JPH0359491B2 - - Google Patents

Info

Publication number
JPH0359491B2
JPH0359491B2 JP14959682A JP14959682A JPH0359491B2 JP H0359491 B2 JPH0359491 B2 JP H0359491B2 JP 14959682 A JP14959682 A JP 14959682A JP 14959682 A JP14959682 A JP 14959682A JP H0359491 B2 JPH0359491 B2 JP H0359491B2
Authority
JP
Japan
Prior art keywords
signal
focus
circuit
disk
focus pull
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
JP14959682A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5938931A (ja
Inventor
Shuichi Kimura
Akira Katsuyama
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 JP14959682A priority Critical patent/JPS5938931A/ja
Publication of JPS5938931A publication Critical patent/JPS5938931A/ja
Publication of JPH0359491B2 publication Critical patent/JPH0359491B2/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

  • Optical Recording Or Reproduction (AREA)
JP14959682A 1982-08-28 1982-08-28 光学式デイスク再生装置 Granted JPS5938931A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14959682A JPS5938931A (ja) 1982-08-28 1982-08-28 光学式デイスク再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14959682A JPS5938931A (ja) 1982-08-28 1982-08-28 光学式デイスク再生装置

Publications (2)

Publication Number Publication Date
JPS5938931A JPS5938931A (ja) 1984-03-03
JPH0359491B2 true JPH0359491B2 (cs) 1991-09-10

Family

ID=15478658

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14959682A Granted JPS5938931A (ja) 1982-08-28 1982-08-28 光学式デイスク再生装置

Country Status (1)

Country Link
JP (1) JPS5938931A (cs)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62259230A (ja) * 1986-05-06 1987-11-11 Pioneer Electronic Corp 車載用デイスクプレ−ヤ
US5189290A (en) * 1989-10-14 1993-02-23 Omron Corporation Optical card processing apparatus using tracking error signals to determine proper card orientation

Also Published As

Publication number Publication date
JPS5938931A (ja) 1984-03-03

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