JPS6453365A - Rewritable magneto-optical disk - Google Patents

Rewritable magneto-optical disk

Info

Publication number
JPS6453365A
JPS6453365A JP20927687A JP20927687A JPS6453365A JP S6453365 A JPS6453365 A JP S6453365A JP 20927687 A JP20927687 A JP 20927687A JP 20927687 A JP20927687 A JP 20927687A JP S6453365 A JPS6453365 A JP S6453365A
Authority
JP
Japan
Prior art keywords
pit
disk
pits
track
revolution
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
JP20927687A
Other languages
Japanese (ja)
Other versions
JP2703765B2 (en
Inventor
Takeo Tanaka
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.)
Mitsubishi Electric Corp
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
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP20927687A priority Critical patent/JP2703765B2/en
Publication of JPS6453365A publication Critical patent/JPS6453365A/en
Application granted granted Critical
Publication of JP2703765B2 publication Critical patent/JP2703765B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/24—Arrangements for providing constant relative speed between record carrier and head

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To obtain a disk large in capacity possible to be CLV-driven, by making a pre-recorded pit interval relate to the constant pitch of a track so that proper information and rotational phase information at every pit string led by pits arranged linearly in a radiant direction can be supplied. CONSTITUTION:Plural pits 43 are arranged irregularly with equal intervals on a spiral center line 42 which separates adjacent tracks 31 virtually in an unerasable state successively. Also, plural pit strings per one revolution led by the pits 43 arranged linearly in the radiant direction are formed. In such a case, a pit interval (l) which becomes the minimum unit distance is set at a value given as l=2pi.P/N assuming the number of pit strings existing per one revolution on the disk as N, and the constant pitch of the track 31 as P. In such a way, it is possible to obtain the disk without generating a phase difference even in track jump by using CLV driving large in recording capacity.
JP20927687A 1987-08-25 1987-08-25 Rewritable magneto-optical disk Expired - Lifetime JP2703765B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20927687A JP2703765B2 (en) 1987-08-25 1987-08-25 Rewritable magneto-optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20927687A JP2703765B2 (en) 1987-08-25 1987-08-25 Rewritable magneto-optical disk

Publications (2)

Publication Number Publication Date
JPS6453365A true JPS6453365A (en) 1989-03-01
JP2703765B2 JP2703765B2 (en) 1998-01-26

Family

ID=16570263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20927687A Expired - Lifetime JP2703765B2 (en) 1987-08-25 1987-08-25 Rewritable magneto-optical disk

Country Status (1)

Country Link
JP (1) JP2703765B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03180537A (en) * 1989-12-05 1991-08-06 Toray Ind Inc Heat treating device of yarn
US5199021A (en) * 1990-04-18 1993-03-30 Canon Kabushiki Kaisha Method of access to recording medium, and apparatus and method for processing information
US5255259A (en) * 1990-04-18 1993-10-19 Canon Kabushiki Kaisha Method of access to recording medium, and apparatus and method for processing information

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03180537A (en) * 1989-12-05 1991-08-06 Toray Ind Inc Heat treating device of yarn
US5199021A (en) * 1990-04-18 1993-03-30 Canon Kabushiki Kaisha Method of access to recording medium, and apparatus and method for processing information
US5255259A (en) * 1990-04-18 1993-10-19 Canon Kabushiki Kaisha Method of access to recording medium, and apparatus and method for processing information

Also Published As

Publication number Publication date
JP2703765B2 (en) 1998-01-26

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