FR2569072B1 - MAGNETO-OPTICAL READING SYSTEM - Google Patents

MAGNETO-OPTICAL READING SYSTEM

Info

Publication number
FR2569072B1
FR2569072B1 FR8408252A FR8408252A FR2569072B1 FR 2569072 B1 FR2569072 B1 FR 2569072B1 FR 8408252 A FR8408252 A FR 8408252A FR 8408252 A FR8408252 A FR 8408252A FR 2569072 B1 FR2569072 B1 FR 2569072B1
Authority
FR
France
Prior art keywords
magneto
reading system
optical reading
optical
reading
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
Application number
FR8408252A
Other languages
French (fr)
Other versions
FR2569072A1 (en
Inventor
Jean-Paul Castera
Jean-Claude Lehureau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR8408252A priority Critical patent/FR2569072B1/en
Publication of FR2569072A1 publication Critical patent/FR2569072A1/en
Application granted granted Critical
Publication of FR2569072B1 publication Critical patent/FR2569072B1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record 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
    • G11B11/10502—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 characterised by the transducing operation to be executed
    • G11B11/10515—Reproducing
    • 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
    • G11B11/10547—Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR8408252A 1984-05-25 1984-05-25 MAGNETO-OPTICAL READING SYSTEM Expired FR2569072B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8408252A FR2569072B1 (en) 1984-05-25 1984-05-25 MAGNETO-OPTICAL READING SYSTEM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8408252A FR2569072B1 (en) 1984-05-25 1984-05-25 MAGNETO-OPTICAL READING SYSTEM

Publications (2)

Publication Number Publication Date
FR2569072A1 FR2569072A1 (en) 1986-02-14
FR2569072B1 true FR2569072B1 (en) 1988-09-16

Family

ID=9304415

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8408252A Expired FR2569072B1 (en) 1984-05-25 1984-05-25 MAGNETO-OPTICAL READING SYSTEM

Country Status (1)

Country Link
FR (1) FR2569072B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4822675A (en) * 1987-01-14 1989-04-18 Minnesota Mining And Manufacturing Company Stable magneto optic recording medium
FR2634051B1 (en) * 1988-07-05 1995-02-24 Thomson Csf MAGNETIC MATERIAL DEVICE WITH ANTI-WEAR LAYER AND APPLICATIONS TO A RECORDING-READING HEAD AND A RECORDING DISC
FR2728716B1 (en) * 1994-12-23 1997-01-31 Thomson Csf READING DEVICE AND SYSTEM
DE19811102A1 (en) * 1998-03-13 1999-09-16 Thomson Brandt Gmbh Magnetic tape device for reading and writing data from and to a magnetic tape enables data to be read at a tape speed faster than the normal reproduction speed
US5920538A (en) * 1998-06-11 1999-07-06 Tandberg Data Asa Magneto-optical readout method and magneto-optical readout head and method for making same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959784A (en) * 1974-12-23 1976-05-25 Actron High speed optical read-out of data stored in an array
DE2552694A1 (en) * 1975-11-25 1977-06-02 Witec Wissenschaftlich Tech Be Photographic film recording of digital data - using LED's for recording and photo diodes for read out
US4198701A (en) * 1978-05-23 1980-04-15 Harris Corporation of Cleveland, Ohio Digital optical recorder-reproducer system
US4345279A (en) * 1979-10-16 1982-08-17 Olympus Optical Co., Ltd. Time base correction apparatus
JPS5744241A (en) * 1980-08-27 1982-03-12 Matsushita Electric Ind Co Ltd Magnetooptic reproducer
JPS5835708A (en) * 1981-08-26 1983-03-02 Fujitsu Ltd Reproducer for recording information
GB2120000B (en) * 1982-04-28 1986-04-09 Tdk Corp Magnetic recording and reproduction

Also Published As

Publication number Publication date
FR2569072A1 (en) 1986-02-14

Similar Documents

Publication Publication Date Title
AT380355B (en) INFORMATION SYSTEM
DE3273674D1 (en) Optical memory system providing improved track following
FR2574859B1 (en) POST-COMBUSTION SYSTEM
KR880700219A (en) Clein Luum Construction System
KR880701945A (en) Magneto-optical recorder
DK163262C (en) EXTENDED COOLING SYSTEM
DE3587009D1 (en) TRANSLATION SYSTEM.
IL75267A (en) Data correlation system
DK459185A (en) CLOSED BLOOD POSTING SYSTEM
DE3577247D1 (en) MAGNETO-OPTICAL RECORD CARRIER.
DE3567983D1 (en) Magneto-optical recording system
DK152830C (en) ELECTROMEDIC SYSTEM
DE3682217D1 (en) RECORDING SYSTEM.
DE3588191T2 (en) Magneto-optical playback device
DE3588174D1 (en) Video system
DE3585937D1 (en) TRANSLATION SYSTEM.
FR2560354B1 (en) PROJECTOR SYSTEM
GB2110459B (en) Magneto-optical recording system
BR8503595A (en) TAPE MINISTRATOR
FR2569072B1 (en) MAGNETO-OPTICAL READING SYSTEM
FR2561157B1 (en) RAZOR SYSTEM
NO862489D0 (en) DIVIDED CHANNEL ACCESS SYSTEM.
FR2562575B3 (en) HIGHWAY TRACKING SYSTEM
AT379834B (en) TRACK SOFT
DK82386D0 (en) UNDERWATER MANAGEMENT SYSTEM

Legal Events

Date Code Title Description
CD Change of name or company name