JPS56163530A - Optical recorder and reproducer - Google Patents

Optical recorder and reproducer

Info

Publication number
JPS56163530A
JPS56163530A JP6833980A JP6833980A JPS56163530A JP S56163530 A JPS56163530 A JP S56163530A JP 6833980 A JP6833980 A JP 6833980A JP 6833980 A JP6833980 A JP 6833980A JP S56163530 A JPS56163530 A JP S56163530A
Authority
JP
Japan
Prior art keywords
piezoelectric element
flexion
inverted
objective lens
axis
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
JP6833980A
Other languages
Japanese (ja)
Other versions
JPS6260733B2 (en
Inventor
Kanji Nishii
Yoshikazu Goto
Shunji Harikae
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6833980A priority Critical patent/JPS56163530A/en
Publication of JPS56163530A publication Critical patent/JPS56163530A/en
Publication of JPS6260733B2 publication Critical patent/JPS6260733B2/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
    • G11B7/0937—Piezo-electric actuators

Abstract

PURPOSE:To vary the converging position of the laser beam to the radius direction or the direction of tangential line of a recording track for a controller for light converging position, by adding an objective lens at an end of a flection-type piezoelectric element. CONSTITUTION:Figures 15 and 15' show the baring parts, and the outer circumference part of a bearing 17 having a shaft-shaped member 16 in its inside is adhered to an end of flexion-type piezoelectric elements 7 and 7' each. Both the tracking and time axis compensations can be performed by giving a flexion to the elements 7 and 7'. A piezoelectric element 18 is constituted so that the flexing direction is inverted at the middle point Q in the lengthwise direction of the piezoelectric element. With application of an electric field, the flexing direction is inverted at the point Q. Thus an objective lens 2 is shifted to a position 2' perpendicular to an optical axis 5. No consideration is required for an effect of coma aberration since the lens 2 has no inclination at all to the axis 5.
JP6833980A 1980-05-21 1980-05-21 Optical recorder and reproducer Granted JPS56163530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6833980A JPS56163530A (en) 1980-05-21 1980-05-21 Optical recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6833980A JPS56163530A (en) 1980-05-21 1980-05-21 Optical recorder and reproducer

Publications (2)

Publication Number Publication Date
JPS56163530A true JPS56163530A (en) 1981-12-16
JPS6260733B2 JPS6260733B2 (en) 1987-12-17

Family

ID=13370978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6833980A Granted JPS56163530A (en) 1980-05-21 1980-05-21 Optical recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS56163530A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6241662U (en) * 1985-08-30 1987-03-12

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48101103A (en) * 1972-02-29 1973-12-20
JPS54155802A (en) * 1978-05-30 1979-12-08 Olympus Optical Co Ltd Objective lens driving device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48101103A (en) * 1972-02-29 1973-12-20
JPS54155802A (en) * 1978-05-30 1979-12-08 Olympus Optical Co Ltd Objective lens driving device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6241662U (en) * 1985-08-30 1987-03-12

Also Published As

Publication number Publication date
JPS6260733B2 (en) 1987-12-17

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