BE901720A - Disque a memoire lisible par voie optique. - Google Patents

Disque a memoire lisible par voie optique.

Info

Publication number
BE901720A
BE901720A BE0/214508A BE214508A BE901720A BE 901720 A BE901720 A BE 901720A BE 0/214508 A BE0/214508 A BE 0/214508A BE 214508 A BE214508 A BE 214508A BE 901720 A BE901720 A BE 901720A
Authority
BE
Belgium
Prior art keywords
readable memory
optically readable
memory disc
balancing
planar
Prior art date
Application number
BE0/214508A
Other languages
English (en)
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 BE901720A publication Critical patent/BE901720A/fr

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
    • G11B7/24018—Laminated discs
    • G11B7/24021—Laminated discs provided with a special shape or structure for centering or eccentricity prevention, e.g. alignment
    • 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
    • G11B7/24015—Air-sandwiched discs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/211—Eccentric

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Packaging For Recording Disks (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

Disque à mémoire lisible par voie optique échangeable présentant un substrat transparent plan, des faces planes et un bord extérieur circulaire, une couche d'enregistrement pouvant etre modifiée localement à l'aide d'un faisceau de rayonnement et une plaque de recouvrement qui sont fixées à quelque distance l'une de l'autre à l'aide de moyens annulaires. Les bords extérieurs des substrats sont protégés contre l'endommagement par des bords marginaux, qui sont égalementutilisés pour des buts d'équilibrage, par exemple par fixation d'une piéces d'équilibrage.
BE0/214508A 1984-02-14 1985-02-12 Disque a memoire lisible par voie optique. BE901720A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8400477A NL8400477A (nl) 1984-02-14 1984-02-14 Optisch uitleesbare geheugenschijf.

Publications (1)

Publication Number Publication Date
BE901720A true BE901720A (fr) 1985-08-12

Family

ID=19843489

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/214508A BE901720A (fr) 1984-02-14 1985-02-12 Disque a memoire lisible par voie optique.

Country Status (15)

Country Link
US (1) US4622661A (fr)
JP (1) JPS60142833U (fr)
KR (1) KR900011241Y1 (fr)
BE (1) BE901720A (fr)
CA (1) CA1241441A (fr)
DD (1) DD232781A5 (fr)
DE (1) DE3505014C2 (fr)
ES (1) ES8606711A1 (fr)
FR (1) FR2559608B1 (fr)
GB (1) GB2154362B (fr)
HK (1) HK82291A (fr)
IT (1) IT1183233B (fr)
NL (1) NL8400477A (fr)
SG (1) SG50090G (fr)
SU (1) SU1438632A3 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130870A (en) * 1990-12-21 1992-07-14 Seagate Technology, Inc. Information storage disc balance weight
US6249509B1 (en) * 1994-09-29 2001-06-19 Tdk Corporation Optical device with protective cover
JPH1040578A (ja) * 1996-07-23 1998-02-13 Mitsubishi Chem Corp ディスク用基板
AUPP231598A0 (en) * 1998-03-13 1998-04-09 Mikoh Technology Limited A method of recording information ii
EP0985207A1 (fr) * 1997-04-03 2000-03-15 Mikoh Corporation Limited Procede pour enregistrer des informations
WO1999005672A1 (fr) * 1997-07-23 1999-02-04 Seagate Technology, Inc. Systeme de lecteur de disque, procede et composants de ce dernier permettant la production d'un disque plus rigide
AU749161B2 (en) * 1998-03-13 2002-06-20 Mikoh Technology Limited Method of recording information
KR20000015452A (ko) * 1998-08-29 2000-03-15 윤종용 기울기 및 변위 보정수단을 가지는 광디스크
DE19850302A1 (de) * 1998-10-30 2000-05-04 Thomson Brandt Gmbh Ausgewuchtete Optische Disk
US6424488B1 (en) 1999-02-22 2002-07-23 Seagate Technology Llc Peripherally extending disc ring to limit disc deflection and to provide disc stack balancing
EP1043684A1 (fr) * 1999-03-29 2000-10-11 OMD Productions AG Support d'informations
AUPQ132699A0 (en) * 1999-07-01 1999-07-22 Tsun, Ka Ho Compact disc improvements
JP2002251845A (ja) * 2001-02-21 2002-09-06 Internatl Business Mach Corp <Ibm> ディスクドライブ装置、ヘッドアセンブリ、ピボットベアリング
US7227717B1 (en) * 2001-06-18 2007-06-05 Seagate Technology Llc Asymmetric disk surface properties in one head disk drives
TW200832390A (en) * 2007-01-24 2008-08-01 Daxon Technology Inc Optical disc with enforced structure
US8228626B2 (en) 2007-03-20 2012-07-24 Oerlikon Trading Ag, Trubbach Color wheel with individual balancing masses along a guide
DE102007013899B4 (de) * 2007-03-20 2024-07-11 Oerlikon Trading Ag, Trübbach Verfahren zum Auswuchten eines Farbrades mit individuellen Auswuchtmassen entlang einer Führung

