JPS6350772B2 - - Google Patents

Info

Publication number
JPS6350772B2
JPS6350772B2 JP58243290A JP24329083A JPS6350772B2 JP S6350772 B2 JPS6350772 B2 JP S6350772B2 JP 58243290 A JP58243290 A JP 58243290A JP 24329083 A JP24329083 A JP 24329083A JP S6350772 B2 JPS6350772 B2 JP S6350772B2
Authority
JP
Japan
Prior art keywords
projection lens
information
lens
recording medium
track
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
JP58243290A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59160840A (ja
Inventor
Takayuki Aihara
Kyoshi Hori
Hajime Morokuma
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 JP58243290A priority Critical patent/JPS59160840A/ja
Publication of JPS59160840A publication Critical patent/JPS59160840A/ja
Publication of JPS6350772B2 publication Critical patent/JPS6350772B2/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
    • G11B7/0927—Electromechanical actuators for lens positioning for focusing only

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Head (AREA)
JP58243290A 1983-12-23 1983-12-23 情報検出ヘツド Granted JPS59160840A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58243290A JPS59160840A (ja) 1983-12-23 1983-12-23 情報検出ヘツド

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58243290A JPS59160840A (ja) 1983-12-23 1983-12-23 情報検出ヘツド

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP50130528A Division JPS5811692B2 (ja) 1975-10-08 1975-10-31 ジヨウホウヨミトリソウチニオケル ジヨウホウケンシユツヘツド

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP11405887A Division JPS63827A (ja) 1987-05-11 1987-05-11 対物レンズ支持装置

Publications (2)

Publication Number Publication Date
JPS59160840A JPS59160840A (ja) 1984-09-11
JPS6350772B2 true JPS6350772B2 (enrdf_load_stackoverflow) 1988-10-11

Family

ID=17101641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58243290A Granted JPS59160840A (ja) 1983-12-23 1983-12-23 情報検出ヘツド

Country Status (1)

Country Link
JP (1) JPS59160840A (enrdf_load_stackoverflow)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5811692B2 (ja) * 1975-10-31 1983-03-04 オリンパス光学工業株式会社 ジヨウホウヨミトリソウチニオケル ジヨウホウケンシユツヘツド

Also Published As

Publication number Publication date
JPS59160840A (ja) 1984-09-11

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