FR2514913B1 - Dispositif opto-electronique de lecture d'informations contenues sur un support magnetique - Google Patents

Dispositif opto-electronique de lecture d'informations contenues sur un support magnetique

Info

Publication number
FR2514913B1
FR2514913B1 FR8119543A FR8119543A FR2514913B1 FR 2514913 B1 FR2514913 B1 FR 2514913B1 FR 8119543 A FR8119543 A FR 8119543A FR 8119543 A FR8119543 A FR 8119543A FR 2514913 B1 FR2514913 B1 FR 2514913B1
Authority
FR
France
Prior art keywords
opto
electronic device
information contained
reading information
magnetic medium
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
FR8119543A
Other languages
English (en)
French (fr)
Other versions
FR2514913A1 (fr
Inventor
Jean-Pierre Lazzari
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.)
Bull SAS
Original Assignee
Bull SAS
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 Bull SAS filed Critical Bull SAS
Priority to FR8119543A priority Critical patent/FR2514913B1/fr
Priority to DE8282400594T priority patent/DE3276398D1/de
Priority to EP82400594A priority patent/EP0077693B1/fr
Priority to US06/417,904 priority patent/US4510544A/en
Priority to JP57161535A priority patent/JPS5873031A/ja
Publication of FR2514913A1 publication Critical patent/FR2514913A1/fr
Application granted granted Critical
Publication of FR2514913B1 publication Critical patent/FR2514913B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
FR8119543A 1981-10-16 1981-10-16 Dispositif opto-electronique de lecture d'informations contenues sur un support magnetique Expired FR2514913B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR8119543A FR2514913B1 (fr) 1981-10-16 1981-10-16 Dispositif opto-electronique de lecture d'informations contenues sur un support magnetique
DE8282400594T DE3276398D1 (en) 1981-10-16 1982-03-31 Optoelectronic device for reproducing information carried on a magnetic record carrier
EP82400594A EP0077693B1 (fr) 1981-10-16 1982-03-31 Dispositif opto-électronique de lecture d'informations contenues sur un support magnétique
US06/417,904 US4510544A (en) 1981-10-16 1982-09-14 Optoelectronic device for reading data contained on a magnetic medium
JP57161535A JPS5873031A (ja) 1981-10-16 1982-09-16 光デイスク情報読出装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8119543A FR2514913B1 (fr) 1981-10-16 1981-10-16 Dispositif opto-electronique de lecture d'informations contenues sur un support magnetique

Publications (2)

Publication Number Publication Date
FR2514913A1 FR2514913A1 (fr) 1983-04-22
FR2514913B1 true FR2514913B1 (fr) 1986-07-04

Family

ID=9263134

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8119543A Expired FR2514913B1 (fr) 1981-10-16 1981-10-16 Dispositif opto-electronique de lecture d'informations contenues sur un support magnetique

Country Status (5)

Country Link
US (1) US4510544A (enExample)
EP (1) EP0077693B1 (enExample)
JP (1) JPS5873031A (enExample)
DE (1) DE3276398D1 (enExample)
FR (1) FR2514913B1 (enExample)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526987B1 (fr) * 1982-05-14 1987-07-03 Bull Sa Procede opto-electronique de lecture d'informations contenues sur un support magnetique et circuit pour le mettre en oeuvre
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
US4638383A (en) * 1984-02-22 1987-01-20 Mcginlay James G Micro hard-disk drive system
JPS61160845A (ja) * 1985-01-09 1986-07-21 Nippon Kogaku Kk <Nikon> 光デイスクの記録再生装置
FR2601465B1 (fr) * 1986-07-11 1988-10-21 Bull Sa Dispositif modulateur haute frequence de polarisation de la lumiere
FR2609201B1 (fr) * 1986-12-30 1989-10-27 Bull Sa Tete d'ecriture magnetique et de lecture optique d'un support d'informations
FR2615995A1 (fr) * 1987-05-27 1988-12-02 Bull Sa Mode d'ecriture d'informations sur un support d'enregistrement magnetique
FR2621411B1 (fr) 1987-10-05 1989-12-08 Bull Sa Dispositif asservi de lecture optique et d'ecriture magnetique d'un support d'informations
JP3350072B2 (ja) * 1991-11-12 2002-11-25 パイオニア株式会社 ピックアップ装置
US5940549A (en) * 1996-07-30 1999-08-17 Seagate Technology, Incorporated Optical system and method using optical fibers for storage and retrieval of information
US6034938A (en) * 1996-07-30 2000-03-07 Seagate Technology, Inc. Data storage system having an optical processing flying head
US6850475B1 (en) 1996-07-30 2005-02-01 Seagate Technology, Llc Single frequency laser source for optical data storage system
US5850375A (en) * 1996-07-30 1998-12-15 Seagate Technology, Inc. System and method using optical fibers in a data storage and retrieval system
US6574015B1 (en) 1998-05-19 2003-06-03 Seagate Technology Llc Optical depolarizer
US6275349B1 (en) * 1998-12-02 2001-08-14 Storage Technology Corporation Integrated optical tracking system for magnetic media

