JPS57100633A - Controller for light focusing position - Google Patents

Controller for light focusing position

Info

Publication number
JPS57100633A
JPS57100633A JP55176081A JP17608180A JPS57100633A JP S57100633 A JPS57100633 A JP S57100633A JP 55176081 A JP55176081 A JP 55176081A JP 17608180 A JP17608180 A JP 17608180A JP S57100633 A JPS57100633 A JP S57100633A
Authority
JP
Japan
Prior art keywords
lens
focusing
tracking
barrel
lens barrel
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
JP55176081A
Other languages
Japanese (ja)
Inventor
Yoshikazu Goto
Kanji Nishii
Shunji Harikae
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55176081A priority Critical patent/JPS57100633A/en
Publication of JPS57100633A publication Critical patent/JPS57100633A/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

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To improve focusing and tracking characteristics by coupling a lens barrel which contains an objective lens and a lens-barrel holder which has a focus driving part through a bearing, and by supporting the rotary shaft of the lens barrel with elastic rubber. CONSTITUTION:When a current is flowed through a movable coil 27 for focusing, a lens-barrel holder 24 is guided in a sliding bearing 23 by the magnetic force of a magnetic circuit 28 for focusing to slide in an optical-axis direction. Since a lens barrel 22 and the lens-barrel holder 24 are coupled together through a bearing 25, they move in one body in the optical-axis direction to perform focusing. When a current is flowed through a movable coil 35 for tracking, force operates in a direction B-B' by the magnetic force of a magnetic circuit 36 for tracking. The lens barrel 22 is supported on the rotary shaft 23 and held at an optical-axis position with elastic rubber 26 fitted to the rotary shaft 23, so the lens barrel 22 oscillates in the direction B-B' to perform tracking. Consequently, the focusing and tracking are performed excellently.
JP55176081A 1980-12-12 1980-12-12 Controller for light focusing position Pending JPS57100633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55176081A JPS57100633A (en) 1980-12-12 1980-12-12 Controller for light focusing position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55176081A JPS57100633A (en) 1980-12-12 1980-12-12 Controller for light focusing position

Publications (1)

Publication Number Publication Date
JPS57100633A true JPS57100633A (en) 1982-06-22

Family

ID=16007380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55176081A Pending JPS57100633A (en) 1980-12-12 1980-12-12 Controller for light focusing position

Country Status (1)

Country Link
JP (1) JPS57100633A (en)

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