JPS6489002A - Magnetic field impressing device for magneto-optical disk - Google Patents

Magnetic field impressing device for magneto-optical disk

Info

Publication number
JPS6489002A
JPS6489002A JP24624187A JP24624187A JPS6489002A JP S6489002 A JPS6489002 A JP S6489002A JP 24624187 A JP24624187 A JP 24624187A JP 24624187 A JP24624187 A JP 24624187A JP S6489002 A JPS6489002 A JP S6489002A
Authority
JP
Japan
Prior art keywords
deleting
recording
magnetic field
spots
magnetic fields
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.)
Pending
Application number
JP24624187A
Other languages
Japanese (ja)
Inventor
Kazuya Taki
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.)
Brother Industries Ltd
Original Assignee
Brother Industries 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 Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP24624187A priority Critical patent/JPS6489002A/en
Publication of JPS6489002A publication Critical patent/JPS6489002A/en
Pending 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
    • G11B11/10532—Heads
    • 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
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G11B11/10536—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using thermic beams, e.g. lasers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To impress magnetic fields, in which directions are mutually reverse, to respective irradiating points by detecting a transmitting light from the recording and deleting spots of an optical magnetic disk or an infrared emitted from the heated recording and deleting spots through transparent gaps. CONSTITUTION:A first light spot 8a is successively projected, simultaneously, the magnetic field in a prescribed direction is impressed, and information recorded beforehand is deleted. Simultaneously, a second light spot 8b modulated by a signal to be newly recorded is projected, simultaneously, the information is rewritten by impressing the magnetic field in which the direction is reverse to the time of deleting, and an overlight is executed. Further, through transparent gaps 35 and 36, the transmitting light and infrared from the recording or deleting spot on an optical magnetic disk 6 are detected, and the impressing positions of the magnetic fields are controlled. Thus, the magnetic fields in the mutually reverse directions can be always impressed to the recording and deleting spots.
JP24624187A 1987-09-30 1987-09-30 Magnetic field impressing device for magneto-optical disk Pending JPS6489002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24624187A JPS6489002A (en) 1987-09-30 1987-09-30 Magnetic field impressing device for magneto-optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24624187A JPS6489002A (en) 1987-09-30 1987-09-30 Magnetic field impressing device for magneto-optical disk

Publications (1)

Publication Number Publication Date
JPS6489002A true JPS6489002A (en) 1989-04-03

Family

ID=17145606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24624187A Pending JPS6489002A (en) 1987-09-30 1987-09-30 Magnetic field impressing device for magneto-optical disk

Country Status (1)

Country Link
JP (1) JPS6489002A (en)

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