JPS57208644A - Driving device of objective lens - Google Patents

Driving device of objective lens

Info

Publication number
JPS57208644A
JPS57208644A JP9451581A JP9451581A JPS57208644A JP S57208644 A JPS57208644 A JP S57208644A JP 9451581 A JP9451581 A JP 9451581A JP 9451581 A JP9451581 A JP 9451581A JP S57208644 A JPS57208644 A JP S57208644A
Authority
JP
Japan
Prior art keywords
objective lens
displacement
lens
frame
arrow
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
JP9451581A
Other languages
Japanese (ja)
Inventor
Yasuhiro Ueda
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 Corp
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 Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP9451581A priority Critical patent/JPS57208644A/en
Publication of JPS57208644A publication Critical patent/JPS57208644A/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

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To improve the damping effect when an objective lens is driven in a 2-dimensional way, by setting a continuous vent hole foaming member as a damper into a space between an objective lens holding frame and a driving means so as to extend in the direction of displacement of the objective lens. CONSTITUTION:A holding frame 2 which holds an objective lens 1 is held by a pair of plate springs 4a and 4b which are set symmetrically to a plane extending toward the information track through the optical axis of the lens 1. Thus the frame can have a displacement toward an arrow (b). The mobile members 32a and 32b of high permeability are stuck to the frame 2 and move toward an arrow (b) by flowing a current to two sets of coils 35a and 35b plus 38a and 38b of the driving means which act together with the mobiles 32a and 32b. Thus the response characteristics of the members 32a and 32b can be enhanced since the foamed rubbers 36a and 36b are attached to the side of the permanent magnets 34a and 34b that extend toward the displacement direction (b) of the lens 1.
JP9451581A 1981-06-18 1981-06-18 Driving device of objective lens Pending JPS57208644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9451581A JPS57208644A (en) 1981-06-18 1981-06-18 Driving device of objective lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9451581A JPS57208644A (en) 1981-06-18 1981-06-18 Driving device of objective lens

Publications (1)

Publication Number Publication Date
JPS57208644A true JPS57208644A (en) 1982-12-21

Family

ID=14112454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9451581A Pending JPS57208644A (en) 1981-06-18 1981-06-18 Driving device of objective lens

Country Status (1)

Country Link
JP (1) JPS57208644A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561079A (en) * 1982-09-08 1985-12-24 Pioneer Electronic Corporation Support structure of an optical part
US4720088A (en) * 1983-05-18 1988-01-19 Canon Kabushiki Kaisha Optical system supporting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561079A (en) * 1982-09-08 1985-12-24 Pioneer Electronic Corporation Support structure of an optical part
US4720088A (en) * 1983-05-18 1988-01-19 Canon Kabushiki Kaisha Optical system supporting device

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