GB1580986A - Magnetic recording or reading - Google Patents

Magnetic recording or reading Download PDF

Info

Publication number
GB1580986A
GB1580986A GB14799/77A GB1479977A GB1580986A GB 1580986 A GB1580986 A GB 1580986A GB 14799/77 A GB14799/77 A GB 14799/77A GB 1479977 A GB1479977 A GB 1479977A GB 1580986 A GB1580986 A GB 1580986A
Authority
GB
United Kingdom
Prior art keywords
tracks
optical
track
information carrier
aperture
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
GB14799/77A
Other languages
English (en)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB1580986A publication Critical patent/GB1580986A/en
Expired 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • 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
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59677—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks with optical servo tracking
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Magnetic Record Carriers (AREA)
  • Optical Recording Or Reproduction (AREA)
GB14799/77A 1976-04-10 1977-04-07 Magnetic recording or reading Expired GB1580986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2615838A DE2615838C2 (de) 1976-04-10 1976-04-10 Vorrichtung zur Positionsregelung eines Schreib-Lesekopfes für Datenträger mit einer Magnetspeicherschicht

Publications (1)

Publication Number Publication Date
GB1580986A true GB1580986A (en) 1980-12-10

Family

ID=5975091

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14799/77A Expired GB1580986A (en) 1976-04-10 1977-04-07 Magnetic recording or reading

Country Status (5)

