JP4685754B2 - トラッキング方法 - Google Patents
トラッキング方法 Download PDFInfo
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- JP4685754B2 JP4685754B2 JP2006356034A JP2006356034A JP4685754B2 JP 4685754 B2 JP4685754 B2 JP 4685754B2 JP 2006356034 A JP2006356034 A JP 2006356034A JP 2006356034 A JP2006356034 A JP 2006356034A JP 4685754 B2 JP4685754 B2 JP 4685754B2
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- Prior art keywords
- data
- track
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- 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.)
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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
- G11B7/24—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
- G11B7/2437—Non-metallic elements
-
- 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
- G11B7/0901—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 for track following only
- G11B7/0903—Multi-beam tracking systems
-
- 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
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24065—Layers assisting in recording or reproduction below the optical diffraction limit, e.g. non-linear optical layers or structures
-
- 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
- G11B7/24073—Tracks
- G11B7/24079—Width or depth
-
- 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
- G11B2007/24308—Metals or metalloids transition metal elements of group 11 (Cu, Ag, Au)
-
- 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
- G11B2007/2431—Metals or metalloids group 13 elements (B, Al, Ga, In)
-
- 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
- G11B2007/24302—Metals or metalloids
- G11B2007/24316—Metals or metalloids group 16 elements (i.e. chalcogenides, Se, Te)
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
3次元ピット選択方式ディスクでは,ピットに埋め込まれた相変化記録膜の溶融時の光学特性変化を利用して光学分解能より小さなマークを超解像再生する。一方,光学分解能よりも大きなマークがあると,通常の光ディスクと同様の信号が得られる。以下,これらを超解像再生及び常解像再生とよぶことにする。データトラックを狭トラック化した場合,再生中のトラックは光エネルギーが強く超解像再生をしているが,隣接トラックでは光エネルギーが弱いため,常解像再生状態にある。隣接データトラックの常解像再生信号はクロストークとして当該トラックの超解像再生信号に漏れ込むため,これが大きいと再生信号品質が劣化してしまう。この問題を解決するには常解像再生信号をできるだけ小さく,好ましくはゼロにすればよい。常解像再生信号を小さくして超解像再生信号へのクロストークを低減する技術のことを,以下では常解像キャンセル技術と呼ぶ。
CMP加工を前提として具体的なディスクの構成を考える。CMP加工を施すとディスク表面を平坦に加工することができる。前述のように常解像キャンセル構造を用いればデータトラックを高密度化可能である。トラック案内溝に関しては,十分な大きさのプッシュプル信号が得られるようにすればよいが,トラック案内溝の中に超解像応答をする相変化記録膜があると,常解像キャンセル効果によってプッシュプル信号自体も小さくなることが課題となる。
図1は,本発明による光ディスク媒体のトラック構成例を示す図である。案内溝の間に複数の超解像データトラックを形成することによって,安定なトラッキング制御とデータトラックの高密度化を実現することができる。層変化記録膜はデータトラックのマーク部分にのみ埋め込まれており,案内溝の中には超解像応答をする層変化記録膜は存在しない。なお,データトラックへの高速アクセスや記録型ディスク媒体への拡張を考えた場合,案内溝を半径方向にウォブリングさせてクロック信号やアドレスデータを埋め込むことができる。これに対応する光ディスク装置の構成については後述する。
101 光スポット
110 光ヘッド
111 対物レンズ
112 半導体レーザ
113 光検出器
114 レーザ光
115 反射光
116 レーザドライバ
120 レーザパワー/パルス制御器
130 再生信号処理器
140 CPU
160 スピンドルモータ
Claims (3)
