FR2575315B1 - Appareil a laser, notamment pour enregistrement, et procede d'asservissement a une piste d'enregistrement - Google Patents

Appareil a laser, notamment pour enregistrement, et procede d'asservissement a une piste d'enregistrement

Info

Publication number
FR2575315B1
FR2575315B1 FR858516052A FR8516052A FR2575315B1 FR 2575315 B1 FR2575315 B1 FR 2575315B1 FR 858516052 A FR858516052 A FR 858516052A FR 8516052 A FR8516052 A FR 8516052A FR 2575315 B1 FR2575315 B1 FR 2575315B1
Authority
FR
France
Prior art keywords
recording
servo
laser apparatus
track
recording track
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 - Fee Related
Application number
FR858516052A
Other languages
English (en)
Other versions
FR2575315A1 (fr
Inventor
Richard Haddock
Terri Lichtenstein
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.)
Drexler Technology Corp
Original Assignee
Drexler Technology Corp
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 Drexler Technology Corp filed Critical Drexler Technology Corp
Publication of FR2575315A1 publication Critical patent/FR2575315A1/fr
Application granted granted Critical
Publication of FR2575315B1 publication Critical patent/FR2575315B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • 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
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or 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
    • G11B7/08—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
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Semiconductor Lasers (AREA)
FR858516052A 1984-12-20 1985-10-29 Appareil a laser, notamment pour enregistrement, et procede d'asservissement a une piste d'enregistrement Expired - Fee Related FR2575315B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/684,352 US4623784A (en) 1984-12-20 1984-12-20 Laser recording apparatus with off-center lens and error detection

Publications (2)

Publication Number Publication Date
FR2575315A1 FR2575315A1 (fr) 1986-06-27
FR2575315B1 true FR2575315B1 (fr) 1990-11-02

Family

ID=24747697

Family Applications (1)

Application Number Title Priority Date Filing Date
FR858516052A Expired - Fee Related FR2575315B1 (fr) 1984-12-20 1985-10-29 Appareil a laser, notamment pour enregistrement, et procede d'asservissement a une piste d'enregistrement

Country Status (5)

Country Link
US (1) US4623784A (fr)
JP (1) JPS61150391A (fr)
DE (1) DE3536103A1 (fr)
FR (1) FR2575315B1 (fr)
GB (1) GB2169123A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125567A (ja) * 1985-11-26 1987-06-06 Csk Corp 光記録媒体の角度変位修正方法
US5113061A (en) * 1987-02-13 1992-05-12 Olympus Optical Co., Ltd. Optical card having an identifier for identifying track construction and apparatus for writing and/or reading data on and/or from the optical card
JP2766348B2 (ja) * 1989-11-02 1998-06-18 オリンパス光学工業株式会社 光学ヘッド
DE69423671T2 (de) * 1993-04-23 2000-08-17 Canon K.K., Tokio/Tokyo Optisches Informationsaufzeichnungs- und/oder Wiedergabegerät
US20060059365A1 (en) * 1999-12-06 2006-03-16 Bsi2000, Inc. Facility security with optical cards
WO2003084015A1 (fr) * 2002-03-28 2003-10-09 Fujitsu Limited Dispositif a reseau de lasers et procede de commande de reseau de lasers
US20050197945A1 (en) * 2004-02-12 2005-09-08 Bsi2000, Inc. Optical banking card
US20050237338A1 (en) * 2004-04-26 2005-10-27 Bsi2000, Inc. Embedded holograms on optical cards
US20050247776A1 (en) * 2004-05-04 2005-11-10 Bsi2000, Inc. Authenticating optical-card reader
US20060039249A1 (en) * 2004-08-18 2006-02-23 Bsi2000,Inc. Systems and methods for reading optical-card data

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB353696A (en) * 1930-07-25 1931-07-30 Gen Electric Co Ltd Improvements in the reproduction of sound from sound film records
JPS4989507A (fr) * 1972-12-26 1974-08-27
NL7401858A (nl) * 1974-02-12 1975-08-14 Philips Nv Registratiedrager waarop informatie is aange- t in een optisch uitleesbare struktuur.
CA1091966A (fr) * 1976-10-15 1980-12-23 Chiaki Kojima Appareil de lecture de signaux enregistres sur support
JPS5369006A (en) * 1976-11-30 1978-06-20 Sony Corp Reproducer of disc form signal recording media
FR2460523A1 (fr) * 1979-06-29 1981-01-23 Thomson Csf Tete de lecture optique a source laser a semi-conducteur et dispositif de lecture par reflexion d'un support d'information comportant une telle tete optique
JPS6048810B2 (ja) * 1980-02-18 1985-10-29 横河電機株式会社 光学的デ−タ読取り／書き込み装置
JPS59188851A (ja) * 1983-04-11 1984-10-26 Olympus Optical Co Ltd 光学的情報読み取り装置

Also Published As

Publication number Publication date
GB2169123A (en) 1986-07-02
JPS61150391A (ja) 1986-07-09
DE3536103A1 (de) 1986-06-26
FR2575315A1 (fr) 1986-06-27
GB8524168D0 (en) 1985-11-06
US4623784A (en) 1986-11-18

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Legal Events

Date Code Title Description
ST Notification of lapse