TW412721B - Method of and apparatus for optical information reproduction - Google Patents
Method of and apparatus for optical information reproduction Download PDFInfo
- Publication number
- TW412721B TW412721B TW088100555A TW88100555A TW412721B TW 412721 B TW412721 B TW 412721B TW 088100555 A TW088100555 A TW 088100555A TW 88100555 A TW88100555 A TW 88100555A TW 412721 B TW412721 B TW 412721B
- Authority
- TW
- Taiwan
- Prior art keywords
- offset
- phase
- output
- aforementioned
- phase difference
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title abstract description 18
- 238000000034 method Methods 0.000 title abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 2
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
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
- G11B7/13—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
- G11B7/08—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
- G11B7/08—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
- G11B7/094—Methods and circuits for servo offset compensation
-
- 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
- G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs
-
- 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
- G11B7/0945—Methods for initialising servos, start-up sequences
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
Description
412721
修正 •如申請專利範圍第1項之光學資訊再生裝置,其中之該 偏移校正學習裝置(7),具備有·· 偏移調整裝置(74) ’用以調整重疊來自相位差檢 測裝置(6 )之輸出上的電性偏移者; 偏移測定裝置(7 3 ),用以測定來自該偏移調整裝 置(7 4)的輸出,以求出電性偏移者; 再生位準測定裝置(7 5 ),用以測定來自該偏移調 整裝置(74)的輪出振幅者;以及 控制装置(7 2 ),藉由來自前述偏移測定裝置(7 3 ) 之輸出和來自再生位準測定裝置(75)之輸出,以控制 前述相位差檢測裝置(6)、前述偏移調整裝置(74)及前 述相位調整裝置(3,4,11,12)者。 4·如申請專利範圍第1項之光學資訊再生裝置,其中相位 差檢測裝置(6)具備有’依相位比較裝置而檢測信號間 之相位差’依低通遽波器(以下稱為「LPF」)將前述相 位差轉換成電壓,並藉由可改變前述LPF之增益而將轉 換增益變更為相位差之電壓的構成。 5 ·如申請專利範圍第1項之光學資訊再生裝置,其中相位 差檢測裝置(6 )具備有,依相位比較裝置而檢測二信號 間之相位差’依充電泵和LPF將相位差轉換成電壓,並^ 藉由可改變別述充電泵之驅動電流或是前述LPF之增益 而將轉換增益變更為相位差之電壓的構成。 6 · —種光學寅訊再生方法,係以光點追蹤以資訊凹坑列
412721 _____案號 88100555_Ί0年 j 月 W a 修正__ 六、申請專利範圍 記錄在資訊載體上的資訊執道以便讀取記錄資訊之方 法,其特徵為: 前述方法係依光學資訊再生裝置所實施者,而該 裝置具有丄 光源(21) ’用以產生光束; 光電轉換裝置(25),包含有第一至第四光檢測器 (25a至25d);以及 光學系(22, 24),經由前述資訊載體將來自前述光 源之光束導至前述光電轉換裝置上,其中, 前述第一至第四光檢測器(25a至25d)係用以將前 述光束轉換成電信號, 前述第一至第四光檢測器(25a至25d),係在資訊 凹坑之遠場(far-fie Id)中,位於假想的座標系(於 光學系之軸線上具有原點,其X軸延伸於執道之切線方 向上’其Υ軸延伸與軌道之切線正交的方向上)内之四 個象限内, 第一及第二光檢測器2 5 a即2 5 b係位於Υ軸之一方側 上, 第三光檢測器2 5 c係位於Y軸之另一方側上,且對 第一光檢測器25a位於對角線上,第四光檢測器25d係 位於Y軸之另一方側上,且對第二光檢測器2 5 b位於對 角線上, 前述方法具備有如下之步驟, (a)當偏移校正學習態之動作被啟動時會進行初期設定
