CA1068404A - Optical read-out system - Google Patents

Optical read-out system

Info

Publication number
CA1068404A
CA1068404A CA262,252A CA262252A CA1068404A CA 1068404 A CA1068404 A CA 1068404A CA 262252 A CA262252 A CA 262252A CA 1068404 A CA1068404 A CA 1068404A
Authority
CA
Canada
Prior art keywords
lens
reading
readout system
optical readout
optical
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
CA262,252A
Other languages
English (en)
French (fr)
Inventor
Claude Bricot
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt 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-Brandt SA filed Critical Thomson-Brandt SA
Application granted granted Critical
Publication of CA1068404A publication Critical patent/CA1068404A/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
    • 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
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • 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)
  • Automatic Focus Adjustment (AREA)
CA262,252A 1975-09-29 1976-09-28 Optical read-out system Expired CA1068404A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7529707A FR2325987A1 (fr) 1975-09-29 1975-09-29 Dispositif de lecture optique d'un enregistrement

Publications (1)

Publication Number Publication Date
CA1068404A true CA1068404A (en) 1979-12-18

Family

ID=9160561

Family Applications (1)

Application Number Title Priority Date Filing Date
CA262,252A Expired CA1068404A (en) 1975-09-29 1976-09-28 Optical read-out system

Country Status (6)

Country Link
US (1) US4059841A (enExample)
JP (1) JPS599085B2 (enExample)
CA (1) CA1068404A (enExample)
DE (1) DE2643990C2 (enExample)
FR (1) FR2325987A1 (enExample)
GB (1) GB1563318A (enExample)

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JPS5819744A (ja) * 1981-07-24 1983-02-04 Sony Corp 光学式記録再生装置
JPS58102342A (ja) * 1981-12-14 1983-06-17 Mitsubishi Electric Corp 光学式情報再生装置
JPS5938937A (ja) * 1982-08-25 1984-03-03 Akai Electric Co Ltd 非点収差式光ピツクアツプ
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
US4555968A (en) * 1984-06-07 1985-12-03 Preco Industries, Inc. Web fed die cutting press having automatic 3-axis die registration system
JPH069090B2 (ja) * 1984-06-12 1994-02-02 株式会社東芝 光学ヘツド
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JPS6175684A (ja) * 1984-09-21 1986-04-18 Canon Inc カメラ
US4899327A (en) * 1985-02-04 1990-02-06 International Business Machines Corporation Focus servo loop correction
US4823330A (en) * 1985-02-04 1989-04-18 International Business Machines Corporation Focus servo loop off-set compensation
JPS61177646A (ja) * 1985-02-04 1986-08-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション 光学デイスク装置
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JPS62132242A (ja) * 1985-12-04 1987-06-15 Hitachi Ltd 光デイスク装置
JPH063648B2 (ja) * 1986-01-16 1994-01-12 松下電器産業株式会社 光学的情報再生装置
US4799210A (en) * 1986-11-05 1989-01-17 Unisys Corporation Fiber optic read/write head for an optical disk memory system
JPH0770088B2 (ja) * 1986-12-18 1995-07-31 キヤノン電子株式会社 光検出器
JPH0777048B2 (ja) * 1987-06-26 1995-08-16 三菱電機株式会社 記録媒体駆動装置
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
US6141300A (en) * 1989-06-20 2000-10-31 Discovision Associates Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same
US5265079A (en) 1991-02-15 1993-11-23 Applied Magnetics Corporation Seek actuator for optical recording
US5161133A (en) * 1989-09-29 1992-11-03 International Business Machines Corporation Magneto-optical storage system
JPH03130972A (ja) * 1989-10-16 1991-06-04 Matsushita Electric Ind Co Ltd トラック検索装置及びトラッキング制御装置
US5729511A (en) * 1991-02-15 1998-03-17 Discovision Associates Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
US6069857A (en) * 1991-02-15 2000-05-30 Discovision Associates Optical disc system having improved circuitry for performing blank sector check on readable disc
US6236625B1 (en) * 1991-02-15 2001-05-22 Discovision Associates Optical disc system having current monitoring circuit with controller for laser driver and method for operating same
US5677899A (en) * 1991-02-15 1997-10-14 Discovision Associates Method for moving carriage assembly from initial position to target position relative to storage medium
US5353272A (en) * 1992-12-29 1994-10-04 Eastman Kodak Company Apparatus and method for a modified half-aperture focus/tracking/data sensor system
FR2723243B1 (fr) * 1994-07-26 1996-09-06 Thomson Csf Dispositif d'enregistrement et/ou de lecture de tetes magnetiques et son procede de realisation
US6091684A (en) * 1995-01-25 2000-07-18 Discovision Associates Optical disc system and method for changing the rotational rate of an information storage medium
US6434087B1 (en) 1995-01-25 2002-08-13 Discovision Associates Optical disc system and method for controlling bias coil and light source to process information on a storage medium
US5748578A (en) * 1995-01-25 1998-05-05 Discovision Associates Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same
FR2739965B1 (fr) * 1995-10-17 1997-11-07 Thomson Csf Dispositif emetteur-recepteur de lumiere et systeme de lecture optique
DE19611904A1 (de) * 1996-03-26 1997-10-02 Thomson Brandt Gmbh Gerät zum Lesen und/oder Beschreiben optischer Aufzeichnungsträger
FR2786345B1 (fr) 1998-11-24 2001-02-09 Thomson Csf Dispositif de cryptage quantique
US7149173B2 (en) * 2000-10-17 2006-12-12 Thales Medium for recording optically readable data, method for making same and optical system reproducing said data
US6657219B2 (en) * 2001-02-12 2003-12-02 International Business Machines Corporation Optical detection and measurement system
FR2824905B1 (fr) * 2001-05-15 2003-08-29 Thomson Csf Gyrometre a fibre optique
RU2208857C2 (ru) * 2001-07-05 2003-07-20 ООО Предприятие "ЗИП-Научприбор" Измерительный шунт
RU2742816C1 (ru) * 2020-03-24 2021-02-11 Общество с ограниченной ответственностью «ФОРМ» Низкоиндуктивный шунт

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FR2212070A6 (enExample) * 1972-08-25 1974-07-19 Thomson Csf
US3909608A (en) * 1972-12-26 1975-09-30 Thomson Csf Reproducing device for the optical reading out of a record carrying an embossed print
FR2266932B1 (enExample) * 1973-03-02 1977-09-02 Thomson Brandt
FR2235448B1 (enExample) * 1973-06-29 1976-05-07 Thomson Brandt
DE2445333A1 (de) * 1973-10-01 1975-04-10 Philips Nv Optoelektronisches system zur bestimmung einer abweichung zwischen der istlage und der sollage einer ebene in einem optischen abbildungssystem
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Also Published As

Publication number Publication date
DE2643990A1 (de) 1977-04-14
FR2325987B1 (enExample) 1979-04-06
GB1563318A (en) 1980-03-26
FR2325987A1 (fr) 1977-04-22
JPS5242743A (en) 1977-04-02
US4059841A (en) 1977-11-22
DE2643990C2 (de) 1983-11-24
JPS599085B2 (ja) 1984-02-29

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