JPS5677907A - Optical magnetic recorder/reproducer - Google Patents

Optical magnetic recorder/reproducer

Info

Publication number
JPS5677907A
JPS5677907A JP15404279A JP15404279A JPS5677907A JP S5677907 A JPS5677907 A JP S5677907A JP 15404279 A JP15404279 A JP 15404279A JP 15404279 A JP15404279 A JP 15404279A JP S5677907 A JPS5677907 A JP S5677907A
Authority
JP
Japan
Prior art keywords
magnetic
information
reproducer
recorded
micro region
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
JP15404279A
Other languages
Japanese (ja)
Other versions
JPH0245248B2 (en
Inventor
Shinya Sano
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15404279A priority Critical patent/JPS5677907A/en
Publication of JPS5677907A publication Critical patent/JPS5677907A/en
Publication of JPH0245248B2 publication Critical patent/JPH0245248B2/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
    • 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
    • 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
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • G11B13/045—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties combined recording by magnetic and optic means
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To realize a high-accuracy reproduction through an optical recorder/reproducer, by incorporating the laser beam heating means which heats up the micro region of a magnetic substance, the detecting means of line of magnetic force which detects the change of the residual magnetization of the micro region and the shifting means of the magnetic substance. CONSTITUTION:The micro region spot 7 on the magnetic region is heated up by the laser beam 5 while giving the change of magnetic field based on the recording information through the magnetic head which functions as a detecting means of the line of magnetic force. Then the tape 1 is made to travel to record the information on the track 8. The information thus recorded is traced again by the same device, and thus the micro region recorded is heated up to reduce the residual magnetization. This change of reduction is detected through the magnetic head 4 and then processed through a detection circuit to read out the recorded information. As a result, a recorder/reproducer which can reproduce in a high accuracy the information immediately after recording with no transfer can be obtained through a simple constitution.
JP15404279A 1979-11-27 1979-11-27 Optical magnetic recorder/reproducer Granted JPS5677907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15404279A JPS5677907A (en) 1979-11-27 1979-11-27 Optical magnetic recorder/reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15404279A JPS5677907A (en) 1979-11-27 1979-11-27 Optical magnetic recorder/reproducer

Publications (2)

Publication Number Publication Date
JPS5677907A true JPS5677907A (en) 1981-06-26
JPH0245248B2 JPH0245248B2 (en) 1990-10-08

Family

ID=15575642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15404279A Granted JPS5677907A (en) 1979-11-27 1979-11-27 Optical magnetic recorder/reproducer

Country Status (1)

Country Link
JP (1) JPS5677907A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5081505A (en) * 1973-11-20 1975-07-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5081505A (en) * 1973-11-20 1975-07-02

Also Published As

Publication number Publication date
JPH0245248B2 (en) 1990-10-08

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