FI891202A0 - Optiskt eller magnetooptiskt datasystem. - Google Patents

Optiskt eller magnetooptiskt datasystem.

Info

Publication number
FI891202A0
FI891202A0 FI891202A FI891202A FI891202A0 FI 891202 A0 FI891202 A0 FI 891202A0 FI 891202 A FI891202 A FI 891202A FI 891202 A FI891202 A FI 891202A FI 891202 A0 FI891202 A0 FI 891202A0
Authority
FI
Finland
Prior art keywords
magnetooptiskt
optiskt
datasystem
eller
optiskt eller
Prior art date
Application number
FI891202A
Other languages
English (en)
Other versions
FI891202A (fi
Inventor
Stephen W Farnsworth
David R Dodds
Slobodan Robert Perera
K John Stahl
Original Assignee
Ici Plc
Bernoulli Optical Systems
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
Priority claimed from US07/167,652 external-priority patent/US5012463A/en
Application filed by Ici Plc, Bernoulli Optical Systems filed Critical Ici Plc
Publication of FI891202A0 publication Critical patent/FI891202A0/fi
Publication of FI891202A publication Critical patent/FI891202A/fi

Links

Classifications

    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/32—Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G11B11/10536—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using thermic beams, e.g. lasers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10552—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base
    • G11B11/10554—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base the transducers being disposed on the same side of the carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/1058—Flying heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60—Guiding record carrier
    • G11B15/62—Maintaining desired spacing between record carrier and head
    • G11B15/64—Maintaining desired spacing between record carrier and head by fluid-dynamic spacing
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
    • G11B7/0031—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent using a rotating head, e.g. helicoidal recording
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with 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
    • G11B7/08—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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
FI891202A 1988-03-14 1989-03-14 Optiskt eller magnetooptiskt datasystem. FI891202A (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16765988A 1988-03-14 1988-03-14
US07/167,652 US5012463A (en) 1988-03-14 1988-03-14 Optical read/write storage system for flexible media having bernoulli stabilization at the optical head

Publications (2)

Publication Number Publication Date
FI891202A0 true FI891202A0 (fi) 1989-03-14
FI891202A FI891202A (fi) 1989-09-15

Family

ID=26863354

Family Applications (1)

Application Number Title Priority Date Filing Date
FI891202A FI891202A (fi) 1988-03-14 1989-03-14 Optiskt eller magnetooptiskt datasystem.

Country Status (12)

Country Link
JP (1) JPH0210568A (fi)
KR (1) KR890015281A (fi)
BR (1) BR8901169A (fi)
DE (1) DE3908150A1 (fi)
ES (1) ES2013115A6 (fi)
FI (1) FI891202A (fi)
FR (1) FR2628565B1 (fi)
GB (1) GB2216710B (fi)
IL (1) IL89579A0 (fi)
NL (1) NL8900611A (fi)
NO (1) NO891075L (fi)
SE (1) SE8900879L (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08315462A (ja) * 1995-05-22 1996-11-29 Sony Corp 磁気ヘッド装置、テープカートリッジ及び記録再生装置
SG101448A1 (en) * 2001-05-08 2004-01-30 Sony Electronics Singapore Pte A disk drive
US7164629B2 (en) 2002-01-22 2007-01-16 Ricoh Company, Ltd. Method of controlling an optical disk apparatus

