JPH0525065Y2 - - Google Patents

Info

Publication number
JPH0525065Y2
JPH0525065Y2 JP1990095494U JP9549490U JPH0525065Y2 JP H0525065 Y2 JPH0525065 Y2 JP H0525065Y2 JP 1990095494 U JP1990095494 U JP 1990095494U JP 9549490 U JP9549490 U JP 9549490U JP H0525065 Y2 JPH0525065 Y2 JP H0525065Y2
Authority
JP
Japan
Prior art keywords
base body
optically readable
readable recording
centering
recording disk
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 - Lifetime
Application number
JP1990095494U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0345222U (en]
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])

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 JPH0345222U (en]) 1991-04-25
JPH0525065Y2 true JPH0525065Y2 (en]) 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]) 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])
EP (1) EP0118146B1 (en])
JP (2) JPS59138029U (en])
KR (1) KR840008874A (en])
CA (1) CA1211559A (en])
DE (1) DE3479359D1 (en])
ES (1) ES529481A0 (en])
HK (1) HK85891A (en])
NL (1) NL8300478A (en])
SG (1) SG84990G (en])

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
US7376073B2 (en) 2000-12-14 2008-05-20 Ecd Systems, Inc. Optical storage medium having distortion regions, and a method of modifying an optical storage medium to include distortion regions
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

Family Cites Families (15)

* 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
JPS6028041B2 (ja) * 1979-08-30 1985-07-02 パイオニア株式会社 信号記録用ディスクの製造方法
JPS5722224A (en) * 1980-07-17 1982-02-05 Ricoh Co Ltd Automatic focusing device in collapsible camera
JPS5756332U (en]) * 1980-09-17 1982-04-02
JPS5771247U (en]) * 1980-10-17 1982-04-30
JPS5788530A (en) * 1980-11-21 1982-06-02 Fujitsu Ltd Durability testing method for magnetic disc medium
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
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
FR2524186B1 (fr) * 1982-03-23 1989-02-24 Thomson Csf Disque optique protege comprenant un element souple de fermeture
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
JPH0319065Y2 (en]) 1991-04-23
DE3479359D1 (en) 1989-09-14
CA1211559A (en) 1986-09-16
HK85891A (en) 1991-11-08
EP0118146A1 (en) 1984-09-12
NL8300478A (nl) 1984-09-03
JPS59138029U (ja) 1984-09-14
EP0118146B1 (en) 1989-08-09
ES8500493A1 (es) 1984-10-01
ES529481A0 (es) 1984-10-01
US4510508A (en) 1985-04-09
SG84990G (en) 1991-01-04
JPH0345222U (en]) 1991-04-25
KR840008874A (ko) 1984-12-19

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