FR2559607A1 - Disque a memoire lisible par voie optique - Google Patents

Disque a memoire lisible par voie optique Download PDF

Info

Publication number
FR2559607A1
FR2559607A1 FR8501934A FR8501934A FR2559607A1 FR 2559607 A1 FR2559607 A1 FR 2559607A1 FR 8501934 A FR8501934 A FR 8501934A FR 8501934 A FR8501934 A FR 8501934A FR 2559607 A1 FR2559607 A1 FR 2559607A1
Authority
FR
France
Prior art keywords
substrate
memory disk
marginal
outer edge
cover plate
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.)
Pending
Application number
FR8501934A
Other languages
English (en)
French (fr)
Inventor
Leonardus Petrus Joh Hoogeveen
Hendrikus Wilhelmus Co Peeters
Aloysius Michael Josep Spruijt
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 FR2559607A1 publication Critical patent/FR2559607A1/fr
Pending legal-status Critical Current

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
    • G11B7/24097—Structures for detection, control, recording operation or replay operation; Special shapes or structures for centering or eccentricity prevention; Arrangements for testing, inspecting or evaluating; Containers, cartridges or cassettes
    • 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

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Packaging For Recording Disks (AREA)
FR8501934A 1984-02-14 1985-02-12 Disque a memoire lisible par voie optique Pending FR2559607A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8400476A NL8400476A (nl) 1984-02-14 1984-02-14 Optisch uitleesbare geheugenschijf.

Publications (1)

Publication Number Publication Date
FR2559607A1 true FR2559607A1 (fr) 1985-08-16

Family

ID=19843488

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8501934A Pending FR2559607A1 (fr) 1984-02-14 1985-02-12 Disque a memoire lisible par voie optique

Country Status (11)

Country Link
JP (1) JPS60140235U (it)
BE (1) BE901719A (it)
CA (1) CA1241744A (it)
DD (1) DD228381A5 (it)
DE (1) DE3505015A1 (it)
ES (1) ES8606710A1 (it)
FR (1) FR2559607A1 (it)
GB (1) GB2155684B (it)
IT (1) IT1183232B (it)
NL (1) NL8400476A (it)
SU (1) SU1487826A3 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343784B (en) * 1998-11-16 2001-08-01 Leung Ching Yuen Irregular optical disc
US20020136155A1 (en) * 2001-03-06 2002-09-26 Chieh-Ho Chen CD safe to hold

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE190908C (it) *
DE203656C (it) *
GB335768A (en) * 1929-10-24 1930-10-02 Jacoviac Maurice Improvements in protecting devices for gramophone disc records
DE883811C (de) * 1951-06-08 1953-07-20 Hermann Geiselhart Ring aus Gummi als Plattenschutz
JPS5774842A (en) * 1980-10-24 1982-05-11 Mitsubishi Electric Corp Optical information recording disk
JPS57150155A (en) * 1981-03-09 1982-09-16 Matsushita Electric Ind Co Ltd Magnetooptic disc
JPS57172542A (en) * 1981-04-15 1982-10-23 Toshiba Corp Information storage medium
JPS57172541A (en) * 1981-04-15 1982-10-23 Toshiba Corp Information storage medium
EP0096623A1 (fr) * 1982-06-08 1983-12-21 Thomson-Csf Disque optique protégé à porte-couche libre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331966A (en) * 1980-10-06 1982-05-25 Storage Technology Corporation Information storage device and method of forming same
US4376963A (en) * 1980-12-19 1983-03-15 International Business Machines Corporation Composite magnetic recording disk
JPS5987636A (ja) * 1982-11-10 1984-05-21 Toshiba Corp 情報記憶媒体

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE190908C (it) *
DE203656C (it) *
GB335768A (en) * 1929-10-24 1930-10-02 Jacoviac Maurice Improvements in protecting devices for gramophone disc records
DE883811C (de) * 1951-06-08 1953-07-20 Hermann Geiselhart Ring aus Gummi als Plattenschutz
JPS5774842A (en) * 1980-10-24 1982-05-11 Mitsubishi Electric Corp Optical information recording disk
JPS57150155A (en) * 1981-03-09 1982-09-16 Matsushita Electric Ind Co Ltd Magnetooptic disc
JPS57172542A (en) * 1981-04-15 1982-10-23 Toshiba Corp Information storage medium
JPS57172541A (en) * 1981-04-15 1982-10-23 Toshiba Corp Information storage medium
EP0096623A1 (fr) * 1982-06-08 1983-12-21 Thomson-Csf Disque optique protégé à porte-couche libre

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 156 (P-135)[1034], 17 août 1982; & JP-A-57 74 842 (MITSUBISHI DENKI K.K.) 11-05-1982 *
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 255 (P-162)[1133], 14 décembre 1982; & JP-A-57 150 155 (MATSUSHITA DENKI SANGYO K.K.) 16-09-1982 *
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 18 (P-170)[1163], 25 janvier 1983; & JP-A-57 172 541 (TOKYO SHIBAURA DENKI K.K.) 23-10-1982 *
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 18 (P-170)[1163], 25 janvier 1983; & JP-A-57 172 542 (TOKYO SHIBAURA DENKI K.K.) 23-10-1982 *
PROCEEDINGS OF SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING, OPTICAL STORAGE MEDIA, Arlington, Virginia, 6-10 juin 1983, vol. 420, pages 18-21, Bellingham, US; C.J.M. ROOIJMANS et al.: "Characteristics of the optical media laboratory disk" *

Also Published As

Publication number Publication date
IT1183232B (it) 1987-10-15
DE3505015A1 (de) 1985-08-14
ES540285A0 (es) 1986-04-01
GB2155684B (en) 1988-11-02
CA1241744A (en) 1988-09-06
BE901719A (fr) 1985-08-12
DD228381A5 (de) 1985-10-09
GB2155684A (en) 1985-09-25
IT8519458A0 (it) 1985-02-11
ES8606710A1 (es) 1986-04-01
GB8503678D0 (en) 1985-03-13
JPS60140235U (ja) 1985-09-17
NL8400476A (nl) 1985-09-02
SU1487826A3 (ru) 1989-06-15

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