TW318232B - - Google Patents
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- Publication number
- TW318232B TW318232B TW085115746A TW85115746A TW318232B TW 318232 B TW318232 B TW 318232B TW 085115746 A TW085115746 A TW 085115746A TW 85115746 A TW85115746 A TW 85115746A TW 318232 B TW318232 B TW 318232B
- Authority
- TW
- Taiwan
- Prior art keywords
- focus error
- error signal
- signal
- information layer
- information
- Prior art date
Links
- 230000005855 radiation Effects 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims description 3
- 238000011896 sensitive detection Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 17
- 238000010606 normalization Methods 0.000 description 12
- 201000009310 astigmatism Diseases 0.000 description 10
- 239000000758 substrate Substances 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 230000007704 transition Effects 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
- G11B7/08—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
- G11B7/094—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
- G11B7/0945—Methods for initialising servos, start-up sequences
-
- 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
- G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
-
- 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
- G11B7/09—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
-
- 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
-
- 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
- G11B7/0912—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 push-pull method
Landscapes
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Display Devices Of Pinball Game Machines (AREA)
- Auxiliary Devices For Music (AREA)
- Holo Graphy (AREA)
- Automatic Focus Adjustment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95203643 | 1995-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW318232B true TW318232B (https=) | 1997-10-21 |
Family
ID=8221017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW085115746A TW318232B (https=) | 1995-12-27 | 1996-12-20 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5852592A (https=) |
| EP (1) | EP0812457B1 (https=) |
| JP (1) | JPH11501444A (https=) |
| AT (1) | ATE219854T1 (https=) |
| DE (1) | DE69622023T2 (https=) |
| MY (1) | MY117472A (https=) |
| TW (1) | TW318232B (https=) |
| WO (1) | WO1997024717A1 (https=) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3845982B2 (ja) | 1997-10-17 | 2006-11-15 | ソニー株式会社 | 光ピックアップ装置 |
| KR100375514B1 (ko) * | 1997-10-20 | 2003-11-28 | 삼성전기주식회사 | 광픽업장치 |
| WO1999024974A2 (en) * | 1997-11-07 | 1999-05-20 | Koninklijke Philips Electronics N.V. | Optical scanning device |
| JP2000182254A (ja) * | 1998-12-15 | 2000-06-30 | Pioneer Electronic Corp | ピックアップ装置 |
| US6339565B1 (en) * | 1999-03-31 | 2002-01-15 | Lsi Logic Corporation | Non-linear center-error generator for DVD servo control |
| TW491994B (en) * | 2000-02-16 | 2002-06-21 | Via Tech Inc | Method and apparatus of finding the focus for a compact disc |
| KR100806214B1 (ko) * | 2000-08-24 | 2008-02-22 | 톰슨 라이센싱 | 보정된 에러 신호 생성 방법 및 장치 |
| TWI222628B (en) * | 2003-07-09 | 2004-10-21 | Mediatek Inc | Method of vertical deviation disc detection |
| US7258414B2 (en) * | 2004-09-17 | 2007-08-21 | Ricoh Company, Ltd. | Image-forming apparatus |
| CN101213597B (zh) | 2005-06-30 | 2010-12-29 | 皇家飞利浦电子股份有限公司 | 用于逐步关闭光学驱动系统的聚焦控制回路的方法 |
| KR20080010050A (ko) * | 2006-07-25 | 2008-01-30 | 삼성전자주식회사 | 광 디스크 드라이브 및 그 제어 방법 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7313454A (nl) * | 1973-10-01 | 1975-04-03 | Philips Nv | Opto-elektronisch stelsel voor het bepalen van een king tussen de werkelijke positie van een stralings kterend vlak in een optisch afbeeldingsstelsel en d ste positie van dit vlak. |
| NL177157C (nl) * | 1975-02-28 | 1985-08-01 | Philips Nv | Inrichting voor het uitlezen van een vlakke registratiedrager met een optisch uitleesbare informatiestruktuur. |
| NL8502835A (nl) * | 1985-10-17 | 1987-05-18 | Philips Nv | Inrichting voor het met optische straling aftasten van een informatievlak. |
| JP3028854B2 (ja) * | 1990-07-18 | 2000-04-04 | セイコーエプソン株式会社 | 光ヘッド及び光記憶再生装置 |
| JPH06111344A (ja) * | 1992-09-30 | 1994-04-22 | Pioneer Electron Corp | 光ピックアップ装置 |
| JPH07311970A (ja) * | 1994-05-17 | 1995-11-28 | Seiko Epson Corp | 光ヘッド及び光記憶装置 |
| TW363182B (en) * | 1995-02-09 | 1999-07-01 | Hitachi Ltd | Positioning apparatus for optical disks |
-
1996
- 1996-12-05 EP EP96938435A patent/EP0812457B1/en not_active Expired - Lifetime
- 1996-12-05 WO PCT/IB1996/001359 patent/WO1997024717A1/en not_active Ceased
- 1996-12-05 AT AT96938435T patent/ATE219854T1/de not_active IP Right Cessation
- 1996-12-05 JP JP9524128A patent/JPH11501444A/ja not_active Ceased
- 1996-12-05 DE DE69622023T patent/DE69622023T2/de not_active Expired - Fee Related
- 1996-12-13 US US08/764,192 patent/US5852592A/en not_active Expired - Fee Related
- 1996-12-20 TW TW085115746A patent/TW318232B/zh active
- 1996-12-26 MY MYPI96005486A patent/MY117472A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| MY117472A (en) | 2004-07-31 |
| JPH11501444A (ja) | 1999-02-02 |
| DE69622023T2 (de) | 2003-03-06 |
| WO1997024717A1 (en) | 1997-07-10 |
| ATE219854T1 (de) | 2002-07-15 |
| DE69622023D1 (de) | 2002-08-01 |
| EP0812457B1 (en) | 2002-06-26 |
| EP0812457A1 (en) | 1997-12-17 |
| US5852592A (en) | 1998-12-22 |
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