JPS5774840A - Optical scanner - Google Patents

Optical scanner

Info

Publication number
JPS5774840A
JPS5774840A JP55150525A JP15052580A JPS5774840A JP S5774840 A JPS5774840 A JP S5774840A JP 55150525 A JP55150525 A JP 55150525A JP 15052580 A JP15052580 A JP 15052580A JP S5774840 A JPS5774840 A JP S5774840A
Authority
JP
Japan
Prior art keywords
driving
yoke
objective lens
coil
optical scanner
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
JP55150525A
Other languages
Japanese (ja)
Inventor
Shoji Oba
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 JP55150525A priority Critical patent/JPS5774840A/en
Publication of JPS5774840A publication Critical patent/JPS5774840A/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
    • G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE:To obtain an optical scanner of a simple and compact structure, by electrically driving an objective lens held by 2 parallel plate springs, executing a high speed follow-up in the radial direction of a recording carrier, driving the objective in the vertical direction, executing the focusing, and also relatively driving an arm member. CONSTITUTION:An objective lens 18 containing a permanent magnet 19 is held by 2 parallel plate springs 15, and is moved at a high speed in the direction meeting at right angles with the optical axis by driving force of a coil 21 which has been wound round a yoke 20 through an insulating layer. Also, in a ring-like air-gap 9 in the magnetic circuit consisting of a permanent magnet 7 and a yoke 8 tightly stuck to both end parts in its axial direction, a cylindrical coil 10 is installed to a flange 11' of a cylindrical holder 11 placed in the hole of the yoke 8. When a current is made to flow through the coil 10, the objective lens placed in the upper part of the holder 11 is driven in the axial direction. Also, a low speed follow-up is executed by driving the arm member relatively. In this way, an optical scanner of a sample and compact structure is obtained.
JP55150525A 1980-10-27 1980-10-27 Optical scanner Pending JPS5774840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55150525A JPS5774840A (en) 1980-10-27 1980-10-27 Optical scanner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55150525A JPS5774840A (en) 1980-10-27 1980-10-27 Optical scanner

Publications (1)

Publication Number Publication Date
JPS5774840A true JPS5774840A (en) 1982-05-11

Family

ID=15498764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55150525A Pending JPS5774840A (en) 1980-10-27 1980-10-27 Optical scanner

Country Status (1)

Country Link
JP (1) JPS5774840A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950038U (en) * 1982-09-21 1984-04-03 フオスタ−電機株式会社 Objective lens drive device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950038U (en) * 1982-09-21 1984-04-03 フオスタ−電機株式会社 Objective lens drive device

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