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JPS57176542A - Optical system driving device in recording information reader - Google Patents

Optical system driving device in recording information reader

Info

Publication number
JPS57176542A
JPS57176542A JP5945081A JP5945081A JPS57176542A JP S57176542 A JPS57176542 A JP S57176542A JP 5945081 A JP5945081 A JP 5945081A JP 5945081 A JP5945081 A JP 5945081A JP S57176542 A JPS57176542 A JP S57176542A
Authority
JP
Japan
Prior art keywords
coil
optical system
magnetic field
current
wound around
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
JP5945081A
Other languages
Japanese (ja)
Other versions
JPS6346889B2 (en
Inventor
Takeo Yamamoto
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP5945081A priority Critical patent/JPS57176542A/en
Publication of JPS57176542A publication Critical patent/JPS57176542A/en
Publication of JPS6346889B2 publication Critical patent/JPS6346889B2/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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To obtain small-sized and lightweight moving part for excellent high frequency follow-up characteristic, by the constitution that a moving coil is wound around an optical system, a plurality of magnetic field generating means for generating a magnetic field crossing this coil is provided and the magnetic flux density is changed. CONSTITUTION:A moving coil 12 is wound around a barrel 6, and 4 sets of magnetic field generating means 13, 13' for generating a magnetic field crossing the coil 12 are located at an angle of 90 deg.. When a in-phase current based on a focus error signal is flowed to driving coils 15 and 15' by being superimposed on a DC current, a force exerted on the coil 12 is changed, an optical system moves toward the light axis direction for focus servo. Next, when a current of opposite phase based on a tracking error signal flows to the coils 15 and 15' by being superimposed on the DC current, the optical system is tilted for tracking servo. Since the coil is wound around the lens barrel 6, the moving part is made small in size and light in weight, allowing excellent high-frequency follow-up characteristic.
JP5945081A 1981-04-20 1981-04-20 Optical system driving device in recording information reader Granted JPS57176542A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5945081A JPS57176542A (en) 1981-04-20 1981-04-20 Optical system driving device in recording information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5945081A JPS57176542A (en) 1981-04-20 1981-04-20 Optical system driving device in recording information reader

Publications (2)

Publication Number Publication Date
JPS57176542A true JPS57176542A (en) 1982-10-29
JPS6346889B2 JPS6346889B2 (en) 1988-09-19

Family

ID=13113633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5945081A Granted JPS57176542A (en) 1981-04-20 1981-04-20 Optical system driving device in recording information reader

Country Status (1)

Country Link
JP (1) JPS57176542A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60164932A (en) * 1984-02-07 1985-08-28 Sanyo Electric Co Ltd Objective lens driving device
JPH05197984A (en) * 1992-10-21 1993-08-06 Sony Corp Optical head device for disk player

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60164932A (en) * 1984-02-07 1985-08-28 Sanyo Electric Co Ltd Objective lens driving device
JPH05197984A (en) * 1992-10-21 1993-08-06 Sony Corp Optical head device for disk player

Also Published As

Publication number Publication date
JPS6346889B2 (en) 1988-09-19

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