Country Link
US (1) US4123788A (enExample)
JP (1) JPS5918781B2 (enExample)
DE (1) DE2615838C2 (enExample)
FR (1) FR2347744A1 (enExample)
GB (1) GB1580986A (enExample)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321621A (en) * 1976-04-08 1982-03-23 Victor Company Of Japan, Ltd. High density recording system using side-by-side information and servo tracks
US4315283A (en) * 1976-04-08 1982-02-09 Victor Company Of Japan, Ltd. High density recording system using side-by-side information and servo tracks
US4404599A (en) * 1976-04-08 1983-09-13 Victor Company Of Japan, Ltd. Laser recording information and pilot signals for tracking on a grooveless recording
CA1130456A (en) * 1976-04-08 1982-08-24 Hisao Kinjo Information signal recording system
US4322836A (en) * 1976-04-08 1982-03-30 Victor Company Of Japan, Ltd. High density recording system using side-by side information and servo tracks
NL7705111A (nl) * 1977-05-10 1978-11-14 Philips Nv Magneetband met optische waarneembare mar- keringen en werkwijze voor het vervaardigen van een dergelijke band.
NL7712418A (nl) * 1977-11-11 1979-05-15 Philips Nv Opteken- en/of weergeefinrichting voor een bandvormige magnetische registratiedrager voor- zien van een regelsysteem voor de positionering van de magneetkop.
NL7802860A (nl) * 1978-03-16 1979-09-18 Philips Nv Registratiedragerlichaam en registratiedrager voor optische informatie en inrichting voor het inschrijven en uitlezen.
JPS55125584A (en) * 1979-03-22 1980-09-27 Pioneer Electronic Corp Information recording disk with encoder
US4380032A (en) * 1980-04-25 1983-04-12 Newell Research Corporation Tape system with optically contrasting data marks
JPS58147847A (ja) * 1982-02-26 1983-09-02 Olympus Optical Co Ltd トラツキング情報検出装置
US4633451A (en) * 1982-06-30 1986-12-30 International Business Machines Corporation Optical servo for magnetic disks
EP0097774A3 (en) * 1982-06-30 1986-02-05 International Business Machines Corporation Transducing system
EP0167570A1 (en) * 1983-12-27 1986-01-15 Ncr Corporation Magnetic record medium and apparatus and method for tracking the same
US4570191A (en) * 1984-07-20 1986-02-11 International Business Machines Corporation Optical sensor for servo position control
DE3511157A1 (de) * 1985-03-27 1986-10-02 Bruno 8729 Ebelsbach Kessler Datentraegerband mit schaltstreifen sowie verfahren und vorrichtung zu dessen herstellung
US4958245A (en) * 1988-04-07 1990-09-18 Insite Peripherals, Inc. Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities
US4912585A (en) * 1988-04-28 1990-03-27 International Business Machines Corporation Discrete track thin film magnetic recording disk with embedded servo information
US5208706A (en) * 1988-10-24 1993-05-04 Lemelson Jerome H Magnetic reproduction apparatus and method
US5121371A (en) * 1990-06-18 1992-06-09 Bernoulli Optical Systems Company Optical servo system for magnetic disk
US5563868A (en) * 1990-06-18 1996-10-08 Matsushita-Kotobuki Electronics Industries, Ltd. Optical servo system for magnetic disk
US5210672A (en) * 1990-11-09 1993-05-11 Insite Peripherals, Inc. Magnetically indelible media type identification system
EP0484780A1 (en) * 1990-11-09 1992-05-13 Insite Peripherals, Inc. Stitched servo pattern and method for positioning an optical-magnetic read/write head
GB9224003D0 (en) * 1992-11-16 1993-01-06 Minnesota Mining & Mfg Magnetic recording materials
JP3311863B2 (ja) * 1994-06-24 2002-08-05 富士通株式会社 ディスク装置
JPH0855381A (ja) * 1994-08-15 1996-02-27 Hitachi Maxell Ltd 磁気デイスク
US6118632A (en) * 1997-02-12 2000-09-12 International Business Machines Corporation Magnetic disk stack having laser-bump identifiers on magnetic disks
US20030054203A1 (en) * 1997-10-22 2003-03-20 Quantum Corporation, A California Corporation Magnetic tape
US7029726B1 (en) 1999-07-27 2006-04-18 Quantum Corporation Method for forming a servo pattern on a magnetic tape
GB2335785B (en) 1998-03-24 2002-09-18 Quantum Corp Multi-channel magnetic tape system having optical tracking servo
US7153366B1 (en) 1998-03-24 2006-12-26 Quantum Corporation Systems and method for forming a servo pattern on a magnetic tape
DE19850055C1 (de) * 1998-09-03 2000-05-11 Georgsmarienhuette Gmbh Vorrichtung zur zerstörungsfreien Prüfung von insbesondere heißem stabförmigem Walzmaterial
AU2441099A (en) 1999-02-16 2000-09-04 Quantum Corporation Method of writing servo signal on magnetic tape
JP4286457B2 (ja) 1999-02-17 2009-07-01 クウォンタム・コーポレイション 磁気テープへのサーボ信号書き込み方法
US6961200B2 (en) * 1999-07-27 2005-11-01 Quantum Corporation Optical servo track identification on tape storage media
US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape
US6940676B1 (en) 2000-06-07 2005-09-06 Quantum Corporation Triple push-pull optical tracking system
US6940681B2 (en) 2001-08-20 2005-09-06 Quantum Corporation Optical to magnetic alignment in magnetic tape system
US6856484B2 (en) 2001-09-05 2005-02-15 Quantum Corporation Magnetic servo of a recording head
US7023650B2 (en) 2001-11-07 2006-04-04 Quantum Corporation Optical sensor to recording head alignment
US7187515B2 (en) 2003-02-05 2007-03-06 Quantum Corporation Method and system for tracking magnetic media with embedded optical servo tracks
US6980390B2 (en) 2003-02-05 2005-12-27 Quantum Corporation Magnetic media with embedded optical servo tracks
JP2006031855A (ja) * 2004-07-16 2006-02-02 Toshiba Corp 磁気ディスクおよびこれを備えた磁気ディスク装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365706A (en) * 1964-04-15 1968-01-23 Gilbert W. King Photo-optical data storage and retrieval system employing error detection and error location identification components
US3438050A (en) * 1965-01-06 1969-04-08 Itek Corp Laser data recorder
CH499847A (fr) * 1968-06-13 1970-11-30 Cie Internationale Pour La Dif Procédé de préparation d'une bande magnétique et bande magnétique résultant du procédé
US3673412A (en) * 1970-03-02 1972-06-27 Trw Inc Radiant energy beam scanning method and apparatus
GB1369155A (en) * 1972-01-19 1974-10-02 Int Computers Ltd Servo systems
US4038679A (en) * 1974-02-14 1977-07-26 U.S. Philips Corporation Apparatus for reading an optically recorded record carrier provided with periodic surface undulations and for deriving a focussing control signal from such surface undulations
US3919697A (en) * 1974-06-26 1975-11-11 Battelle Development Corp Data record tracking using track identifying information in the gaps between recorded data groups
FR2315142A1 (fr) * 1975-06-17 1977-01-14 Pyral Soc Procede de guidage d'une tete d'enregistrement et/ou de lecture d'un support magnetique

Also Published As

Publication number Publication date
FR2347744B1 (enExample) 1984-01-27
JPS52124312A (en) 1977-10-19
DE2615838A1 (de) 1977-10-27
JPS5918781B2 (ja) 1984-04-28
US4123788A (en) 1978-10-31
DE2615838C2 (de) 1985-02-07
FR2347744A1 (fr) 1977-11-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee