BR8902391A - Processo de varredura otica de um plano de informacao meio de gravacao otico e aparelho de varredura - Google Patents

Processo de varredura otica de um plano de informacao meio de gravacao otico e aparelho de varredura

Info

Publication number
BR8902391A
BR8902391A BR898902391A BR8902391A BR8902391A BR 8902391 A BR8902391 A BR 8902391A BR 898902391 A BR898902391 A BR 898902391A BR 8902391 A BR8902391 A BR 8902391A BR 8902391 A BR8902391 A BR 8902391A
Authority
BR
Brazil
Prior art keywords
optical
scan
appliance
plan means
optical recording
Prior art date
Application number
BR898902391A
Other languages
English (en)
Inventor
Johannes Hendrikus Mari Spruit
Gijsbertus Bouwhuis
Antonius Hendricus Ma Holtslag
Cornelis Marinus Johanne Uijen
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 BR8902391A publication Critical patent/BR8902391A/pt

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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • 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
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • G11B11/10593—Details for improving read-out properties, e.g. polarisation of light
    • 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
    • G11B11/10502—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 characterised by the transducing operation to be executed
    • G11B11/10515—Reproducing
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
    • G11B11/10578—Servo format, e.g. prepits, 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • 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
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Light Guides In General And Applications Therefor (AREA)
BR898902391A 1988-05-24 1989-05-24 Processo de varredura otica de um plano de informacao meio de gravacao otico e aparelho de varredura BR8902391A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8801327A NL8801327A (nl) 1988-05-24 1988-05-24 Methode voor het optisch aftasten van een informatievlak en optische registratiedragers en aftastinrichtingen geschikt voor toepassing van de methode.

Publications (1)

Publication Number Publication Date
BR8902391A true BR8902391A (pt) 1990-01-16

Family

ID=19852341

Family Applications (1)

Application Number Title Priority Date Filing Date
BR898902391A BR8902391A (pt) 1988-05-24 1989-05-24 Processo de varredura otica de um plano de informacao meio de gravacao otico e aparelho de varredura

Country Status (14)

Country Link
US (1) US5153873A (pt)
EP (1) EP0343727B1 (pt)
JP (1) JP2732297B2 (pt)
KR (1) KR0163023B1 (pt)
CN (1) CN1038963C (pt)
AT (1) ATE118918T1 (pt)
AU (1) AU622449B2 (pt)
BR (1) BR8902391A (pt)
CA (1) CA1322791C (pt)
DE (1) DE68921244T2 (pt)
ES (1) ES2069573T3 (pt)
HK (1) HK62396A (pt)
NL (1) NL8801327A (pt)
YU (1) YU47316B (pt)

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01236483A (ja) * 1988-03-16 1989-09-21 Sanyo Electric Co Ltd 信号トラック捕捉装置
US5247510A (en) * 1990-06-29 1993-09-21 Digital Equipment Corporation Increasing storage density of optical data media by detecting a selected portion of a light spot image corresponding to a single domain
JP2910250B2 (ja) * 1990-12-27 1999-06-23 ソニー株式会社 光磁気記録媒体
US5241520A (en) * 1990-12-28 1993-08-31 Sony Corporation System and method of reproducing signals recorded on a magneto-optic recording medium
JPH04255947A (ja) * 1991-02-08 1992-09-10 Sony Corp 光磁気記録方法と光磁気記録再生装置
JP3111479B2 (ja) * 1991-02-08 2000-11-20 ソニー株式会社 光磁気記録媒体
FR2676853B1 (fr) * 1991-05-21 1993-12-03 Thomson Csf Procede d'ecriture et de lecture optique sur support d'informations a stockage haute densite.
US5233621A (en) * 1991-06-27 1993-08-03 Intellectual Property Development Associates Of Connecticut, Inc. Second harmonic generation and self frequency doubling laser materials comprised of bulk germanosilicate and aluminosilicate glasses
JPH0528498A (ja) * 1991-07-19 1993-02-05 Ricoh Co Ltd 光照射方法並びに光学的情報記録媒体及びそれを用いた記録方法と再生方法
US5315573A (en) * 1991-08-08 1994-05-24 Hitachi, Ltd. Non-linear optical saturable absorber layer in an optical disk to discriminate wavelength above or below a threshold level of intensity
US5420846A (en) * 1991-08-08 1995-05-30 Hitachi, Ltd. Recording medium having a plurality of nonlinear transmission characteristics
US5493628A (en) * 1991-10-17 1996-02-20 Lawandy; Nabil M. High density optically encoded information storage using second harmonic generation in silicate glasses
JPH05266478A (ja) * 1992-03-18 1993-10-15 Sharp Corp 光メモリ素子及びそれを用いた再生方法
JPH0628713A (ja) * 1992-07-13 1994-02-04 Pioneer Electron Corp 光ディスク
US6665235B2 (en) 1992-11-06 2003-12-16 Sharp Kabushiki Kaisha Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium
DE69332846T2 (de) 1992-11-06 2003-12-24 Sharp K.K., Osaka Magnetooptischer Aufzeichnungsträger und Verfahren zur Aufzeichnung und Wiedergabe und für den magnetooptischen Aufzeichnungsträger ausgebildetes optische Kopf
JP3006645B2 (ja) * 1992-12-25 2000-02-07 日本ビクター株式会社 光ディスク装置
JP2857002B2 (ja) * 1993-01-07 1999-02-10 シャープ株式会社 光磁気記憶装置
US5474874A (en) * 1993-02-16 1995-12-12 Sony Corporation Optical recording medium
US5392272A (en) * 1993-03-29 1995-02-21 Sri International Single erasable optical recording layer having both retention and expansion characteristics
EP1020854A3 (en) * 1993-04-02 2000-12-20 Canon Kabushiki Kaisha Magneto-optical reproducing apparatus
US5709978A (en) * 1993-06-18 1998-01-20 Hitachi, Ltd. Supperresolution readout thin film and information recording medium
JP2664327B2 (ja) * 1993-06-21 1997-10-15 富士通株式会社 光学的ヘッド及び光学的記録再生方法
US6408129B1 (en) * 1993-10-29 2002-06-18 Time Warner Entertainment Co, Lp Method for processing a plurality of synchronized audio tracks, including phase inversion of a selected track
JP2827924B2 (ja) * 1993-11-11 1998-11-25 日本ビクター株式会社 光記録媒体及びその製造方法
JPH07141687A (ja) * 1993-11-17 1995-06-02 Pioneer Video Corp 光学装置
JP3566743B2 (ja) * 1993-12-13 2004-09-15 Ｔｄｋ株式会社 光記録媒体
US5529864A (en) * 1993-12-16 1996-06-25 Canon Kabushiki Kaisha Optical recording medium having mask layer
DE69424532T2 (de) * 1993-12-23 2001-01-18 Thomson-Csf, Paris Verfahren und optisches system zur aufzeichnung/wiedergabe von information auf einem aufzeichnungsmedium
FR2722605B1 (fr) * 1994-07-13 1996-08-14 Thomson Csf Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement
FR2714511B1 (fr) * 1993-12-23 1996-01-26 Thomson Csf Procédé et système optiques d'inscription/lecture d'informations sur un support d'enregistrement.
US5631056A (en) * 1994-03-31 1997-05-20 Victor Company Of Japan, Ltd. Optical recording medium
JP3506491B2 (ja) * 1994-06-23 2004-03-15 Ｔｄｋ株式会社 光情報媒体
US6903347B2 (en) 1994-07-15 2005-06-07 Stephen C. Baer Superresolution in microlithography and fluorescence microscopy
US5866911A (en) * 1994-07-15 1999-02-02 Baer; Stephen C. Method and apparatus for improving resolution in scanned optical system
US7071477B2 (en) * 1994-07-15 2006-07-04 Baer Stephen C Superresolution in microlithography and fluorescence microscopy
US6259104B1 (en) 1994-07-15 2001-07-10 Stephen C. Baer Superresolution in optical microscopy and microlithography
US5952668A (en) * 1994-07-15 1999-09-14 Baer; Stephen C. Resolution in microscopy and microlithography
US5818811A (en) * 1994-09-08 1998-10-06 Canon Kabushiki Kaisha Information recording and reproducing method for recording information on and reproducing information from an optical recording medium including a land portion divided into a plurality of information tracks
JPH08203142A (ja) 1994-09-08 1996-08-09 Canon Inc 光記録媒体、光情報記録再生方法及び光情報記録再生装置
DE69523260T2 (de) * 1994-11-15 2002-04-18 Nec Corp., Tokio/Tokyo Optischer Kopf unter Verwendung der Hyperauflösungstechnik
US7050329B2 (en) * 1995-04-21 2006-05-23 Johnson Mark B Magnetic spin based memory with inductive write lines
US5708648A (en) * 1995-05-31 1998-01-13 Nec Corporation Optical head apparatus including light focusing and refocusing lens systems
US5701286A (en) * 1996-04-04 1997-12-23 Nec Corporation Super-resolution optical head device which produces side spots without side lobes
FR2765716B1 (fr) * 1997-07-02 1999-07-30 Commissariat Energie Atomique Support d'enregistrement optique a deux niveaux superposes, dispositif d'enregistrement et procede de lecture correspondants
JPH11273148A (ja) * 1998-03-20 1999-10-08 Toshiba Corp 光ディスクおよびその記録再生方法
US6379767B1 (en) 1998-04-28 2002-04-30 Lg Electronics Inc. Optical recording medium with multiple recording layers and fabricating method thereof
JP4145446B2 (ja) 1998-12-09 2008-09-03 Ｔｄｋ株式会社 光記録媒体の使用方法
JP2000229479A (ja) 1998-12-09 2000-08-22 Tdk Corp 光記録媒体
KR100338756B1 (ko) * 1999-07-20 2002-05-30 윤종용 상변화 광디스크
JP2001235678A (ja) * 2000-02-23 2001-08-31 Sony Corp 対物レンズ、光学ピックアップ装置及び光ディスク装置
US6483801B1 (en) * 2000-07-31 2002-11-19 Terastor Corporation Optical storage devices without mass transfer and spots
KR100415048B1 (ko) * 2001-06-29 2004-01-13 한국과학기술연구원 고밀도 광 정보저장 매체
JP4234013B2 (ja) * 2001-12-14 2009-03-04 パナソニック株式会社 光情報再生方法、光ヘッド装置、および光情報処理装置
CA2445028A1 (en) * 2002-02-21 2003-09-04 Johnson & Johnson Vision Care, Inc. Dual inspection of ophthalmic lenses
US7554898B2 (en) * 2002-02-26 2009-06-30 Dphi Acquisitions, Inc. Dual density disc with associated properties
WO2004102543A2 (en) * 2003-05-19 2004-11-25 Koninklijke Philips Electronics N.V. Record carrier for the optical storage and retrieval of information
DE102005034441A1 (de) * 2005-07-22 2007-02-22 Carl Zeiss Microimaging Gmbh Mikroskopobjektiv
DE102005034442A1 (de) * 2005-07-22 2007-02-22 Carl Zeiss Microimaging Gmbh Mikroskopobjektivsystem
EP1933312A1 (en) * 2006-12-15 2008-06-18 Deutsche Thomson OHG Optical storage medium and respective apparatus for recording and/or reading data
FR2912539B1 (fr) * 2007-02-09 2009-03-27 Commissariat Energie Atomique Support de stockage d'informations optiques a haute resolution
FR2914775B1 (fr) * 2007-04-06 2009-05-15 Commissariat Energie Atomique Support d'enregistrement optique en super-resolution
FR2915617B1 (fr) * 2007-04-27 2009-06-12 Commissariat Energie Atomique Procede de lecture d'informations optiques en super-resolution.
FR2928486B1 (fr) * 2008-03-07 2011-08-19 Commissariat Energie Atomique Structure de stockage optique a haute densite
EP2180470A1 (en) * 2008-10-24 2010-04-28 Thomson Licensing Apparatus with a pickup for reading data from or writing data to an optical storage medium
EP2407970A1 (en) * 2010-07-15 2012-01-18 Thomson Licensing Super-RENS optical recording medium

