JPS63157818U - - Google Patents

Info

Publication number
JPS63157818U
JPS63157818U JP1987049615U JP4961587U JPS63157818U JP S63157818 U JPS63157818 U JP S63157818U JP 1987049615 U JP1987049615 U JP 1987049615U JP 4961587 U JP4961587 U JP 4961587U JP S63157818 U JPS63157818 U JP S63157818U
Authority
JP
Japan
Prior art keywords
magneto
incident
optical
linearly polarized
focus error
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
JP1987049615U
Other languages
English (en)
Japanese (ja)
Other versions
JPH075549Y2 (ja
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 filed Critical
Priority to JP1987049615U priority Critical patent/JPH075549Y2/ja
Priority to KR1019880003469A priority patent/KR880011751A/ko
Publication of JPS63157818U publication Critical patent/JPS63157818U/ja
Application granted granted Critical
Publication of JPH075549Y2 publication Critical patent/JPH075549Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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

  • Optical Recording Or Reproduction (AREA)
JP1987049615U 1987-03-31 1987-03-31 光磁気ヘツドのフオ−カスエラ−検出装置 Expired - Lifetime JPH075549Y2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1987049615U JPH075549Y2 (ja) 1987-03-31 1987-03-31 光磁気ヘツドのフオ−カスエラ−検出装置
KR1019880003469A KR880011751A (ko) 1987-03-31 1988-03-30 광자기 헤드의 촛점 에러 검출 장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987049615U JPH075549Y2 (ja) 1987-03-31 1987-03-31 光磁気ヘツドのフオ−カスエラ−検出装置

Publications (2)

Publication Number Publication Date
JPS63157818U true JPS63157818U (US07321065-20080122-C00160.png) 1988-10-17
JPH075549Y2 JPH075549Y2 (ja) 1995-02-08

Family

ID=30872231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987049615U Expired - Lifetime JPH075549Y2 (ja) 1987-03-31 1987-03-31 光磁気ヘツドのフオ−カスエラ−検出装置

Country Status (2)

Country Link
JP (1) JPH075549Y2 (US07321065-20080122-C00160.png)
KR (1) KR880011751A (US07321065-20080122-C00160.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04177623A (ja) * 1990-11-09 1992-06-24 Nec Corp 光学式情報記録再生装置
JPH04205731A (ja) * 1990-11-29 1992-07-27 Nec Corp 光ヘッド装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04177623A (ja) * 1990-11-09 1992-06-24 Nec Corp 光学式情報記録再生装置
JPH04205731A (ja) * 1990-11-29 1992-07-27 Nec Corp 光ヘッド装置

Also Published As

Publication number Publication date
JPH075549Y2 (ja) 1995-02-08
KR880011751A (ko) 1988-10-31

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