FR2425782B1 - OPTICAL INFORMATION READING APPARATUS - Google Patents

OPTICAL INFORMATION READING APPARATUS

Info

Publication number
FR2425782B1
FR2425782B1 FR7911773A FR7911773A FR2425782B1 FR 2425782 B1 FR2425782 B1 FR 2425782B1 FR 7911773 A FR7911773 A FR 7911773A FR 7911773 A FR7911773 A FR 7911773A FR 2425782 B1 FR2425782 B1 FR 2425782B1
Authority
FR
France
Prior art keywords
optical information
reading apparatus
information reading
optical
reading
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.)
Expired
Application number
FR7911773A
Other languages
French (fr)
Other versions
FR2425782A1 (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 JP5436678A external-priority patent/JPS54146611A/en
Priority claimed from JP5436778A external-priority patent/JPS54146612A/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
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
JP5436678A JPS54146611A (en) 1978-05-10 1978-05-10 Objective lens driving gear
JP5436778A JPS54146612A (en) 1978-05-10 1978-05-10 Optical information read device
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 FR2425782A1 (en) 1979-12-07
FR2425782B1 true 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)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052829B (en) * 1979-04-27 1983-01-12 Olympus Optical Co Apparatus for driving objective lens in tracking direction
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
GB2088646B (en) * 1980-10-24 1984-09-12 Sony Corp Pick-up assemblies for disc players
JPS5848033U (en) * 1981-09-22 1983-03-31 萬世工業株式会社 lens drive device
US4553227A (en) * 1982-04-23 1985-11-12 Tokyo Shibaura Denki Kabushiki Kaisha Optical pickup
US4658390A (en) * 1983-04-18 1987-04-14 Sharp Kabushiki Kaisha Optical focus position control in an optical memory system
DE3500671A1 (en) * 1985-01-11 1986-07-17 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen READING DEVICE FOR OPTICAL SCANING OF INFORMATION RECORDED ON A MOVABLE DISK-SHAPED CARRIER

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530258A (en) * 1968-06-28 1970-09-22 Mca Technology Inc Video signal transducer having servo controlled flexible fiber optic track centering
FR2174353A5 (en) * 1972-02-29 1973-10-12 Thomson Csf
US3932700A (en) * 1974-02-04 1976-01-13 Zenith Radio Corporation Focus tracking registration for optical reproducing systems
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
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
NL178915C (en) * 1976-01-16 1986-06-02 Philips Nv AUTOMATIC OPTIC FOCUSING SYSTEM.
NL176315C (en) * 1976-05-12 1985-03-18 Philips Nv OPTICAL SCANNER.
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

Also Published As

Publication number Publication date
FR2425782A1 (en) 1979-12-07

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Legal Events

Date Code Title Description
ST Notification of lapse