FR2612303B1 - Dispositif de tete optique - Google Patents

Dispositif de tete optique

Info

Publication number
FR2612303B1
FR2612303B1 FR878717704A FR8717704A FR2612303B1 FR 2612303 B1 FR2612303 B1 FR 2612303B1 FR 878717704 A FR878717704 A FR 878717704A FR 8717704 A FR8717704 A FR 8717704A FR 2612303 B1 FR2612303 B1 FR 2612303B1
Authority
FR
France
Prior art keywords
optical head
head device
optical
head
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
FR878717704A
Other languages
English (en)
Other versions
FR2612303A1 (fr
Inventor
Takayuki Nakano
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.)
FDK Corp
Original Assignee
FDK 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
Priority claimed from JP3684487U external-priority patent/JPH0514338Y2/ja
Priority claimed from JP62060655A external-priority patent/JP2631975B2/ja
Application filed by FDK Corp filed Critical FDK Corp
Publication of FR2612303A1 publication Critical patent/FR2612303A1/fr
Application granted granted Critical
Publication of FR2612303B1 publication Critical patent/FR2612303B1/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
    • 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
    • G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
    • 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
    • G11B7/0908—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 focusing 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
    • G11B7/08—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
    • G11B7/0908—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 focusing only
    • G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
    • 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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0927—Electromechanical actuators for lens positioning for focusing 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
    • G11B7/08—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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0932—Details of sprung supports

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
FR878717704A 1987-03-13 1987-12-18 Dispositif de tete optique Expired - Fee Related FR2612303B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3684487U JPH0514338Y2 (fr) 1987-03-13 1987-03-13
JP62060655A JP2631975B2 (ja) 1987-03-16 1987-03-16 フォーカス検出装置

Publications (2)

Publication Number Publication Date
FR2612303A1 FR2612303A1 (fr) 1988-09-16
FR2612303B1 true FR2612303B1 (fr) 1991-02-08

Family

ID=26375947

Family Applications (1)

Application Number Title Priority Date Filing Date
FR878717704A Expired - Fee Related FR2612303B1 (fr) 1987-03-13 1987-12-18 Dispositif de tete optique

Country Status (4)

Country Link
US (1) US4891799A (fr)
DE (1) DE3739995A1 (fr)
FR (1) FR2612303B1 (fr)
GB (1) GB2202405B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0677332B2 (ja) * 1988-05-31 1994-09-28 株式会社三協精機製作所 光ピックアップ
JP2537397B2 (ja) * 1989-03-30 1996-09-25 旭光学工業株式会社 光学式ピックアップ装置
US5182444A (en) * 1989-06-12 1993-01-26 Digital Equipment Corporation Split lens displaced long from each other along plane of cut
US4987292A (en) * 1989-06-12 1991-01-22 Digital Equipment Corporation Method and apparatus for detecting focus and tracking errors
US5132833A (en) * 1990-07-09 1992-07-21 Industrial Technology Research Institute Laser scanning system
US5617402A (en) * 1990-12-21 1997-04-01 Art Tech Gigadisc "Atg" Access and tracking device for an optical disc
US5202875A (en) * 1991-06-04 1993-04-13 International Business Machines Corporation Multiple data surface optical data storage system
EP0621587B1 (fr) * 1992-11-12 1999-09-22 Seiko Epson Corporation Dispositif de commande d'une partie optique
US5790510A (en) * 1992-11-12 1998-08-04 Seiko Epson Corporation Optical component drive device including nonparallel elastic plates
TW239211B (en) * 1993-04-02 1995-01-21 Hyundai Electronics America Electromagnetic lens actuator for optical disk drive
EP0643386A1 (fr) * 1993-09-14 1995-03-15 Kabushiki Kaisha Toshiba Appareil d'entraînement pour objectif et appareil d'entraînement pour tête optique
US5715231A (en) * 1993-09-14 1998-02-03 Kabushiki Kaisha Toshiba Objective lens driving apparatus and optical head driving apparatus
JPH0822630A (ja) * 1994-07-04 1996-01-23 Sharp Corp マルチビーム光ヘッド
DE29919989U1 (de) * 1999-11-15 2000-02-17 Leuze Electronic Gmbh & Co Optoelektronische Vorrichtung
US6968563B2 (en) * 2001-07-27 2005-11-22 Kabushiki Kaisha Toshiba Optical head
US8514675B2 (en) 2011-05-11 2013-08-20 Oracle International Corporation Suspension system for an optical pickup assembly

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL176314C (nl) * 1974-02-15 1985-03-18 Philips Nv Inrichting voor het uitlezen van een registratiedrager waarop informatie is aangebracht in een optisch uitleesbare structuur.
NL7410642A (nl) * 1974-08-08 1976-02-10 Philips Nv Opto-elektronisch fokusseringsdetektiestelsel.
NL7809635A (nl) * 1978-09-22 1980-03-25 Philips Nv Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur.
US4521680A (en) * 1981-07-20 1985-06-04 Tokyo Shibaura Denki Kabushiki Kaisha System for focusing a light beam on a light reflecting surface
DE3280137D1 (de) * 1981-09-17 1990-04-19 Toshiba Kawasaki Kk Ein optischer kopf.
US4436260A (en) * 1981-12-21 1984-03-13 The United States Of America As Represented By The Secretary Of The Air Force Optical scanner for use in confined areas
JPS5971141A (ja) * 1982-10-14 1984-04-21 Mitsubishi Electric Corp 光学的信号読出し装置
JPS59221835A (ja) * 1983-05-31 1984-12-13 Sony Corp フオ−カス誤差検出装置
JPS6012825U (ja) * 1983-06-30 1985-01-28 パイオニア株式会社 電気機械変換器の支持機構
EP0135750B1 (fr) * 1983-08-26 1988-06-22 Hitachi, Ltd. Appareil d'enregistrement et de reproduction d'informations optiques
JPH069090B2 (ja) * 1984-06-12 1994-02-02 株式会社東芝 光学ヘツド
JPH0762913B2 (ja) * 1984-08-17 1995-07-05 株式会社日立製作所 自動焦点制御方法
JPS61208641A (ja) * 1985-03-13 1986-09-17 Olympus Optical Co Ltd 光学的情報記録再生装置

Also Published As

Publication number Publication date
GB2202405A (en) 1988-09-21
FR2612303A1 (fr) 1988-09-16
GB8728369D0 (en) 1988-01-13
GB2202405B (en) 1991-04-17
US4891799A (en) 1990-01-02
DE3739995A1 (de) 1988-09-22

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Legal Events

Date Code Title Description
ST Notification of lapse