FR2425782A1 - Optical data read=out unit - has objective supported on carrier and projecting light spot from light source onto recording medium - Google Patents

Optical data read=out unit - has objective supported on carrier and projecting light spot from light source onto recording medium

Info

Publication number
FR2425782A1
FR2425782A1 FR7911773A FR7911773A FR2425782A1 FR 2425782 A1 FR2425782 A1 FR 2425782A1 FR 7911773 A FR7911773 A FR 7911773A FR 7911773 A FR7911773 A FR 7911773A FR 2425782 A1 FR2425782 A1 FR 2425782A1
Authority
FR
France
Prior art keywords
carrier
data read
optical data
recording medium
objective
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
FR7911773A
Other languages
French (fr)
Other versions
FR2425782B1 (en
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
Priority claimed from JP5436778A external-priority patent/JPS54146612A/en
Priority claimed from JP5436678A external-priority patent/JPS54146611A/en
Priority claimed from JP6377478A external-priority patent/JPS54155802A/en
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to FR7911773A priority Critical patent/FR2425782B1/en
Publication of FR2425782A1 publication Critical patent/FR2425782A1/en
Application granted granted Critical
Publication of FR2425782B1 publication Critical patent/FR2425782B1/en
Expired 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

  • Optical Recording Or Reproduction (AREA)

Abstract

The optical data read-out device has a focussing and track guide mechanism with a first leaf spring (33) connected at one end to the objective or its carrier (32) and at the other end to a first support. A second leaf spring is connected accordingly to a second support. Both springs (33, 34) are arranged symmetrically to an optical axis of the objective or to a plane through the optical axis and a tract direction. The springs and the objective are positioned between two electromagnettics (43, 43') and one or both of them are of magnetic material.
FR7911773A 1978-05-10 1979-05-09 OPTICAL INFORMATION READING APPARATUS Expired FR2425782B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7911773A FR2425782B1 (en) 1978-05-10 1979-05-09 OPTICAL INFORMATION READING APPARATUS

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP5436778A JPS54146612A (en) 1978-05-10 1978-05-10 Optical information read device
JP5436678A JPS54146611A (en) 1978-05-10 1978-05-10 Objective lens driving gear
JP6377478A JPS54155802A (en) 1978-05-30 1978-05-30 Objective lens driving device
FR7911773A FR2425782B1 (en) 1978-05-10 1979-05-09 OPTICAL INFORMATION READING APPARATUS

Publications (2)

Publication Number Publication Date
FR2425782A1 true FR2425782A1 (en) 1979-12-07
FR2425782B1 FR2425782B1 (en) 1988-02-12

Family

ID=27446394

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7911773A Expired FR2425782B1 (en) 1978-05-10 1979-05-09 OPTICAL INFORMATION READING APPARATUS

Country Status (1)

Country Link
FR (1) FR2425782B1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455331A1 (en) * 1979-04-27 1980-11-21 Olympus Optical Co LENS CONTROL APPARATUS FOR CORRECTING POSITION ERRORS
FR2474740A1 (en) * 1980-01-24 1981-07-31 Thomson Csf MOBILE CREW OF A VIDEODISK RECORDER PLAYER, AND VIDEO DEVICE RECORDER COMPRISING SUCH A CREW
FR2493017A1 (en) * 1980-10-24 1982-04-30 Sony Corp READING KIT FOR AN APPARATUS FOR OPTICALLY READING INFORMATION RECORDED ON A DISK IN THE FORM OF ONE OR MORE TRACKS
FR2513391A1 (en) * 1981-09-22 1983-03-25 Mansei Kogyo Kk FOCUSING LENS OPERATION DEVICE
EP0092997A2 (en) * 1982-04-23 1983-11-02 Kabushiki Kaisha Toshiba An optical pickup
EP0122816A2 (en) * 1983-04-18 1984-10-24 Sharp Kabushiki Kaisha Optical focus position control in an optical memory system
WO1986004178A1 (en) * 1985-01-11 1986-07-17 Deutsche Thomson-Brandt Gmbh Reading device for the optical scanning of information recorded on a movable disc-shaped medium

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2011744A1 (en) * 1968-06-28 1970-03-06 Gauss Electrophysics
FR2174353A5 (en) * 1972-02-29 1973-10-12 Thomson Csf
FR2260162A1 (en) * 1974-02-04 1975-08-29 Thomson Brandt
US3941927A (en) * 1974-11-11 1976-03-02 Battelle Development Corporation Optical fiber deflection device
JPS51114102A (en) * 1975-04-01 1976-10-07 Victor Co Of Japan Ltd Signal reading and control device for disc player
DE2645326A1 (en) * 1975-10-08 1977-04-28 Olympus Optical Co SCANNING HEAD FOR AN OPTICAL READING DEVICE
FR2338543A1 (en) * 1976-01-16 1977-08-12 Philips Nv AUTOMATIC OPTICAL FOCUSING SYSTEM
FR2351468A1 (en) * 1976-05-12 1977-12-09 Philips Nv OPTICAL EXPLORATION DEVICE FOR TRACKS FOR RECORDING INFORMATION
DE2626470A1 (en) * 1976-06-12 1977-12-22 Philips Patentverwaltung Rotating data carrier lens control - has mechanism for stepwise displacement of lens under electronic circuit control

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2011744A1 (en) * 1968-06-28 1970-03-06 Gauss Electrophysics
FR2174353A5 (en) * 1972-02-29 1973-10-12 Thomson Csf
FR2260162A1 (en) * 1974-02-04 1975-08-29 Thomson Brandt
US3941927A (en) * 1974-11-11 1976-03-02 Battelle Development Corporation Optical fiber deflection device
JPS51114102A (en) * 1975-04-01 1976-10-07 Victor Co Of Japan Ltd Signal reading and control device for disc player
DE2645326A1 (en) * 1975-10-08 1977-04-28 Olympus Optical Co SCANNING HEAD FOR AN OPTICAL READING DEVICE
US4092529A (en) * 1975-10-08 1978-05-30 Olympus Optical Company Limited Detecting head for use in an apparatus for reading optically an information recorded on a record carrier as a track or tracks
US4092529B1 (en) * 1975-10-08 1988-01-19
FR2338543A1 (en) * 1976-01-16 1977-08-12 Philips Nv AUTOMATIC OPTICAL FOCUSING SYSTEM
FR2351468A1 (en) * 1976-05-12 1977-12-09 Philips Nv OPTICAL EXPLORATION DEVICE FOR TRACKS FOR RECORDING INFORMATION
DE2626470A1 (en) * 1976-06-12 1977-12-22 Philips Patentverwaltung Rotating data carrier lens control - has mechanism for stepwise displacement of lens under electronic circuit control

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ABJP/77 *
ABJP/78 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455331A1 (en) * 1979-04-27 1980-11-21 Olympus Optical Co LENS CONTROL APPARATUS FOR CORRECTING POSITION ERRORS
FR2474740A1 (en) * 1980-01-24 1981-07-31 Thomson Csf MOBILE CREW OF A VIDEODISK RECORDER PLAYER, AND VIDEO DEVICE RECORDER COMPRISING SUCH A CREW
EP0033047A1 (en) * 1980-01-24 1981-08-05 Thomson-Csf Mobile equipment for a video disc recording scanner and video disc recording scanner comprising such equipment
FR2493017A1 (en) * 1980-10-24 1982-04-30 Sony Corp READING KIT FOR AN APPARATUS FOR OPTICALLY READING INFORMATION RECORDED ON A DISK IN THE FORM OF ONE OR MORE TRACKS
FR2513391A1 (en) * 1981-09-22 1983-03-25 Mansei Kogyo Kk FOCUSING LENS OPERATION DEVICE
EP0092997A2 (en) * 1982-04-23 1983-11-02 Kabushiki Kaisha Toshiba An optical pickup
EP0092997A3 (en) * 1982-04-23 1984-11-14 Kabushiki Kaisha Toshiba An optical pickup
US4553227A (en) * 1982-04-23 1985-11-12 Tokyo Shibaura Denki Kabushiki Kaisha Optical pickup
EP0122816A2 (en) * 1983-04-18 1984-10-24 Sharp Kabushiki Kaisha Optical focus position control in an optical memory system
EP0122816A3 (en) * 1983-04-18 1985-11-27 Sharp Kabushiki Kaisha Optical focus position control in an optical memory system
WO1986004178A1 (en) * 1985-01-11 1986-07-17 Deutsche Thomson-Brandt Gmbh Reading device for the optical scanning of information recorded on a movable disc-shaped medium

Also Published As

Publication number Publication date
FR2425782B1 (en) 1988-02-12

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Legal Events

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