SG84990G - Optically readable storage disc - Google Patents

Optically readable storage disc

Info

Publication number
SG84990G
SG84990G SG849/90A SG84990A SG84990G SG 84990 G SG84990 G SG 84990G SG 849/90 A SG849/90 A SG 849/90A SG 84990 A SG84990 A SG 84990A SG 84990 G SG84990 G SG 84990G
Authority
SG
Singapore
Prior art keywords
readable storage
optically readable
storage disc
disc
optically
Prior art date
Application number
SG849/90A
Other languages
English (en)
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 SG84990G publication Critical patent/SG84990G/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
    • G11B7/24015—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
SG849/90A 1983-02-09 1990-10-24 Optically readable storage disc SG84990G (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 (1)

Publication Number Publication Date
SG84990G true SG84990G (en) 1991-01-04

Family

ID=19841382

Family Applications (1)

Application Number Title Priority Date Filing Date
SG849/90A SG84990G (en) 1983-02-09 1990-10-24 Optically readable storage disc

Country Status (10)

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

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 (16)

* 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
JPS53130156A (en) * 1977-04-21 1978-11-13 Iseki Agricult Mach Grainnbag holder
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 (es) * 1980-09-17 1982-04-02
JPS5771247U (es) * 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
JPH0525065Y2 (es) 1993-06-24
ES529481A0 (es) 1984-10-01
NL8300478A (nl) 1984-09-03
EP0118146B1 (en) 1989-08-09
DE3479359D1 (en) 1989-09-14
EP0118146A1 (en) 1984-09-12
JPS59138029U (ja) 1984-09-14
KR840008874A (ko) 1984-12-19
JPH0319065Y2 (es) 1991-04-23
US4510508A (en) 1985-04-09
CA1211559A (en) 1986-09-16
HK85891A (en) 1991-11-08
ES8500493A1 (es) 1984-10-01
JPH0345222U (es) 1991-04-25

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