JPH0320819B2 - - Google Patents

Info

Publication number
JPH0320819B2
JPH0320819B2 JP56210518A JP21051881A JPH0320819B2 JP H0320819 B2 JPH0320819 B2 JP H0320819B2 JP 56210518 A JP56210518 A JP 56210518A JP 21051881 A JP21051881 A JP 21051881A JP H0320819 B2 JPH0320819 B2 JP H0320819B2
Authority
JP
Japan
Prior art keywords
lens
focusing
recording medium
optical
optical head
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
JP56210518A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58114334A (ja
Inventor
Toshitaka Iwamoto
Akio Nimata
Yasuyuki Ozawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP21051881A priority Critical patent/JPS58114334A/ja
Publication of JPS58114334A publication Critical patent/JPS58114334A/ja
Publication of JPH0320819B2 publication Critical patent/JPH0320819B2/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

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP21051881A 1981-12-26 1981-12-26 光学ヘツド Granted JPS58114334A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21051881A JPS58114334A (ja) 1981-12-26 1981-12-26 光学ヘツド

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21051881A JPS58114334A (ja) 1981-12-26 1981-12-26 光学ヘツド

Publications (2)

Publication Number Publication Date
JPS58114334A JPS58114334A (ja) 1983-07-07
JPH0320819B2 true JPH0320819B2 (en:Method) 1991-03-20

Family

ID=16590690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21051881A Granted JPS58114334A (ja) 1981-12-26 1981-12-26 光学ヘツド

Country Status (1)

Country Link
JP (1) JPS58114334A (en:Method)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0594628A (ja) * 1991-04-30 1993-04-16 Fuji Xerox Co Ltd 光学的記録再生装置
US5253245A (en) * 1992-01-21 1993-10-12 International Business Machines Corporation Optical data storage tracking system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL171641C (nl) * 1974-02-13 1983-04-18 Philips Nv Inrichting voor het uitlezen van een registratiedrager waarop informatie is aangebracht in een optisch uitleesbare structuur.

Also Published As

Publication number Publication date
JPS58114334A (ja) 1983-07-07

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