HK91391A - Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses and apparatus for forming said structure - Google Patents

Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses and apparatus for forming said structure

Info

Publication number
HK91391A
HK91391A HK913/91A HK91391A HK91391A HK 91391 A HK91391 A HK 91391A HK 913/91 A HK913/91 A HK 913/91A HK 91391 A HK91391 A HK 91391A HK 91391 A HK91391 A HK 91391A
Authority
HK
Hong Kong
Prior art keywords
record
forming
body provided
carrier body
optically detectable
Prior art date
Application number
HK913/91A
Other languages
English (en)
Inventor
Johannes Hermanus Theod Pasman
Nicolaas Cornelis Jo Hijningen
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of HK91391A publication Critical patent/HK91391A/xx

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00745—Sectoring or header formats within a track
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0938—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following servo format, e.g. guide tracks, pilot signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24073—Tracks
    • G11B7/24079—Width or depth

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
HK913/91A 1985-01-22 1991-11-14 Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses and apparatus for forming said structure HK91391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8500153A NL8500153A (nl) 1985-01-22 1985-01-22 Registratiedragerlichaam voorzien van een reliefstruktuur van optisch detekteerbare servospoorgedeelten en sektoradressen en inrichting voor het aanbrengen van deze struktuur.

Publications (1)

Publication Number Publication Date
HK91391A true HK91391A (en) 1991-11-22

Family

ID=19845400

Family Applications (1)

Application Number Title Priority Date Filing Date
HK913/91A HK91391A (en) 1985-01-22 1991-11-14 Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses and apparatus for forming said structure

Country Status (8)

Country Link
US (2) US4893298A (fr)
EP (1) EP0189948B1 (fr)
JP (1) JP2603612B2 (fr)
AU (1) AU584662B2 (fr)
CA (1) CA1249659A (fr)
DE (1) DE3670168D1 (fr)
HK (1) HK91391A (fr)
NL (1) NL8500153A (fr)

Families Citing this family (80)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4949331A (en) * 1985-06-19 1990-08-14 Hitachi, Ltd. Apparatus and record carrier for optical disc memory with correction pattern and master disc cutting apparatus
DE3864408D1 (de) * 1987-01-19 1991-10-02 Sony Corp Vorrichtung zur aufzeichnung auf platten.
EP0306324B2 (fr) * 1987-09-02 1998-11-25 Sharp Kabushiki Kaisha Système de mémorisation optique
JPH01169741A (ja) * 1987-12-24 1989-07-05 Nec Corp トラック極性検出装置
NL8800255A (nl) * 1988-02-03 1989-09-01 Philips Nv Optische registratiedrager.
EP0328212A1 (fr) * 1988-02-11 1989-08-16 Koninklijke Philips Electronics N.V. Procédé pour la réalisation d'une matrice métallique et plaque mère permettant de réaliser des matrices
US4961123A (en) * 1988-06-03 1990-10-02 Insite Peripherals Magnetic information media storage with optical servo tracks
JPH02156423A (ja) * 1988-12-07 1990-06-15 Nec Corp 光ディスク媒体
US5257250A (en) * 1988-12-16 1993-10-26 Matsushita Electric Industrial Co., Ltd. Tracking-control target-position adjustment method
DE3923328A1 (de) * 1989-07-14 1991-01-24 Thomson Brandt Gmbh Magneto-optisches aufnahme- und/oder wiedergabegeraet
JPH03142717A (ja) * 1989-10-27 1991-06-18 Ricoh Co Ltd 光ディスク
US5138598A (en) * 1990-01-25 1992-08-11 Sony Corporation Optical disk having relatively wide ram tracks and relatively narrow rom tracks
US5204852A (en) * 1990-02-17 1993-04-20 Victor Company Of Japan, Ltd. Optical disc-like recoding medium and manufacturing method thereof
US5293366A (en) * 1990-07-26 1994-03-08 Canon Kabushiki Kaisha Information recording and reproducing apparatus provided with means for adding to a tracking signal offset corresponding to the positional deviation of a recording spot and a reproducing spot
US5368986A (en) * 1991-05-02 1994-11-29 Hitachi, Ltd. Information recording media, manufacturing method for the same, and information recording method
US5173598A (en) * 1991-05-10 1992-12-22 U.S. Philips Corporation Optical scanning beam position control system which is free of modulation by tracking error
JPH05242521A (ja) * 1992-02-27 1993-09-21 Pioneer Electron Corp 光ディスクプレーヤ
JP2582996B2 (ja) * 1992-06-12 1997-02-19 インターナショナル・ビジネス・マシーンズ・コーポレイション フォトマスクの製造方法
US5432047A (en) * 1992-06-12 1995-07-11 International Business Machines Corporation Patterning process for bipolar optical storage medium
US5398226A (en) * 1992-06-25 1995-03-14 Minnesota Mining And Manufacturing Company Image tracking of optical media using two wavelength optical head
DE69313538T2 (de) * 1992-07-03 1998-02-26 Philips Electronics Nv In Bereiche unterteilter Aufzeichnungsträger
JP3287634B2 (ja) * 1993-03-12 2002-06-04 パイオニア株式会社 光ディスク及び光ディスク再生装置
US5471455A (en) * 1994-05-17 1995-11-28 Jabr; Salim N. High density optical storage system
JP3150850B2 (ja) * 1994-07-08 2001-03-26 シャープ株式会社 光磁気ディスク原盤の製造方法
TW305991B (fr) * 1994-07-25 1997-05-21 Canon Kk
KR100213270B1 (ko) * 1994-12-27 1999-08-02 전주범 양면 디스크용 광 픽업
US6233077B1 (en) * 1995-05-11 2001-05-15 Ciena Corporation Remodulating channel selectors for WDM optical communication systems
KR100205425B1 (ko) * 1995-11-21 1999-07-01 구자홍 광 디스크의 기록재생장치 및 방법
DE19643214A1 (de) * 1996-10-19 1998-04-30 Fuji Magnetics Gmbh Leitstrukturen in optischen Speichermedien
US7239602B2 (en) * 1998-08-27 2007-07-03 Ricoh Company, Ltd. Optical information recording medium with a partition wall between an information tracks groove and a preformat pit encoding information therefor
GB2335785B (en) 1998-03-24 2002-09-18 Quantum Corp Multi-channel magnetic tape system having optical tracking servo
US6157592A (en) * 1998-07-06 2000-12-05 Resolution Displays, Inc. Acoustic position determination method and apparatus
AU2441099A (en) 1999-02-16 2000-09-04 Quantum Corporation Method of writing servo signal on magnetic tape
WO2000049605A1 (fr) 1999-02-17 2000-08-24 Quantum Corporation Procede d'ecriture de signaux d'asservissement sur une bande magnetique
US6580683B1 (en) 1999-06-23 2003-06-17 Dataplay, Inc. Optical recording medium having a master data area and a writeable data area
US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape
US7492675B2 (en) * 2001-01-25 2009-02-17 Dphi Acquisitions, Inc. Digital servo system with calibrated notch filters
US7260031B2 (en) 2001-01-25 2007-08-21 Dphi Acquisitions, Inc. Digital focus and tracking servo system with one-track jump
US6965547B2 (en) * 2001-01-25 2005-11-15 Dphi Acquisitions, Inc. Tracking and focus servo system with error signal inverse non-linearity calibration
US7023766B2 (en) 2001-01-25 2006-04-04 Dphi Acquisitions, Inc. Flexible servicing of servo algorithms using a digital signal processor
US6813226B2 (en) 2001-01-25 2004-11-02 Dphi Acquisitions, Inc. Calibration of a focus sum threshold in a focus servo system
US7522480B2 (en) 2001-01-25 2009-04-21 Dphi Acquisitions, Inc. Digital tracking servo system with multi-track seek with an acceleration clamp
