JPS6249657B2 - - Google Patents

Info

Publication number
JPS6249657B2
JPS6249657B2 JP867978A JP867978A JPS6249657B2 JP S6249657 B2 JPS6249657 B2 JP S6249657B2 JP 867978 A JP867978 A JP 867978A JP 867978 A JP867978 A JP 867978A JP S6249657 B2 JPS6249657 B2 JP S6249657B2
Authority
JP
Japan
Prior art keywords
signal
recording
disk
photodetector
recording material
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
JP867978A
Other languages
English (en)
Japanese (ja)
Other versions
JPS54102109A (en
Inventor
Akira Ichinose
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP867978A priority Critical patent/JPS54102109A/ja
Publication of JPS54102109A publication Critical patent/JPS54102109A/ja
Publication of JPS6249657B2 publication Critical patent/JPS6249657B2/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
    • G11B7/0908—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

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
JP867978A 1978-01-27 1978-01-27 Focusing method of optical recorder Granted JPS54102109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP867978A JPS54102109A (en) 1978-01-27 1978-01-27 Focusing method of optical recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP867978A JPS54102109A (en) 1978-01-27 1978-01-27 Focusing method of optical recorder

Publications (2)

Publication Number Publication Date
JPS54102109A JPS54102109A (en) 1979-08-11
JPS6249657B2 true JPS6249657B2 (en]) 1987-10-20

Family

ID=11699606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP867978A Granted JPS54102109A (en) 1978-01-27 1978-01-27 Focusing method of optical recorder

Country Status (1)

Country Link
JP (1) JPS54102109A (en])

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5914137A (ja) * 1982-07-15 1984-01-25 Matsushita Electric Ind Co Ltd 光学式記録再生装置
JP2552109B2 (ja) * 1985-11-08 1996-11-06 セイコーエプソン株式会社 光記録再生装置
JP2674552B2 (ja) * 1995-03-29 1997-11-12 セイコーエプソン株式会社 光記録再生装置

Also Published As

Publication number Publication date
JPS54102109A (en) 1979-08-11

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