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JPS57172535A - Multidimensional driver - Google Patents

Multidimensional driver

Info

Publication number
JPS57172535A
JPS57172535A JP5625381A JP5625381A JPS57172535A JP S57172535 A JPS57172535 A JP S57172535A JP 5625381 A JP5625381 A JP 5625381A JP 5625381 A JP5625381 A JP 5625381A JP S57172535 A JPS57172535 A JP S57172535A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic gap
condenser lens
plate spring
parallel plate
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
JP5625381A
Other languages
Japanese (ja)
Other versions
JPS6161448B2 (en
Inventor
Masayuki Inoue
Hideo Onuki
Yukio Fukui
Nobutaka Onuki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5625381A priority Critical patent/JPS57172535A/en
Publication of JPS57172535A publication Critical patent/JPS57172535A/en
Publication of JPS6161448B2 publication Critical patent/JPS6161448B2/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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

PURPOSE:To prevent resonance from occurring by removing a parallel plate spring from a multidimensional driver for a condenser lens, by charging magnetic gaps with magnetic fluids. CONSTITUTION:The 1st magnetic gap 15a between a Z-axial driving coil 8 and a yoke 11, the 2nd magnetic gap 15b between a couple of tracking coils 17a and 17b, and yokes 11 and 12, and the 3rd magnetic gap 15c between yoke end parts 11c and 12c are charged with magnetic fluids 15a-15c respectively. Consequently, a condenser lens 1 having a small angle of is usable, the need for a parallel plate spring is eliminated, and the occurrence of high frequency resonance is prevented.
JP5625381A 1981-04-16 1981-04-16 Multidimensional driver Granted JPS57172535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5625381A JPS57172535A (en) 1981-04-16 1981-04-16 Multidimensional driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5625381A JPS57172535A (en) 1981-04-16 1981-04-16 Multidimensional driver

Publications (2)

Publication Number Publication Date
JPS57172535A true JPS57172535A (en) 1982-10-23
JPS6161448B2 JPS6161448B2 (en) 1986-12-25

Family

ID=13021912

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5625381A Granted JPS57172535A (en) 1981-04-16 1981-04-16 Multidimensional driver

Country Status (1)

Country Link
JP (1) JPS57172535A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314200A2 (en) * 1983-01-25 1989-05-03 Sharp Kabushiki Kaisha Optical focus position control device
JP2018169468A (en) * 2017-03-29 2018-11-01 株式会社タムロン Actuator, lens unit having the same, and camera

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314200A2 (en) * 1983-01-25 1989-05-03 Sharp Kabushiki Kaisha Optical focus position control device
JP2018169468A (en) * 2017-03-29 2018-11-01 株式会社タムロン Actuator, lens unit having the same, and camera

Also Published As

Publication number Publication date
JPS6161448B2 (en) 1986-12-25

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