JPS5039102A - - Google Patents

Info

Publication number
JPS5039102A
JPS5039102A JP49074938A JP7493874A JPS5039102A JP S5039102 A JPS5039102 A JP S5039102A JP 49074938 A JP49074938 A JP 49074938A JP 7493874 A JP7493874 A JP 7493874A JP S5039102 A JPS5039102 A JP S5039102A
Authority
JP
Japan
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.)
Pending
Application number
JP49074938A
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 filed Critical
Publication of JPS5039102A publication Critical patent/JPS5039102A/ja
Pending 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
    • 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)
  • General Physics & Mathematics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP49074938A 1973-06-29 1974-06-29 Pending JPS5039102A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7324004A FR2235448B1 (ja) 1973-06-29 1973-06-29

Publications (1)

Publication Number Publication Date
JPS5039102A true JPS5039102A (ja) 1975-04-11

Family

ID=9121823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP49074938A Pending JPS5039102A (ja) 1973-06-29 1974-06-29

Country Status (5)

Country Link
US (1) US3971002A (ja)
JP (1) JPS5039102A (ja)
DE (1) DE2431206A1 (ja)
FR (1) FR2235448B1 (ja)
IT (1) IT1015453B (ja)

Families Citing this family (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5415484B2 (ja) * 1975-02-26 1979-06-15
GB1542884A (en) * 1975-04-01 1979-03-28 Asahi Chemical Ind Recording and reproducing holograms
FR2306495A1 (fr) * 1975-04-04 1976-10-29 Thomson Brandt Systeme de lecture d'un enregistrement par exploration optique ponctuelle d'une piste diffractante
US4094013A (en) * 1975-05-22 1978-06-06 U.S. Philips Corporation Optical storage disk system with disk track guide sectors
FR2313716A1 (fr) * 1975-06-03 1976-12-31 Thomson Brandt Systeme optique de lecture par reflexion d'un support d'information
US4125860A (en) * 1975-06-16 1978-11-14 Nippon Telegraph And Telephone Public Corporation Reproducer for an eraseable videodisc
FR2325987A1 (fr) * 1975-09-29 1977-04-22 Thomson Brandt Dispositif de lecture optique d'un enregistrement
DE2649549A1 (de) * 1975-10-31 1977-05-12 Hitachi Ltd Informations-wiedergabevorrichtung
US4025949A (en) * 1975-12-31 1977-05-24 Zenith Radio Corporation Symmetrical astigmatic focus sensing system
NL7600843A (nl) * 1976-01-28 1977-08-01 Philips Nv Inrichting voor het uitlezen van een registratie- drager waarop informatie, bijvoorbeeld en/of ge- luidsinformatie, is aangebracht.
FR2359476A1 (fr) * 1976-07-23 1978-02-17 Thomson Csf Procede de lecture optique d'un support d'information et lecteur optique mettant en oeuvre un tel procede de lecture
DE2634243A1 (de) * 1976-07-30 1978-02-02 Bosch Gmbh Robert System zur aufzeichnung und/oder wiedergabe von signalen mittels strahlen
JPS5363002A (en) * 1976-11-18 1978-06-06 Sony Corp Signal recording system and disk type medium for recording signal
NL7703123A (nl) * 1977-03-23 1978-09-26 Philips Nv Inrichting voor het uitlezen van een optische stralingsreflekterende registratiedrager.
US4142098A (en) * 1977-07-05 1979-02-27 Zenith Radio Corporation Optical readout for reflective video discs
US4145758A (en) * 1977-10-25 1979-03-20 Drexler Technology Corporation Error checking method and apparatus for digital data in optical recording systems
NL7809635A (nl) * 1978-09-22 1980-03-25 Philips Nv Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur.
US4243850A (en) * 1979-02-07 1981-01-06 Eastman Kodak Company Apparatus for tracking a record track on a video disc
FR2502800A1 (fr) * 1981-03-24 1982-10-01 Thomson Csf Senseur optique d'asservissement de focalisation
US4504938A (en) * 1981-04-07 1985-03-12 Victor Company Of Japan, Limited Device for feedback controlling focus of an optical system in an information recording/reproducing apparatus
