DE3888157D1 - Optischer Kopf und Spurführungsmethode unter Benutzung desselben. - Google Patents

Optischer Kopf und Spurführungsmethode unter Benutzung desselben.

Info

Publication number
DE3888157D1
DE3888157D1 DE88403276T DE3888157T DE3888157D1 DE 3888157 D1 DE3888157 D1 DE 3888157D1 DE 88403276 T DE88403276 T DE 88403276T DE 3888157 T DE3888157 T DE 3888157T DE 3888157 D1 DE3888157 D1 DE 3888157D1
Authority
DE
Germany
Prior art keywords
same
optical head
tracking method
tracking
optical
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 - Fee Related
Application number
DE88403276T
Other languages
English (en)
Other versions
DE3888157T2 (de
Inventor
Masaaki C O Copal Compa Takagi
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.)
Nidec Copal Corp
Original Assignee
Nidec Copal Corp
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 Nidec Copal Corp filed Critical Nidec Copal Corp
Application granted granted Critical
Publication of DE3888157D1 publication Critical patent/DE3888157D1/de
Publication of DE3888157T2 publication Critical patent/DE3888157T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
DE3888157T 1987-12-25 1988-12-21 Optischer Kopf und Spurführungsmethode unter Benutzung desselben. Expired - Fee Related DE3888157T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62327444A JPH01171129A (ja) 1987-12-25 1987-12-25 光学ヘッド及びトラッキング方法

Publications (2)

Publication Number Publication Date
DE3888157D1 true DE3888157D1 (de) 1994-04-07
DE3888157T2 DE3888157T2 (de) 1994-06-01

Family

ID=18199237

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3888157T Expired - Fee Related DE3888157T2 (de) 1987-12-25 1988-12-21 Optischer Kopf und Spurführungsmethode unter Benutzung desselben.

Country Status (4)

Country Link
US (1) US5062096A (de)
EP (1) EP0323320B1 (de)
JP (1) JPH01171129A (de)
DE (1) DE3888157T2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070493A (en) * 1989-05-22 1991-12-03 Hewlett-Packard Company Wedge prism assembly for optical information storage
US5694385A (en) * 1993-09-24 1997-12-02 Ricoh Comany, Ltd. Optical pickup apparatus
KR0167462B1 (ko) * 1995-10-31 1999-04-15 이형도 레이저 스캔닝 유니트의 콜리메이트 렌즈 조립구조
JPH10199005A (ja) * 1996-12-26 1998-07-31 Sony Corp 光学ピックアップ装置
JP3402997B2 (ja) * 1997-03-12 2003-05-06 株式会社リコー 光ピックアップ装置
JP4001196B2 (ja) * 1999-10-12 2007-10-31 パイオニア株式会社 情報記録装置及び情報再生装置
KR100452293B1 (ko) * 2002-01-07 2004-10-08 삼성전기주식회사 광 픽업장치

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2266932B1 (de) * 1973-03-02 1977-09-02 Thomson Brandt
JPH0675297B2 (ja) * 1981-08-28 1994-09-21 株式会社日立製作所 光学的情報記録再生装置
JPS58147823A (ja) * 1982-02-25 1983-09-02 Mitsubishi Electric Corp トラツクずれ検出装置
JPS5958637A (ja) * 1982-09-28 1984-04-04 Sony Corp 光学式再生装置
US4720825A (en) * 1984-02-06 1988-01-19 Asahi Kogaku Kogyo Kabushiki Kaisha Optical data reproducing devices having improved trick play capability
DE3776945D1 (de) * 1986-04-18 1992-04-09 Mitsubishi Electric Corp Optischer kopf.
KR900008380B1 (ko) * 1986-07-01 1990-11-17 미쓰비시덴기 가부시기 가이샤 광학식 헤드장치

Also Published As

Publication number Publication date
DE3888157T2 (de) 1994-06-01
EP0323320A3 (en) 1990-05-30
EP0323320A2 (de) 1989-07-05
US5062096A (en) 1991-10-29
EP0323320B1 (de) 1994-03-02
JPH01171129A (ja) 1989-07-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee