JP2007018728A - 多層情報記憶システム - Google Patents
多層情報記憶システム Download PDFInfo
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- JP2007018728A JP2007018728A JP2006249657A JP2006249657A JP2007018728A JP 2007018728 A JP2007018728 A JP 2007018728A JP 2006249657 A JP2006249657 A JP 2006249657A JP 2006249657 A JP2006249657 A JP 2006249657A JP 2007018728 A JP2007018728 A JP 2007018728A
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- 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
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
-
- 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
-
- 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
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
-
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
-
- 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
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
- G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in only
-
- 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
- G11B7/0908—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 focusing only
- G11B7/0909—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 focusing only by astigmatic methods
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Debugging And Monitoring (AREA)
- Magnetic Record Carriers (AREA)
Abstract
【解決手段】光多層記録キャリヤ(1)と、層(3,4,5)を放射ビーム(12)によって形成される走査スポット(15)によって走査する装置(10)とを具える情報記憶システムを記述する。前記放射ビームを、前記層のスタック(2)内の走査スポットの1つの高さに対する球面収差に対して補正する。前記スタックの高さを、本システムに対する許容しうる最大の球面収差によって規定する。前記スタック内の層の数を、層間の最小間隔によって規定し、この間隔は、現在走査されていない層によるサーボエラー信号におけるクロストークに依存する。
【選択図】図1
Description
1.スペーサ層と交互の情報層のスタックを有する光記録キャリヤと、
前記情報層を走査する装置とを具え、この装置に、放射源と、前記放射源からの放射ビームを前記分離した情報層上に選択的に焦点合わせする手段と、フォーカスサーボシステムとを設けた情報記憶システムにおいて、
各々のスペーサ層の厚さを、前記スペーサ層の屈折率に前記フォーカスサーボシステムのS曲線のピークからピークの間隔を乗算した値の少なくとも1.5倍としたことを特徴とする情報記憶装置。
2.実施態様項1に記載の情報記憶装置において、前記スペーサ層の厚さを、前記スペーサ層の屈折率に前記フォーカスサーボシステムのS曲線のピークからピークの間隔を乗算した値の4倍より小さくしたことを特徴とする情報記憶装置。
3.実施態様項1または2に記載の情報記憶装置において、前記焦点合わせ手段が、一定でスタックが関係する球面収差を前記放射ビーム中に導入し、この収差が、放射ビームが前記情報層のスタックの高さの半分程度において焦点合わせされる場合に前記放射ビームによって受ける球面収差を補正するようにしたことを特徴とする情報記憶装置。
4.実施態様項1、2または3に記載の情報記憶装置において、前記スタックの厚さを、前記スタックの材料の屈折率と前記焦点合わせ手段の開口数との関数である値2dより小さくしたことを特徴とする情報記憶装置。
5.実施態様項4に記載の情報記憶装置において、前記値2dを、球面収差による走査スポットのシュトレール強度の許容しうる最大の減少値の関数にもしたことを特徴とする情報記憶装置。
6.実施態様項5に記載の情報記憶装置において、前記値2dを、式、
7.実施態様項6に記載の情報記憶装置において、前記記録キャリヤが、一方の側において前記放射ビームが入射する入射面を有するとともに他方の側において前記スタックを有する透明基板を具え、前記スタックの厚さを2dから前記基板の厚さ公差を減算した値より小さくしたことを特徴とする情報記憶装置。
8.放射源と、前記放射源からの放射ビームを別々の情報層に選択的に焦点合わせする焦点合わせ手段と、放射感応面を有する検出システムを具えるサーボシステムとを設けた、光記録キャリヤの情報層を走査する装置において、前記放射感応面が、前記放射ビームが走査すべき前記情報層上に最適に焦点合わせされている場合に前記放射感応面上に形成される放射スポットの直径の3倍より小さい最大寸法を有することを特徴とする装置。
9.実施態様項8に記載の装置において、前記放射源と前記焦点合わせ手段との間の光経路中に位置し、前記放射ビームから2つのサーボビームと1つのメインビームとを発生する分割手段を設け、前記メインビームにおけるパワーを、各々の前記サーボビームにおけるパワーの6倍より小さくしたことを特徴とする装置。
