JPS57195338A - Tracking mechanism for optical head - Google Patents

Tracking mechanism for optical head

Info

Publication number
JPS57195338A
JPS57195338A JP7900081A JP7900081A JPS57195338A JP S57195338 A JPS57195338 A JP S57195338A JP 7900081 A JP7900081 A JP 7900081A JP 7900081 A JP7900081 A JP 7900081A JP S57195338 A JPS57195338 A JP S57195338A
Authority
JP
Japan
Prior art keywords
housing
cylinder
hollow part
center pole
piston
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.)
Pending
Application number
JP7900081A
Other languages
Japanese (ja)
Inventor
Kikuji Kato
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7900081A priority Critical patent/JPS57195338A/en
Publication of JPS57195338A publication Critical patent/JPS57195338A/en
Pending 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
    • G11B7/0932—Details of sprung supports
    • 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 achieve adequate damping by providing a hollow part to the center pole of the magnetic circuit of a driving element for tracking, and then providing a sampling element in the hollow part. CONSTITUTION:A track driving element 40 consists of a coil 41 provided on one side of a track movable housing 20, a magnetic circuit 42 provided at the corresponding position in an external housing 30, and a damping element 43 provided to a center pole 42a. The damping element 43 consists of a cylinder 44 fitted in a hollow part 42a' projected in the center pole 42, a piston 45 a little bit thinner than the cylinder, a shaft 46 fixed at one end to the piston 45 and fitted threadedly in the housing 20 at the other end, oil injected into the cylinder 44, and a viscous fluid 47, such as a magnetic fluid, and its viscous resistance damps the housing 20.
JP7900081A 1981-05-25 1981-05-25 Tracking mechanism for optical head Pending JPS57195338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7900081A JPS57195338A (en) 1981-05-25 1981-05-25 Tracking mechanism for optical head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7900081A JPS57195338A (en) 1981-05-25 1981-05-25 Tracking mechanism for optical head

Publications (1)

Publication Number Publication Date
JPS57195338A true JPS57195338A (en) 1982-12-01

Family

ID=13677631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7900081A Pending JPS57195338A (en) 1981-05-25 1981-05-25 Tracking mechanism for optical head

Country Status (1)

Country Link
JP (1) JPS57195338A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157735A (en) * 1984-01-27 1985-08-19 Audio Technica Corp Optical pickup device
JPS6362924U (en) * 1986-10-07 1988-04-26
US4932019A (en) * 1988-03-04 1990-06-05 Pioneer Electronic Corporation Disk player having a vibration dissipating device
EP0405604A2 (en) * 1989-06-30 1991-01-02 Fuji Xerox Co., Ltd. Magnetic optical recording/reproducing apparatus
EP0618570A1 (en) * 1993-04-02 1994-10-05 Koninklijke Philips Electronics N.V. Apparatus for recording and/or reading information by means of a radiation beam

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157735A (en) * 1984-01-27 1985-08-19 Audio Technica Corp Optical pickup device
JPS6362924U (en) * 1986-10-07 1988-04-26
JPH0531693Y2 (en) * 1986-10-07 1993-08-16
US4932019A (en) * 1988-03-04 1990-06-05 Pioneer Electronic Corporation Disk player having a vibration dissipating device
EP0405604A2 (en) * 1989-06-30 1991-01-02 Fuji Xerox Co., Ltd. Magnetic optical recording/reproducing apparatus
EP0618570A1 (en) * 1993-04-02 1994-10-05 Koninklijke Philips Electronics N.V. Apparatus for recording and/or reading information by means of a radiation beam

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