DE69218275T2 - Gerät zur Erfassung der Lage eines Lichtflecks - Google Patents
Gerät zur Erfassung der Lage eines LichtflecksInfo
- Publication number
- DE69218275T2 DE69218275T2 DE69218275T DE69218275T DE69218275T2 DE 69218275 T2 DE69218275 T2 DE 69218275T2 DE 69218275 T DE69218275 T DE 69218275T DE 69218275 T DE69218275 T DE 69218275T DE 69218275 T2 DE69218275 T2 DE 69218275T2
- Authority
- DE
- Germany
- Prior art keywords
- detecting
- light spot
- spot
- light
- 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
- G11B7/0901—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
- G11B7/08—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
- G11B7/08517—Methods for track change, selection or preliminary positioning by moving the head with tracking 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
- G11B7/094—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
- G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Moving Of Head For Track Selection And Changing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3009958A JP2935908B2 (ja) | 1991-01-30 | 1991-01-30 | 光スポット位置検出装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69218275D1 DE69218275D1 (de) | 1997-04-24 |
DE69218275T2 true DE69218275T2 (de) | 1997-09-18 |
Family
ID=11734456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69218275T Expired - Fee Related DE69218275T2 (de) | 1991-01-30 | 1992-01-28 | Gerät zur Erfassung der Lage eines Lichtflecks |
Country Status (4)
Country | Link |
---|---|
US (1) | US5212675A (de) |
EP (1) | EP0497548B1 (de) |
JP (1) | JP2935908B2 (de) |
DE (1) | DE69218275T2 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06162542A (ja) * | 1992-11-24 | 1994-06-10 | Pioneer Electron Corp | 光ディスク装置 |
JPH06301990A (ja) * | 1993-04-12 | 1994-10-28 | Rohm Co Ltd | 光ピックアップ |
JPH06342522A (ja) * | 1993-05-18 | 1994-12-13 | Nec Corp | 光ディスクのクロストークキャンセル装置 |
US5519679A (en) * | 1994-10-12 | 1996-05-21 | Eastman Kodak Company | Apparatus and method for multi-spot sampled tracking in an optical data storage system |
JP3846925B2 (ja) * | 1995-12-22 | 2006-11-15 | パイオニア株式会社 | トラッキングエラー信号の波形制御装置 |
US6181667B1 (en) * | 1997-03-14 | 2001-01-30 | Sanyo Electric Co., Ltd. | Optical pickup apparatus capable of suppressing offset of a tracking error signal |
JP2000298858A (ja) * | 1999-04-15 | 2000-10-24 | Funai Electric Co Ltd | 光ディスク装置の制御方法 |
US6744712B2 (en) * | 2001-01-29 | 2004-06-01 | Hewlett-Packard Development Company, L.P. | Optical disc drive with satellite beams for generation of quadrature error signals for radial position detection |
JP2002319151A (ja) * | 2001-04-24 | 2002-10-31 | Sharp Corp | 光ピックアップ装置 |
US7474235B2 (en) * | 2006-06-05 | 2009-01-06 | Mediatek Inc. | Automatic power control system for optical disc drive and method thereof |
US7911891B2 (en) * | 2006-06-05 | 2011-03-22 | Mediatek Inc. | Apparatus for controling servo signal gains of an optical disc drive and method of same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3672426D1 (de) * | 1985-09-27 | 1990-08-09 | Sharp Kk | Spurnachlaufverfahren fuer eine optische speicherplatte. |
DE3732899A1 (de) * | 1987-09-30 | 1989-04-20 | Thomson Brandt Gmbh | Spurregelkreis fuer eine optische abtastvorrichtung |
JP2745665B2 (ja) * | 1989-04-14 | 1998-04-28 | ソニー株式会社 | 光学式記録再生装置のデトラック検出方法 |
JP2684763B2 (ja) * | 1989-04-24 | 1997-12-03 | ソニー株式会社 | 光学記録および/または再生装置 |
JP2651454B2 (ja) * | 1989-05-18 | 1997-09-10 | 株式会社アサカ | マルチビーム光ディスク装置のトラッキング誤差検出部 |
JPH035927A (ja) * | 1989-06-01 | 1991-01-11 | Sony Corp | 光学記録および/または再生装置 |
JPH0354733A (ja) * | 1989-07-21 | 1991-03-08 | Sony Corp | 光学記録および/または再生装置 |
TW221074B (de) * | 1991-05-10 | 1994-02-11 | Philips Nv |
-
1991
- 1991-01-30 JP JP3009958A patent/JP2935908B2/ja not_active Expired - Lifetime
-
1992
- 1992-01-23 US US07/824,602 patent/US5212675A/en not_active Expired - Fee Related
- 1992-01-28 DE DE69218275T patent/DE69218275T2/de not_active Expired - Fee Related
- 1992-01-28 EP EP92300706A patent/EP0497548B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH04313820A (ja) | 1992-11-05 |
US5212675A (en) | 1993-05-18 |
EP0497548B1 (de) | 1997-03-19 |
EP0497548A1 (de) | 1992-08-05 |
JP2935908B2 (ja) | 1999-08-16 |
DE69218275D1 (de) | 1997-04-24 |
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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 |