JPS5444180B2 - - Google Patents

Info

Publication number
JPS5444180B2
JPS5444180B2 JP1708474A JP1708474A JPS5444180B2 JP S5444180 B2 JPS5444180 B2 JP S5444180B2 JP 1708474 A JP1708474 A JP 1708474A JP 1708474 A JP1708474 A JP 1708474A JP S5444180 B2 JPS5444180 B2 JP S5444180B2
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
Application number
JP1708474A
Other versions
JPS49114330A (ja
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 JPS49114330A publication Critical patent/JPS49114330A/ja
Publication of JPS5444180B2 publication Critical patent/JPS5444180B2/ja
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
    • G11B23/40—Identifying or analogous means applied to or incorporated in the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. label, leader, photograph
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G11B7/0903—Multi-beam tracking systems
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • G11C13/06—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using magneto-optical elements

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Optical Recording Or Reproduction (AREA)
JP1708474A 1973-02-12 1974-02-12 Expired JPS5444180B2 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7301929A NL7301929A (ja) 1973-02-12 1973-02-12

Publications (2)

Publication Number Publication Date
JPS49114330A JPS49114330A (ja) 1974-10-31
JPS5444180B2 true JPS5444180B2 (ja) 1979-12-24

Family

ID=19818183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1708474A Expired JPS5444180B2 (ja) 1973-02-12 1974-02-12

Country Status (9)

Country Link
US (1) US3899780A (ja)
JP (1) JPS5444180B2 (ja)
BE (1) BE810857A (ja)
CA (1) CA1017056A (ja)
DE (1) DE2403093A1 (ja)
FR (1) FR2217770B1 (ja)
GB (1) GB1450966A (ja)
NL (1) NL7301929A (ja)
SE (1) SE397599B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003991A1 (en) * 1983-03-31 1984-10-11 Sony Corp Thermomagnetic optical recording method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061892B1 (en) * 1981-03-26 1988-06-22 Sony Corporation Thermomagnetic recording methods
US4558383A (en) * 1983-06-30 1985-12-10 International Business Machines Corporation Information storage disk transducer position control system using a prerecorded servo pattern requiring no alignment with the storage disk
US4893910A (en) * 1988-03-16 1990-01-16 Hewlett-Packard Company Magneto-optical recording system having medium with domainless control layer
US5208706A (en) * 1988-10-24 1993-05-04 Lemelson Jerome H Magnetic reproduction apparatus and method
US6118632A (en) * 1997-02-12 2000-09-12 International Business Machines Corporation Magnetic disk stack having laser-bump identifiers on magnetic disks
US6278419B1 (en) 1997-06-26 2001-08-21 Light Spin Ltd. Moving display

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631415A (en) * 1969-09-12 1971-12-28 Honeywell Inc Optical mass memory
US3742471A (en) * 1971-02-24 1973-06-26 Hitachi Ltd Bubble domain apparatus
US3731290A (en) * 1971-07-15 1973-05-01 Honeywell Inc Optical mass memory
US3810131A (en) * 1972-07-18 1974-05-07 Bell Telephone Labor Inc Devices employing the interaction of laser light with magnetic domains

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN#N11=1971 *
IEEE TRANSACTION ON MAGNETICS=1971 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003991A1 (en) * 1983-03-31 1984-10-11 Sony Corp Thermomagnetic optical recording method

Also Published As

Publication number Publication date
FR2217770A1 (ja) 1974-09-06
GB1450966A (en) 1976-09-29
JPS49114330A (ja) 1974-10-31
CA1017056A (en) 1977-09-06
FR2217770B1 (ja) 1981-09-04
DE2403093A1 (de) 1974-08-15
NL7301929A (ja) 1974-08-14
US3899780A (en) 1975-08-12
BE810857A (fr) 1974-08-12
SE397599B (sv) 1977-11-07

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