JPS5919246A - 光学式情報読取装置におけるフオ−カスサ−ボ引込装置 - Google Patents

光学式情報読取装置におけるフオ−カスサ−ボ引込装置

Info

Publication number
JPS5919246A
JPS5919246A JP12913882A JP12913882A JPS5919246A JP S5919246 A JPS5919246 A JP S5919246A JP 12913882 A JP12913882 A JP 12913882A JP 12913882 A JP12913882 A JP 12913882A JP S5919246 A JPS5919246 A JP S5919246A
Authority
JP
Japan
Prior art keywords
focus error
focus
variance
error signal
point
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
JP12913882A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0223927B2 (enrdf_load_stackoverflow
Inventor
Ryuichi Naito
隆一 内藤
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 Corp
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 Corp, Pioneer Electronic Corp filed Critical Pioneer 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 true JPS5919246A (ja) 1984-01-31
JPH0223927B2 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)

Cited By (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
JPS63114409U (enrdf_load_stackoverflow) * 1987-01-16 1988-07-23
JPS6442513U (enrdf_load_stackoverflow) * 1987-09-03 1989-03-14

Cited By (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
JPS63114409U (enrdf_load_stackoverflow) * 1987-01-16 1988-07-23
JPS6442513U (enrdf_load_stackoverflow) * 1987-09-03 1989-03-14

Also Published As

Publication number Publication date
JPH0223927B2 (enrdf_load_stackoverflow) 1990-05-25

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