- トラック案内溝と,隣接する2つのトラック案内溝の間の領域に設けられたデータトラックとを有し,前記データトラックにはデータピットが形成され,前記データピット内にのみ,照射する光ビームのパワーに応じて光学特性が変化する材料が埋め込まれていて,前記トラック案内溝には前記光学特性が変化する材料が埋め込まれていない光ディスク媒体のトラッキング方法であって,
メインビームと2つのサブビームで前記光ディスク媒体を照射し,
前記隣接する2つのトラック案内溝に照射された前記2つのサブビームの反射光を検出してサブビームのプッシュプル信号を生成し,
前記隣接する2つのトラック案内溝の間の領域に設けられた前記データトラックに照射された前記メインビームの反射光を検出してメインビームのプッシュプル信号を生成し,
前記メインビームのプッシュプル信号と前記サブビームのプッシュプル信号をもとにトラック誤差信号を生成し,
前記トラック誤差信号を用いてトラッキング制御を行うことを特徴とするトラッキング方法。 - 請求項1記載のトラッキング方法において,前記照射する光ビームのパワーが第1のパワーのとき,前記データピットからの反射光量がデータピット間の領域の反射光量と略等しく,前記照射する光ビームのパワーが前記第1のパワーよりも大きい第2のパワーのとき,前記データピットからの反射光量が前記データピット間の領域の反射光量と異なることを特徴とするトラッキング方法。
- 請求項2記載のトラッキング方法において,前記隣接する2つのトラック案内溝の間の領域に複数のデータトラックが設けられていることを特徴とするトラッキング方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006356034A JP4685754B2 (ja) | 2006-12-28 | 2006-12-28 | トラッキング方法 |
CN2007100062328A CN101211605B (zh) | 2006-12-28 | 2007-02-07 | 光盘媒体以及光盘装置 |
US11/704,963 US7746757B2 (en) | 2006-12-28 | 2007-02-12 | Optical disc medium and optical disc device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006356034A JP4685754B2 (ja) | 2006-12-28 | 2006-12-28 | トラッキング方法 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2008165927A JP2008165927A (ja) | 2008-07-17 |
JP2008165927A5 JP2008165927A5 (ja) | 2009-07-30 |
JP4685754B2 true JP4685754B2 (ja) | 2011-05-18 |
Family
ID=39583783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006356034A Expired - Fee Related JP4685754B2 (ja) | 2006-12-28 | 2006-12-28 | トラッキング方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7746757B2 (ja) |
JP (1) | JP4685754B2 (ja) |
CN (1) | CN101211605B (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008287795A (ja) * | 2007-05-17 | 2008-11-27 | Hitachi Ltd | 光ディスク媒体及びトラッキング方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4991189B2 (ja) | 2006-06-19 | 2012-08-01 | 株式会社日立製作所 | 光ディスク装置及びトラッキング方法 |
EP2346040A1 (en) * | 2010-01-08 | 2011-07-20 | Thomson Licensing | Optical storage medium comprising a super-resolution layer and a read-only data layer |
EP2372709A1 (en) * | 2010-03-30 | 2011-10-05 | Thomson Licensing | Optical storage medium comprising a data layer with reduced track pitch and an inverted/non-inverted mark/space data structure |
JP5968472B2 (ja) * | 2013-02-04 | 2016-08-10 | 三菱電機株式会社 | 光情報記録媒体及び記録再生装置 |
CN110415732B (zh) * | 2018-04-26 | 2021-03-30 | 中国科学院上海光学精密机械研究所 | 一种超分辨光盘的径向伺服装置及其伺服控制方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS61292228A (ja) * | 1985-06-20 | 1986-12-23 | Canon Inc | 光学的情報記録媒体の情報記録方法 |
JPH056578A (ja) * | 1990-10-03 | 1993-01-14 | Canon Inc | 光記録媒体及びその製造方法 |
JPH05258345A (ja) * | 1992-03-13 | 1993-10-08 | Sony Corp | 光ディスク |
JPH08221805A (ja) * | 1995-02-13 | 1996-08-30 | Hitachi Ltd | 光ディスク基板及びその製造方法 |
JPH10188378A (ja) * | 1996-12-25 | 1998-07-21 | Hitachi Maxell Ltd | 光磁気記録媒体及びその記録再生方法 |
