MX173662B - Mejoras en aparato y metodo para medio de registro magnetico - Google Patents

Mejoras en aparato y metodo para medio de registro magnetico

Info

Publication number
MX173662B
MX173662B MX017976A MX1797687A MX173662B MX 173662 B MX173662 B MX 173662B MX 017976 A MX017976 A MX 017976A MX 1797687 A MX1797687 A MX 1797687A MX 173662 B MX173662 B MX 173662B
Authority
MX
Mexico
Prior art keywords
magnetic recording
media
magnetic
light
read
Prior art date
Application number
MX017976A
Other languages
English (en)
Inventor
William T Plummer
Vernon E Ford
Jeremy K Jones
John J Mader
Original Assignee
Polaroid 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 Polaroid Corp filed Critical Polaroid Corp
Publication of MX173662B publication Critical patent/MX173662B/es

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
    • 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
    • G11B5/82—Disk carriers

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

La presente invención se refiere a aparato para usarse con un medio de registro magnético, del tipo que comprende un medio de registro magnético transmisor de luz, que comprende un soporte transparente, una capa continua transmisora de luz, de material de registro magnético, llevada en uno o ambos lados del soporte transparente; llevando también el soporte transparente una retícula óptica, transmisora de luz, por lo menos sustancialmente coextensiva con el área sobre la cual están registradas pistas magnéticas; caracterizado dicho aparato porque comprende: una cabeza de lectura/escritura; medios para situar un medio de registro magnético, del tipo mencionado, en relación de lectura/escritura con la cabeza de lectura/escritura y para mover el medio de registro magnético en relación con la cabeza de lectura/escritura, para generar señales de lectura/escritura; medios fotodetectores adaptados para proveer una señal eléctrica, como una función de la luz incidente sobre ellos; incluyendo los medios fotodetectores una retícula óptica transmisora de luz, de referencia, adaptada, en combinación con la retícula óptica en el medio de registro magnético, para proveer un patrón detectable por los medios fotodetectores; estando adaptados los medios fotodetectores para proveer señales eléctricas indicativas de la luz incidente sobre ellos; una fuente luminosa, situada para proyectar luz a través del medio de registro magnético a los medios fotodetectores; medios para comparar los cambios en las señales eléctricas como una función de los cambios en el patrón, en respuesta al movimiento relativo de las retículas ópticas con respecto a l retícula óptica en el medio de registro magnético; y servo-medios para cambiar la posición de la cabeza de lectura/escritura en respuesta a los cambios en el patrón mencionado, para mantener la cabeza de lectura/escritura de alineación con una pista magnética seleccionada.
MX017976A 1986-08-21 1987-08-21 Mejoras en aparato y metodo para medio de registro magnetico MX173662B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/898,527 US4816939A (en) 1986-08-21 1986-08-21 Magnetic recording media and servo systems using light-transmitting optical gratings

Publications (1)

Publication Number Publication Date
MX173662B true MX173662B (es) 1994-03-22

Family

ID=25409580

Family Applications (2)

Application Number Title Priority Date Filing Date
MX017976A MX173662B (es) 1986-08-21 1987-08-21 Mejoras en aparato y metodo para medio de registro magnetico
MX7838A MX160092A (es) 1986-08-21 1987-08-21 Mejoras en sistema de registro magnetico para leer y/o escribir datos

Family Applications After (1)

Application Number Title Priority Date Filing Date
MX7838A MX160092A (es) 1986-08-21 1987-08-21 Mejoras en sistema de registro magnetico para leer y/o escribir datos

Country Status (14)

Country Link
US (1) US4816939A (es)
EP (1) EP0257713B1 (es)
JP (1) JP2752071B2 (es)
KR (1) KR970007248B1 (es)
CN (1) CN1012327B (es)
AT (1) ATE104790T1 (es)
AU (1) AU593484B2 (es)
BR (1) BR8707444A (es)
CA (1) CA1280206C (es)
DE (1) DE3789640T2 (es)
DK (1) DK213888A (es)
ES (1) ES2055698T3 (es)
MX (2) MX173662B (es)
WO (1) WO1988001423A2 (es)

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WO2000049604A1 (fr) 1999-02-16 2000-08-24 Quantum Corporation Procede d'ecriture de signaux d'asservissement sur une bande magnetique
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
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US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape
US6493174B1 (en) * 2000-02-17 2002-12-10 Imation Corp. Optical servo system for use with magnetic data storage tape having magnetic reference indicators
US6940676B1 (en) 2000-06-07 2005-09-06 Quantum Corporation Triple push-pull optical tracking system
TW550551B (en) * 2000-07-28 2003-09-01 Koninkl Philips Electronics Nv Magnetic scanning system
US7227717B1 (en) * 2001-06-18 2007-06-05 Seagate Technology Llc Asymmetric disk surface properties in one head disk drives
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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
US7136255B2 (en) * 2003-10-20 2006-11-14 Quantum Corporation Servo methods and systems using masked medium edge position sensors
US7139152B2 (en) * 2003-10-20 2006-11-21 Quantum Corporation Servo methods and systems using existing data structures and optical masks
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Also Published As

Publication number Publication date
DE3789640D1 (de) 1994-05-26
EP0257713A3 (en) 1988-05-11
KR880701938A (ko) 1988-11-07
AU7912987A (en) 1988-03-08
DK213888D0 (da) 1988-04-20
JP2752071B2 (ja) 1998-05-18
DE3789640T2 (de) 1994-08-04
CA1280206C (en) 1991-02-12
WO1988001423A2 (en) 1988-02-25
WO1988001423A3 (en) 1988-04-07
BR8707444A (pt) 1988-11-01
CN1012327B (zh) 1991-04-10
ES2055698T3 (es) 1994-09-01
AU593484B2 (en) 1990-02-08
DK213888A (da) 1988-04-20
EP0257713B1 (en) 1994-04-20
US4816939A (en) 1989-03-28
KR970007248B1 (ko) 1997-05-07
JPH01500625A (ja) 1989-03-01
EP0257713A2 (en) 1988-03-02
MX160092A (es) 1989-11-27
ATE104790T1 (de) 1994-05-15
CN87105814A (zh) 1988-03-02

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