JPH0345222U - - Google Patents

Info

Publication number
JPH0345222U
JPH0345222U JP1990095494U JP9549490U JPH0345222U JP H0345222 U JPH0345222 U JP H0345222U JP 1990095494 U JP1990095494 U JP 1990095494U JP 9549490 U JP9549490 U JP 9549490U JP H0345222 U JPH0345222 U JP H0345222U
Authority
JP
Japan
Prior art keywords
recording disk
readable recording
centering member
optically readable
center
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.)
Granted
Application number
JP1990095494U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0525065Y2 (en:Method
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 filed Critical
Publication of JPH0345222U publication Critical patent/JPH0345222U/ja
Application granted granted Critical
Publication of JPH0525065Y2 publication Critical patent/JPH0525065Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/24015—Air-sandwiched discs
    • 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
    • G11B7/24018—Laminated discs
    • G11B7/24027—Layers; Shape, structure or physical properties thereof

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
JP1990095494U 1983-02-09 1990-09-12 Expired - Lifetime JPH0525065Y2 (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8300478A NL8300478A (nl) 1983-02-09 1983-02-09 Optisch uitleesbare geheugenschijf.

Publications (2)

Publication Number Publication Date
JPH0345222U true JPH0345222U (en:Method) 1991-04-25
JPH0525065Y2 JPH0525065Y2 (en:Method) 1993-06-24

Family

ID=19841382

Family Applications (2)

Application Number Title Priority Date Filing Date
JP1984014198U Granted JPS59138029U (ja) 1983-02-09 1984-02-06 光学的に読取可能な記録デイスク
JP1990095494U Expired - Lifetime JPH0525065Y2 (en:Method) 1983-02-09 1990-09-12

Family Applications Before (1)

Application Number Title Priority Date Filing Date
JP1984014198U Granted JPS59138029U (ja) 1983-02-09 1984-02-06 光学的に読取可能な記録デイスク

Country Status (10)

Country Link
US (1) US4510508A (en:Method)
EP (1) EP0118146B1 (en:Method)
JP (2) JPS59138029U (en:Method)
KR (1) KR840008874A (en:Method)
CA (1) CA1211559A (en:Method)
DE (1) DE3479359D1 (en:Method)
ES (1) ES8500493A1 (en:Method)
HK (1) HK85891A (en:Method)
NL (1) NL8300478A (en:Method)
SG (1) SG84990G (en:Method)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5216664A (en) * 1983-02-09 1993-06-01 U.S. Philips Corporation Optically readable disc with a centering member fixed to a transparent substrate
NL8300479A (nl) * 1983-02-09 1984-09-03 Philips Nv Optisch uitleesbare plaat.
JPS6085724U (ja) * 1983-11-17 1985-06-13 シャープ株式会社 光メモリ円板
NL8400477A (nl) * 1984-02-14 1985-09-02 Philips Nv Optisch uitleesbare geheugenschijf.
US5007040A (en) * 1984-09-22 1991-04-09 Canon Kabushiki Kaisha Magnetic recording and/or reproducing apparatus having a retaining mechanism for a disc-shaped magnetic record bearing medium
US4641152A (en) * 1986-02-24 1987-02-03 Producers Color Service, Inc. Fixturing apparatus for vibration dampened optical disc recording
US5293370A (en) * 1991-01-16 1994-03-08 Del Mar Avionics Method and apparatus for creating optical disc masters
JPH0680550B2 (ja) * 1991-06-05 1994-10-12 ソニー株式会社 情報ディスク用ターンテーブル
JPH0554436A (ja) * 1991-08-20 1993-03-05 Pioneer Electron Corp 光記録媒体
US5427520A (en) * 1992-01-31 1995-06-27 Sony Corporation Mold device for fabricating disc substrate
US5787069A (en) * 1996-09-13 1998-07-28 Digital Armor Inc. Protective cover for an optical disc
US6424488B1 (en) 1999-02-22 2002-07-23 Seagate Technology Llc Peripherally extending disc ring to limit disc deflection and to provide disc stack balancing
US6317402B1 (en) * 1999-11-23 2001-11-13 Behavior Tech Computer Corporation Disk tray of optic disk drive having pressure balance device
AU2001297777C1 (en) 2000-12-14 2008-11-06 Sca Ipla Holdings, Inc. Systems and methods for optical media modification
US7562396B2 (en) * 2001-08-21 2009-07-14 Ecd Systems, Inc. Systems and methods for media authentication
US7643393B2 (en) * 2001-12-12 2010-01-05 Ecd Systems, Inc. Systems and methods for optical media modification
US7716485B2 (en) * 2002-02-01 2010-05-11 Sca Ipla Holdings Inc. Systems and methods for media authentication

