TW200509108A - Method for obtaining the best focusing point of optical pickup and server system of its CD-ROM drive - Google Patents
Method for obtaining the best focusing point of optical pickup and server system of its CD-ROM driveInfo
- Publication number
- TW200509108A TW200509108A TW093123723A TW93123723A TW200509108A TW 200509108 A TW200509108 A TW 200509108A TW 093123723 A TW093123723 A TW 093123723A TW 93123723 A TW93123723 A TW 93123723A TW 200509108 A TW200509108 A TW 200509108A
- Authority
- TW
- Taiwan
- Prior art keywords
- optical pickup
- signal
- server system
- rom drive
- focusing point
- Prior art date
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
- G11B7/094—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
- G11B7/0908—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
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
-
- 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
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US49307803P | 2003-08-06 | 2003-08-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200509108A true TW200509108A (en) | 2005-03-01 |
Family
ID=34619288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW093123723A TW200509108A (en) | 2003-08-06 | 2004-08-06 | Method for obtaining the best focusing point of optical pickup and server system of its CD-ROM drive |
Country Status (3)
Country | Link |
---|---|
US (1) | US7626899B2 (zh) |
CN (1) | CN1272779C (zh) |
TW (1) | TW200509108A (zh) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005166080A (ja) * | 2003-11-28 | 2005-06-23 | Matsushita Electric Ind Co Ltd | 光ディスク装置 |
US8045436B2 (en) * | 2007-11-29 | 2011-10-25 | Mediatek Inc. | Method and apparatus for adjusting focus offset based on target condition |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4998233A (en) * | 1988-02-12 | 1991-03-05 | International Business Machines Corporation | Acquiring focus in optical systems using a focus error signal and a laser drive signal |
US5251194A (en) * | 1989-04-17 | 1993-10-05 | Mitsubishi Denki Kabushiki Kaisha | Techniques for controlling beam position and focus in optical disk drives |
JPH02285526A (ja) * | 1989-04-27 | 1990-11-22 | Olympus Optical Co Ltd | トラッキングサーボループのオフセット補正装置 |
US5351224A (en) * | 1990-03-08 | 1994-09-27 | Oki Electric Industry Co., Ltd. | Adjustment of tracking servo and focusing servo in optical data recording/reproducing apparatus |
US5101395A (en) * | 1990-06-11 | 1992-03-31 | International Business Machines Corporation | Data detection employing high-speed baseline tracking compensation |
US5343454A (en) * | 1991-11-22 | 1994-08-30 | Matsushita Electric Industrial Co., Ltd. | Tracking control apparatus for correcting tracking error signal according to approximate equation of a function of track address |
JP2778389B2 (ja) * | 1992-11-05 | 1998-07-23 | 松下電器産業株式会社 | 光ディスク装置 |
JP3240016B2 (ja) * | 1993-05-11 | 2001-12-17 | ソニー株式会社 | 光デイスク装置及び光デイスク装置の評価方法 |
JP3489271B2 (ja) * | 1995-06-16 | 2004-01-19 | ソニー株式会社 | ディスク駆動装置および傾き調整方法 |
JP3384336B2 (ja) * | 1998-09-03 | 2003-03-10 | ティアック株式会社 | 情報記憶装置 |
JP4258046B2 (ja) * | 1998-11-17 | 2009-04-30 | ソニー株式会社 | ディスクドライブ装置 |
JP2001297454A (ja) * | 2000-04-14 | 2001-10-26 | Matsushita Electric Ind Co Ltd | 光ディスク装置 |
JP2003059068A (ja) * | 2001-08-22 | 2003-02-28 | Funai Electric Co Ltd | ディスク装置及びサーボ機構の調整方法 |
JP2003248942A (ja) * | 2002-02-25 | 2003-09-05 | Funai Electric Co Ltd | 光ディスク装置 |
TWI226606B (en) * | 2002-03-13 | 2005-01-11 | Via Tech Inc | Method for detecting AC signal and method for detecting DC level of AC signal |
-
2004
- 2004-08-06 TW TW093123723A patent/TW200509108A/zh unknown
- 2004-08-06 US US10/913,241 patent/US7626899B2/en active Active
- 2004-08-06 CN CN200410056402.XA patent/CN1272779C/zh active Active
Also Published As
Publication number | Publication date |
---|---|
US20050030848A1 (en) | 2005-02-10 |
CN1591613A (zh) | 2005-03-09 |
CN1272779C (zh) | 2006-08-30 |
US7626899B2 (en) | 2009-12-01 |
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