10.異なった高さにおいて複数の情報層を有し、これらの情報層をスペーサ層によって分離し、前記記録キャリヤが、一定の球面収差補正を有する焦点合わせされた放射ビームによって読み取るのに適している光記録キャリヤにおいて、最も高い情報層と最も低い情報層との間隔が、
11.実施態様項10に記載の光記録キャリヤにおいて、前記rを0.01としたことを特徴とする光記録キャリヤ。
12.実施態様項10または11に記載の光記録キャリヤにおいて、一方の側において前記放射ビームに対する入射面を有するとともに他方の側において前記スタックを有する透明基板を具え、最も高い情報層と最も低い情報層との間隔を、前記2dから前記基板の厚さ公差を減算した値より小さくしたことを特徴とする光記録キャリヤ。
Claims (2)
- 放射源と、前記放射源からの放射ビームを別々の情報層に選択的に焦点合わせする焦点合わせ手段と、放射感応面を有する検出システムを具えるサーボシステムとを設けた、光記録キャリヤの情報層を走査する装置において、前記放射感応面が、前記放射ビームが走査すべき前記情報層上に最適に焦点合わせされている場合に前記放射感応面上に形成される放射スポットの直径の3倍より小さい最大寸法を有することを特徴とする装置。
- 前記放射源と前記焦点合わせ手段との間の光経路中に位置し、前記放射ビームから2つのサーボビームと1つのメインビームとを発生する分割手段を設け、前記メインビームにおけるパワーを、各々の前記サーボビームにおけるパワーの6倍より小さくしたことを特徴とする請求項1記載の装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94202416 | 1994-08-23 | ||
US08/299,861 US5677903A (en) | 1991-03-25 | 1994-09-01 | Multi-layer information storage system with improved aberration correction |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50790696A Division JP2002515157A (ja) | 1994-08-23 | 1995-08-16 | 多層情報記憶システム |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2007018728A true JP2007018728A (ja) | 2007-01-25 |
Family
ID=26136515
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50790696A Pending JP2002515157A (ja) | 1994-08-23 | 1995-08-16 | 多層情報記憶システム |
JP2006249657A Pending JP2007018728A (ja) | 1994-08-23 | 2006-09-14 | 多層情報記憶システム |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50790696A Pending JP2002515157A (ja) | 1994-08-23 | 1995-08-16 | 多層情報記憶システム |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0729629B1 (ja) |
JP (2) | JP2002515157A (ja) |
KR (3) | KR100385382B1 (ja) |
CN (1) | CN1083131C (ja) |
AT (1) | ATE253767T1 (ja) |
CZ (1) | CZ289539B6 (ja) |
DE (1) | DE69532072T2 (ja) |
HK (1) | HK1013366A1 (ja) |
MY (1) | MY130309A (ja) |
PL (1) | PL180658B1 (ja) |
WO (1) | WO1996006427A2 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5625609A (en) * | 1995-03-13 | 1997-04-29 | International Business Machines Corporation | Multiple data layer optical disk drive system with fixed aberration correction and optimum interlayer spacing |
JPH1011786A (ja) * | 1996-06-21 | 1998-01-16 | Pioneer Electron Corp | 情報記録媒体の再生用ピックアップ装置 |
JP2002025098A (ja) * | 2000-07-07 | 2002-01-25 | Pioneer Electronic Corp | ピックアップ装置 |
JP4242108B2 (ja) | 2001-06-04 | 2009-03-18 | パナソニック株式会社 | 光ピックアップヘッドおよび情報記録再生装置 |
ATE356407T1 (de) * | 2003-08-26 | 2007-03-15 | Koninkl Philips Electronics Nv | Optische scan-einrichtung |
ATE413681T1 (de) * | 2004-01-19 | 2008-11-15 | Koninkl Philips Electronics Nv | Objektivlinse |
JP2006073053A (ja) | 2004-08-31 | 2006-03-16 | Tdk Corp | 光記録媒体 |
JP4205084B2 (ja) * | 2005-08-26 | 2009-01-07 | シャープ株式会社 | 光ピックアップ |