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1409568A (en) * 1921-05-10 1922-03-14 Pakeman Harry Record disk for graphophones and method of forming same
FR2180562A1 (fr) * 1972-04-21 1973-11-30 Le Sausse Robert
US3838464A (en) * 1972-10-24 1974-09-24 Nashua Corp Retaining ring for magnetic disc pack assembly
US3854347A (en) * 1973-08-15 1974-12-17 J Hellerich Dynamic balancing device for a computer disc memory
DE2344744C3 (de) * 1973-08-31 1978-06-08 Ullstein Av - Produktions- Und Vertriebsgesellschaft Mbh, 2000 Hamburg Transportschutz für einen plattenförmigen Informationsträger, insbesondere Bild- oder Bild-Ton-Platte
US4074282A (en) * 1976-05-13 1978-02-14 North American Philips Corporation Radiation-sensitive record with protected sensitive surface
DE2624375C3 (de) * 1976-05-31 1979-01-04 Polygram Gmbh, 2000 Hamburg Plattenförmiger Informationsträger für Bild- bzw. Videosignale
DE2624380B1 (de) * 1976-05-31 1977-06-08 Polygram Gmbh Plattenfoermiger informationstraeger
US4313190A (en) * 1979-01-15 1982-01-26 Discovision Associates Method for making a composite video disc
JPS5621835U (fr) * 1979-07-26 1981-02-26
US4300803A (en) * 1979-09-14 1981-11-17 Plumbium Manufacturing Corporation Adhesive vehicle wheel weight and method
JPS5774842A (en) * 1980-10-24 1982-05-11 Mitsubishi Electric Corp Optical information recording disk
JPS5786173A (en) * 1980-11-17 1982-05-29 Toshiba Corp Recorder and reproducer
US4376963A (en) * 1980-12-19 1983-03-15 International Business Machines Corporation Composite magnetic recording disk
JPS647448Y2 (fr) * 1981-01-20 1989-02-28
JPS57172541A (en) * 1981-04-15 1982-10-23 Toshiba Corp Information storage medium
JPS57172542A (en) * 1981-04-15 1982-10-23 Toshiba Corp Information storage medium
US4365258A (en) * 1981-05-18 1982-12-21 Eastman Kodak Company Optical disc unit, fabrication method and cooperating write and/or read apparatus
FR2524186B1 (fr) * 1982-03-23 1989-02-24 Thomson Csf Disque optique protege comprenant un element souple de fermeture
JPS5914176A (ja) * 1982-07-15 1984-01-25 Matsushita Electric Ind Co Ltd 信号記録体
NL8300478A (nl) * 1983-02-09 1984-09-03 Philips Nv Optisch uitleesbare geheugenschijf.

Also Published As

Publication number Publication date
FR2559608A1 (fr) 1985-08-16
ES540287A0 (es) 1986-04-01
KR850009772U (ko) 1985-12-05
KR900011241Y1 (ko) 1990-12-22
SU1438632A3 (ru) 1988-11-15
DE3505014C2 (de) 1994-11-03
DE3505014A1 (de) 1985-08-14
SG50090G (en) 1990-08-31
GB2154362B (en) 1988-11-02
GB2154362A (en) 1985-09-04
NL8400477A (nl) 1985-09-02
HK82291A (en) 1991-11-01
IT8519459A0 (it) 1985-02-11
IT1183233B (it) 1987-10-15
JPH0333939Y2 (fr) 1991-07-18
CA1241441A (fr) 1988-08-30
FR2559608B1 (fr) 1988-12-09
DD232781A5 (de) 1986-02-05
GB8503679D0 (en) 1985-03-13
US4622661A (en) 1986-11-11
JPS60142833U (ja) 1985-09-21
ES8606711A1 (es) 1986-04-01

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN

Effective date: 19890228