JPS60129934A - 光学式デイスクプレ−ヤ−のフオ−カス装置 - Google Patents

光学式デイスクプレ−ヤ−のフオ−カス装置

Info

Publication number
JPS60129934A
JPS60129934A JP23843683A JP23843683A JPS60129934A JP S60129934 A JPS60129934 A JP S60129934A JP 23843683 A JP23843683 A JP 23843683A JP 23843683 A JP23843683 A JP 23843683A JP S60129934 A JPS60129934 A JP S60129934A
Authority
JP
Japan
Prior art keywords
focus
signal
objective lens
circuit
light
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
JP23843683A
Other languages
English (en)
Japanese (ja)
Other versions
JPH053661B2 (enExample
Inventor
Kazuhiko Fujiie
和彦 藤家
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP23843683A priority Critical patent/JPS60129934A/ja
Publication of JPS60129934A publication Critical patent/JPS60129934A/ja
Publication of JPH053661B2 publication Critical patent/JPH053661B2/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
    • G11B7/0908—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 for focusing only

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)
JP23843683A 1983-12-17 1983-12-17 光学式デイスクプレ−ヤ−のフオ−カス装置 Granted JPS60129934A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23843683A JPS60129934A (ja) 1983-12-17 1983-12-17 光学式デイスクプレ−ヤ−のフオ−カス装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23843683A JPS60129934A (ja) 1983-12-17 1983-12-17 光学式デイスクプレ−ヤ−のフオ−カス装置

Publications (2)

Publication Number Publication Date
JPS60129934A true JPS60129934A (ja) 1985-07-11
JPH053661B2 JPH053661B2 (enExample) 1993-01-18

Family

ID=17030186

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23843683A Granted JPS60129934A (ja) 1983-12-17 1983-12-17 光学式デイスクプレ−ヤ−のフオ−カス装置

Country Status (1)

Country Link
JP (1) JPS60129934A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005055213A1 (ja) * 2003-12-01 2005-06-16 Matsushita Electric Industrial Co., Ltd. 制御装置および制御装置を備えた光ディスク装置
EP1426933A3 (en) * 2002-11-26 2007-03-21 Matsushita Electric Industrial Co., Ltd. Optical disc drive

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171034A (ja) * 1983-03-18 1984-09-27 Hitachi Ltd 自動焦点引込み回路

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171034A (ja) * 1983-03-18 1984-09-27 Hitachi Ltd 自動焦点引込み回路

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1426933A3 (en) * 2002-11-26 2007-03-21 Matsushita Electric Industrial Co., Ltd. Optical disc drive
US7440362B2 (en) 2002-11-26 2008-10-21 Matsushita Electric Industrial Co., Ltd. Optical disc drive which uses a train of pulses to shift the focus of a focusing section
WO2005055213A1 (ja) * 2003-12-01 2005-06-16 Matsushita Electric Industrial Co., Ltd. 制御装置および制御装置を備えた光ディスク装置
KR100753717B1 (ko) 2003-12-01 2007-08-30 마츠시타 덴끼 산교 가부시키가이샤 제어 장치 및 제어 장치를 구비한 광 디스크 장치
US7276680B2 (en) 2003-12-01 2007-10-02 Matsushita Electric Industrial Co., Ltd. Control unit and optical disk drive including the control unit
CN100431017C (zh) * 2003-12-01 2008-11-05 松下电器产业株式会社 控制装置及具备控制装置的光盘装置

Also Published As

Publication number Publication date
JPH053661B2 (enExample) 1993-01-18

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