US7023776B2 (en) * 2001-01-25 2006-04-04 Dphi Acquisitions, Inc. Calibration initiation methods for a tracking and focus servo system
US7414940B2 (en) 2001-01-25 2008-08-19 Dphi Acquisitions, Inc. Calibration of a focus error signal gain in a focus servo system
US6950380B2 (en) * 2001-01-25 2005-09-27 Dphi Acquisitions, Inc. Detector input dark current offset calibration in an optical disk drive digital servo
US6956797B2 (en) * 2001-01-25 2005-10-18 Dphi Acquisitions, Inc. Digital servo system with error signal integrity testing
US6738320B2 (en) 2001-01-25 2004-05-18 Dphi Acquisitions, Inc. System and method for moving optical pick up from current position to target position with smooth control
US7016280B2 (en) * 2001-01-25 2006-03-21 Dphi Acquisitions, Inc. Tracking and focus servo system with defect detection
US6904007B2 (en) * 2001-01-25 2005-06-07 Dphi Acquisitions, Inc. Digital servo system with loop gain calibration
US7020054B2 (en) * 2001-01-25 2006-03-28 Dphi Acquisitions, Inc. Digital servo system with biased feed-forward
US6882603B2 (en) * 2001-01-25 2005-04-19 Dphi Acquisitions, Inc. Digital tracking servo system with tracking skate detection
US7095683B2 (en) * 2001-01-25 2006-08-22 Dphi Acquisitions, Inc. Tracking and focus digital servo system with write abort
US6970403B2 (en) * 2001-01-25 2005-11-29 Dphi Acquisition, Inc. Calibration of tracking error signal offset in a tracking servo system
US6847597B2 (en) 2001-01-25 2005-01-25 Dphi Acquisitions, Inc. Optical disk drive with a digital focus and tracking servo system
US6891789B2 (en) * 2001-01-25 2005-05-10 Dphi Acquisitions, Inc. Tracking and focus servo system with automatic media type detector
US6704261B2 (en) 2001-01-25 2004-03-09 Dphi Acquisitions, Inc. Spin motor control in an optical drive
US6937543B2 (en) 2001-01-25 2005-08-30 Dphi Acquisitions, Inc. Digital focus servo system with a sliding notch filter
US7672199B2 (en) 2001-01-25 2010-03-02 Dphi Acquisitions, Inc. Close focus algorithm in a digital focus servo system
US6906985B2 (en) 2001-01-25 2005-06-14 Dphi Acquisitions, Inc. Calibration of tracking error signal gain in a tracking servo system
US6847596B2 (en) 2001-01-25 2005-01-25 Dphi Acquisitions, Inc. Tracking servo system including a multi-track seek algorithm with a track zero crossing period integrity test
US7593300B2 (en) 2001-01-25 2009-09-22 Dphi Acquisitions, Inc. Digital tracking servo system with off-format detection
US6885619B2 (en) * 2001-01-25 2005-04-26 Dphi Acquisitions, Inc. Detector input stray light offset calibration in an optical disk drive
US6809995B2 (en) 2001-01-25 2004-10-26 Dphi Acquisitions, Inc. Digital focus and tracking servo system
US7782721B2 (en) * 2001-01-25 2010-08-24 Dphi Acquisitions, Inc. Digital focus and tracking servo system with multi-zone calibration
US6930963B2 (en) 2001-01-25 2005-08-16 Dphi Acquistions, Inc. Tracking and focus servo system with head load
US6813228B2 (en) 2001-01-25 2004-11-02 Dphi Acquisitions, Inc. Tracking and focus servo system with direction sensor
US6781929B2 (en) 2001-01-25 2004-08-24 Dphi Acquisitions, Inc. Digital tracking servo system with multi-track seek
US6728182B2 (en) 2001-01-25 2004-04-27 Dphi Acquisitions, Inc. Tracking and focus servo system with a media type boundary crossing detector
US6970410B2 (en) * 2001-01-25 2005-11-29 Dphi Acquisitions, Inc. Focus detection in a digital focus servo system
US6922380B2 (en) 2001-01-25 2005-07-26 Dphi Acquisitions, Inc. Tracking and focus servo system with anti-skate algorithm
US7680004B2 (en) * 2001-01-25 2010-03-16 Dphi Acquisitions, Inc. Digital servo system with inverse non-linearity compensation
US6898164B2 (en) 2001-01-25 2005-05-24 Dphi Acquisitions, Inc. Close tracking algorithm in a digital tracking servo system
US6762980B2 (en) 2001-01-25 2004-07-13 Dphi Acquisitions, Inc. Digital tracking servo system with a multi-track seeking and accelerated servo function for regaining a closed tracking loop
US6909676B2 (en) * 2001-01-25 2005-06-21 Dphi Acquisitions, Inc. Digital tracking servo system with multi-track seek with track zero crossing detection
US6958957B2 (en) * 2001-01-25 2005-10-25 Dphi Acquisitions, Inc. Digital tracking and focus servo system with TES to FES crosstalk calibration
US6891781B2 (en) * 2001-01-25 2005-05-10 Dphi Acquisitions, Inc. Digital servo system with second order compensator
US7092322B2 (en) * 2001-01-25 2006-08-15 Dphi Acquisitions, Inc. Calibration of focus error signal offset in a focus servo system
US6882601B2 (en) 2001-01-25 2005-04-19 Dphi Acquisitions, Inc. Digital servo system with feed-forward control loops
US7196979B2 (en) 2001-01-25 2007-03-27 Dphi Acquisitions, Inc. Calibration storage methods for a digital focus and tracking servo system with calibration
JP2002222548A (ja) * 2001-01-26 2002-08-09 Sony Corp 光記録媒体、光記録媒体製造用原盤、光記録媒体製造用原盤の製造装置、光記録媒体製造用原盤の製造方法

