JPS57133528A - Optical head - Google Patents

Optical head

Info

Publication number
JPS57133528A
JPS57133528A JP1903081A JP1903081A JPS57133528A JP S57133528 A JPS57133528 A JP S57133528A JP 1903081 A JP1903081 A JP 1903081A JP 1903081 A JP1903081 A JP 1903081A JP S57133528 A JPS57133528 A JP S57133528A
Authority
JP
Japan
Prior art keywords
magnet
shaft
guide
fluid
vibration
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
JP1903081A
Other languages
Japanese (ja)
Inventor
Kikuji Kato
Susumu Yonezawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1903081A priority Critical patent/JPS57133528A/en
Publication of JPS57133528A publication Critical patent/JPS57133528A/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

Abstract

PURPOSE:To suppress the undesired vibration factors excepting the one in the horizontl direction, by using a magnet and a magnetic fluid at a support mechanism part where a mobile casing of a head is supported so as to be movable only toward the horizontal direction from both side surfaces of the casing. CONSTITUTION:A guide member 23 consists of a magnet 27 and a pole piece 28 made of a megnetic material, and a guide shaft 24 is made of a nonmagnetic material. A magnetic fluid 29 is provided between the piece 28 and the shaft 24. As the fluid 29 exists between the member 23 and the shaft 24, the vibration is possible only in a direction. A guide protruded streak 23' and a guide groove 24' are used in place of the member 23 and the shaft 24 respectively, and a magnet 30 is fixed at the side of the groove 24', and the fluid 29 can also be provided between the magnet 30 and the streak 24'. In this case, the vibration is also possible only in a direction.
JP1903081A 1981-02-13 1981-02-13 Optical head Pending JPS57133528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1903081A JPS57133528A (en) 1981-02-13 1981-02-13 Optical head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1903081A JPS57133528A (en) 1981-02-13 1981-02-13 Optical head

Publications (1)

Publication Number Publication Date
JPS57133528A true JPS57133528A (en) 1982-08-18

Family

ID=11988051

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1903081A Pending JPS57133528A (en) 1981-02-13 1981-02-13 Optical head

Country Status (1)

Country Link
JP (1) JPS57133528A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6439641A (en) * 1987-08-05 1989-02-09 Seiko Epson Corp Objective lens actuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6439641A (en) * 1987-08-05 1989-02-09 Seiko Epson Corp Objective lens actuator
JP2621200B2 (en) * 1987-08-05 1997-06-18 セイコーエプソン株式会社 Objective lens actuator

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