DE69621199T2 - Optischer Wiedergabekopf mit verbesserter Wiedergabe von Medien mit Pits unterschiedlicher Tiefen - Google Patents

Optischer Wiedergabekopf mit verbesserter Wiedergabe von Medien mit Pits unterschiedlicher Tiefen

Info

Publication number
DE69621199T2
DE69621199T2 DE69621199T DE69621199T DE69621199T2 DE 69621199 T2 DE69621199 T2 DE 69621199T2 DE 69621199 T DE69621199 T DE 69621199T DE 69621199 T DE69621199 T DE 69621199T DE 69621199 T2 DE69621199 T2 DE 69621199T2
Authority
DE
Germany
Prior art keywords
playback
pits
media
different depths
improved
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
DE69621199T
Other languages
English (en)
Other versions
DE69621199D1 (de
Inventor
Jun-Ichi Takahashi
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Publication of DE69621199D1 publication Critical patent/DE69621199D1/de
Application granted granted Critical
Publication of DE69621199T2 publication Critical patent/DE69621199T2/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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • G11B7/24088—Pits for storing more than two values, i.e. multi-valued recording for data or prepits
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
DE69621199T 1995-08-15 1996-08-14 Optischer Wiedergabekopf mit verbesserter Wiedergabe von Medien mit Pits unterschiedlicher Tiefen Expired - Fee Related DE69621199T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7208029A JP2751884B2 (ja) 1995-08-15 1995-08-15 光ヘッド装置

Publications (2)

Publication Number Publication Date
DE69621199D1 DE69621199D1 (de) 2002-06-20
DE69621199T2 true DE69621199T2 (de) 2002-09-26

Family

ID=16549500

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69621199T Expired - Fee Related DE69621199T2 (de) 1995-08-15 1996-08-14 Optischer Wiedergabekopf mit verbesserter Wiedergabe von Medien mit Pits unterschiedlicher Tiefen

Country Status (5)

Country Link
US (1) US5838651A (de)
EP (1) EP0762402B1 (de)
JP (1) JP2751884B2 (de)
KR (1) KR100242215B1 (de)
DE (1) DE69621199T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1064651B1 (de) 1998-03-10 2002-07-17 QinetiQ Limited Dreidimensionales bildformungssystem
JPH11272721A (ja) 1998-03-19 1999-10-08 Fujitsu Ltd 干渉チェック結果表示方法および干渉チェック結果表示装置ならびに干渉チェック結果表示プログラムが記録されたコンピュータ読取可能な記録媒体
EP0984440A3 (de) 1998-09-04 2000-05-24 Matsushita Electric Industrial Co., Ltd. Vorrichtung zur Aberrationsdetektion und Gerät zur Aufnahme und Wiedergabe von optischer Information
CA2464808A1 (en) * 2002-02-07 2003-08-14 Verification Technologies, Inc. Method and system for optical disc copy-protection
JP4071141B2 (ja) * 2003-03-31 2008-04-02 シャープ株式会社 半導体レーザ装置および光ピックアップ装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215735A (ja) * 1982-06-07 1983-12-15 Sony Corp 光学式デイスク記録方法
JPS6112974A (ja) * 1984-06-26 1986-01-21 東洋紡績株式会社 連続マルチフイラメントの開繊方法
JPS648514A (en) * 1987-07-01 1989-01-12 Canon Kk Method and device for reproducing optical information and optical information recording medium
JPH0778904B2 (ja) * 1989-01-27 1995-08-23 シャープ株式会社 光ピックアップ装置
JP2687606B2 (ja) * 1989-07-19 1997-12-08 松下電器産業株式会社 光ピックアップ
JPH0492212A (ja) * 1990-08-06 1992-03-25 Olympus Optical Co Ltd 光学式多値記録および再生方式
JP2865223B2 (ja) * 1990-12-28 1999-03-08 松下電子工業株式会社 光ピックアップ用偏光板および光ピックアップ装置
TW218427B (de) * 1991-06-04 1994-01-01 Ibm
JPH056546A (ja) * 1991-06-28 1993-01-14 Casio Comput Co Ltd 情報再生装置及び情報記録再生装置
US5251198A (en) * 1992-05-29 1993-10-05 Strickler James H Reading device for multi-layered optical information carrier
JP3135389B2 (ja) * 1992-10-23 2001-02-13 松下電器産業株式会社 情報再生方法、情報記録再生方法、情報再生装置、記録媒体及び光ヘッド
JPH0778353A (ja) * 1992-11-26 1995-03-20 Matsushita Electric Ind Co Ltd 光ディスクおよび光ディスク装置
JP2532818B2 (ja) * 1993-02-01 1996-09-11 松下電器産業株式会社 対物レンズおよび光ヘッド装置
JP2570563B2 (ja) * 1993-02-16 1997-01-08 日本電気株式会社 光ヘッド装置
JPH06300921A (ja) * 1993-04-16 1994-10-28 Nec Corp ホログラム素子及び光ヘッド装置
US5453969A (en) * 1994-05-04 1995-09-26 California Institute Of Technology Optical memory with pit depth encoding
KR100200837B1 (ko) * 1995-01-24 1999-06-15 윤종용 다층 기록막을 갖는 광디스크를 위한 광픽업
US5526338A (en) * 1995-03-10 1996-06-11 Yeda Research & Development Co. Ltd. Method and apparatus for storage and retrieval with multilayer optical disks

Also Published As

Publication number Publication date
DE69621199D1 (de) 2002-06-20
JPH0954972A (ja) 1997-02-25
US5838651A (en) 1998-11-17
JP2751884B2 (ja) 1998-05-18
EP0762402B1 (de) 2002-05-15
KR100242215B1 (ko) 2000-02-01
EP0762402A1 (de) 1997-03-12
KR970012388A (ko) 1997-03-29

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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