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5637802A (en) * 1979-08-30 1981-04-11 Pioneer Electronic Corp Manufacture of disk for signal recording
JPS5722224A (en) * 1980-07-17 1982-02-05 Ricoh Co Ltd Automatic focusing device in collapsible camera
JPS5756332U (en:Method) * 1980-09-17 1982-04-02
JPS5788530A (en) * 1980-11-21 1982-06-02 Fujitsu Ltd Durability testing method for magnetic disc medium
JPS57113466A (en) * 1981-09-18 1982-07-14 Sony Corp Magnetic sheet jacket
JPS57203272A (en) * 1981-06-10 1982-12-13 Hitachi Ltd Disc locating mechanism
JPS5914199A (ja) * 1982-07-13 1984-01-25 Sony Corp 文字図形情報システムの端末装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1766046A (en) * 1929-01-07 1930-06-24 Fed Telegraph Co Sound-reproducing system
US3815146A (en) * 1973-04-09 1974-06-04 Teletype Corp Record-turntable assembly and method of making
JPS5496002A (en) * 1978-01-13 1979-07-30 Hitachi Ltd Information recording plate
FR2437668A1 (fr) * 1978-09-29 1980-04-25 Thomson Csf Disque optique protege
JPS5771247U (en:Method) * 1980-10-17 1982-04-30
US4365257A (en) * 1981-03-05 1982-12-21 Minnesota Mining And Manufacturing Company Stretched-film optical recording disc
US4365258A (en) * 1981-05-18 1982-12-21 Eastman Kodak Company Optical disc unit, fabrication method and cooperating write and/or read apparatus
FR2524186B1 (fr) * 1982-03-23 1989-02-24 Thomson Csf Disque optique protege comprenant un element souple de fermeture

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5637802A (en) * 1979-08-30 1981-04-11 Pioneer Electronic Corp Manufacture of disk for signal recording
JPS5722224A (en) * 1980-07-17 1982-02-05 Ricoh Co Ltd Automatic focusing device in collapsible camera
JPS5756332U (en:Method) * 1980-09-17 1982-04-02
JPS5788530A (en) * 1980-11-21 1982-06-02 Fujitsu Ltd Durability testing method for magnetic disc medium
JPS57203272A (en) * 1981-06-10 1982-12-13 Hitachi Ltd Disc locating mechanism
JPS57113466A (en) * 1981-09-18 1982-07-14 Sony Corp Magnetic sheet jacket
JPS5914199A (ja) * 1982-07-13 1984-01-25 Sony Corp 文字図形情報システムの端末装置

Also Published As

Publication number Publication date
HK85891A (en) 1991-11-08
KR840008874A (ko) 1984-12-19
JPH0525065Y2 (en:Method) 1993-06-24
ES529481A0 (es) 1984-10-01
NL8300478A (nl) 1984-09-03
JPH0319065Y2 (en:Method) 1991-04-23
SG84990G (en) 1991-01-04
CA1211559A (en) 1986-09-16
ES8500493A1 (es) 1984-10-01
JPS59138029U (ja) 1984-09-14
EP0118146A1 (en) 1984-09-12
EP0118146B1 (en) 1989-08-09
US4510508A (en) 1985-04-09
DE3479359D1 (en) 1989-09-14

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