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5266405A (en) * 1975-11-29 1977-06-01 Victor Co Of Japan Ltd Optical recording system of information recording discs
NL7805069A (nl) * 1978-05-11 1979-11-13 Philips Nv Inrichting voor puntsgewijze aftasting van een infor- matievlak.
US4414650A (en) * 1980-06-23 1983-11-08 Sharp Kabushiki Kaisha Magneto-optic memory element
NL8104946A (nl) * 1981-11-02 1983-06-01 Philips Nv Inrichting voor het uitlezen en/of inschrijven van een optisch uitleesbare informatiestructuur op een registratiedrager.
US4719615A (en) * 1983-08-22 1988-01-12 Optical Data, Inc. Erasable optical data storage medium
FR2553002B1 (fr) * 1983-10-06 1992-03-27 Centre Nat Rech Scient Procede perfectionne d'obtention de liposomes unilamellaires de diametres eleves, leur application pharmacologique pour l'encapsulage d'un principe actif en vue de son administration extemporanee et dispositif correspondant
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
JPH0695404B2 (ja) * 1985-12-27 1994-11-24 ソニー株式会社 光磁気記録方法
US4818666A (en) * 1986-03-28 1989-04-04 U.S. Philips Corporation Erasable optical recording element and method of optically recording and erasing information
JPS6381632A (ja) * 1986-09-25 1988-04-12 Fujitsu Ltd 光デイスクの記録方法
JPS63155436A (ja) * 1986-12-19 1988-06-28 Toshiba Corp 情報記録再生消去方法
JPH01184641A (ja) * 1988-01-11 1989-07-24 Fuji Photo Film Co Ltd 情報記録媒体
US4965784A (en) * 1988-05-31 1990-10-23 Sandia Corporation Method and apparatus for bistable optical information storage for erasable optical disks

