JPH0370292B2 - - Google Patents

Info

Publication number
JPH0370292B2
JPH0370292B2 JP57097164A JP9716482A JPH0370292B2 JP H0370292 B2 JPH0370292 B2 JP H0370292B2 JP 57097164 A JP57097164 A JP 57097164A JP 9716482 A JP9716482 A JP 9716482A JP H0370292 B2 JPH0370292 B2 JP H0370292B2
Authority
JP
Japan
Prior art keywords
signal
output
differential amplifier
supplied
light
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
JP57097164A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58215736A (ja
Inventor
Masayuki Yoshida
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP57097164A priority Critical patent/JPS58215736A/ja
Priority to US06/501,101 priority patent/US4603410A/en
Publication of JPS58215736A publication Critical patent/JPS58215736A/ja
Publication of JPH0370292B2 publication Critical patent/JPH0370292B2/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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Control Of Position Or Direction (AREA)
JP57097164A 1982-06-07 1982-06-07 光学式記録情報読取装置におけるサ−ボ装置 Granted JPS58215736A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP57097164A JPS58215736A (ja) 1982-06-07 1982-06-07 光学式記録情報読取装置におけるサ−ボ装置
US06/501,101 US4603410A (en) 1982-06-07 1983-06-06 Error signal generating device for use in an apparatus for optically reading information with a resistance network connected to photo detector elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57097164A JPS58215736A (ja) 1982-06-07 1982-06-07 光学式記録情報読取装置におけるサ−ボ装置

Publications (2)

Publication Number Publication Date
JPS58215736A JPS58215736A (ja) 1983-12-15
JPH0370292B2 true JPH0370292B2 (enExample) 1991-11-07

Family

ID=14184928

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57097164A Granted JPS58215736A (ja) 1982-06-07 1982-06-07 光学式記録情報読取装置におけるサ−ボ装置

Country Status (2)

Country Link
US (1) US4603410A (enExample)
JP (1) JPS58215736A (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62180568A (ja) * 1986-02-04 1987-08-07 Sony Corp デイスク状記録媒体の欠陥検出装置
JPS62293522A (ja) * 1986-06-13 1987-12-21 Pioneer Electronic Corp 記録デイスク再生装置
JPS6446237A (en) * 1987-08-12 1989-02-20 Canon Kk Optical information recording and reproducing device
JP2508761B2 (ja) * 1987-10-20 1996-06-19 日本電気株式会社 光記憶再生装置
DE3824039A1 (de) * 1988-07-15 1990-01-18 Thomson Brandt Gmbh Verfahren und schaltungsanordnung zur kompensation von offset-spannungen in einem fokus- und/oder spurregelkreis
DE4017487A1 (de) * 1990-05-31 1991-12-05 Thomson Brandt Gmbh Servoregelkreis
JP2705326B2 (ja) * 1991-02-19 1998-01-28 日本電気株式会社 光磁気ヘッド装置
EP0599387B1 (en) * 1992-11-20 1998-05-13 Koninklijke Philips Electronics N.V. Magneto-optical read/write device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198949A (en) * 1960-11-21 1965-08-03 F L Moseley Co Line following apparatus for a graphical recorder including symmetrical photocell arrangements
JPS5774837A (en) * 1980-10-25 1982-05-11 Olympus Optical Co Ltd Signal detection system of optical information reproducing device

Also Published As

Publication number Publication date
JPS58215736A (ja) 1983-12-15
US4603410A (en) 1986-07-29

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