GB8311309D0 - Optical magnetic reproduction system - Google Patents

Optical magnetic reproduction system

Info

Publication number
GB8311309D0
GB8311309D0 GB838311309A GB8311309A GB8311309D0 GB 8311309 D0 GB8311309 D0 GB 8311309D0 GB 838311309 A GB838311309 A GB 838311309A GB 8311309 A GB8311309 A GB 8311309A GB 8311309 D0 GB8311309 D0 GB 8311309D0
Authority
GB
United Kingdom
Prior art keywords
reproduction system
optical magnetic
magnetic reproduction
optical
reproduction
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
GB838311309A
Other versions
GB2120001A (en
GB2120001B (en
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.)
TDK Corp
Original Assignee
TDK 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
Priority claimed from JP7221282A external-priority patent/JPS58188309A/en
Priority claimed from JP7220982A external-priority patent/JPS58188347A/en
Priority claimed from JP7221082A external-priority patent/JPS58188348A/en
Priority claimed from JP7221182A external-priority patent/JPS58188308A/en
Priority claimed from JP7221382A external-priority patent/JPS58188310A/en
Application filed by TDK Corp filed Critical TDK Corp
Publication of GB8311309D0 publication Critical patent/GB8311309D0/en
Publication of GB2120001A publication Critical patent/GB2120001A/en
Application granted granted Critical
Publication of GB2120001B publication Critical patent/GB2120001B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • 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
    • G11B11/10508—Recording by modulating only the magnetic field at 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
    • G11B11/10502—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
    • G11B11/10515—Reproducing
    • 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
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10547—Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
GB08311309A 1982-04-28 1983-04-26 An optical magnetic reproduction system Expired GB2120001B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP7221282A JPS58188309A (en) 1982-04-28 1982-04-28 Magnetic recording and writing method
JP7220982A JPS58188347A (en) 1982-04-28 1982-04-28 Apparatus and method of readout of magnetic record
JP7221082A JPS58188348A (en) 1982-04-28 1982-04-28 Record readout device
JP7221182A JPS58188308A (en) 1982-04-28 1982-04-28 Magnetic recording and writing method
JP7221382A JPS58188310A (en) 1982-04-28 1982-04-28 Magnetic recording medium and magnetic recording writing and reproducing method

Publications (3)

Publication Number Publication Date
GB8311309D0 true GB8311309D0 (en) 1983-06-02
GB2120001A GB2120001A (en) 1983-11-23
GB2120001B GB2120001B (en) 1985-10-30

Family

ID=27524373

Family Applications (2)

Application Number Title Priority Date Filing Date
GB08311308A Expired GB2120000B (en) 1982-04-28 1983-04-26 Magnetic recording and reproduction
GB08311309A Expired GB2120001B (en) 1982-04-28 1983-04-26 An optical magnetic reproduction system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB08311308A Expired GB2120000B (en) 1982-04-28 1983-04-26 Magnetic recording and reproduction

Country Status (1)

Country Link
GB (2) GB2120000B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569072B1 (en) * 1984-05-25 1988-09-16 Thomson Csf MAGNETO-OPTICAL READING SYSTEM
JPS61139959A (en) * 1984-12-12 1986-06-27 Canon Inc Reproducing method of magnetic recording
US4707755A (en) * 1985-03-20 1987-11-17 Hitachi, Ltd. Optical read-out magnetic head
FR2652670B1 (en) * 1989-10-03 1995-06-23 Thomson Csf HIGH RESOLUTION MAGNETOOPTIC READING HEAD.
FR2657190B1 (en) * 1990-01-18 1995-07-21 Thomson Csf DEVICE FOR READING OBLONG SEGMENTS OF A SCROLLING SUPPORT.
JPH0589477A (en) * 1991-09-27 1993-04-09 Pioneer Electron Corp Optical disk
JP3145751B2 (en) * 1991-12-03 2001-03-12 パイオニア株式会社 Optical pickup device
IL101570A0 (en) * 1992-04-10 1992-12-30 Amir Alon Method and apparatus for reading data
IL106009A0 (en) * 1993-06-14 1993-10-20 Amir Alon Method and apparatus for the simultaneous writing of data on an optical disk
IL107181A0 (en) * 1993-10-04 1994-01-25 Nogatech Ltd Optical disk reader
US5920538A (en) * 1998-06-11 1999-07-06 Tandberg Data Asa Magneto-optical readout method and magneto-optical readout head and method for making same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474430A (en) * 1965-03-18 1969-10-21 Siemens Ag Magnetic record medium with edge areas of polarity opposite that of center area
GB1126999A (en) * 1966-08-05 1968-09-11 Siemens Ag A magnetic storage medium
US3629517A (en) * 1969-09-29 1971-12-21 Ibm Method and apparatus for magneto-optical reading of superimposed magnetic recordings

Also Published As

Publication number Publication date
GB2120000B (en) 1986-04-09
GB8311308D0 (en) 1983-06-02
GB2120000A (en) 1983-11-23
GB2120001A (en) 1983-11-23
GB2120001B (en) 1985-10-30

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee