WO2009034711A1 - 光再生方法、光再生システム - Google Patents

光再生方法、光再生システム Download PDF

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Publication number
WO2009034711A1
WO2009034711A1 PCT/JP2008/002511 JP2008002511W WO2009034711A1 WO 2009034711 A1 WO2009034711 A1 WO 2009034711A1 JP 2008002511 W JP2008002511 W JP 2008002511W WO 2009034711 A1 WO2009034711 A1 WO 2009034711A1
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WO
WIPO (PCT)
Prior art keywords
optical reproduction
recording
information
objective lens
identification method
Prior art date
Application number
PCT/JP2008/002511
Other languages
English (en)
French (fr)
Inventor
Takashi Kikukawa
Kazushi Tanaka
Original Assignee
Tdk Corporation
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 Tdk Corporation filed Critical Tdk Corporation
Publication of WO2009034711A1 publication Critical patent/WO2009034711A1/ja

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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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • G11B20/10101—PR2 or PR(1,2,1), i.e. partial response class 2, polynomial (1+D)2=1+2D+D2
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • G11B20/10111—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom partial response PR(1,2,2,1)
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • G11B20/1012—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom partial response PR(1,2,2,2,1)
    • 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
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • G11B2007/24302—Metals or metalloids
    • G11B2007/24312—Metals or metalloids group 14 elements (e.g. Si, Ge, Sn)
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • G11B2007/24302—Metals or metalloids
    • G11B2007/24314—Metals or metalloids group 15 elements (e.g. Sb, Bi)
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • G11B2007/24318—Non-metallic elements
    • G11B2007/2432—Oxygen

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Algebra (AREA)
  • Pure & Applied Mathematics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

　光入射面から情報記録層までの距離が１００μｍ未満となる光記録媒体に対して、対物レンズを介してレーザー光を照射し、ＰＲＭＬ識別方式によって情報記録層の情報を再生する。この際、レーザー光の波長をλ、対物レンズの開口数をＮＡ、記録時の光記録媒体の線速をＬＶ、記録時のチャネルビット周波数をｆとした場合に、ＰＲＭＬ識別方式の拘束長ｎが、０．５×（λ／ＮＡ）／（ＬＶ／ｆ）－１＜ｎ＜０．５×（λ／ＮＡ）／（ＬＶ／ｆ）＋１を満たす整数に設定した。このようにすると、線記録密度を増大させながらも、再生信号品質を向上させることができる。
PCT/JP2008/002511 2007-09-12 2008-09-11 光再生方法、光再生システム WO2009034711A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007236269A JP5167735B2 (ja) 2007-09-12 2007-09-12 光再生方法、光再生システム
JP2007-236269 2007-09-12

Publications (1)

Publication Number Publication Date
WO2009034711A1 true WO2009034711A1 (ja) 2009-03-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/002511 WO2009034711A1 (ja) 2007-09-12 2008-09-11 光再生方法、光再生システム

Country Status (3)

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US (1) US8339918B2 (ja)
JP (1) JP5167735B2 (ja)
WO (1) WO2009034711A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012164372A (ja) * 2011-02-03 2012-08-30 Sony Corp 光情報記録媒体の製造方法および光情報記録媒体

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006120233A (ja) * 2004-10-21 2006-05-11 Hitachi Ltd 光ディスク装置
JP2007128590A (ja) * 2005-11-02 2007-05-24 Nec Corp 光ディスク装置における評価、調整方法、及び光ディスク装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2284590C2 (ru) * 2002-06-05 2006-09-27 Эл Джи Электроникс Инк. Двухслойный оптический диск с высокой плотностью записи
JP4154608B2 (ja) * 2004-05-27 2008-09-24 日本電気株式会社 情報記録媒体への記録方法及び情報記録再生装置並びに情報記録媒体
JP2008027481A (ja) * 2006-07-18 2008-02-07 Toshiba Corp 情報記録媒体、情報記録再生装置、情報記録媒体の検査方法、及び情報記録媒体の検査装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006120233A (ja) * 2004-10-21 2006-05-11 Hitachi Ltd 光ディスク装置
JP2007128590A (ja) * 2005-11-02 2007-05-24 Nec Corp 光ディスク装置における評価、調整方法、及び光ディスク装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HAYASHI,TETSUYA ET AL.: "New equalizer optimization method for partial response maximum likelihood systems using normal equation with sequenced amplitude margin", JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 44, no. 5B, 30 May 2005 (2005-05-30), pages 3477 - 3481 *
HIROSHI OGAWA,SHIN`ICHI TANAKA: "Zukai Blu-ray Disc tokuhon (first edition)", 10 December 2006, OHMSHA LTD., pages: 28,29 *

Also Published As

Publication number Publication date
US8339918B2 (en) 2012-12-25
US20090067314A1 (en) 2009-03-12
JP5167735B2 (ja) 2013-03-21
JP2009070455A (ja) 2009-04-02

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