JP2003168244A (ja) * | 2001-11-29 | 2003-06-13 | Ricoh Co Ltd | 光情報記録媒体 |
JP2003317275A (ja) * | 2002-04-26 | 2003-11-07 | Matsushita Electric Ind Co Ltd | 光ディスク装置 |
JP2006107588A (ja) * | 2004-10-04 | 2006-04-20 | Hitachi Ltd | 光情報記録媒体、その再生方法及びその製造方法 |
Family Cites Families (12)
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KR20020072214A (ko) * | 2001-03-09 | 2002-09-14 | 소니 가부시끼 가이샤 | 광디스크장치 및 광디스크장치를 위한 제어방법 |
US6699557B2 (en) * | 2001-03-30 | 2004-03-02 | Tdk Corporation | Optical recording medium and optical recording method |
CN100419867C (zh) * | 2003-05-12 | 2008-09-17 | 旭化成电子材料元件株式会社 | 光盘设备,用于光盘设备的电路,摆动信号再现方法,以及岸台预制凹坑信号再现方法 |
US7173781B2 (en) * | 2003-06-26 | 2007-02-06 | Seagate Technology Llc | Multi-tracks MR offset tuning based on error count in certification process |
JP2005100526A (ja) | 2003-09-25 | 2005-04-14 | Hitachi Ltd | デバイスの製造方法及び観察方法 |
US20070206463A1 (en) * | 2004-03-15 | 2007-09-06 | Kazuo Kuroda | Information Recording Medium |
KR100754166B1 (ko) * | 2004-05-17 | 2007-09-03 | 삼성전자주식회사 | 초해상 정보 저장매체 및 그 정보 기록 및/또는 재생기기 |
JP4456527B2 (ja) | 2005-05-20 | 2010-04-28 | 株式会社日立製作所 | 光情報記録媒体、並びにそれを用いた情報記録方法及び情報再生方法 |
JP4320312B2 (ja) | 2005-06-02 | 2009-08-26 | 株式会社日立製作所 | 相変化膜を含む記録媒体の製造方法 |
JP4285452B2 (ja) | 2005-07-06 | 2009-06-24 | 株式会社日立製作所 | デバイス及びその製造方法 |
US20080031123A1 (en) * | 2006-08-03 | 2008-02-07 | Wu-Hsuan Ho | Embossed type write-once recording medium structure |
JP4903081B2 (ja) * | 2007-05-17 | 2012-03-21 | 株式会社日立製作所 | 光ディスク媒体及びトラッキング方法 |
-
2006
- 2006-12-28 JP JP2006356034A patent/JP4685754B2/ja not_active Expired - Fee Related
-
2007
- 2007-02-07 CN CN2007100062328A patent/CN101211605B/zh not_active Expired - Fee Related
- 2007-02-12 US US11/704,963 patent/US7746757B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61292228A (ja) * | 1985-06-20 | 1986-12-23 | Canon Inc | 光学的情報記録媒体の情報記録方法 |
JPH056578A (ja) * | 1990-10-03 | 1993-01-14 | Canon Inc | 光記録媒体及びその製造方法 |
JPH05258345A (ja) * | 1992-03-13 | 1993-10-08 | Sony Corp | 光ディスク |
JPH08221805A (ja) * | 1995-02-13 | 1996-08-30 | Hitachi Ltd | 光ディスク基板及びその製造方法 |
JPH10188378A (ja) * | 1996-12-25 | 1998-07-21 | Hitachi Maxell Ltd | 光磁気記録媒体及びその記録再生方法 |
JP2003168244A (ja) * | 2001-11-29 | 2003-06-13 | Ricoh Co Ltd | 光情報記録媒体 |
JP2003317275A (ja) * | 2002-04-26 | 2003-11-07 | Matsushita Electric Ind Co Ltd | 光ディスク装置 |
JP2006107588A (ja) * | 2004-10-04 | 2006-04-20 | Hitachi Ltd | 光情報記録媒体、その再生方法及びその製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008287795A (ja) * | 2007-05-17 | 2008-11-27 | Hitachi Ltd | 光ディスク媒体及びトラッキング方法 |
Also Published As
Publication number | Publication date |
---|---|
US7746757B2 (en) | 2010-06-29 |
US20080159119A1 (en) | 2008-07-03 |
CN101211605A (zh) | 2008-07-02 |
JP2008165927A (ja) | 2008-07-17 |
CN101211605B (zh) | 2010-05-19 |
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