JPH0250534B2 - - Google Patents

Info

Publication number
JPH0250534B2
JPH0250534B2 JP160382A JP160382A JPH0250534B2 JP H0250534 B2 JPH0250534 B2 JP H0250534B2 JP 160382 A JP160382 A JP 160382A JP 160382 A JP160382 A JP 160382A JP H0250534 B2 JPH0250534 B2 JP H0250534B2
Authority
JP
Japan
Prior art keywords
light receiving
light
receiving element
focus servo
focus
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
JP160382A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58121135A (ja
Inventor
Yoshuki Tsukai
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP160382A priority Critical patent/JPS58121135A/ja
Publication of JPS58121135A publication Critical patent/JPS58121135A/ja
Publication of JPH0250534B2 publication Critical patent/JPH0250534B2/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

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
JP160382A 1982-01-08 1982-01-08 フオ−カスサ−ボ装置 Granted JPS58121135A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP160382A JPS58121135A (ja) 1982-01-08 1982-01-08 フオ−カスサ−ボ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP160382A JPS58121135A (ja) 1982-01-08 1982-01-08 フオ−カスサ−ボ装置

Publications (2)

Publication Number Publication Date
JPS58121135A JPS58121135A (ja) 1983-07-19
JPH0250534B2 true JPH0250534B2 (zh) 1990-11-02

Family

ID=11506071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP160382A Granted JPS58121135A (ja) 1982-01-08 1982-01-08 フオ−カスサ−ボ装置

Country Status (1)

Country Link
JP (1) JPS58121135A (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193141A (ja) * 1984-03-14 1985-10-01 Mitsubishi Electric Corp 光学的焦点ずれ検出装置
JPH0630158B2 (ja) * 1984-06-15 1994-04-20 松下電器産業株式会社 光学的記録再生装置
JPS61175939A (ja) * 1985-01-29 1986-08-07 Matsushita Electric Ind Co Ltd 焦点検出装置

Also Published As

Publication number Publication date
JPS58121135A (ja) 1983-07-19

Similar Documents

Publication Publication Date Title
KR100231388B1 (ko) 광헤드의 트래킹오차 검출장치(Optical Head Tracking Error Detection Device)
JP2725632B2 (ja) 光ヘッド装置
JPH0743834B2 (ja) 光学走査装置
JP2975395B2 (ja) 光ピックアップ装置
US5144131A (en) Device for optically scanning an information plane detecting border portions of light beam
KR20070068290A (ko) 광픽업 장치 및 광디스크 장치
JPH0250534B2 (zh)
JPS59231736A (ja) フォーカスおよびトラッキング誤差検出装置
US5048000A (en) Optical information reading apparatus comprising a diffraction grating member having first and second portions
JP2711010B2 (ja) 光学ヘッド
JP3127974B2 (ja) 光ピックアップ装置
JP2886353B2 (ja) 光情報記録再生装置
JP3439124B2 (ja) 光学ヘッド装置
JP3583564B2 (ja) 光ピックアップ
JP3087586B2 (ja) 光学ヘッド
JPH04366428A (ja) 光ヘッドおよび光情報記録装置
JPS59231738A (ja) 光ピツクアツプ
JPH0817064A (ja) 光ディスク装置
JP2912052B2 (ja) 焦点検出装置
JPH0478022A (ja) 光ピックアップ装置
JPS5848233A (ja) 光情報読取装置
JPH0210489B2 (zh)
JPH097213A (ja) 光学的情報記録再生装置
JPS63153734A (ja) 光検出器
JPH0573918A (ja) 光学式再生装置