GB2155684B - Optically readable storage disc - Google Patents

Optically readable storage disc

Info

Publication number
GB2155684B
GB2155684B GB08503678A GB8503678A GB2155684B GB 2155684 B GB2155684 B GB 2155684B GB 08503678 A GB08503678 A GB 08503678A GB 8503678 A GB8503678 A GB 8503678A GB 2155684 B GB2155684 B GB 2155684B
Authority
GB
United Kingdom
Prior art keywords
readable storage
optically readable
storage disc
disc
optically
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.)
Expired
Application number
GB08503678A
Other languages
English (en)
Other versions
GB2155684A (en
GB8503678D0 (en
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 GB8503678D0 publication Critical patent/GB8503678D0/en
Publication of GB2155684A publication Critical patent/GB2155684A/en
Application granted granted Critical
Publication of GB2155684B publication Critical patent/GB2155684B/en
Expired 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
GB08503678A 1984-02-14 1985-02-13 Optically readable storage disc Expired GB2155684B (en)

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
GB8503678D0 GB8503678D0 (en) 1985-03-13
GB2155684A GB2155684A (en) 1985-09-25
GB2155684B true GB2155684B (en) 1988-11-02

Family

ID=19843488

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08503678A Expired GB2155684B (en) 1984-02-14 1985-02-13 Optically readable storage disc

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

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE203656C (it) *
DE190908C (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
US4331966A (en) * 1980-10-06 1982-05-25 Storage Technology Corporation Information storage device and method of forming same
JPS5774842A (en) * 1980-10-24 1982-05-11 Mitsubishi Electric Corp Optical information recording disk
US4376963A (en) * 1980-12-19 1983-03-15 International Business Machines Corporation Composite magnetic recording disk
JPS57150155A (en) * 1981-03-09 1982-09-16 Matsushita Electric Ind Co Ltd Magnetooptic disc
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
FR2528216B1 (fr) * 1982-06-08 1988-01-08 Thomson Csf Disque optique protege a porte-couche libre
JPS5987636A (ja) * 1982-11-10 1984-05-21 Toshiba Corp 情報記憶媒体

Also Published As

Publication number Publication date
IT1183232B (it) 1987-10-15
DE3505015A1 (de) 1985-08-14
ES540285A0 (es) 1986-04-01
CA1241744A (en) 1988-09-06
FR2559607A1 (fr) 1985-08-16
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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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee