FR2339928B1 - - Google Patents

Info

Publication number
FR2339928B1
FR2339928B1 FR7702258A FR7702258A FR2339928B1 FR 2339928 B1 FR2339928 B1 FR 2339928B1 FR 7702258 A FR7702258 A FR 7702258A FR 7702258 A FR7702258 A FR 7702258A FR 2339928 B1 FR2339928 B1 FR 2339928B1
Authority
FR
France
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
FR7702258A
Other languages
French (fr)
Other versions
FR2339928A1 (fr
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2339928A1 publication Critical patent/FR2339928A1/fr
Application granted granted Critical
Publication of FR2339928B1 publication Critical patent/FR2339928B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G11B7/0906—Differential phase difference systems
    • 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
    • G11B11/1053—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 to compensate for the magnetic domain drift or time shift
    • 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
    • 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
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
    • 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
    • G11B7/0946—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 specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/7605—Television signal recording on discs or drums

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Holo Graphy (AREA)
FR7702258A 1976-01-28 1977-01-27 Dispositif pour la lecture d'un porteur d'enregistrement presentant une structure d'information lisible par voie optique Granted FR2339928A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7600842,A NL182258C (nl) 1976-01-28 1976-01-28 Inrichting voor het uitlezen van een vlakke registratiedrager met een optisch uitleesbare informatiestructuur.

Publications (2)

Publication Number Publication Date
FR2339928A1 FR2339928A1 (fr) 1977-08-26
FR2339928B1 true FR2339928B1 (ja) 1980-03-21

Family

ID=19825526

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7702258A Granted FR2339928A1 (fr) 1976-01-28 1977-01-27 Dispositif pour la lecture d'un porteur d'enregistrement presentant une structure d'information lisible par voie optique

Country Status (21)

Country Link
JP (1) JPS5293222A (ja)
AR (1) AR211720A1 (ja)
AT (1) AT349231B (ja)
AU (1) AU505466B2 (ja)
BE (1) BE850781A (ja)
BR (1) BR7700452A (ja)
CA (1) CA1094684A (ja)
CH (1) CH613797A5 (ja)
DE (1) DE2701539C2 (ja)
DK (1) DK146106C (ja)
ES (1) ES455360A1 (ja)
FR (1) FR2339928A1 (ja)
GB (1) GB1534381A (ja)
IT (1) IT1074335B (ja)
MX (1) MX143161A (ja)
NL (1) NL182258C (ja)
NO (1) NO149188C (ja)
NZ (1) NZ183152A (ja)
PL (1) PL107679B1 (ja)
SE (2) SE7700725L (ja)
ZA (1) ZA7711B (ja)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038771B2 (ja) * 1978-06-19 1985-09-03 パイオニア株式会社 光学式情報読取装置のサ−ボ装置
JPS573236A (en) * 1980-06-10 1982-01-08 Olympus Optical Co Ltd Optical information reader
JPS57111837A (en) * 1980-12-27 1982-07-12 Olympus Optical Co Ltd Signal detecting system of optical information reader
JPS5891538A (ja) * 1981-11-25 1983-05-31 Hitachi Ltd 光デイスクトラツク追跡装置
NL8204555A (nl) * 1981-11-25 1983-06-16 Hitachi Ltd Inrichting voor het registreren en weergeven van informatie.
NL8105346A (ja) * 1981-11-26 1983-06-16
NL8105347A (nl) * 1981-11-26 1983-06-16 Philips Nv Inrichting voor het optisch aftasten van een schijfvormige registratiedrager.
JPS58125242A (ja) * 1982-01-22 1983-07-26 Victor Co Of Japan Ltd 光学的情報信号再生装置のトラツキング誤差検出方式
JPS58150145A (ja) * 1982-03-03 1983-09-06 Toshiba Corp 光学式デジタルデイスクプレ−ヤのトラツキング制御回路
JPS58208944A (ja) * 1982-05-31 1983-12-05 Sony Corp 光学ヘツド制御信号発生装置
JPS5922242A (ja) * 1982-07-26 1984-02-04 Foster Denki Kk 情報再生装置における光学系制御信号検出回路
JPS59110045A (ja) * 1982-12-13 1984-06-25 Sanyo Electric Co Ltd 光学式ピツクアツプ装置
JPS59191144A (ja) * 1983-04-14 1984-10-30 Sony Corp 光ピツクアツプのトラツキングサ−ボ回路
JPS59198540A (ja) * 1983-04-26 1984-11-10 Asahi Optical Co Ltd 光学式デイスクプレ−ヤのトラツキングサ−ボ回路
US4740940A (en) * 1985-03-11 1988-04-26 Matsushita Electric Industrial Co., Ltd. Optical information read apparatus
JPS61248237A (ja) * 1985-04-25 1986-11-05 Sankyo Seiki Mfg Co Ltd トラツキング誤差信号検出方法
JP2796592B2 (ja) * 1985-10-17 1998-09-10 セイコーインスツルメンツ株式会社 トラツキングエラー信号発生回路
JP2824573B2 (ja) * 1985-11-08 1998-11-11 セイコーインスツルメンツ株式会社 トラツキングエラー信号発生回路
JP2906144B2 (ja) * 1986-04-09 1999-06-14 セイコーインスツルメンツ株式会社 光学ヘツド制御装置
US4958245A (en) * 1988-04-07 1990-09-18 Insite Peripherals, Inc. Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities
EP0686968B1 (en) 1994-06-07 1999-01-07 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, optical information recording method, and optical information reproducing apparatus using the same
TW364992B (en) * 1996-04-25 1999-07-21 Toshiba Corp Optic data regeneration apparatus and control method thereof
DE19723542A1 (de) 1997-06-05 1998-12-10 Thomson Brandt Gmbh Gerät zum Lesen und/oder Beschreiben optischer Aufzeichnungsträger
JP3544847B2 (ja) 1998-01-16 2004-07-21 三菱電機株式会社 光学的情報再生方法および装置
JP4875083B2 (ja) 2006-11-16 2012-02-15 パナソニック株式会社 光学式情報再生装置のトラッキング装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381086A (en) * 1962-08-16 1968-04-30 Minnesota Mining & Mfg Reproduction of television signals from photographic disc recordings
FR2235354A1 (en) * 1973-06-29 1975-01-24 Thomson Csf Photoelectric optical test sensor - measures displacement of a diffraction screen with constant spacing in the test sensor plane

Also Published As

Publication number Publication date
PL107679B1 (pl) 1980-02-29
DK30777A (da) 1977-07-29
MX143161A (es) 1981-03-26
DE2701539A1 (de) 1977-08-04
ZA7711B (en) 1978-08-30
NL7600842A (nl) 1977-08-01
ATA46077A (de) 1978-08-15
IT1074335B (it) 1985-04-20
DK146106B (da) 1983-06-27
SE7700725L (sv) 1977-07-29
NL182258C (nl) 1988-02-01
AU505466B2 (en) 1979-11-22
BE850781A (fr) 1977-07-26
NL182258B (nl) 1987-09-01
JPS5630610B2 (ja) 1981-07-16
BR7700452A (pt) 1977-10-04
AU2161677A (en) 1978-08-03
CH613797A5 (en) 1979-10-15
DE2701539C2 (de) 1981-11-12
NO149188B (no) 1983-11-21
NZ183152A (en) 1980-04-28
AR211720A1 (es) 1978-02-28
FR2339928A1 (fr) 1977-08-26
CA1094684A (en) 1981-01-27
NO770240L (no) 1977-07-29
AT349231B (de) 1979-03-26
DK146106C (da) 1983-11-21
SE408238B (sv) 1979-05-21
GB1534381A (en) 1978-12-06
JPS5293222A (en) 1977-08-05
NO149188C (no) 1984-02-29
ES455360A1 (es) 1978-01-01

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse