JPS5476107A - Focus controller - Google Patents

Focus controller

Info

Publication number
JPS5476107A
JPS5476107A JP14267577A JP14267577A JPS5476107A JP S5476107 A JPS5476107 A JP S5476107A JP 14267577 A JP14267577 A JP 14267577A JP 14267577 A JP14267577 A JP 14267577A JP S5476107 A JPS5476107 A JP S5476107A
Authority
JP
Japan
Prior art keywords
leaf spring
optical system
large volume
sides
driving method
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
JP14267577A
Other languages
Japanese (ja)
Other versions
JPS6114577B2 (en
Inventor
Shinichi Shirasu
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch 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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP14267577A priority Critical patent/JPS5476107A/en
Publication of JPS5476107A publication Critical patent/JPS5476107A/en
Publication of JPS6114577B2 publication Critical patent/JPS6114577B2/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
    • G11B7/0937—Piezoelectric actuators
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/0857—Arrangements for mechanically moving the whole head
    • G11B7/08582—Sled-type positioners

Landscapes

  • Mechanical Optical Scanning Systems (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To obtain a driving method of focus position controlling suitable for large volume production by securing an optical system to a leaf spring and providing a driving device of exerting deflecting force and couple of forces to the leaf spring. CONSTITUTION:A lens-barrel 12 disposed with an optical system such as focusing lens, semi-transparent mirror, photo detector, etc. is secured to a square frame form leaf spring 23. On the other hand, electrostrictive elements 24 are so mounted to both sides of the opposing two sides of the leaf spring 23 that their elongations and contractions become mutually opposite. The leaf spring 23 is driven by these elements 24 and the focus of the read optical system is positioned in the central part on track on the plane of an information structural body. Thereby, the driving method of focus position control suitable for large volume production may be obtained.
JP14267577A 1977-11-30 1977-11-30 Focus controller Granted JPS5476107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14267577A JPS5476107A (en) 1977-11-30 1977-11-30 Focus controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14267577A JPS5476107A (en) 1977-11-30 1977-11-30 Focus controller

Publications (2)

Publication Number Publication Date
JPS5476107A true JPS5476107A (en) 1979-06-18
JPS6114577B2 JPS6114577B2 (en) 1986-04-19

Family

ID=15320884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14267577A Granted JPS5476107A (en) 1977-11-30 1977-11-30 Focus controller

Country Status (1)

Country Link
JP (1) JPS5476107A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5668936A (en) * 1979-11-12 1981-06-09 Nippon Telegr & Teleph Corp <Ntt> Reader for optical information
JPS5719914U (en) * 1980-07-01 1982-02-02
JPS58159684U (en) * 1982-04-14 1983-10-24 オンキヨー株式会社 Optical pickup tracking correction device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5668936A (en) * 1979-11-12 1981-06-09 Nippon Telegr & Teleph Corp <Ntt> Reader for optical information
JPS5935091B2 (en) * 1979-11-12 1984-08-27 日本電信電話株式会社 optical information reader
JPS5719914U (en) * 1980-07-01 1982-02-02
JPS58159684U (en) * 1982-04-14 1983-10-24 オンキヨー株式会社 Optical pickup tracking correction device

Also Published As

Publication number Publication date
JPS6114577B2 (en) 1986-04-19

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