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158846A (en) * 1961-01-23 1964-11-24 Silverman Daniel Information retrieval systems
US3769465A (en) * 1969-08-18 1973-10-30 Ibm Electronic servo in magnetic recording readout
FR2057678A5 (enExample) * 1969-08-18 1971-05-21 Ibm
US3662364A (en) * 1969-12-22 1972-05-09 Ibm Scan control for synchronizing a data signal with a clock signal
FR2098502A5 (enExample) * 1970-06-10 1972-03-10 Cii
DE2033557B2 (de) * 1970-07-07 1978-03-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt System zur Speicherung und Wieder gäbe von Daten
GB1316917A (en) * 1970-12-21 1973-05-16 Ibm Magneto-optic transducers
DE2108837C3 (de) * 1971-02-25 1973-11-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur Abtastung von Signalen längs mindestens einer Spur
US3737236A (en) * 1972-01-03 1973-06-05 Corning Glass Works Magnetooptic readout system utilizing optical waveguide fibers
US3739154A (en) * 1972-05-01 1973-06-12 Ampex Optical tracking apparatus for read out of high density recording
CA947867A (en) * 1972-05-16 1974-05-21 H. Keith Eastwood Computer memory device
FR2260833A1 (en) * 1974-02-13 1975-09-05 Proc Opto Electro Exploit Optical reader for linear recording - projects image onto scanning photodiode array to form segments
BE831264A (fr) * 1975-07-11 1975-11-03 Systeme de lecture d'informations sur disque
WO1980001016A1 (fr) * 1978-11-01 1980-05-15 Hitachi Ltd Dispositif de detection d'anisotropie magneto-optique
JPS55142424A (en) * 1979-04-18 1980-11-07 Ibm Sensor for optical data memory

Also Published As

Publication number Publication date
JPS5873031A (ja) 1983-05-02
EP0077693B1 (fr) 1987-05-20
EP0077693A1 (fr) 1983-04-27
DE3276398D1 (en) 1987-06-25
US4510544A (en) 1985-04-09
FR2514913A1 (fr) 1983-04-22
JPH038024B2 (enExample) 1991-02-05

Similar Documents

Publication Publication Date Title
FR2535097B1 (fr) Dispositif d&#39;ecriture d&#39;informations sur un support magnetique
BE879426A (fr) Dispositif optique pour la lecture de l&#39;information d&#39;un porteur d&#39;information en forme de disque
FR2542487B1 (fr) Dispositif de lecture d&#39;un support d&#39;information en forme de disque a codage optique
BE878327A (fr) Dispositif pour la lecture d&#39;un porteur d&#39;information en forme de disque
FR2509891B1 (fr) Dispositif optique d&#39;enregistrement-lecture sur support d&#39;information pregrave
BE895655A (fr) Dispositif de lecture d&#39;un support d&#39;information en forme de disque
FR2481501B1 (fr) Porteur d&#39;enregistrement comportant une structure d&#39;information lisible par voie optique et dispositif pour la lecture d&#39;un tel porteur d&#39;enregistrement
FR2539883B1 (fr) Dispositif optique de focalisation pour la lecture d&#39;un support d&#39;informations defilant devant lui
FR2483664B1 (fr) Dispositif optique d&#39;enregistrement-lecture sur un support d&#39;informations et systeme de memoire optique comprenant un tel dispositif
BE886992A (fr) Porteur d&#39;information, dispositif pour sa fabrication et dispositif pour l&#39;enregistrement et la lecture
FR2385172B1 (fr) Dispositif pour la lecture d&#39;un porteur d&#39;enregistrement reflechissant le rayonnement
BE880545A (fr) Dispositif pour lire par voie optique l&#39;information d&#39;un porteur d&#39;information en forme d&#39;un disque
FR2420183B1 (fr) Corps porteur d&#39;enregistrement et porteur d&#39;enregistrement pour de l&#39;information optique et dispositif d&#39;enregistrement et de lecture
FR2534722B1 (fr) Dispositif servant a la lecture et/ou l&#39;enregistrement d&#39;information par voie optique
FR2540272B1 (fr) Dispositif de lecture d&#39;un support d&#39;information optique
FR2339928A1 (fr) Dispositif pour la lecture d&#39;un porteur d&#39;enregistrement presentant une structure d&#39;information lisible par voie optique
FR2514913B1 (fr) Dispositif opto-electronique de lecture d&#39;informations contenues sur un support magnetique
FR2536197B1 (fr) Support d&#39;enregistrement d&#39;informations
FR2506982B1 (fr) Dispositif pour l&#39;enregistrement et/ou la lecture d&#39;un support d&#39;information
FR2508217B1 (fr) Dispositif et procede d&#39;enregistrement d&#39;informations sur un disque
FR2505074B1 (fr) Dispositif a disque d&#39;enregistrement de donnees
BE891649A (fr) Dispositif de positionnement et de verrouillage pour disques porteurs d&#39;informations.
BE895139A (fr) Dispositif pour l&#39;exploration optique d&#39;un support d&#39;information en forme de disque
FR2557722B1 (fr) Procede d&#39;ecriture d&#39;informations sur un support d&#39;enregistrement
BE895140A (fr) Dispositif pour l&#39;exploration optique d&#39;un support d&#39;information en forme de disque

Legal Events

Date Code Title Description
ST Notification of lapse