Family Cites Families (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902010A (en) * 1972-02-15 1975-08-26 Canon Kk Information recording device with record having layers with different intensity sensitivity
NL174591C (nl) * 1973-02-09 1984-07-02 Philips Nv Schijfvormig registratiedragerlichaam.
US4027330A (en) * 1973-03-27 1977-05-31 Ted-Bildplatten Aktiengesellschaft, Aeg-Telefunken, Teldec Disc recording
US4176377A (en) * 1977-11-10 1979-11-27 Eastman Kodak Company Video disc configuration
NL7802860A (nl) * 1978-03-16 1979-09-18 Philips Nv Registratiedragerlichaam en registratiedrager voor optische informatie en inrichting voor het inschrijven en uitlezen.
NL187413C (nl) * 1978-03-16 1991-09-16 Philips Nv Registratiedragerlichaam, ingeschreven registratiedrager, werkwijze voor het inschrijven van het registratiedragerlichaam en inrichting voor het uitvoeren van de werkwijze en voor het uitlezen van een ingeschreven registratiedrager.
NL7803517A (nl) * 1978-04-03 1979-10-05 Philips Nv Registratiedrager met een optisch uitleesbare fase- struktuur en inrichting voor het uitlezen.
NL7809227A (nl) * 1978-09-11 1980-03-13 Philips Nv Registratiedrager met een optisch uitleesbare, stra- lingsreflekterende informatiestruktuur.
NL7810463A (nl) * 1978-10-19 1980-04-22 Philips Nv Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur.
CA1165871A (fr) * 1978-11-08 1984-04-17 Kornelis Bulthuis Support d'enregistrement optique
NL7902363A (nl) * 1979-03-27 1980-09-30 Philips Nv Registratiedrager met een optisch uitleesbare informa- tiestruktuur.
NL7906576A (nl) * 1979-09-03 1981-03-05 Philips Nv Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor.
NL8000121A (nl) * 1980-01-09 1981-08-03 Philips Nv Schijfvormige, optische uitleesbare registratiedrager als opslagmedium voor datainformatie, inrichting voor het vervaardigen van zo'n registratiedrager, inrichting voor het optekenen van datainformatie in zo'n registratiedrager en inrichting voor het uitlezen van zo'n registratiedrager.
NL8000123A (nl) * 1980-01-09 1981-08-03 Philips Nv Inrichting voor het schrijven van digitale informatie in een schijfvormige optisch uitleesbare registratiedrager.
FR2490858B1 (fr) * 1980-09-25 1986-04-04 Rca Corp Milieu d'enregistrement optique a sensibilite variable et disque contenant de l'information, realise a l'aide d'un tel milieu
JPS57105828A (en) * 1980-12-19 1982-07-01 Matsushita Electric Ind Co Ltd Optical disk recording and reproducing system
NL8100098A (nl) * 1981-01-12 1982-08-02 Philips Nv Registratiedrager met optisch uitleesbare informatiestruktuur.
US4359750A (en) * 1981-04-30 1982-11-16 Eastman Kodak Company Optical disc structure
US4385372A (en) * 1981-05-01 1983-05-24 Drexler Technology Corporation Reflective optical data storage and laser recording media having grooved dielectric encoded prerecorded information
JPS5823333A (ja) * 1981-07-31 1983-02-12 Sharp Corp 光デイスク装置
JPS5841446A (ja) * 1981-09-04 1983-03-10 Hitachi Ltd 光学的情報追跡方式
US4494226A (en) * 1981-10-15 1985-01-15 Burroughs Corporation Three beam optical memory system
JPS58150137A (ja) * 1982-03-02 1983-09-06 Matsushita Electric Ind Co Ltd 光学情報記録再生装置
JPS58155528A (ja) * 1982-03-10 1983-09-16 Matsushita Electric Ind Co Ltd 光デイスク記録再生方式および光デイスクならびに光デイスクの製造方法
FR2523349A1 (fr) * 1982-03-12 1983-09-16 Thomson Csf Procede et dispositif optique de generation de signaux d'asservissements de la position d'une tache d'exploration des pistes d'un support d'information
JPS5911551A (ja) * 1982-07-12 1984-01-21 Toshiba Corp 光学式情報記憶媒体
EP0100995A3 (en) * 1982-08-10 1985-10-16 Kabushiki Kaisha Toshiba Optical disk
JPS5940339A (ja) * 1982-08-31 1984-03-06 Konishiroku Photo Ind Co Ltd 情報記録媒体
JPS5965951A (ja) * 1982-10-08 1984-04-14 Toshiba Corp 情報記憶媒体用原盤
JPS59101043A (ja) * 1982-11-30 1984-06-11 Matsushita Electric Ind Co Ltd 情報記録再生坦体
JPS59177744A (ja) * 1983-03-28 1984-10-08 Matsushita Electric Ind Co Ltd 記録再生用デイスク担体
JPS59207039A (ja) * 1983-05-07 1984-11-24 Kyodo Printing Co Ltd 光記録カ−ド
JPS60132616U (ja) * 1984-02-13 1985-09-04 パイオニア株式会社 記録装置
JPS60197953A (ja) * 1984-03-21 1985-10-07 Hitachi Ltd 情報記録装置
JPS60236137A (ja) * 1984-05-08 1985-11-22 Nippon Kogaku Kk <Nikon> 同時消録型光磁気記録方式並びにそれに使用する記録装置及び記録媒体

