JPS54146612A - Optical information read device - Google Patents

Optical information read device

Info

Publication number
JPS54146612A
JPS54146612A JP5436778A JP5436778A JPS54146612A JP S54146612 A JPS54146612 A JP S54146612A JP 5436778 A JP5436778 A JP 5436778A JP 5436778 A JP5436778 A JP 5436778A JP S54146612 A JPS54146612 A JP S54146612A
Authority
JP
Japan
Prior art keywords
plate springs
lens
optical axis
bobbins
objective lens
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
JP5436778A
Other languages
Japanese (ja)
Other versions
JPS6120058B2 (en
Inventor
Takashi Hamaoka
Shunpei Tanaka
Toru Musha
Kenichi Oikami
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 JP5436778A priority Critical patent/JPS54146612A/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 JPS54146612A publication Critical patent/JPS54146612A/en
Publication of JPS6120058B2 publication Critical patent/JPS6120058B2/ja
Priority to FR878706802A priority patent/FR2598546B1/en
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
    • G11B7/09—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

Landscapes

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

Abstract

PURPOSE:To control the motion of an objective lens in the fixed direction at high accuracy, by supplying fixed signals to piezo-electric elements mounted to plate springs holding the objective lens in the fixed direction, elastically and in a movable shape and by utilizing signals obtained from said elements. CONSTITUTION:A cylindrical holding cylinder 20 for an objective lens 5 is made of a magnetic body, and connected to coil bobbins 23 by means of two plate springs 21, 22, which do not bend in the optical axis direction of the lens, and the lens 5 and the bobbins 23 integrally move in relation to focussing. The bobbins 23 are mounted to holding frames 30 for magnets 25 through plate springs with shapes, which are approximately symmetric with respect to an optical axis, such as spidery plate springs 29, and at least one piezo-electric element 31 is installed to the plate springs 29. Thus, the motion of the lens 5 in the fixed direction can be controlled at high accuracy if the deformation of the plate springs 29, electric signals corresponding to the quantity of the movement of the lens 5 in the optical axis direction, is detected, fed to a focussing control circuit and motional feedback controlled.
JP5436778A 1978-05-10 1978-05-10 Optical information read device Granted JPS54146612A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP5436778A JPS54146612A (en) 1978-05-10 1978-05-10 Optical information read device
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
JP5436778A JPS54146612A (en) 1978-05-10 1978-05-10 Optical information read device

Related Child Applications (3)

Application Number Title Priority Date Filing Date
JP15830684A Division JPS60209937A (en) 1984-07-28 1984-07-28 Optical information reader
JP15830784A Division JPS60121542A (en) 1984-07-28 1984-07-28 Optical information reader
JP15830884A Division JPS60121543A (en) 1984-07-28 1984-07-28 Optical information reader

Publications (2)

Publication Number Publication Date
JPS54146612A true JPS54146612A (en) 1979-11-16
JPS6120058B2 JPS6120058B2 (en) 1986-05-20

Family

ID=12968675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5436778A Granted JPS54146612A (en) 1978-05-10 1978-05-10 Optical information read device

Country Status (1)

Country Link
JP (1) JPS54146612A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039836A2 (en) * 1980-05-12 1981-11-18 Northern Telecom Limited A scanning head for an optical disc system
JPS56165938A (en) * 1980-05-23 1981-12-19 Sharp Corp Optical scanner
US4342935A (en) * 1980-04-10 1982-08-03 Discovision Associates Binary piezoelectric drive for lens focusing system
US4367543A (en) * 1979-07-24 1983-01-04 Universal Pioneer Corporation Optical disc player signal reading device with improved drive structure for moving optical pickup in orthogonal directions
JPS5826331A (en) * 1981-08-11 1983-02-16 Nippon Telegr & Teleph Corp <Ntt> Optical head
JPS5860438A (en) * 1981-10-05 1983-04-09 Mitsubishi Electric Corp Condenser lens supporting device
JPS58222449A (en) * 1982-06-18 1983-12-24 Matsushita Electric Ind Co Ltd Actuator of optical disk
US4843600A (en) * 1985-09-13 1989-06-27 Canon Kabushiki Kaisha Recording head for magneto-optical information recording apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48101103A (en) * 1972-02-29 1973-12-20
JPS5161725A (en) * 1974-11-27 1976-05-28 Nippon Musical Instruments Mfg
JPS51114940A (en) * 1975-03-28 1976-10-09 Geometric Data Corp Fine focus adjustment device
JPS5248912A (en) * 1975-10-15 1977-04-19 Philips Nv Mirror device for tracing video disk reproducer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48101103A (en) * 1972-02-29 1973-12-20
JPS5161725A (en) * 1974-11-27 1976-05-28 Nippon Musical Instruments Mfg
JPS51114940A (en) * 1975-03-28 1976-10-09 Geometric Data Corp Fine focus adjustment device
JPS5248912A (en) * 1975-10-15 1977-04-19 Philips Nv Mirror device for tracing video disk reproducer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367543A (en) * 1979-07-24 1983-01-04 Universal Pioneer Corporation Optical disc player signal reading device with improved drive structure for moving optical pickup in orthogonal directions
US4342935A (en) * 1980-04-10 1982-08-03 Discovision Associates Binary piezoelectric drive for lens focusing system
EP0039836A2 (en) * 1980-05-12 1981-11-18 Northern Telecom Limited A scanning head for an optical disc system
EP0039836A3 (en) * 1980-05-12 1982-05-19 Northern Telecom Limited A scanning head for an optical disc system
JPS56165938A (en) * 1980-05-23 1981-12-19 Sharp Corp Optical scanner
JPS6319937B2 (en) * 1980-05-23 1988-04-25 Sharp Kk
JPS5826331A (en) * 1981-08-11 1983-02-16 Nippon Telegr & Teleph Corp <Ntt> Optical head
JPS6215933B2 (en) * 1981-08-11 1987-04-09 Nippon Telegraph & Telephone
JPS5860438A (en) * 1981-10-05 1983-04-09 Mitsubishi Electric Corp Condenser lens supporting device
JPH0429133B2 (en) * 1981-10-05 1992-05-18
JPS58222449A (en) * 1982-06-18 1983-12-24 Matsushita Electric Ind Co Ltd Actuator of optical disk
US4843600A (en) * 1985-09-13 1989-06-27 Canon Kabushiki Kaisha Recording head for magneto-optical information recording apparatus

Also Published As

Publication number Publication date
JPS6120058B2 (en) 1986-05-20

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