JPS57133503A - Optical and magnetic recorder and reproducer - Google Patents

Optical and magnetic recorder and reproducer

Info

Publication number
JPS57133503A
JPS57133503A JP1858281A JP1858281A JPS57133503A JP S57133503 A JPS57133503 A JP S57133503A JP 1858281 A JP1858281 A JP 1858281A JP 1858281 A JP1858281 A JP 1858281A JP S57133503 A JPS57133503 A JP S57133503A
Authority
JP
Japan
Prior art keywords
lens
driving circuit
recording
laser
medium
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.)
Granted
Application number
JP1858281A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0158561B2 (enrdf_load_stackoverflow
Inventor
Akira Takahashi
Kenji Oota
Toshihisa 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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP1858281A priority Critical patent/JPS57133503A/ja
Publication of JPS57133503A publication Critical patent/JPS57133503A/ja
Publication of JPH0158561B2 publication Critical patent/JPH0158561B2/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
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/10506—Recording by modulating only the light beam of the transducer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10595—Control of operating function

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
JP1858281A 1981-02-10 1981-02-10 Optical and magnetic recorder and reproducer Granted JPS57133503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1858281A JPS57133503A (en) 1981-02-10 1981-02-10 Optical and magnetic recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1858281A JPS57133503A (en) 1981-02-10 1981-02-10 Optical and magnetic recorder and reproducer

Publications (2)

Publication Number Publication Date
JPS57133503A true JPS57133503A (en) 1982-08-18
JPH0158561B2 JPH0158561B2 (enrdf_load_stackoverflow) 1989-12-12

Family

ID=11975616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1858281A Granted JPS57133503A (en) 1981-02-10 1981-02-10 Optical and magnetic recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS57133503A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176505A (en) * 1981-04-23 1982-10-29 Olympus Optical Co Ltd Bias magnetic field applying system
JPS59125728U (ja) * 1983-02-07 1984-08-24 パイオニア株式会社 光磁気記録装置
JPS60630A (ja) * 1983-06-16 1985-01-05 Matsushita Electric Ind Co Ltd 光学式記録再生装置
JPS60209944A (ja) * 1984-04-02 1985-10-22 Nec Corp 光磁気記録再生消去装置
US4630249A (en) * 1983-09-26 1986-12-16 U.S. Philips Corporation Method of recording information in a magneto-optical record carrier, apparatus for carrying out the method, and magneto-optical record carrier for use in an apparatus for carrying out the method
JPS63100642A (ja) * 1986-10-17 1988-05-02 Hitachi Ltd 光磁気記録再生装置
JPS63144445A (ja) * 1986-12-05 1988-06-16 Fujitsu Ltd 光磁気デイスク装置のフオ−カス制御方式
JPS6455762A (en) * 1987-08-26 1989-03-02 Yokogawa Electric Corp Magneto-optical disk inspection device
FR2632438A1 (fr) * 1988-06-07 1989-12-08 Philips Nv Enregistreur magneto-optique a champ magnetique module
US4998231A (en) * 1988-12-29 1991-03-05 Sony Corporation Magneto-optical disk recording apparatus
US5077713A (en) * 1989-12-13 1991-12-31 Matsushita Electric Industrial Co., Ltd. Magneto-optical disk writing/reading apparatus including a floating magnetic head
US5111440A (en) * 1988-04-29 1992-05-05 North American Philips Corporation An apparatus for controlling the rotation and stabilizing the position of a magnet device
US5168483A (en) * 1989-08-22 1992-12-01 Sony Corporation Magnetic head position control apparatus including drive means responsive to a summed signal from a capacitance detection electrode and a disk size detector means
JPH0590620U (ja) * 1991-10-24 1993-12-10 日本電気ホームエレクトロニクス株式会社 光磁気記録装置

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176505A (en) * 1981-04-23 1982-10-29 Olympus Optical Co Ltd Bias magnetic field applying system
JPS59125728U (ja) * 1983-02-07 1984-08-24 パイオニア株式会社 光磁気記録装置
JPS60630A (ja) * 1983-06-16 1985-01-05 Matsushita Electric Ind Co Ltd 光学式記録再生装置
US4630249A (en) * 1983-09-26 1986-12-16 U.S. Philips Corporation Method of recording information in a magneto-optical record carrier, apparatus for carrying out the method, and magneto-optical record carrier for use in an apparatus for carrying out the method
JPS60209944A (ja) * 1984-04-02 1985-10-22 Nec Corp 光磁気記録再生消去装置
JPS63100642A (ja) * 1986-10-17 1988-05-02 Hitachi Ltd 光磁気記録再生装置
JPS63144445A (ja) * 1986-12-05 1988-06-16 Fujitsu Ltd 光磁気デイスク装置のフオ−カス制御方式
JPS6455762A (en) * 1987-08-26 1989-03-02 Yokogawa Electric Corp Magneto-optical disk inspection device
US5111440A (en) * 1988-04-29 1992-05-05 North American Philips Corporation An apparatus for controlling the rotation and stabilizing the position of a magnet device
FR2632438A1 (fr) * 1988-06-07 1989-12-08 Philips Nv Enregistreur magneto-optique a champ magnetique module
US5163032A (en) * 1988-06-07 1992-11-10 U.S. Philips Corp. Magneto-optical recorder with servo control system for a magnetic-field modulation system
US4998231A (en) * 1988-12-29 1991-03-05 Sony Corporation Magneto-optical disk recording apparatus
US5168483A (en) * 1989-08-22 1992-12-01 Sony Corporation Magnetic head position control apparatus including drive means responsive to a summed signal from a capacitance detection electrode and a disk size detector means
US5077713A (en) * 1989-12-13 1991-12-31 Matsushita Electric Industrial Co., Ltd. Magneto-optical disk writing/reading apparatus including a floating magnetic head
JPH0590620U (ja) * 1991-10-24 1993-12-10 日本電気ホームエレクトロニクス株式会社 光磁気記録装置

Also Published As

Publication number Publication date
JPH0158561B2 (enrdf_load_stackoverflow) 1989-12-12

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