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JPS57195339A - Objective lens driver - Google Patents

Objective lens driver

Info

Publication number
JPS57195339A
JPS57195339A JP7913481A JP7913481A JPS57195339A JP S57195339 A JPS57195339 A JP S57195339A JP 7913481 A JP7913481 A JP 7913481A JP 7913481 A JP7913481 A JP 7913481A JP S57195339 A JPS57195339 A JP S57195339A
Authority
JP
Japan
Prior art keywords
lens barrel
objective lens
annular
fixed part
movable part
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
JP7913481A
Other languages
Japanese (ja)
Other versions
JPH0440784B2 (en
Inventor
Takahiro Kato
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP7913481A priority Critical patent/JPS57195339A/en
Publication of JPS57195339A publication Critical patent/JPS57195339A/en
Publication of JPH0440784B2 publication Critical patent/JPH0440784B2/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
    • G11B7/0929—Electromechanical actuators for lens positioning for tracking only
    • 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

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To reduce size in the direction of a diameter by inserting a lens barrel which has an objective lens into a cylindrical coil bobbin, and then driving the lens barrel by applying electromagnetic force to a magnet provided to the lens barrel. CONSTITUTION:A movable part 1 inserted into a cylindrical cover 2 made of a nonmagnetic material consists of an objective lens 4 fitted in a lens barrel 3, and the 1st and 2nd annular yokes 6 and 7 stuck to the top and reverse surfaces of an annular magnet 5. Currents are flowed through coils 8 and 9 in the opposite directions to move up and down the movable part 1. The movement is constrained by a coiled spring 11. Since a fixed part is provided with no magnetically permeable material, the annular yokes are never attracted locally to the fixed part.
JP7913481A 1981-05-27 1981-05-27 Objective lens driver Granted JPS57195339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7913481A JPS57195339A (en) 1981-05-27 1981-05-27 Objective lens driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7913481A JPS57195339A (en) 1981-05-27 1981-05-27 Objective lens driver

Publications (2)

Publication Number Publication Date
JPS57195339A true JPS57195339A (en) 1982-12-01
JPH0440784B2 JPH0440784B2 (en) 1992-07-06

Family

ID=13681478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7913481A Granted JPS57195339A (en) 1981-05-27 1981-05-27 Objective lens driver

Country Status (1)

Country Link
JP (1) JPS57195339A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133994A2 (en) * 1983-08-03 1985-03-13 Sony Corporation Optical pickup having a driving unit
TR24402A (en) * 1989-07-21 1991-09-01 Thomson Brandt Gmbh FOOT FOR AN OPTICAL ELEMENT
US5056902A (en) * 1990-04-25 1991-10-15 Smith & Nephew Dyonics, Inc. Magnetically coupled lens actuator
US5836867A (en) * 1996-11-27 1998-11-17 Linvatec Corporation Magnetic coupling assembly for endoscope
WO2008053427A1 (en) * 2006-11-02 2008-05-08 Koninklijke Philips Electronics N.V. Actuator assembly and opto-mechanical device comprising an actuator assembly
KR100931451B1 (en) * 2006-10-31 2009-12-11 파나소닉 주식회사 Lens Actuators and Electronic Devices
WO2013007352A1 (en) * 2011-07-11 2013-01-17 Olympus Winter & Ibe Gmbh Contact-free magnetic coupling for an endoscope, and endoscope
US8840543B2 (en) 2011-12-07 2014-09-23 Stryker Corporation Parfocal coupler for endoscopic viewing system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52139312A (en) * 1976-05-17 1977-11-21 Sony Corp Recording/reproducing device
JPS5635890U (en) * 1979-08-27 1981-04-07

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52139683A (en) * 1976-05-18 1977-11-21 Agency Of Ind Science & Technol No# reduction catalyst

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52139312A (en) * 1976-05-17 1977-11-21 Sony Corp Recording/reproducing device
JPS5635890U (en) * 1979-08-27 1981-04-07

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133994A2 (en) * 1983-08-03 1985-03-13 Sony Corporation Optical pickup having a driving unit
TR24402A (en) * 1989-07-21 1991-09-01 Thomson Brandt Gmbh FOOT FOR AN OPTICAL ELEMENT
US5210649A (en) * 1989-07-21 1993-05-11 Deutsche Thomson-Brandt Gmbh Mount for an optical element
US5056902A (en) * 1990-04-25 1991-10-15 Smith & Nephew Dyonics, Inc. Magnetically coupled lens actuator
US5836867A (en) * 1996-11-27 1998-11-17 Linvatec Corporation Magnetic coupling assembly for endoscope
KR100931451B1 (en) * 2006-10-31 2009-12-11 파나소닉 주식회사 Lens Actuators and Electronic Devices
US7751134B2 (en) 2006-10-31 2010-07-06 Panasonic Corporation Lens actuator, and electronic device using the same
WO2008053427A1 (en) * 2006-11-02 2008-05-08 Koninklijke Philips Electronics N.V. Actuator assembly and opto-mechanical device comprising an actuator assembly
WO2013007352A1 (en) * 2011-07-11 2013-01-17 Olympus Winter & Ibe Gmbh Contact-free magnetic coupling for an endoscope, and endoscope
CN103648356A (en) * 2011-07-11 2014-03-19 奥林匹斯冬季和Ibe有限公司 Contact-free magnetic coupling for an endoscope, and endoscope
US8840543B2 (en) 2011-12-07 2014-09-23 Stryker Corporation Parfocal coupler for endoscopic viewing system

Also Published As

Publication number Publication date
JPH0440784B2 (en) 1992-07-06

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