Also Published As

Publication number Publication date
NL8500153A (nl) 1986-08-18
EP0189948B1 (fr) 1990-04-04
EP0189948A1 (fr) 1986-08-06
DE3670168D1 (de) 1990-05-10
JP2603612B2 (ja) 1997-04-23
JPS61170930A (ja) 1986-08-01
US4959822A (en) 1990-09-25
CA1249659A (fr) 1989-01-31
US4893298A (en) 1990-01-09
AU584662B2 (en) 1989-06-01
AU5248486A (en) 1986-07-31

Similar Documents

Publication Publication Date Title
HK91391A (en) Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses and apparatus for forming said structure
AU578162B2 (en) Non-contact read-write unit
AU579253B2 (en) Magnetoresistive read transducer
HK71790A (en) Assembly of transducer and support therefor
EP0194640A3 (en) Information recording and reproducing apparatus
AU5864486A (en) A wetting and storage device for a catheter
GB8911756D0 (en) Reproducing and/or recording apparatus
EP0193243A3 (en) Recording and/or reproducing apparatus
EP0206072A3 (en) Acrylic polymer and a method of preparation
EP0203788A3 (en) Information recording and reproducing apparatus
AU6266186A (en) Method and apparatus for identifying the components of a signal
EP0219261A3 (en) Information recording and reproducing apparatus
AU583207B2 (en) Recording and reproducing apparatus
AU6504386A (en) Methods for diagnosis and therapy of multiple sclerosis
EP0220033A3 (en) A pcm recording and reproducing apparatus
AU573422B2 (en) Apparatus for selectively rotating a member in either of twodirections
EP0232161A3 (en) Arrangement of recording and/or reproducing apparatus
EP0196104A3 (en) Recording and/or reproducing apparatus
AU599593B2 (en) Recording disks and process
EP0227468A3 (en) Recording and/or reproducing apparatus
EP0192445A3 (en) Recording methods and recording and/or reproducing apparatus
EP0196095A3 (en) Magnetic recording and reproducing apparatus
DE3573483D1 (en) Use of a polymer for optical disks
EP0209195A3 (en) Recording and/or reproducing apparatus
GB2187878B (en) The combination of an alignment disk and a magnetic disk drive apparatus

Legal Events

Date Code Title Description
PF Patent in force
PE Patent expired

Effective date: 20060108