IT1183232B - OPTICALLY READABLE MEMORY DISC - Google Patents

OPTICALLY READABLE MEMORY DISC

Info

Publication number
IT1183232B
IT1183232B IT19458/85A IT1945885A IT1183232B IT 1183232 B IT1183232 B IT 1183232B IT 19458/85 A IT19458/85 A IT 19458/85A IT 1945885 A IT1945885 A IT 1945885A IT 1183232 B IT1183232 B IT 1183232B
Authority
IT
Italy
Prior art keywords
readable memory
optically readable
memory disc
disc
optically
Prior art date
Application number
IT19458/85A
Other languages
Italian (it)
Other versions
IT8519458A0 (en
Inventor
Leonardus Petrus Joh Hoogeveen
Hendrikus Wilhelmus Co Peeters
Alcysius Michael Josep Spruijt
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 IT8519458A0 publication Critical patent/IT8519458A0/en
Application granted granted Critical
Publication of IT1183232B publication Critical patent/IT1183232B/en

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
IT19458/85A 1984-02-14 1985-02-11 OPTICALLY READABLE MEMORY DISC IT1183232B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8400476A NL8400476A (en) 1984-02-14 1984-02-14 OPTICALLY READABLE MEMORY DRIVE.

Publications (2)

Publication Number Publication Date
IT8519458A0 IT8519458A0 (en) 1985-02-11
IT1183232B true IT1183232B (en) 1987-10-15

Family

ID=19843488

Family Applications (1)

Application Number Title Priority Date Filing Date
IT19458/85A IT1183232B (en) 1984-02-14 1985-02-11 OPTICALLY READABLE MEMORY DISC

Country Status (11)

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

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
DE190908C (en) *
DE203656C (en) *
GB335768A (en) * 1929-10-24 1930-10-02 Jacoviac Maurice Improvements in protecting devices for gramophone disc records
DE883811C (en) * 1951-06-08 1953-07-20 Hermann Geiselhart Ring made of rubber as plate protection
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
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
FR2528216B1 (en) * 1982-06-08 1988-01-08 Thomson Csf PROTECTED OPTICAL DISC WITH FREE LAYER
JPS5987636A (en) * 1982-11-10 1984-05-21 Toshiba Corp Information storage medium

Also Published As

Publication number Publication date
GB2155684A (en) 1985-09-25
FR2559607A1 (en) 1985-08-16
CA1241744A (en) 1988-09-06
IT8519458A0 (en) 1985-02-11
ES8606710A1 (en) 1986-04-01
SU1487826A3 (en) 1989-06-15
BE901719A (en) 1985-08-12
JPS60140235U (en) 1985-09-17
ES540285A0 (en) 1986-04-01
DE3505015A1 (en) 1985-08-14
GB8503678D0 (en) 1985-03-13
NL8400476A (en) 1985-09-02
DD228381A5 (en) 1985-10-09
GB2155684B (en) 1988-11-02

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