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SE8900879D0 - OPTICAL OR MAGNETO-OPTICAL DATA SYSTEM - Google Patents

OPTICAL OR MAGNETO-OPTICAL DATA SYSTEM

Info

Publication number
SE8900879D0
SE8900879D0 SE8900879A SE8900879A SE8900879D0 SE 8900879 D0 SE8900879 D0 SE 8900879D0 SE 8900879 A SE8900879 A SE 8900879A SE 8900879 A SE8900879 A SE 8900879A SE 8900879 D0 SE8900879 D0 SE 8900879D0
Authority
SE
Sweden
Prior art keywords
optical
media
head
magneto
disc
Prior art date
Application number
SE8900879A
Other languages
Swedish (sv)
Other versions
SE8900879L (en
Inventor
S W Farnsworth
Original Assignee
Bernoulli Optical Systems
Ici Plc
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 Bernoulli Optical Systems, Ici Plc filed Critical Bernoulli Optical Systems
Publication of SE8900879D0 publication Critical patent/SE8900879D0/en
Publication of SE8900879L publication Critical patent/SE8900879L/en

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)

Abstract

A read/write storage system for reading/writing data to and from a flexible optical or magneto-optical media (disc or tape eg helically scanned by rotating drum) includes an optical read/write head and a fine movement stabilizer 64 positioned proximate the flexible media for stabilizing the flexible media in a desired position so that the optical head providing focussed light need not be moved substantially toward or away from the media in order to maintain the light focussed on the media. A record disc may be additionally stabilised by Bernouilli plate 66 as part of cartridge (12) (eg Fig 1) or attached to drive 10. Magnetic head (170) below the media and plate (166) may provide stabilisation (Fig 11); coupler (164) surrounding lens (156) may also be shaped for stabilisation. Geometrics of stabilizer (64) and magnetic head (170) are detailed W.r.t. (Figs 5 and 12). The magneto-optical assembly of (Fig 13) includes U-shaped magnetic element (180) and the optical head on the same side of the disc. Alternative head assemblies are detailed (Figs 7, 8, 9). Optical information storage systems are disclosed (eg. Fig 1) including spicule member (28) guiding cartridge (12) and motor (34) for moving arm (30) (with the head assembly). <IMAGE>
SE8900879A 1988-03-14 1989-03-13 OPTICAL OR MAGNETO-OPTICAL DATA SYSTEMS SE8900879L (en)

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
SE8900879D0 true SE8900879D0 (en) 1989-03-13
SE8900879L SE8900879L (en) 1989-09-15

Family

ID=26863354

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8900879A SE8900879L (en) 1988-03-14 1989-03-13 OPTICAL OR MAGNETO-OPTICAL DATA SYSTEMS

Country Status (12)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08315462A (en) * 1995-05-22 1996-11-29 Sony Corp Magnetic head device, tape cartridge and recording/ reproducing device
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 (en) * 1972-01-11 1973-08-24 Thomson Csf
NL169668C (en) * 1972-09-02 1982-08-02 Philips Nv DEVICE FOR READING A DISC-SHAPED DATA CARRIER.
US3912282A (en) * 1972-11-17 1975-10-14 Matsushita Electric Ind Co Ltd Recording and reproducing apparatus using flexible recording media
NL7316384A (en) * 1973-11-29 1975-06-02 Philips Nv DEVICE FOR OPTICAL READING OF A REFECTING REGISTRATION CARRIER.
US3927252A (en) * 1974-04-02 1975-12-16 Zenith Radio Corp Biased video disc stabilizer system
FR2312832A1 (en) * 1975-05-30 1976-12-24 Thomson Brandt STABILIZATION DEVICE FOR SOFT DISCS, AND IN PARTICULAR VIDEO-DISCS, AND READING APPARATUS SUITABLE FOR THIS DEVICE
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 (en) * 1983-01-25 1987-11-06 Bull Sa OPTICAL FOCUSING DEVICE FOR READING A INFORMATION MEDIUM RUNNING BEFORE IT
US4610009A (en) * 1983-05-23 1986-09-02 Xerox Corporation Writing, erasing and readout system for a magneto-optic recording medium
JPS6053863A (en) * 1983-09-05 1985-03-27 Sony Corp Apparatus for detecting magnetizing direction of magnetic recording medium
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
WO1985002933A1 (en) * 1983-12-27 1985-07-04 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 (en) * 1985-03-20 1986-09-24 Hitachi Ltd magneto-optical disk device
US4843600A (en) * 1985-09-13 1989-06-27 Canon Kabushiki Kaisha Recording head for magneto-optical information recording apparatus
JPS6282525A (en) * 1985-10-08 1987-04-16 Toshiba Corp Optical head
EP0219124B1 (en) * 1985-10-16 1993-04-14 Sharp Kabushiki Kaisha Beam controller for magneto-optical disc memory system
JPS62204456A (en) * 1986-03-03 1987-09-09 Nippon Telegr & Teleph Corp <Ntt> Optical disk device
JPS62223841A (en) * 1986-03-26 1987-10-01 Hitachi Ltd magnetic recording/reproducing converter
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JP2575120B2 (en) * 1986-07-31 1997-01-22 ソニー株式会社 Magneto-optical recording device
JPH0778916B2 (en) * 1986-10-17 1995-08-23 キヤノン株式会社 Magneto-optical information reproducing device

Also Published As

Publication number Publication date
IL89579A0 (en) 1989-09-10
GB2216710B (en) 1992-09-02
NL8900611A (en) 1989-10-02
ES2013115A6 (en) 1990-04-16
GB8905108D0 (en) 1989-04-19
FR2628565B1 (en) 1996-05-15
DE3908150A1 (en) 1989-11-30
FI891202A0 (en) 1989-03-14
FR2628565A1 (en) 1989-09-15
SE8900879L (en) 1989-09-15
BR8901169A (en) 1989-10-31
GB2216710A (en) 1989-10-11
JPH0210568A (en) 1990-01-16
NO891075D0 (en) 1989-03-13
KR890015281A (en) 1989-10-28
FI891202A (en) 1989-09-15
NO891075L (en) 1989-09-15

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Effective date: 19920907