CA954216A - Method and apparatus for magneto-optically scanning a moving magnetic storage medium - Google Patents

Method and apparatus for magneto-optically scanning a moving magnetic storage medium

Info

Publication number
CA954216A
CA954216A CA130,476A CA130476A CA954216A CA 954216 A CA954216 A CA 954216A CA 130476 A CA130476 A CA 130476A CA 954216 A CA954216 A CA 954216A
Authority
CA
Canada
Prior art keywords
magneto
storage medium
magnetic storage
moving magnetic
optically scanning
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.)
Expired
Application number
CA130,476A
Other languages
English (en)
Other versions
CA130476S (en
Inventor
Marian A. Grimm
Richard F. M. Thornley
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of CA954216A publication Critical patent/CA954216A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C13/00Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • G11C13/06Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using magneto-optical elements
    • 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 thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532Heads
    • G11B11/10541Heads for reproducing
    • G11B11/10543Heads for reproducing using optical beam of radiation
    • G11B11/10547Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
CA130,476A 1970-12-21 1971-12-20 Method and apparatus for magneto-optically scanning a moving magnetic storage medium Expired CA954216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9991570A 1970-12-21 1970-12-21

Publications (1)

Publication Number Publication Date
CA954216A true CA954216A (en) 1974-09-03

Family

ID=22277230

Family Applications (1)

Application Number Title Priority Date Filing Date
CA130,476A Expired CA954216A (en) 1970-12-21 1971-12-20 Method and apparatus for magneto-optically scanning a moving magnetic storage medium

Country Status (6)

Country Link
CA (1) CA954216A (de)
CH (1) CH532820A (de)
DE (1) DE2163121A1 (de)
FR (1) FR2119336A5 (de)
GB (1) GB1316917A (de)
IT (1) IT941329B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133537A (en) * 1981-02-06 1982-08-18 Sharp Corp Magnetic and optical recording and reproducing head
FR2514913B1 (fr) * 1981-10-16 1986-07-04 Bull Sa Dispositif opto-electronique de lecture d'informations contenues sur un support magnetique
US4562502A (en) * 1982-04-28 1985-12-31 Tdk Corporation Optical reproducing system
US4564877A (en) * 1982-04-28 1986-01-14 Tdk Corporation Magnetic recording/reproducing system with wide-gapped transducer and method for using same

Also Published As

Publication number Publication date
IT941329B (it) 1973-03-01
DE2163121A1 (de) 1972-07-13
FR2119336A5 (de) 1972-08-04
CH532820A (de) 1973-01-15
GB1316917A (en) 1973-05-16

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