JPS58147823A (ja) * 1982-02-25 1983-09-02 Mitsubishi Electric Corp トラツクずれ検出装置
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
DE3429382A1 (de) * 1983-08-10 1985-02-28 Canon K.K., Tokio/Tokyo Optischer kopf
JPS60197950A (ja) * 1984-03-22 1985-10-07 Toshiba Corp 光学ヘツド
NL8403034A (nl) * 1984-10-05 1986-05-01 Philips Nv Opto-elektronisch fokusfout-detektiestelsel.
US5056080A (en) * 1989-09-22 1991-10-08 Russell James T Optical recording/reproducing system using interference techniques
US5202878A (en) * 1990-05-24 1993-04-13 Olympus Optical Co., Ltd. Optical recording and reproducing method and apparatus for the same
US5121371A (en) * 1990-06-18 1992-06-09 Bernoulli Optical Systems Company Optical servo system for magnetic disk
JP3289798B2 (ja) * 1993-10-01 2002-06-10 パイオニア株式会社 光学式情報読み取り方法及び装置
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
KR100200848B1 (ko) * 1995-06-26 1999-06-15 윤종용 2중 초점 형성방법 및 이를 이용한 광픽업
KR970002945A (ko) * 1995-06-26 1997-01-28 김광호 2중 초점 광픽업
US5907530A (en) * 1995-08-30 1999-05-25 Samsung Electronics Co., Ltd. Optical pickup device
KR100234257B1 (ko) * 1995-08-30 1999-12-15 윤종용 대물렌즈 장치 및 안정된 포커스 서보 신호를 얻는방법 및 이를 적용한 광픽업 장치 및 두께가 다른 디스크를 판별하는 방법 및 두께가 다른 디스크로부터 정보를 재생하고 기록하는 방법
USRE39025E1 (en) * 1995-08-30 2006-03-21 Samsung Electronics Co., Ltd. Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device
KR100200857B1 (ko) * 1995-10-04 1999-06-15 윤종용 광픽업장치
FR2739965B1 (fr) * 1995-10-17 1997-11-07 Thomson Csf Dispositif emetteur-recepteur de lumiere et systeme de lecture optique
US5844676A (en) * 1997-05-29 1998-12-01 Quadrant Engineering, Inc. Method and apparatus for measuring radial error of rotating encoded disks
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
FR2824905B1 (fr) * 2001-05-15 2003-08-29 Thomson Csf Gyrometre a fibre optique
FR2849245B1 (fr) * 2002-12-20 2006-02-24 Thales Sa Procede d'authentification et d'identification optique d'objets et dispositif de mise en oeuvre
US7116514B2 (en) * 2003-10-20 2006-10-03 Quantum Corporation Methods and systems for magnetic recording
US7149050B2 (en) * 2003-10-20 2006-12-12 Quantum Corporation Diffractive position sensors and control systems
US7136255B2 (en) * 2003-10-20 2006-11-14 Quantum Corporation Servo methods and systems using masked medium edge position sensors
US7102845B2 (en) * 2003-10-20 2006-09-05 Quantum Corporation Servo methods and systems using existing data structures and medium edge position
US7085095B2 (en) * 2003-10-20 2006-08-01 Quantum Corporation Electromagnetic void-sensing probes and position control systems
US7139152B2 (en) * 2003-10-20 2006-11-21 Quantum Corporation Servo methods and systems using existing data structures and optical masks
US7184233B2 (en) * 2004-06-04 2007-02-27 Quantum Corporation Dual source tracking servo systems and associated methods
US20060103968A1 (en) * 2004-11-12 2006-05-18 Jurneke Joe K Dynamic skew compensation systems and associated methods
US7499235B2 (en) * 2005-03-18 2009-03-03 Quantum Corporation Auto-servo tape system and associated recording head
US7826169B2 (en) * 2007-04-25 2010-11-02 Quantum Corporation Servo error detection and compensation utilizing virtual data tracking servo methods

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703724A (en) * 1971-07-22 1972-11-21 Kms Ind Inc Recorder with zone plate scanner
NL160138C (nl) * 1972-05-11 1979-09-17 Philips Nv Inrichting voor het uitlezen van een vlakke registratie- drager.
US3829622A (en) * 1972-10-24 1974-08-13 Mca Disco Vision Video disc player with variably biased pneumatic head

Also Published As

Publication number Publication date
IT1015453B (it) 1977-05-10
US3971002A (en) 1976-07-20
FR2235448A1 (ja) 1975-01-24
FR2235448B1 (ja) 1976-05-07
DE2431206A1 (de) 1975-01-16

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