JPS57147142A - Pickup device - Google Patents

Pickup device

Info

Publication number
JPS57147142A
JPS57147142A JP3179081A JP3179081A JPS57147142A JP S57147142 A JPS57147142 A JP S57147142A JP 3179081 A JP3179081 A JP 3179081A JP 3179081 A JP3179081 A JP 3179081A JP S57147142 A JPS57147142 A JP S57147142A
Authority
JP
Japan
Prior art keywords
voice coil
pickup driving
fluctuation
circuit
fed back
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.)
Granted
Application number
JP3179081A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6130327B2 (enrdf_load_stackoverflow
Inventor
Haruhisa Takiguchi
Yukio Kurata
Kaneki Matsui
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
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP3179081A priority Critical patent/JPS57147142A/ja
Publication of JPS57147142A publication Critical patent/JPS57147142A/ja
Publication of JPS6130327B2 publication Critical patent/JPS6130327B2/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
    • 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
    • G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
    • 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
    • G11B7/0932—Details of sprung supports

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP3179081A 1981-03-04 1981-03-04 Pickup device Granted JPS57147142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3179081A JPS57147142A (en) 1981-03-04 1981-03-04 Pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3179081A JPS57147142A (en) 1981-03-04 1981-03-04 Pickup device

Publications (2)

Publication Number Publication Date
JPS57147142A true JPS57147142A (en) 1982-09-10
JPS6130327B2 JPS6130327B2 (enrdf_load_stackoverflow) 1986-07-12

Family

ID=12340854

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3179081A Granted JPS57147142A (en) 1981-03-04 1981-03-04 Pickup device

Country Status (1)

Country Link
JP (1) JPS57147142A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03132982A (ja) * 1989-10-17 1991-06-06 Ono Sokki Co Ltd 機械特性評価用光ピックアップの校正方法
EP0417303A4 (en) * 1989-03-30 1992-08-05 Hirai Engineering Corporation Roof collecting solar energy

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5161724A (enrdf_load_stackoverflow) * 1974-11-27 1976-05-28 Nippon Musical Instruments Mfg

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5161724A (enrdf_load_stackoverflow) * 1974-11-27 1976-05-28 Nippon Musical Instruments Mfg

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0417303A4 (en) * 1989-03-30 1992-08-05 Hirai Engineering Corporation Roof collecting solar energy
JPH03132982A (ja) * 1989-10-17 1991-06-06 Ono Sokki Co Ltd 機械特性評価用光ピックアップの校正方法

Also Published As

Publication number Publication date
JPS6130327B2 (enrdf_load_stackoverflow) 1986-07-12

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