DE69622023T2 - Gerät zur wiedergabe eines optisch lesbaren aufzeichnungsträgers - Google Patents
Gerät zur wiedergabe eines optisch lesbaren aufzeichnungsträgersInfo
- Publication number
- DE69622023T2 DE69622023T2 DE69622023T DE69622023T DE69622023T2 DE 69622023 T2 DE69622023 T2 DE 69622023T2 DE 69622023 T DE69622023 T DE 69622023T DE 69622023 T DE69622023 T DE 69622023T DE 69622023 T2 DE69622023 T2 DE 69622023T2
- Authority
- DE
- Germany
- Prior art keywords
- focus error
- error signal
- signals
- frequency components
- electronic circuit
- 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.)
- Expired - Fee Related
Links
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 (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95203643 | 1995-12-27 | ||
PCT/IB1996/001359 WO1997024717A1 (en) | 1995-12-27 | 1996-12-05 | Device for scanning an optically readable record carrier |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69622023D1 DE69622023D1 (de) | 2002-08-01 |
DE69622023T2 true DE69622023T2 (de) | 2003-03-06 |
Family
ID=8221017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69622023T Expired - Fee Related DE69622023T2 (de) | 1995-12-27 | 1996-12-05 | Gerät zur wiedergabe eines optisch lesbaren aufzeichnungsträgers |
Country Status (8)
Country | Link |
---|---|
US (1) | US5852592A (de) |
EP (1) | EP0812457B1 (de) |
JP (1) | JPH11501444A (de) |
AT (1) | ATE219854T1 (de) |
DE (1) | DE69622023T2 (de) |
MY (1) | MY117472A (de) |
TW (1) | TW318232B (de) |
WO (1) | WO1997024717A1 (de) |
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 JP JP9524128A patent/JPH11501444A/ja not_active Ceased
- 1996-12-05 EP EP96938435A patent/EP0812457B1/de not_active Expired - Lifetime
- 1996-12-05 DE DE69622023T patent/DE69622023T2/de not_active Expired - Fee Related
- 1996-12-05 AT AT96938435T patent/ATE219854T1/de not_active IP Right Cessation
- 1996-12-05 WO PCT/IB1996/001359 patent/WO1997024717A1/en active IP Right Grant
- 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 |
---|---|
TW318232B (de) | 1997-10-21 |
JPH11501444A (ja) | 1999-02-02 |
EP0812457A1 (de) | 1997-12-17 |
EP0812457B1 (de) | 2002-06-26 |
ATE219854T1 (de) | 2002-07-15 |
DE69622023D1 (de) | 2002-08-01 |
MY117472A (en) | 2004-07-31 |
US5852592A (en) | 1998-12-22 |
WO1997024717A1 (en) | 1997-07-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |