JPS58143439A - 光学ヘツド - Google Patents

光学ヘツド

Info

Publication number
JPS58143439A
JPS58143439A JP2615682A JP2615682A JPS58143439A JP S58143439 A JPS58143439 A JP S58143439A JP 2615682 A JP2615682 A JP 2615682A JP 2615682 A JP2615682 A JP 2615682A JP S58143439 A JPS58143439 A JP S58143439A
Authority
JP
Japan
Prior art keywords
focus
magnetic circuit
track
optical
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
JP2615682A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6356611B2 (enrdf_load_stackoverflow
Inventor
Kikuji Kato
加藤　喜久次
Akinori Watabe
昭憲 渡部
Hiroo Ukita
宏生 浮田
Susumu Yonezawa
米沢　進
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2615682A priority Critical patent/JPS58143439A/ja
Priority to US06/468,680 priority patent/US4571715A/en
Publication of JPS58143439A publication Critical patent/JPS58143439A/ja
Publication of JPS6356611B2 publication Critical patent/JPS6356611B2/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
    • G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
    • 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
    • G11B7/0932—Details of sprung supports

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP2615682A 1982-02-22 1982-02-22 光学ヘツド Granted JPS58143439A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2615682A JPS58143439A (ja) 1982-02-22 1982-02-22 光学ヘツド
US06/468,680 US4571715A (en) 1982-02-22 1983-02-22 Optical head movable in a tracking direction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2615682A JPS58143439A (ja) 1982-02-22 1982-02-22 光学ヘツド

Publications (2)

Publication Number Publication Date
JPS58143439A true JPS58143439A (ja) 1983-08-26
JPS6356611B2 JPS6356611B2 (enrdf_load_stackoverflow) 1988-11-08

Family

ID=12185675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2615682A Granted JPS58143439A (ja) 1982-02-22 1982-02-22 光学ヘツド

Country Status (1)

Country Link
JP (1) JPS58143439A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155023U (ja) * 1984-03-26 1985-10-16 アルプス電気株式会社 光学式ピツクアツプ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5630439U (enrdf_load_stackoverflow) * 1979-08-06 1981-03-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5630439U (enrdf_load_stackoverflow) * 1979-08-06 1981-03-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155023U (ja) * 1984-03-26 1985-10-16 アルプス電気株式会社 光学式ピツクアツプ

Also Published As

Publication number Publication date
JPS6356611B2 (enrdf_load_stackoverflow) 1988-11-08

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