Also Published As

Publication number Publication date
YU107489A (sh) 1992-07-20
CN1039319A (zh) 1990-01-31
US5153873A (en) 1992-10-06
AU3508489A (en) 1989-11-30
ES2069573T3 (es) 1995-05-16
HK62396A (en) 1996-04-19
JP2732297B2 (ja) 1998-03-25
DE68921244D1 (de) 1995-03-30
NL8801327A (nl) 1989-12-18
EP0343727B1 (en) 1995-02-22
CA1322791C (en) 1993-10-05
KR0163023B1 (ko) 1999-01-15
AU622449B2 (en) 1992-04-09
DE68921244T2 (de) 1995-09-07
CN1038963C (zh) 1998-07-01
KR890017670A (ko) 1989-12-16
JPH0296926A (ja) 1990-04-09
ATE118918T1 (de) 1995-03-15
YU47316B (sh) 1995-01-31
EP0343727A1 (en) 1989-11-29

Similar Documents

Publication Publication Date Title
BR8902391A (pt) Processo de varredura otica de um plano de informacao meio de gravacao otico e aparelho de varredura
EP0741383A3 (en) Optical information recording medium
ATE193781T1 (de) Vorrichtung zum optischen abtasten eines auzeichnungsmediums
MX155195A (es) Mejoras en aparato de grabacion que utiliza medios de radiacion luminosa
EP0375298A3 (en) Optical information recording media
EP0333165A3 (en) System and method for managing recording areas on writable type optical disk
EP0346844A3 (en) Optical head apparatus
GR3035975T3 (en) Identity card with a visible authenticating mark and a process for manufacturing the same.
MY107081A (en) Optical recording medium.
NL7811086A (en) Information recording element - comprising support sheet carrying radiation-hardened varnish layer and information recording layer
JPS5794906A (en) Optical magnetic recorder
DE3888296D1 (de) Optisches Informationsaufzeichnungs- und -löschverfahren.
DE3884420D1 (de) Laseroptisches schreib- und leseverfahren.
EP0381211A3 (en) Optical recording media
DE3466820D1 (en) Record carrier in which information can be written and which can be read by optical means
EP0387047A3 (en) Magneto-optical recording apparatus
ES285581U (es) Un disco legible opticamente
MY125818A (en) Optical scanning device and optical apparatus for reading and/or writing information in an information plane provided with such a device
DE69131855D1 (de) Aufzeichnungs-/Wiedergabesystem für eine magneto-optische Platte
AU545917B2 (en) Optical recording medium and method for its formation
FR2653247B1 (fr) Procede et dispositif d&#39;ecriture et de lecture d&#39;informations a partir d&#39;un support a base de materiau ferroelectrique.
MY132760A (en) Device for recording and/or reproducing information
JPS6433752A (en) Optical disk device
DE59702361D1 (de) Vorrichtung zur ablenkung von lichtstrahlen
JPS6427995A (en) Optical information recording medium