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2167258A5 (fi) * 1972-01-11 1973-08-24 Thomson Csf
NL169668C (nl) * 1972-09-02 1982-08-02 Philips Nv Inrichting voor het uitlezen van een schijfvormige informatiedrager.
US3912282A (en) * 1972-11-17 1975-10-14 Matsushita Electric Ind Co Ltd Recording and reproducing apparatus using flexible recording media
NL7316384A (nl) * 1973-11-29 1975-06-02 Philips Nv Inrichting voor het optisch uitlezen van een reflekterende registratiedrager.
US3927252A (en) * 1974-04-02 1975-12-16 Zenith Radio Corp Biased video disc stabilizer system
FR2312832A1 (fr) * 1975-05-30 1976-12-24 Thomson Brandt Dispositif de stabilisation de disques souples, et notamment de video-disques, et appareil de lecture adapte a ce dispositif
US4030815A (en) * 1975-10-31 1977-06-21 Rca Corporation Hydrostatic bearing apparatus
GB1569667A (en) * 1977-09-30 1980-06-18 Ibm Record/playback heat structure and data storage apparatus therefor
US4316278A (en) * 1979-12-13 1982-02-16 Mcdonnell Douglas Corporation System for reading or recording indicia on a flexible disc
JPS5756807A (en) * 1980-09-24 1982-04-05 Canon Inc Thin film waveguide type head
FR2539883B1 (fr) * 1983-01-25 1987-11-06 Bull Sa Dispositif optique de focalisation pour la lecture d'un support d'informations defilant devant lui
US4610009A (en) * 1983-05-23 1986-09-02 Xerox Corporation Writing, erasing and readout system for a magneto-optic recording medium
JPS6053863A (ja) * 1983-09-05 1985-03-27 Sony Corp 磁気記録媒体の磁化方向検出装置
EP0146656B1 (en) * 1983-12-21 1987-11-11 International Business Machines Corporation A disk cartridge having a flexible disk storage medium and a disk file including such a cartridge
EP0167570A1 (en) * 1983-12-27 1986-01-15 Ncr Corporation Magnetic record medium and apparatus and method for tracking the same
US4661875A (en) * 1985-01-24 1987-04-28 Victor Company Of Japan, Ltd. Information storage disc assembly
JPS61214256A (ja) * 1985-03-20 1986-09-24 Hitachi Ltd 光磁気デイスク装置
US4843600A (en) * 1985-09-13 1989-06-27 Canon Kabushiki Kaisha Recording head for magneto-optical information recording apparatus
JPS6282525A (ja) * 1985-10-08 1987-04-16 Toshiba Corp 光学ヘツド
EP0219124B1 (en) * 1985-10-16 1993-04-14 Sharp Kabushiki Kaisha Beam controller for magneto-optical disc memory system
JPS62204456A (ja) * 1986-03-03 1987-09-09 Nippon Telegr & Teleph Corp <Ntt> 光デイスク装置
JPS62223841A (ja) * 1986-03-26 1987-10-01 Hitachi Ltd 磁気記録再生変換器
US4740851A (en) * 1986-04-21 1988-04-26 Iomega Corporation Disk drive with spicule member
AU600280B2 (en) * 1986-07-02 1990-08-09 Sony Corporation Apparatus for optically recording and reproducing information in record tracks on a rotatable record disc
JP2575120B2 (ja) * 1986-07-31 1997-01-22 ソニー株式会社 光磁気記録装置
JPH0778916B2 (ja) * 1986-10-17 1995-08-23 キヤノン株式会社 光磁気情報再生装置

Also Published As

Publication number Publication date
SE8900879L (sv) 1989-09-15
DE3908150A1 (de) 1989-11-30
ES2013115A6 (es) 1990-04-16
SE8900879D0 (sv) 1989-03-13
IL89579A0 (en) 1989-09-10
BR8901169A (pt) 1989-10-31
FR2628565B1 (fr) 1996-05-15
NL8900611A (nl) 1989-10-02
GB2216710A (en) 1989-10-11
NO891075L (no) 1989-09-15
JPH0210568A (ja) 1990-01-16
GB2216710B (en) 1992-09-02
GB8905108D0 (en) 1989-04-19
NO891075D0 (no) 1989-03-13
KR890015281A (ko) 1989-10-28
FI891202A (fi) 1989-09-15
FR2628565A1 (fr) 1989-09-15

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: BERNOULLI OPTICAL SYSTEMS COMPANY

Owner name: IMPERIAL CHEMICAL INDUSTRIES PLC