KR880011751A - 광자기 헤드의 촛점 에러 검출 장치 - Google Patents

광자기 헤드의 촛점 에러 검출 장치 Download PDF

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Publication number
KR880011751A
KR880011751A KR1019880003469A KR880003469A KR880011751A KR 880011751 A KR880011751 A KR 880011751A KR 1019880003469 A KR1019880003469 A KR 1019880003469A KR 880003469 A KR880003469 A KR 880003469A KR 880011751 A KR880011751 A KR 880011751A
Authority
KR
South Korea
Prior art keywords
magneto
focus error
error detection
incident
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.)
Ceased
Application number
KR1019880003469A
Other languages
English (en)
Korean (ko)
Inventor
아쯔시 후꾸모또
기요시 오사또
미찌오 오까
Original Assignee
오오가 노리오
소니 가부시끼 가이샤
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 오오가 노리오, 소니 가부시끼 가이샤 filed Critical 오오가 노리오
Publication of KR880011751A publication Critical patent/KR880011751A/ko
Ceased 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
KR1019880003469A 1987-03-31 1988-03-30 광자기 헤드의 촛점 에러 검출 장치 Ceased KR880011751A (ko)

Applications Claiming Priority (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
JP49615 1987-03-31

Publications (1)

Publication Number Publication Date
KR880011751A true KR880011751A (ko) 1988-10-31

Family

ID=30872231

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880003469A Ceased KR880011751A (ko) 1987-03-31 1988-03-30 광자기 헤드의 촛점 에러 검출 장치

Country Status (2)

Country Link
JP (1) JPH075549Y2 (enExample)
KR (1) KR880011751A (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2643586B2 (ja) * 1990-11-09 1997-08-20 日本電気株式会社 光学式情報記録再生装置
JP2643595B2 (ja) * 1990-11-29 1997-08-20 日本電気株式会社 光ヘッド装置

Also Published As

Publication number Publication date
JPS63157818U (enExample) 1988-10-17
JPH075549Y2 (ja) 1995-02-08

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Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19880330

PG1501 Laying open of application
A201 Request for examination
PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 19930119

Comment text: Request for Examination of Application

Patent event code: PA02011R01I

Patent event date: 19880330

Comment text: Patent Application

E902 Notification of reason for refusal
PE0902 Notice of grounds for rejection

Comment text: Notification of reason for refusal

Patent event date: 19951218

Patent event code: PE09021S01D

E601 Decision to refuse application
PE0601 Decision on rejection of patent

Patent event date: 19960326

Comment text: Decision to Refuse Application

Patent event code: PE06012S01D

Patent event date: 19951218

Comment text: Notification of reason for refusal

Patent event code: PE06011S01I