JPS54146611A - Objective lens driving gear - Google Patents

Objective lens driving gear

Info

Publication number
JPS54146611A
JPS54146611A JP5436678A JP5436678A JPS54146611A JP S54146611 A JPS54146611 A JP S54146611A JP 5436678 A JP5436678 A JP 5436678A JP 5436678 A JP5436678 A JP 5436678A JP S54146611 A JPS54146611 A JP S54146611A
Authority
JP
Japan
Prior art keywords
optical axis
springs
lens
tracking
locations
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
JP5436678A
Other languages
Japanese (ja)
Other versions
JPS6243256B2 (en
Inventor
Takashi Hamaoka
Toru Musha
Kenichi Oikami
Shunpei Tanaka
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP5436678A priority Critical patent/JPS54146611A/en
Priority to US06/035,334 priority patent/US4302830A/en
Priority to GB7915290A priority patent/GB2025110B/en
Priority to FR7911773A priority patent/FR2425782B1/en
Priority to DE2954579A priority patent/DE2954579C2/de
Priority to DE19792918919 priority patent/DE2918919A1/en
Publication of JPS54146611A publication Critical patent/JPS54146611A/en
Priority to FR878706802A priority patent/FR2598546B1/en
Publication of JPS6243256B2 publication Critical patent/JPS6243256B2/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
    • 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

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To regulate undesirable motion while miniaturizing and lightening the whole device, by mounting two plate springs bending in the vertical direction to a lens optical axis at locations where the springs are mutually symmetric to the lens optical axis between a lens holding body and another support body, in an automatic focus adjusting device used for a video-disc regenerative apparatus, etc. CONSTITUTION:A cylindrical holding cylinder 22, to which an objective lens 21 is installed, is made of a magnetic body, and connected to a coil-bobbin 25 by means of two plate springs 23, 24 for tracking, which do not bend in the optical axis direction of the lens and are positioned at locations where the springs are mutually symmetric to an optical axis. Two electromagnets 33, 33' are monted to the inner surfaces of the inner cylinder portions 28 of a magnet in facing shapes, and the holding cylinder 22 moves in the B-B' directions vertical to the optical axis because magnetic force acts on the springs 23, 24 and absorbs the springs when letting currents flow to one electromagnet, and is tracking controlled in response to the magnitude of the currents. Thus, undesirable motion is regulated while the whole device can be miniaturized and lightened because the lens moves only in the tracking direction in a surface vertical to the optical axis.
JP5436678A 1978-05-10 1978-05-10 Objective lens driving gear Granted JPS54146611A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP5436678A JPS54146611A (en) 1978-05-10 1978-05-10 Objective lens driving gear
US06/035,334 US4302830A (en) 1978-05-10 1979-05-01 Optical information reading-out apparatus
GB7915290A GB2025110B (en) 1978-05-10 1979-05-02 Optical information reading out apparatus
FR7911773A FR2425782B1 (en) 1978-05-10 1979-05-09 OPTICAL INFORMATION READING APPARATUS
DE2954579A DE2954579C2 (en) 1978-05-10 1979-05-10
DE19792918919 DE2918919A1 (en) 1978-05-10 1979-05-10 DEVICE FOR READING OPTICAL INFORMATION FROM A RECORDING MEDIUM
FR878706802A FR2598546B1 (en) 1978-05-10 1987-05-14 DEVICE FOR DRIVING A LENS OF OPTICAL INFORMATION READING APPARATUS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5436678A JPS54146611A (en) 1978-05-10 1978-05-10 Objective lens driving gear

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP19609985A Division JPS6187230A (en) 1985-09-06 1985-09-06 Objective driving device

Publications (2)

Publication Number Publication Date
JPS54146611A true JPS54146611A (en) 1979-11-16
JPS6243256B2 JPS6243256B2 (en) 1987-09-12

Family

ID=12968646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5436678A Granted JPS54146611A (en) 1978-05-10 1978-05-10 Objective lens driving gear

Country Status (1)

Country Link
JP (1) JPS54146611A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57127934A (en) * 1981-01-30 1982-08-09 Hitachi Ltd Supporter for electromechanical converter
JPS58168021A (en) * 1982-03-29 1983-10-04 Hitachi Ltd Lens holding body
JPS6020325A (en) * 1983-07-14 1985-02-01 Nippon Kogaku Kk <Nikon> Supporting device of optical system
JPS60121543A (en) * 1984-07-28 1985-06-29 Olympus Optical Co Ltd Optical information reader
US4553227A (en) * 1982-04-23 1985-11-12 Tokyo Shibaura Denki Kabushiki Kaisha Optical pickup

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57127934A (en) * 1981-01-30 1982-08-09 Hitachi Ltd Supporter for electromechanical converter
JPS6153773B2 (en) * 1981-01-30 1986-11-19 Hitachi Ltd
JPS58168021A (en) * 1982-03-29 1983-10-04 Hitachi Ltd Lens holding body
JPS6338772B2 (en) * 1982-03-29 1988-08-02 Hitachi Ltd
US4553227A (en) * 1982-04-23 1985-11-12 Tokyo Shibaura Denki Kabushiki Kaisha Optical pickup
JPS6020325A (en) * 1983-07-14 1985-02-01 Nippon Kogaku Kk <Nikon> Supporting device of optical system
JPS60121543A (en) * 1984-07-28 1985-06-29 Olympus Optical Co Ltd Optical information reader

Also Published As

Publication number Publication date
JPS6243256B2 (en) 1987-09-12

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