JPS51136229A - Information reproducing - Google Patents

Information reproducing

Info

Publication number
JPS51136229A
JPS51136229A JP50059700A JP5970075A JPS51136229A JP S51136229 A JPS51136229 A JP S51136229A JP 50059700 A JP50059700 A JP 50059700A JP 5970075 A JP5970075 A JP 5970075A JP S51136229 A JPS51136229 A JP S51136229A
Authority
JP
Japan
Prior art keywords
information reproducing
detectors
thocking
shote
output signal
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
JP50059700A
Other languages
Japanese (ja)
Other versions
JPS5911973B2 (en
Inventor
Yoshito Tsunoda
Takeshi Maeda
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 JP50059700A priority Critical patent/JPS5911973B2/en
Publication of JPS51136229A publication Critical patent/JPS51136229A/en
Publication of JPS5911973B2 publication Critical patent/JPS5911973B2/en
Priority to JP18185A priority patent/JPS60167134A/en
Expired 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

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:By providing at least two shote-detectors in laser light beam, thocking and automatic focal point adjusting are to be performed according to the output signal from the detectors.
JP50059700A 1975-05-21 1975-05-21 Information reproduction method Expired JPS5911973B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP50059700A JPS5911973B2 (en) 1975-05-21 1975-05-21 Information reproduction method
JP18185A JPS60167134A (en) 1975-05-21 1985-01-07 Information reproducing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50059700A JPS5911973B2 (en) 1975-05-21 1975-05-21 Information reproduction method

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP18185A Division JPS60167134A (en) 1975-05-21 1985-01-07 Information reproducing system

Publications (2)

Publication Number Publication Date
JPS51136229A true JPS51136229A (en) 1976-11-25
JPS5911973B2 JPS5911973B2 (en) 1984-03-19

Family

ID=13120740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50059700A Expired JPS5911973B2 (en) 1975-05-21 1975-05-21 Information reproduction method

Country Status (1)

Country Link
JP (1) JPS5911973B2 (en)

Also Published As

Publication number Publication date
JPS5911973B2 (en) 1984-03-19

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