JPH041414B2 - - Google Patents

Info

Publication number
JPH041414B2
JPH041414B2 JP55188746A JP18874680A JPH041414B2 JP H041414 B2 JPH041414 B2 JP H041414B2 JP 55188746 A JP55188746 A JP 55188746A JP 18874680 A JP18874680 A JP 18874680A JP H041414 B2 JPH041414 B2 JP H041414B2
Authority
JP
Japan
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 - Lifetime
Application number
JP55188746A
Other versions
JPS57109138A (en
Inventor
Takao Hiuga
Original Assignee
Sharp Kk
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 Sharp Kk filed Critical Sharp Kk
Priority to JP55188746A priority Critical patent/JPH041414B2/ja
Publication of JPS57109138A publication Critical patent/JPS57109138A/en
Publication of JPH041414B2 publication Critical patent/JPH041414B2/ja
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2531Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising glass
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/258Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
    • G11B7/2585Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on aluminium
JP55188746A 1980-12-25 1980-12-25 Expired - Lifetime JPH041414B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55188746A JPH041414B2 (en) 1980-12-25 1980-12-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55188746A JPH041414B2 (en) 1980-12-25 1980-12-25

Publications (2)

Publication Number Publication Date
JPS57109138A JPS57109138A (en) 1982-07-07
JPH041414B2 true JPH041414B2 (en) 1992-01-13

Family

ID=16229041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55188746A Expired - Lifetime JPH041414B2 (en) 1980-12-25 1980-12-25

Country Status (1)

Country Link
JP (1) JPH041414B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8300960A (en) * 1983-03-17 1984-10-16 Philips Nv Optical disk regi station.
JP2002251786A (en) * 2001-02-22 2002-09-06 Sony Corp Optical recording medium and its manufacture

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114263A (en) * 1974-07-26 1976-02-04 Hitachi Ltd Setsugono roeiboshiho
JPS5231703A (en) * 1975-09-05 1977-03-10 Kokusai Denshin Denwa Co Ltd <Kdd> Magnetic thin film recording medium
JPS5348528A (en) * 1976-09-24 1978-05-02 Thomson Brandt Information carrier for effecting optical recording and reading and method of manufacturing the same
JPS56105344A (en) * 1980-01-25 1981-08-21 Fuji Photo Film Co Ltd Photomagnetic recording medium

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56156144U (en) * 1980-04-21 1981-11-21

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114263A (en) * 1974-07-26 1976-02-04 Hitachi Ltd Setsugono roeiboshiho
JPS5231703A (en) * 1975-09-05 1977-03-10 Kokusai Denshin Denwa Co Ltd <Kdd> Magnetic thin film recording medium
JPS5348528A (en) * 1976-09-24 1978-05-02 Thomson Brandt Information carrier for effecting optical recording and reading and method of manufacturing the same
JPS56105344A (en) * 1980-01-25 1981-08-21 Fuji Photo Film Co Ltd Photomagnetic recording medium

Also Published As

Publication number Publication date
JPS57109138A (en) 1982-07-07

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