JPS5589922A - Information recorder - Google Patents

Information recorder

Info

Publication number
JPS5589922A
JPS5589922A JP15984178A JP15984178A JPS5589922A JP S5589922 A JPS5589922 A JP S5589922A JP 15984178 A JP15984178 A JP 15984178A JP 15984178 A JP15984178 A JP 15984178A JP S5589922 A JPS5589922 A JP S5589922A
Authority
JP
Japan
Prior art keywords
focus
disc
automatic focus
output
light detector
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
JP15984178A
Other languages
English (en)
Other versions
JPS606015B2 (ja
Inventor
Kazuo Shigematsu
Masahiro Oshima
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 JP53159841A priority Critical patent/JPS606015B2/ja
Publication of JPS5589922A publication Critical patent/JPS5589922A/ja
Publication of JPS606015B2 publication Critical patent/JPS606015B2/ja
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
    • G11B7/0908—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 for focusing only

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP53159841A 1978-12-27 1978-12-27 情報記録装置 Expired JPS606015B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53159841A JPS606015B2 (ja) 1978-12-27 1978-12-27 情報記録装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53159841A JPS606015B2 (ja) 1978-12-27 1978-12-27 情報記録装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP12172784A Division JPS6035340A (ja) 1984-06-15 1984-06-15 光学的記録装置

Publications (2)

Publication Number Publication Date
JPS5589922A true JPS5589922A (en) 1980-07-08
JPS606015B2 JPS606015B2 (ja) 1985-02-15

Family

ID=15702398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53159841A Expired JPS606015B2 (ja) 1978-12-27 1978-12-27 情報記録装置

Country Status (1)

Country Link
JP (1) JPS606015B2 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH044089Y2 (ja) * 1985-05-11 1992-02-06

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50136051A (ja) * 1974-04-15 1975-10-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50136051A (ja) * 1974-04-15 1975-10-28

Also Published As

Publication number Publication date
JPS606015B2 (ja) 1985-02-15

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