JPH0230094B2 - - Google Patents

Info

Publication number
JPH0230094B2
JPH0230094B2 JP55114470A JP11447080A JPH0230094B2 JP H0230094 B2 JPH0230094 B2 JP H0230094B2 JP 55114470 A JP55114470 A JP 55114470A JP 11447080 A JP11447080 A JP 11447080A JP H0230094 B2 JPH0230094 B2 JP H0230094B2
Authority
JP
Japan
Prior art keywords
main beam
sub
light
track
photodetector
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 - Lifetime
Application number
JP55114470A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5737742A (en
Inventor
Tooru Musha
Kiichi Kato
Kenichi Ito
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.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP11447080A priority Critical patent/JPS5737742A/ja
Priority to US06/293,082 priority patent/US4453239A/en
Publication of JPS5737742A publication Critical patent/JPS5737742A/ja
Publication of JPH0230094B2 publication Critical patent/JPH0230094B2/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
    • 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
    • G11B7/0901—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
    • G11B7/0903—Multi-beam tracking systems
    • 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
    • G11B2007/0919—Critical angle methods

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP11447080A 1980-08-19 1980-08-19 Method and device for optical information recording Granted JPS5737742A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11447080A JPS5737742A (en) 1980-08-19 1980-08-19 Method and device for optical information recording
US06/293,082 US4453239A (en) 1980-08-19 1981-08-14 Method and apparatus for controlling the focusing and tracking of a light beam using a main and secondary light beam in association with multiple detectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11447080A JPS5737742A (en) 1980-08-19 1980-08-19 Method and device for optical information recording

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP3151881A Division JPS5738410A (en) 1981-03-05 1981-03-05 Separating method of luminous flux

Publications (2)

Publication Number Publication Date
JPS5737742A JPS5737742A (en) 1982-03-02
JPH0230094B2 true JPH0230094B2 (en, 2012) 1990-07-04

Family

ID=14638532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11447080A Granted JPS5737742A (en) 1980-08-19 1980-08-19 Method and device for optical information recording

Country Status (2)

Country Link
US (1) US4453239A (en, 2012)
JP (1) JPS5737742A (en, 2012)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5758249A (en) * 1980-09-24 1982-04-07 Olympus Optical Co Ltd Optical system recording and/or reproducing device
JPS5990007A (ja) * 1982-11-16 1984-05-24 Olympus Optical Co Ltd 光学式寸度測定装置
US4695992A (en) * 1983-01-31 1987-09-22 Canon Kabushiki Kaisha Optical information recording-reproducing apparatus in which the relative position of a primary beam and secondary beams on recording medium is varied during recording and reproduction of information
US4700335A (en) * 1983-01-31 1987-10-13 Canon Kabushiki Kaisha Method and apparatus for recording a continuous spiral information track with different track pitches
JPH0687316B2 (ja) * 1983-02-10 1994-11-02 オリンパス光学工業株式会社 光学式再生装置
DE3304780A1 (de) * 1983-02-11 1984-08-30 Rodenstock Optik G Vorrichtung zur ermittlung einer oberflaechenstruktur, insbesondere der rauheit
EP0241537A1 (en) * 1985-10-10 1987-10-21 Opticon Technology Incorporated Apparatus for recording and reading optical data marks on an optical medium
US4727528A (en) * 1986-04-22 1988-02-23 Sri International Optical media tracking method and apparatus for optical storage system
US4998011A (en) * 1989-11-17 1991-03-05 Applied Magnetics Corporation Flat plate focus sensing apparatus
US5101393A (en) * 1990-07-25 1992-03-31 Hewlett-Packard Company Optical position error detection using complementary steep angle reflections/transmissions
GB2248989B (en) * 1990-10-15 1995-05-24 Applied Magnetics Corp Focus sensing apparatus and method
US5245174A (en) * 1990-10-15 1993-09-14 Applied Magnetics Corporation Focus sensing apparatus utilizing a reflecting surface having variable reflectivity
US5255139A (en) * 1991-03-18 1993-10-19 Applied Magnetics Corporation Ferrite capped Winchester-style slider
US5210929A (en) * 1991-03-18 1993-05-18 Applied Magnetics Corporation Method of making a ferrite capped Winchester-style slider
US5331622A (en) * 1991-05-28 1994-07-19 Applied Magnetics Corporation Compact optical head
US5646778A (en) * 1991-05-28 1997-07-08 Discovision Associates Optical beamsplitter
JP2633417B2 (ja) * 1991-08-02 1997-07-23 シャープ株式会社 光記録媒体駆動装置
JP4746796B2 (ja) * 2000-11-29 2011-08-10 ダイセルノバフォーム株式会社 発泡ネット

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016423A (en, 2012) * 1973-06-11 1975-02-21
NL182257C (nl) * 1974-12-23 1988-02-01 Philips Nv Inrichting voor het uitlezen van een vlakke reflekterende registratiedrager waarop informatie is aangebracht in een optisch uitleesbare struktuur.
FR2366636A1 (fr) * 1976-10-01 1978-04-28 Thomson Brandt Dispositif d'enregistrement optique d'information sur un support avec asservissement de la position de la tache d'enregistrement sur le support d'information
NL7907216A (nl) * 1979-09-28 1981-03-31 Philips Nv Optisch fokusfout-detektiestelsel.

Also Published As

Publication number Publication date
JPS5737742A (en) 1982-03-02
US4453239A (en) 1984-06-05

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