JPH0223927B2 - - Google Patents

Info

Publication number
JPH0223927B2
JPH0223927B2 JP12913882A JP12913882A JPH0223927B2 JP H0223927 B2 JPH0223927 B2 JP H0223927B2 JP 12913882 A JP12913882 A JP 12913882A JP 12913882 A JP12913882 A JP 12913882A JP H0223927 B2 JPH0223927 B2 JP H0223927B2
Authority
JP
Japan
Prior art keywords
focus
focus error
point
error signal
loop
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
JP12913882A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5919246A (ja
Inventor
Ryuichi Naito
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 JP12913882A priority Critical patent/JPS5919246A/ja
Publication of JPS5919246A publication Critical patent/JPS5919246A/ja
Publication of JPH0223927B2 publication Critical patent/JPH0223927B2/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
    • G11B7/0945—Methods for initialising servos, start-up sequences

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP12913882A 1982-07-24 1982-07-24 光学式情報読取装置におけるフオ−カスサ−ボ引込装置 Granted JPS5919246A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12913882A JPS5919246A (ja) 1982-07-24 1982-07-24 光学式情報読取装置におけるフオ−カスサ−ボ引込装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12913882A JPS5919246A (ja) 1982-07-24 1982-07-24 光学式情報読取装置におけるフオ−カスサ−ボ引込装置

Publications (2)

Publication Number Publication Date
JPS5919246A JPS5919246A (ja) 1984-01-31
JPH0223927B2 true JPH0223927B2 (enrdf_load_stackoverflow) 1990-05-25

Family

ID=15002052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12913882A Granted JPS5919246A (ja) 1982-07-24 1982-07-24 光学式情報読取装置におけるフオ−カスサ−ボ引込装置

Country Status (1)

Country Link
JP (1) JPS5919246A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61175936A (ja) * 1985-01-29 1986-08-07 Nec Corp 光学式情報記録装置におけるフオーカスサーボ装置
JPH0636495Y2 (ja) * 1987-01-16 1994-09-21 アルパイン株式会社 フォーカスサーボ制御装置
JPH0516651Y2 (enrdf_load_stackoverflow) * 1987-09-03 1993-05-06

Also Published As

Publication number Publication date
JPS5919246A (ja) 1984-01-31

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