BE901719A - Disque a memoire lisible par voie optique. - Google Patents

Disque a memoire lisible par voie optique.

Info

Publication number: BE901719A
Authority: BE; Belgium
Prior art keywords: memory disc; readable memory; optically readable; recording layer; outer edges
Prior art date: 1984-02-14

Application number

BE0/214507A

Other languages

English (en)

French (fr)

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.)

1984-02-14

Filing date

1985-02-12

Publication date

1985-08-12

1985-02-12 Application filed by Philips Nv filed Critical Philips Nv

1985-08-12 Publication of BE901719A publication Critical patent/BE901719A/fr

Links

239000000758 substrate Substances 0.000 abstract 3
230000001681 protective effect Effects 0.000 abstract 1

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)

BE0/214507A 1984-02-14 1985-02-12 Disque a memoire lisible par voie optique. BE901719A (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
BE901719A true BE901719A (fr)	1985-08-12

Family

ID=19843488

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE0/214507A BE901719A (fr)	1984-02-14	1985-02-12	Disque a memoire lisible par voie optique.

Country Status (11)

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

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 (de) *
DE190908C (de) *
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
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 (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

1984
- 1984-02-14 NL NL8400476A patent/NL8400476A/nl not_active Application Discontinuation
1985
- 1985-02-07 CA CA000473768A patent/CA1241744A/en not_active Expired
- 1985-02-11 ES ES540285A patent/ES8606710A1/es not_active Expired
- 1985-02-11 IT IT19458/85A patent/IT1183232B/it active
- 1985-02-12 DD DD85273212A patent/DD228381A5/de unknown
- 1985-02-12 BE BE0/214507A patent/BE901719A/fr not_active IP Right Cessation
- 1985-02-12 FR FR8501934A patent/FR2559607A1/fr active Pending
- 1985-02-13 GB GB08503678A patent/GB2155684B/en not_active Expired
- 1985-02-13 JP JP1985017893U patent/JPS60140235U/ja active Pending
- 1985-02-13 SU SU853862706A patent/SU1487826A3/ru active
- 1985-02-14 DE DE19853505015 patent/DE3505015A1/de not_active Withdrawn

Also Published As

Publication number	Publication date
IT1183232B (it)	1987-10-15
IT8519458A0 (it)	1985-02-11
CA1241744A (en)	1988-09-06
FR2559607A1 (fr)	1985-08-16
GB2155684B (en)	1988-11-02
ES8606710A1 (es)	1986-04-01
GB2155684A (en)	1985-09-25
SU1487826A3 (ru)	1989-06-15
NL8400476A (nl)	1985-09-02
DD228381A5 (de)	1985-10-09
DE3505015A1 (de)	1985-08-14
ES540285A0 (es)	1986-04-01
JPS60140235U (ja)	1985-09-17
GB8503678D0 (en)	1985-03-13

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Legal Events

Date

Code

Title

Description

1989-08-31

RE

Patent lapsed

Owner name: N.V. PHILIPS'GLOEILAMPENFABRIEKEN

Effective date: 19890228