412721 _案號88100555_外年;月 ^曰__ 六、申請專利範圍 之步驟; (b )選擇第一相位比模態之步驟,用以檢測將第一至第 四相位調整輸出(A’至D’)中之第一相位調整輸出 (A’)及前述第二相位調整輸出(B’)加算的第一和信 號(A’+B’)、與將前述第三相位調整輸出(C’)及前述 第四相位調整輸出(D’)加算的第二和信號(C’+D’)之 相位差,其中第一至第四相位調整輸出(A’至D’)係 用以個別調整來自前述第一至第四光檢測器(2 5 a至 25d)之輸出的各個相位者; (c) 將透鏡(24)向資訊載體之内外周的一方方驅動之步 驟; (d) 在前述透鏡(24)被向資訊載體之内外周的一方側驅 動之狀態中,以前述第一相位比較模態檢測相位差 之步驟; (e) 個別調整來自第一至第四光檢測器之輸出相位以消 除在前述步驟(d)所檢測出的相位差之步驟; (f) 將透鏡(24)向資訊載體之内外周的另一方向驅動之 步驟; (g) 在前述透鏡(2 4 )被向資訊載體之内外周的另一方側 驅動之狀態十,以前述第一相位比較模態檢測相位 差之步驟;- (h) 個別調整來自第一至第四光檢測器之輸出相位以消 除在前述步驟(g)所檢測出的相位差之步驟;以及 (i) 調整前述步驟(e)和前述步驟(h)之調整量之步驟。
A:\310312.ptc 第5頁 2001.03. 28. 045 412721 修正 案號 88100555 六、申請專利範圍 7.如申請專利範圍第6項之光學資訊再生方法,其更具備 有: 選擇第二相位比較模態以檢測加算第一相位調整 輸出和第三相位調整輸出的第三和信號(A’+C’),與將 第二相位調整輸出和前述第四相位調整輸出加算的第 四和信號(B’+D’)之相位差的步驟; 調整由第二相位比較模態所檢測之相位差輸出的 再生位準變成容許值内的步驟;以及 將重疊於相位差輸出上的電性偏移整成容許值内 的步驟。 8 ·如申請專利範圍第6項之光學資訊再生方法,其在前述 步驟@之後,具備有: 選擇第二相位比較.模態以檢測將第一相位調整輸 出和前述第三相位調整輸出加算的第三和信號(A’ +C’) ,與將前述第二相位調整輸出和前述第四相位調整輸 出加算的第四和信號(B’+D,)之相位差的步驟;以及 調整追蹤誤差信號之振幅的步驟。 9. 一種光學資訊再生裝置之偏移除去電路,係以光點追 蹤以資訊凹坑列記錄在資訊載體上的資訊軌道以便讀 取記錄資訊之光學資訊再生裝置用的偏移除去電路, 其特徵為: 前述光學資訊再生裝置具有, 光源(2 1 ),用以產生光束; 光電轉換裝置(25),包含有第一至第四光檢測器
A:\310312.ptc 第6頁 2001.03. 28. 046 412721 案號 88100555 a 修正 六、申請專利範圍 (25a至25d);以及 光學系(22, 24),經由前述資訊載體將來自前述光 源之光束導至前述光電轉換裝置,其中, 前述第一至第四光檢測器(2 5 a至2 5 d )係用以將前 述光轉換成電信號, 前述第一至第四光檢測器(25a至2 5d),係在資訊 凹坑之遠場(f a r - f i e 1 d )中,位於假想的X - Y座標系(於 光學系之軸線上具有原點,其X軸向執道之切線方向延 伸,其Y軸向與執道之切線正交的方向延伸)内之四個 象限内, 第一及第二光檢測器2 5 a 1 2 5 b係位於Y軸之一方側 上, 第三光檢測器2 5 c係位於Y軸之另一方側上,且位 於第一光檢測器25a之對角線上,第四光檢測器25d係 位於Y軸之另一方側上,且位於第二光檢測器2 5 b之對 角線上, 前述偏移除去電路具備有: 第一至第四相位調整裝置(3, 4, 11,,12),用以個別 整前述第一至第四光檢測器(25a至25d)之各個輸出相 位; 相位差檢測裝置·( 6 ),用以檢測將前述第一相位調 整裝置之輸出(A’)及前述第二相位調整裝置之輸出 (6’)加算的第一和信號(4’+:6’)、與將前述第三相位調 整裝置之輸出(C’)及前述第四相位調整裝置之輸出
A:\310312.ptc 第7頁 2001.03. 28.047 412721 修正 案號 88100555 六、申請專利範圍 (〇’)加算的第二和信號((:’+0’)之相位差;以及 相位調整量設定裝置(5),用以設定前述第一至第 四相位調整裝置之相位調整量俾使前述第一和信號 (A’ +Β’)和第二和信號(C’ +D’)之間的相位差成為0。 10.如申請專利範圍第9項之光學資訊再生裝置之偏移除去 電路,具備有偏移調整裝置(7),係當停止前述相位差 檢測裝置(6)之動作時用以調整電路之電性偏移量者。
A:\310312.ptc 第8頁 2001.03. 28. 048
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00658398A JP3544847B2 (ja) | 1998-01-16 | 1998-01-16 | 光学的情報再生方法および装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW412721B true TW412721B (en) | 2000-11-21 |
Family
ID=11642358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW088100555A TW412721B (en) | 1998-01-16 | 1999-01-15 | Method of and apparatus for optical information reproduction |
Country Status (8)
Country | Link |
---|---|
US (1) | US6339567B1 (zh) |
EP (1) | EP0930612B1 (zh) |
JP (1) | JP3544847B2 (zh) |
KR (1) | KR100285135B1 (zh) |
CN (1) | CN1138261C (zh) |
DE (1) | DE69930884T2 (zh) |
HK (1) | HK1023446A1 (zh) |
TW (1) | TW412721B (zh) |
Families Citing this family (27)
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---|---|---|---|---|
US6111329A (en) * | 1999-03-29 | 2000-08-29 | Graham; Gregory S. | Armature for an electromotive device |
TWI233805B (en) * | 1999-07-01 | 2005-06-11 | Fujisawa Pharmaceutical Co | Stabilized pharmaceutical composition in lyophilized form as antifungal agent |
US7102967B1 (en) * | 1999-07-08 | 2006-09-05 | Samsung Electronics Co., Ltd. | Method and apparatus for tracking error detection in optical disk driver |
US20050068864A1 (en) * | 1999-07-08 | 2005-03-31 | Samsung Electronics Co., Ltd. | Method and apparatus for tracking error detection in optical disk driver |
KR100713545B1 (ko) * | 1999-12-15 | 2007-04-30 | 엘지전자 주식회사 | 광디스크의 트래킹 방법 및 장치 |
JP2001195754A (ja) * | 2000-01-13 | 2001-07-19 | Matsushita Electric Ind Co Ltd | トラッキング誤差検出装置 |
TW480356B (en) * | 2000-02-11 | 2002-03-21 | Koninkl Philips Electronics Nv | Optical transducer and recording/playback device comprising the transducer |
US7113460B2 (en) * | 2000-03-06 | 2006-09-26 | Sharp Kabushiki Kaisha | Optical disk having pits of different depths formed therein, optical disk reproducing apparatus for reproducing the optical disk, and method of tracking the optical disk |
JP3883100B2 (ja) * | 2001-05-30 | 2007-02-21 | 富士通株式会社 | トラッキング制御方法及び記憶装置 |
JP2005524192A (ja) * | 2002-05-01 | 2005-08-11 | エルジー エレクトロニクス インコーポレーテッド | 高密度再生専用光ディスクとそれによる光ディスク装置及び方法 |
JP3665629B2 (ja) | 2002-07-30 | 2005-06-29 | 株式会社東芝 | 光ディスク装置と光ディスク装置の外乱学習方法 |
CN1331139C (zh) * | 2002-08-26 | 2007-08-08 | 松下电器产业株式会社 | 光盘装置、光盘种类辨别方法及球面像差调整方法 |
US7196977B2 (en) * | 2002-10-31 | 2007-03-27 | Matsushita Electric Industrial Co., Ltd. | Track jump control circuit for accessing optical disk drive |
TWI242184B (en) * | 2003-01-30 | 2005-10-21 | Lite On It Corp | Disc discrimination method for discriminating disc type of digital versatile disc |
CN1293564C (zh) * | 2003-01-31 | 2007-01-03 | 松下电器产业株式会社 | 信号处理装置以及信号处理方法 |
TWI257621B (en) * | 2003-09-30 | 2006-07-01 | Mediatek Inc | Track locking method and apparatus for optical disk device |
KR20070026863A (ko) * | 2004-06-28 | 2007-03-08 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 광 디스크 판독의 강건성 개선방법 |
CN100349217C (zh) * | 2004-10-20 | 2007-11-14 | 建兴电子科技股份有限公司 | 可补偿摇摆定址信号的光盘机及其方法 |
WO2006129683A1 (ja) * | 2005-06-01 | 2006-12-07 | Matsushita Electric Industrial Co., Ltd. | 位相誤差検出装置 |
KR101039194B1 (ko) * | 2006-07-27 | 2011-06-03 | 미쓰비시덴키 가부시키가이샤 | 광디스크 매체 및 광디스크 장치 |
KR20090061248A (ko) * | 2007-12-11 | 2009-06-16 | 삼성전자주식회사 | 트래킹 에러 신호 검출 방법 및 장치 |
JP2009146491A (ja) * | 2007-12-13 | 2009-07-02 | Hitachi Ltd | 光ディスク装置 |
US9917645B2 (en) * | 2016-05-25 | 2018-03-13 | Google Llc | Phase sensitive beam tracking |
JP6767219B2 (ja) * | 2016-09-21 | 2020-10-14 | 株式会社東芝 | オフセット検出回路 |
CN113874922B (zh) * | 2019-05-29 | 2023-08-18 | 亚萨合莱有限公司 | 基于样本的相位差来确定移动钥匙装置的位置 |
EP3745155A1 (en) | 2019-05-29 | 2020-12-02 | Assa Abloy AB | Determining a position of a mobile key device based on phase difference of samples |
US11646059B2 (en) * | 2021-08-30 | 2023-05-09 | Seagate Technology Llc | Estimating read offset in a drive using machine learning |
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US4057833A (en) | 1974-10-03 | 1977-11-08 | U.S. Philips Corporation | Centering detection system for an apparatus for playing optically readable record carriers |
NL182258C (nl) | 1976-01-28 | 1988-02-01 | Philips Nv | Inrichting voor het uitlezen van een vlakke registratiedrager met een optisch uitleesbare informatiestructuur. |
JPH063648B2 (ja) * | 1986-01-16 | 1994-01-12 | 松下電器産業株式会社 | 光学的情報再生装置 |
JPH056575Y2 (zh) * | 1986-04-18 | 1993-02-19 | ||
JPH02108244A (ja) * | 1988-10-17 | 1990-04-20 | Matsushita Electric Ind Co Ltd | 光学的情報再生装置 |
JPH09288832A (ja) * | 1996-04-22 | 1997-11-04 | Toshiba Corp | トラッキングエラー信号生成回路 |
TW364992B (en) * | 1996-04-25 | 1999-07-21 | Toshiba Corp | Optic data regeneration apparatus and control method thereof |
DE19627383A1 (de) * | 1996-07-06 | 1998-01-08 | Thomson Brandt Gmbh | Gerät zum Lesen oder Beschreiben optischer Aufzeichnungsträger |
US6028826A (en) * | 1996-09-18 | 2000-02-22 | Matsushita Electric Industrial Co., Ltd. | Optical disk apparatus performing correction of phase difference tracking error signal, adjustment of focus position and process of gain adjustment |
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1998
- 1998-01-16 JP JP00658398A patent/JP3544847B2/ja not_active Expired - Fee Related
-
1999
- 1999-01-14 KR KR1019990000796A patent/KR100285135B1/ko not_active IP Right Cessation
- 1999-01-15 TW TW088100555A patent/TW412721B/zh not_active IP Right Cessation
- 1999-01-15 CN CNB991013107A patent/CN1138261C/zh not_active Expired - Fee Related
- 1999-01-15 EP EP99300266A patent/EP0930612B1/en not_active Expired - Lifetime
- 1999-01-15 DE DE69930884T patent/DE69930884T2/de not_active Expired - Lifetime
- 1999-01-19 US US09/233,054 patent/US6339567B1/en not_active Expired - Fee Related
-
2000
- 2000-04-26 HK HK00102485A patent/HK1023446A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR19990067899A (ko) | 1999-08-25 |
EP0930612B1 (en) | 2006-04-19 |
EP0930612A2 (en) | 1999-07-21 |
JPH11203693A (ja) | 1999-07-30 |
CN1138261C (zh) | 2004-02-11 |
HK1023446A1 (en) | 2000-09-08 |
CN1233041A (zh) | 1999-10-27 |
KR100285135B1 (ko) | 2001-03-15 |
US6339567B1 (en) | 2002-01-15 |
DE69930884T2 (de) | 2006-11-30 |
DE69930884D1 (de) | 2006-05-24 |
JP3544847B2 (ja) | 2004-07-21 |
EP0930612A3 (en) | 2000-05-03 |
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