JPS6120058B2 - - Google Patents

Info

Publication number
JPS6120058B2
JPS6120058B2 JP53054367A JP5436778A JPS6120058B2 JP S6120058 B2 JPS6120058 B2 JP S6120058B2 JP 53054367 A JP53054367 A JP 53054367A JP 5436778 A JP5436778 A JP 5436778A JP S6120058 B2 JPS6120058 B2 JP S6120058B2
Authority
JP
Japan
Prior art keywords
tracking
objective lens
focusing
signal
driving device
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
JP53054367A
Other languages
English (en)
Japanese (ja)
Other versions
JPS54146612A (en
Inventor
Takashi Hamaoka
Shunpei Tanaka
Tooru Musha
Kenichi Ooikami
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 JP5436778A priority Critical patent/JPS54146612A/ja
Priority to US06/035,334 priority patent/US4302830A/en
Priority to GB7915290A priority patent/GB2025110B/en
Priority to FR7911773A priority patent/FR2425782B1/fr
Priority to DE2954579A priority patent/DE2954579C2/de
Priority to DE19792918919 priority patent/DE2918919A1/de
Publication of JPS54146612A publication Critical patent/JPS54146612A/ja
Publication of JPS6120058B2 publication Critical patent/JPS6120058B2/ja
Priority to FR878706802A priority patent/FR2598546B1/fr
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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0937—Piezoelectric actuators
    • 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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Automatic Focus Adjustment (AREA)
JP5436778A 1978-05-10 1978-05-10 Optical information read device Granted JPS54146612A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP5436778A JPS54146612A (en) 1978-05-10 1978-05-10 Optical information read device
US06/035,334 US4302830A (en) 1978-05-10 1979-05-01 Optical information reading-out apparatus
GB7915290A GB2025110B (en) 1978-05-10 1979-05-02 Optical information reading out apparatus
FR7911773A FR2425782B1 (fr) 1978-05-10 1979-05-09 Appareil de lecture d'informations optiques
DE2954579A DE2954579C2 (sh) 1978-05-10 1979-05-10
DE19792918919 DE2918919A1 (de) 1978-05-10 1979-05-10 Vorrichtung zum auslesen optischer informationen aus einem aufzeichnungstraeger
FR878706802A FR2598546B1 (fr) 1978-05-10 1987-05-14 Dispositif d'entrainement d'un objectif d'appareil de lecture d'informations optiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5436778A JPS54146612A (en) 1978-05-10 1978-05-10 Optical information read device

Related Child Applications (3)

Application Number Title Priority Date Filing Date
JP15830784A Division JPS60121542A (ja) 1984-07-28 1984-07-28 対物レンズ支持装置
JP15830884A Division JPS60121543A (ja) 1984-07-28 1984-07-28 光学的情報読取装置
JP15830684A Division JPS60209937A (ja) 1984-07-28 1984-07-28 光学的情報読取装置

Publications (2)

Publication Number Publication Date
JPS54146612A JPS54146612A (en) 1979-11-16
JPS6120058B2 true JPS6120058B2 (sh) 1986-05-20

Family

ID=12968675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5436778A Granted JPS54146612A (en) 1978-05-10 1978-05-10 Optical information read device

Country Status (1)

Country Link
JP (1) JPS54146612A (sh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060927B (en) * 1979-07-24 1984-02-01 Universal Pioneer Corp Signal reading device for optical discs
US4342935A (en) * 1980-04-10 1982-08-03 Discovision Associates Binary piezoelectric drive for lens focusing system
CA1132258A (en) * 1980-05-12 1982-09-21 Herman W. Willemsen Scanning head for an optical disc system
JPS56165938A (en) * 1980-05-23 1981-12-19 Sharp Corp Optical scanner
JPS5826331A (ja) * 1981-08-11 1983-02-16 Nippon Telegr & Teleph Corp <Ntt> 光学ヘツド
JPS5860438A (ja) * 1981-10-05 1983-04-09 Mitsubishi Electric Corp 集光レンズ支持装置
JPS58222449A (ja) * 1982-06-18 1983-12-24 Matsushita Electric Ind Co Ltd 光デイスク用アクチユエ−タ
US4843600A (en) * 1985-09-13 1989-06-27 Canon Kabushiki Kaisha Recording head for magneto-optical information recording apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48101103A (sh) * 1972-02-29 1973-12-20
JPS5161725A (sh) * 1974-11-27 1976-05-28 Nippon Musical Instruments Mfg
JPS51114940A (en) * 1975-03-28 1976-10-09 Geometric Data Corp Fine focus adjustment device
JPS5248912A (en) * 1975-10-15 1977-04-19 Philips Nv Mirror device for tracing video disk reproducer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48101103A (sh) * 1972-02-29 1973-12-20
JPS5161725A (sh) * 1974-11-27 1976-05-28 Nippon Musical Instruments Mfg
JPS51114940A (en) * 1975-03-28 1976-10-09 Geometric Data Corp Fine focus adjustment device
JPS5248912A (en) * 1975-10-15 1977-04-19 Philips Nv Mirror device for tracing video disk reproducer

Also Published As

Publication number Publication date
JPS54146612A (en) 1979-11-16

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