JPS57158043A - Optical reader - Google Patents

Optical reader

Info

Publication number
JPS57158043A
JPS57158043A JP56043236A JP4323681A JPS57158043A JP S57158043 A JPS57158043 A JP S57158043A JP 56043236 A JP56043236 A JP 56043236A JP 4323681 A JP4323681 A JP 4323681A JP S57158043 A JPS57158043 A JP S57158043A
Authority
JP
Japan
Prior art keywords
lens barrel
frame body
permanent magnet
coil
parts
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
JP56043236A
Other languages
Japanese (ja)
Other versions
JPH0472295B2 (en
Inventor
Yoshiaki Hayakawa
Kazuo Hoshino
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.)
Mitsubishi Electric Corp
Mitsubishi Precision Co Ltd
Original Assignee
Mitsubishi Electric Corp
Mitsubishi Precision 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 Mitsubishi Electric Corp, Mitsubishi Precision Co Ltd filed Critical Mitsubishi Electric Corp
Priority to JP56043236A priority Critical patent/JPS57158043A/en
Publication of JPS57158043A publication Critical patent/JPS57158043A/en
Publication of JPH0472295B2 publication Critical patent/JPH0472295B2/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

Abstract

PURPOSE:To exercise fine control over the position of a lens barrel by bringing the lens barrel in contact with a barrel-like frame successively with an elastic body in its axial direction and with a flexible holding tool in a plane perpendicular to the axis, providing a permanent magnet and an air core coil, and then controlling a current. CONSTITUTION:A lens barrel comes into successive contact with a cylindrical internal frame body 12 through elastic suspending plates 18 and 20 at the upper and lower end parts of a cylindrical external frame body 10, and is displaced in the axial direction. The cylindrical internal frame body 12 comes into successive contact with the flange of the lens barrel 16 through a flexible holding tool 22, and is displaced in two dimensions in a plane perpendicular to the axis of the lens barrel. At the upper part of the external frame body 10, a permanent magnet 40 is held by parts 36 and 38, and in a gap G2, a coil 44 is provided. At the lower part of the internal frame body 12, a permanent magnet 26 is held by parts 24a and 24b, and in a gap G1 formed by a return member 28, coils 32a and 32b and unshown coils 34a and 24b are provided at right angles. The current of each coil is controlled to exercise fine control over the position of the lens barrel in three dimensions, which is suitable for the optical readout of a video disk.
JP56043236A 1981-03-26 1981-03-26 Optical reader Granted JPS57158043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56043236A JPS57158043A (en) 1981-03-26 1981-03-26 Optical reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56043236A JPS57158043A (en) 1981-03-26 1981-03-26 Optical reader

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP7088888A Division JPS63288431A (en) 1988-03-26 1988-03-26 Optical reader

Publications (2)

Publication Number Publication Date
JPS57158043A true JPS57158043A (en) 1982-09-29
JPH0472295B2 JPH0472295B2 (en) 1992-11-17

Family

ID=12658263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56043236A Granted JPS57158043A (en) 1981-03-26 1981-03-26 Optical reader

Country Status (1)

Country Link
JP (1) JPS57158043A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018828A (en) * 1983-07-12 1985-01-30 Olympus Optical Co Ltd Information track reader

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555444A (en) * 1978-10-16 1980-04-23 Hitachi Ltd Optical pickup

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555444A (en) * 1978-10-16 1980-04-23 Hitachi Ltd Optical pickup

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018828A (en) * 1983-07-12 1985-01-30 Olympus Optical Co Ltd Information track reader

Also Published As

Publication number Publication date
JPH0472295B2 (en) 1992-11-17

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