JPS6356613B2 - - Google Patents

Info

Publication number
JPS6356613B2
JPS6356613B2 JP56109014A JP10901481A JPS6356613B2 JP S6356613 B2 JPS6356613 B2 JP S6356613B2 JP 56109014 A JP56109014 A JP 56109014A JP 10901481 A JP10901481 A JP 10901481A JP S6356613 B2 JPS6356613 B2 JP S6356613B2
Authority
JP
Japan
Prior art keywords
light beam
optical
recording medium
light source
light
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
JP56109014A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5812143A (ja
Inventor
Ichiro Okumura
Yoshibumi Nishimoto
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56109014A priority Critical patent/JPS5812143A/ja
Priority to US06/394,789 priority patent/US4569039A/en
Publication of JPS5812143A publication Critical patent/JPS5812143A/ja
Publication of JPS6356613B2 publication Critical patent/JPS6356613B2/ja
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
    • G11B7/0908—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
    • 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/128—Modulators
    • 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)
JP56109014A 1981-07-13 1981-07-13 光学的情報の入出力装置 Granted JPS5812143A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56109014A JPS5812143A (ja) 1981-07-13 1981-07-13 光学的情報の入出力装置
US06/394,789 US4569039A (en) 1981-07-13 1982-07-02 Optical information output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56109014A JPS5812143A (ja) 1981-07-13 1981-07-13 光学的情報の入出力装置

Publications (2)

Publication Number Publication Date
JPS5812143A JPS5812143A (ja) 1983-01-24
JPS6356613B2 true JPS6356613B2 (en, 2012) 1988-11-08

Family

ID=14499380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56109014A Granted JPS5812143A (ja) 1981-07-13 1981-07-13 光学的情報の入出力装置

Country Status (2)

Country Link
US (1) US4569039A (en, 2012)
JP (1) JPS5812143A (en, 2012)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793696A (en) * 1987-11-13 1988-12-27 Hoechst Celanese Corporation Method and apparatus for rapid focus control in an optical data storage device
US5170217A (en) * 1989-03-31 1992-12-08 Canon Kabushiki Kaisha Object measuring apparatus using lightwave interference
US5694385A (en) * 1993-09-24 1997-12-02 Ricoh Comany, Ltd. Optical pickup apparatus
GB2307549B (en) * 1995-11-23 1999-10-20 Thomson Multimedia Sa Optical pick-up device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4989508A (en, 2012) * 1972-12-26 1974-08-27
JPS5057455A (en, 2012) * 1973-09-19 1975-05-19
US3932700A (en) * 1974-02-04 1976-01-13 Zenith Radio Corporation Focus tracking registration for optical reproducing systems
US3985952A (en) * 1974-02-04 1976-10-12 Zenith Radio Corporation Elasto-optic device for spot wobble in a video disc player
FR2323160A1 (fr) * 1975-09-03 1977-04-01 Thomson Brandt Dispositif optique de projection et lecteur optique comportant un tel dispositif
FR2330027A1 (fr) * 1975-10-28 1977-05-27 Thomson Brandt Dispositif de focalisation a vergence variable et lecteur optique comportant un tel dispositif
US4322837A (en) * 1979-08-27 1982-03-30 Discovision Associates Dithered center tracking system
US4453801A (en) * 1981-04-15 1984-06-12 Canon Kabushiki Kaisha Protected Luneburg lens

Also Published As

Publication number Publication date
US4569039A (en) 1986-02-04
JPS5812143A (ja) 1983-01-24

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