JPH0320818B2 - - Google Patents

Info

Publication number
JPH0320818B2
JPH0320818B2 JP58122886A JP12288683A JPH0320818B2 JP H0320818 B2 JPH0320818 B2 JP H0320818B2 JP 58122886 A JP58122886 A JP 58122886A JP 12288683 A JP12288683 A JP 12288683A JP H0320818 B2 JPH0320818 B2 JP H0320818B2
Authority
JP
Japan
Prior art keywords
objective lens
signal
recording medium
light source
focus
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
JP58122886A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6015839A (ja
Inventor
Yasuaki Edahiro
Tooru Nakamura
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 JP12288683A priority Critical patent/JPS6015839A/ja
Publication of JPS6015839A publication Critical patent/JPS6015839A/ja
Publication of JPH0320818B2 publication Critical patent/JPH0320818B2/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

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP12288683A 1983-07-05 1983-07-05 光学的記録・再生装置 Granted JPS6015839A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12288683A JPS6015839A (ja) 1983-07-05 1983-07-05 光学的記録・再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12288683A JPS6015839A (ja) 1983-07-05 1983-07-05 光学的記録・再生装置

Publications (2)

Publication Number Publication Date
JPS6015839A JPS6015839A (ja) 1985-01-26
JPH0320818B2 true JPH0320818B2 (enrdf_load_stackoverflow) 1991-03-20

Family

ID=14847065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12288683A Granted JPS6015839A (ja) 1983-07-05 1983-07-05 光学的記録・再生装置

Country Status (1)

Country Link
JP (1) JPS6015839A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61276137A (ja) * 1985-05-30 1986-12-06 Fujitsu Ltd 光学ヘツドアクチユエ−タ
JPS6276033A (ja) * 1985-09-30 1987-04-08 Ricoh Co Ltd 光ピツクアツプ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57191840A (en) * 1981-05-20 1982-11-25 Mitsubishi Electric Corp Track follow-up controller

Also Published As

Publication number Publication date
JPS6015839A (ja) 1985-01-26

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