JPS63269356A - Magneto-optical disk and its recording and reproducing device - Google Patents

Magneto-optical disk and its recording and reproducing device

Info

Publication number
JPS63269356A
JPS63269356A JP10585487A JP10585487A JPS63269356A JP S63269356 A JPS63269356 A JP S63269356A JP 10585487 A JP10585487 A JP 10585487A JP 10585487 A JP10585487 A JP 10585487A JP S63269356 A JPS63269356 A JP S63269356A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
track
magneto
information
information track
optical signal
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
JP10585487A
Inventor
Takeo Tanaka
Original Assignee
Mitsubishi Electric 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

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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
    • G11B11/105Recording 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 thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing

Abstract

PURPOSE:To improve the accuracy of the recording and reproduction of a magneto- optical signal, by providing a first information track which records the magneto-optical signal, and a second information track provided along each track of the first information track and on which a control signal including address information at every track is recorded in advance on a magneto-optical disk. CONSTITUTION:A reloadable first information track 103 provided concentrically and spirally for a rotating central axis, and the second information track 104 provided along each track of the first information track and on which the control signal including the address information at every track is recorded in advance are provided. And by projecting a recording laser beam 206 on either the first information track 103 or the second information track 104, and projecting a reproducing laser beam 208 on the other of the first information track 103 or the second information track 104, the magneto-optical signal can be recorded and reproduced as performing the reproduction of the control signal. In such a way, it is possible to prevent interference between the magneto-optical signal and an information signal from being generated, and to record and reproduce the magneto-optical signal with high accuracy.
JP10585487A 1987-04-28 1987-04-28 Magneto-optical disk and its recording and reproducing device Pending JPS63269356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10585487A JPS63269356A (en) 1987-04-28 1987-04-28 Magneto-optical disk and its recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10585487A JPS63269356A (en) 1987-04-28 1987-04-28 Magneto-optical disk and its recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS63269356A true true JPS63269356A (en) 1988-11-07

Family

ID=14418579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10585487A Pending JPS63269356A (en) 1987-04-28 1987-04-28 Magneto-optical disk and its recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS63269356A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559449A2 (en) * 1992-03-05 1993-09-08 Fujitsu Limited Optical disk, optical disk unit and optical disk producing method
EP0575934A2 (en) * 1992-06-23 1993-12-29 Deutsche Thomson-Brandt GmbH Recording and reproduction of information in ROM-RAM storage media
US6630082B2 (en) 1995-06-26 2003-10-07 Pioneer Electronic Corporation Optical disc, and reading system and manufacturing method of the disc

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559449A2 (en) * 1992-03-05 1993-09-08 Fujitsu Limited Optical disk, optical disk unit and optical disk producing method
EP0559449A3 (en) * 1992-03-05 1994-02-09 Fujitsu Ltd Optical disk, optical disk unit and optical disk producing method
EP0575934A2 (en) * 1992-06-23 1993-12-29 Deutsche Thomson-Brandt GmbH Recording and reproduction of information in ROM-RAM storage media
EP0575934A3 (en) * 1992-06-23 1994-05-11 Thomson Brandt Gmbh Recording and reproduction of information in rom-ram storage media
US6630082B2 (en) 1995-06-26 2003-10-07 Pioneer Electronic Corporation Optical disc, and reading system and manufacturing method of the disc
US7379399B2 (en) 1995-06-26 2008-05-27 Pioneer Corporation Optical disc, and reading system and manufacturing method of the disc

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