DE3480619D1 - Servosystem zum positionieren eines optischen strahls. - Google Patents

Servosystem zum positionieren eines optischen strahls.

Info

Publication number
DE3480619D1
DE3480619D1 DE8484111162T DE3480619T DE3480619D1 DE 3480619 D1 DE3480619 D1 DE 3480619D1 DE 8484111162 T DE8484111162 T DE 8484111162T DE 3480619 T DE3480619 T DE 3480619T DE 3480619 D1 DE3480619 D1 DE 3480619D1
Authority
DE
Germany
Prior art keywords
positioning
optical beam
servo system
servo
optical
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
DE8484111162T
Other languages
English (en)
Inventor
Yoshikazu Fujii
Tetsuya Inui
Toshihisa Daiya-Height Deguchi
Tohru Okuda
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.)
Sharp Corp
Original Assignee
Sharp 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 JP21145983A external-priority patent/JPS60103567A/ja
Priority claimed from JP59003795A external-priority patent/JP2607237B2/ja
Priority claimed from JP379484A external-priority patent/JPS60147942A/ja
Priority claimed from JP9358484A external-priority patent/JPS60236125A/ja
Priority claimed from JP10678084A external-priority patent/JPS60251531A/ja
Application filed by Sharp Corp filed Critical Sharp Corp
Application granted granted Critical
Publication of DE3480619D1 publication Critical patent/DE3480619D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition 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
    • G11B7/095Disposition 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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0953Disposition 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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055Disposition or mounting of transducers relative to record carriers
    • G11B11/10556Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055Disposition or mounting of transducers relative to record carriers
    • G11B11/10576Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08517Methods for track change, selection or preliminary positioning by moving the head with tracking pull-in only
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition 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
    • G11B7/0941Methods and circuits for servo gain or phase compensation during operation
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition 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
    • G11B7/0946Disposition 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 specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition 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
    • G11B7/0908Disposition 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
DE8484111162T 1983-11-09 1984-09-19 Servosystem zum positionieren eines optischen strahls. Expired - Lifetime DE3480619D1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP21145983A JPS60103567A (ja) 1983-11-09 1983-11-09 光集束位置制御装置
JP59003795A JP2607237B2 (ja) 1984-01-10 1984-01-10 光集束位置制御装置
JP379484A JPS60147942A (ja) 1984-01-10 1984-01-10 光集束位置制御装置
JP9358484A JPS60236125A (ja) 1984-05-09 1984-05-09 光集束位置制御装置
JP10678084A JPS60251531A (ja) 1984-05-25 1984-05-25 光集束位置制御装置

Publications (1)

Publication Number Publication Date
DE3480619D1 true DE3480619D1 (de) 1990-01-04

Family

ID=27518397

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8787112122T Expired - Lifetime DE3485675D1 (de) 1983-11-09 1984-09-19 Servosystem zum positionieren eines optischen strahls.
DE8484111162T Expired - Lifetime DE3480619D1 (de) 1983-11-09 1984-09-19 Servosystem zum positionieren eines optischen strahls.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE8787112122T Expired - Lifetime DE3485675D1 (de) 1983-11-09 1984-09-19 Servosystem zum positionieren eines optischen strahls.

Country Status (4)

Country Link
US (1) US4667315A (de)
EP (1) EP0151220B1 (de)
CA (1) CA1224872A (de)
DE (2) DE3485675D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2666248B2 (ja) * 1985-08-03 1997-10-22 オリンパス光学工業株式会社 光学的情報記録再生装置
KR100230228B1 (ko) * 1993-07-31 1999-11-15 윤종용 광디스크 시스템의 포커싱 제어장치
JPH07201050A (ja) * 1993-12-31 1995-08-04 Nippon Conlux Co Ltd 光学的記録再生装置
JP3642720B2 (ja) * 2000-06-30 2005-04-27 富士通株式会社 記憶装置、トラッキング制御方法及びそのトラッキング制御装置
JP3873770B2 (ja) * 2002-02-19 2007-01-24 ソニー株式会社 光学式ヘッド装置、および、光学式記録・再生装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005260A (en) * 1972-11-11 1977-01-25 U.S. Philips Corporation Device for reading a disk-shaped record carrier with time base correction
NL7901721A (nl) * 1979-03-05 1980-09-09 Philips Nv Regelsysteem.
JPS57120238A (en) * 1981-01-16 1982-07-27 Matsushita Electric Ind Co Ltd Reproducing device
NL8200208A (nl) * 1982-01-21 1983-08-16 Philips Nv Inrichting voor het uitlezen van een schijfvormige registratiedrager.

Also Published As

Publication number Publication date
EP0151220B1 (de) 1989-11-29
EP0151220A1 (de) 1985-08-14
CA1224872A (en) 1987-07-28
US4667315A (en) 1987-05-19
DE3485675D1 (de) 1992-05-27

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition