

Publication Number Publication Date
JPS5883339A JPS5883339A (ja) 1983-05-19
JPS6233652B2 true JPS6233652B2 (US06650917-20031118-M00005.png) 1987-07-22

Family

ID=26499655

Family Applications (2)

Application Number Title Priority Date Filing Date
JP56179971A Granted JPS5883338A (ja) 1981-11-10 1981-11-10 光学的情報記録装置における記録用光ビームの最適フオーカス状態を得るための方法
JP56179973A Granted JPS5883339A (ja) 1981-11-10 1981-11-10 光学的情報記録再生装置において最適フォ−カス状態を得る方法

Family Applications Before (1)

Application Number Title Priority Date Filing Date
JP56179971A Granted JPS5883338A (ja) 1981-11-10 1981-11-10 光学的情報記録装置における記録用光ビームの最適フオーカス状態を得るための方法

Country Status (1)

Country Link
JP (2) JPS5883338A (US06650917-20031118-M00005.png)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60143439A (ja) * 1983-12-30 1985-07-29 Sony Corp 光学式デイスク・プレ−ヤのフオ−カス制御回路
JPS61177646A (ja) * 1985-02-04 1986-08-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション 光学デイスク装置
JPS62128027A (ja) * 1985-11-28 1987-06-10 Fujitsu Ltd 光デイスクのフオ−カスサ−ボ方式
EP0354754B1 (en) * 1988-08-09 1994-03-09 Matsushita Electric Industrial Co., Ltd. Method and apparatus for adjusting target position for focusing of light beam
JPH0288143U (US06650917-20031118-M00005.png) * 1988-12-26 1990-07-12
JPH03235603A (ja) * 1990-02-09 1991-10-21 Sekisui Chem Co Ltd 主装置付き分電盤

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265404A (en) * 1975-11-26 1977-05-30 Matsushita Electric Ind Co Ltd Information recording original disk being furnished with pattern for d etecting focus position
JPS5271208A (en) * 1975-12-10 1977-06-14 Mansei Kogyo Kk Device for driving automatically focusing device of optical information reader
JPS54104803A (en) * 1978-02-03 1979-08-17 Matsushita Electric Ind Co Ltd Focus detector in optical recorder-reproducer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265404A (en) * 1975-11-26 1977-05-30 Matsushita Electric Ind Co Ltd Information recording original disk being furnished with pattern for d etecting focus position
JPS5271208A (en) * 1975-12-10 1977-06-14 Mansei Kogyo Kk Device for driving automatically focusing device of optical information reader
JPS54104803A (en) * 1978-02-03 1979-08-17 Matsushita Electric Ind Co Ltd Focus detector in optical recorder-reproducer

Also Published As

Publication number Publication date
JPS6334529B2 (US06650917-20031118-M00005.png) 1988-07-11
JPS5883339A (ja) 1983-05-19
JPS5883338A (ja) 1983-05-19

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