RU2008147881A (ru) * | 2006-05-05 | 2010-06-10 | Конинклейке Филипс Электроникс Н.В. (Nl) | Улучшенное считывание/запись информации для многослойных оптических дисков |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0638291B2 (ja) * | 1987-06-22 | 1994-05-18 | 三菱電機株式会社 | 光学式情報記録再生装置 |
NL9002841A (nl) * | 1990-12-21 | 1992-07-16 | Philips Nv | Werkwijze en inrichting voor het langs optische weg inschrijven, uitlezen, en wissen van een meervlaks registratiedrager, en registratiedrager geschikt voor deze werkwijze en inrichting. |
TW221074B (ja) * | 1991-05-10 | 1994-02-11 | Philips Nv | |
US5202875A (en) * | 1991-06-04 | 1993-04-13 | International Business Machines Corporation | Multiple data surface optical data storage system |
CN1029805C (zh) * | 1991-06-04 | 1995-09-20 | 国际商业机器公司 | 多数据表面数据存贮***和方法 |
EP0605924B1 (en) * | 1993-01-04 | 1999-06-23 | Koninklijke Philips Electronics N.V. | Multiplane information storage system and record carrier for use in such a system |
-
1995
- 1995-08-16 CZ CZ19961174A patent/CZ289539B6/cs not_active IP Right Cessation
- 1995-08-16 AT AT95927046T patent/ATE253767T1/de active
- 1995-08-16 PL PL95314789A patent/PL180658B1/pl unknown
- 1995-08-16 KR KR10-2002-7016178A patent/KR100385382B1/ko not_active IP Right Cessation
- 1995-08-16 JP JP50790696A patent/JP2002515157A/ja active Pending
- 1995-08-16 KR KR10-2002-7016179A patent/KR100385381B1/ko not_active IP Right Cessation
- 1995-08-16 KR KR1019960702076A patent/KR100433600B1/ko not_active IP Right Cessation
- 1995-08-16 CN CN95190979A patent/CN1083131C/zh not_active Expired - Lifetime
- 1995-08-16 WO PCT/IB1995/000648 patent/WO1996006427A2/en active IP Right Grant
- 1995-08-16 EP EP95927046A patent/EP0729629B1/en not_active Expired - Lifetime
- 1995-08-16 DE DE69532072T patent/DE69532072T2/de not_active Expired - Lifetime
- 1995-08-22 MY MYPI20014950A patent/MY130309A/en unknown
-
1998
- 1998-12-22 HK HK98114664A patent/HK1013366A1/xx not_active IP Right Cessation
-
2006
- 2006-09-14 JP JP2006249657A patent/JP2007018728A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
CZ289539B6 (cs) | 2002-02-13 |
KR960706161A (ko) | 1996-11-08 |
KR100385382B1 (ko) | 2003-05-27 |
EP0729629B1 (en) | 2003-11-05 |
JP2002515157A (ja) | 2002-05-21 |
CN1136357A (zh) | 1996-11-20 |
PL314789A1 (en) | 1996-09-30 |
WO1996006427A3 (en) | 1996-05-23 |
CN1083131C (zh) | 2002-04-17 |
DE69532072D1 (de) | 2003-12-11 |
KR100385381B1 (ko) | 2003-05-27 |
PL180658B1 (pl) | 2001-03-30 |
EP0729629A1 (en) | 1996-09-04 |
KR100433600B1 (ko) | 2004-11-09 |
WO1996006427A2 (en) | 1996-02-29 |
DE69532072T2 (de) | 2004-08-26 |
CZ117496A3 (cs) | 1998-01-14 |
ATE253767T1 (de) | 2003-11-15 |
MY130309A (en) | 2007-06-29 |
HK1013366A1 (en) | 1999-08-20 |
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