JPH0542737B2 - - Google Patents

Info

Publication number
JPH0542737B2
JPH0542737B2 JP59151215A JP15121584A JPH0542737B2 JP H0542737 B2 JPH0542737 B2 JP H0542737B2 JP 59151215 A JP59151215 A JP 59151215A JP 15121584 A JP15121584 A JP 15121584A JP H0542737 B2 JPH0542737 B2 JP H0542737B2
Authority
JP
Japan
Prior art keywords
recording
light receiving
focus
signal
output
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 - Lifetime
Application number
JP59151215A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6132224A (ja
Inventor
Yoshio Miura
Motoyuki Suzuki
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15121584A priority Critical patent/JPS6132224A/ja
Publication of JPS6132224A publication Critical patent/JPS6132224A/ja
Publication of JPH0542737B2 publication Critical patent/JPH0542737B2/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
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • 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

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP15121584A 1984-07-23 1984-07-23 光方式情報記録再生装置 Granted JPS6132224A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15121584A JPS6132224A (ja) 1984-07-23 1984-07-23 光方式情報記録再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15121584A JPS6132224A (ja) 1984-07-23 1984-07-23 光方式情報記録再生装置

Publications (2)

Publication Number Publication Date
JPS6132224A JPS6132224A (ja) 1986-02-14
JPH0542737B2 true JPH0542737B2 (en]) 1993-06-29

Family

ID=15513752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15121584A Granted JPS6132224A (ja) 1984-07-23 1984-07-23 光方式情報記録再生装置

Country Status (1)

Country Link
JP (1) JPS6132224A (en])

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701603A (en) * 1985-10-17 1987-10-20 Optical Disc Corporation Focus control system for optical information recorder or player
JPS6311723U (en]) * 1986-07-01 1988-01-26
JP2860791B2 (ja) * 1988-08-26 1999-02-24 三菱電機株式会社 フォーカスサーボ回路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032264B2 (ja) * 1977-03-08 1985-07-26 松下電器産業株式会社 光学的再生装置
JPS5894138A (ja) * 1981-11-30 1983-06-04 Hitachi Ltd 光スポツト位置決め制御装置

Also Published As

Publication number Publication date
JPS6132224A (ja) 1986-02-14

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