GB8505488D0 - Servo error reduction apparatus - Google Patents
Servo error reduction apparatusInfo
- Publication number
- GB8505488D0 GB8505488D0 GB858505488A GB8505488A GB8505488D0 GB 8505488 D0 GB8505488 D0 GB 8505488D0 GB 858505488 A GB858505488 A GB 858505488A GB 8505488 A GB8505488 A GB 8505488A GB 8505488 D0 GB8505488 D0 GB 8505488D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- reduction apparatus
- servo error
- error reduction
- servo
- reduction
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
- G11B21/106—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following on disks
-
- 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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0953—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US60741084A | 1984-05-07 | 1984-05-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8505488D0 true GB8505488D0 (en) | 1985-04-03 |
GB2158611A GB2158611A (en) | 1985-11-13 |
Family
ID=24432147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08505488A Withdrawn GB2158611A (en) | 1984-05-07 | 1985-03-04 | Servo error reduction apparatus for disc record playback system |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS60246026A (en) |
DE (1) | DE3507976A1 (en) |
FR (1) | FR2563935A1 (en) |
GB (1) | GB2158611A (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1261467A (en) * | 1985-11-28 | 1989-09-26 | Akira Minami | Focus servomechanism control system of optical disc system having offset setting means |
JPS62145570A (en) * | 1985-12-19 | 1987-06-29 | Victor Co Of Japan Ltd | Disk driving device |
JP2525782B2 (en) * | 1986-09-20 | 1996-08-21 | パイオニア株式会社 | Servo device in recording disk reproducing device |
JPH0770087B2 (en) * | 1986-09-20 | 1995-07-31 | パイオニア株式会社 | Servo device in recording disk reproducing device |
US5077719A (en) * | 1987-08-28 | 1991-12-31 | Fujitsu Limited | Optical disk access system |
NL8702261A (en) * | 1987-09-23 | 1989-04-17 | Philips Nv | RECORDING INFORMATION AND / OR READING SYSTEM, AND A RECORD BRACKET AND RECORDING AND / OR READING DEVICE FOR USE IN SUCH A SYSTEM. |
US5251194A (en) * | 1989-04-17 | 1993-10-05 | Mitsubishi Denki Kabushiki Kaisha | Techniques for controlling beam position and focus in optical disk drives |
DE69028035T2 (en) * | 1989-04-28 | 1997-01-16 | Canon Kk | Optical information recording / reproducing device with digital servo device for focusing and / or tracking an optical head, based on digital information |
JPH0373420A (en) * | 1989-04-28 | 1991-03-28 | Canon Inc | Optical information recording and reproducing device |
ATE126919T1 (en) * | 1989-12-04 | 1995-09-15 | Thomson Brandt Gmbh | TRACKING CONTROL SYSTEM FOR AN OPTICAL RECORDING AND SCANNING UNIT. |
DE4103974A1 (en) * | 1991-02-09 | 1992-08-13 | Thomson Brandt Gmbh | OPTICAL RECORDING AND / OR PLAYBACK DEVICE |
JP3263258B2 (en) * | 1994-09-30 | 2002-03-04 | 富士通株式会社 | Method and apparatus for detecting actuator offset amount of optical disk device |
KR100400045B1 (en) * | 2001-09-03 | 2003-09-29 | 삼성전자주식회사 | Apparatus and method for excluding disturbance |
EP1553572A1 (en) * | 2004-01-08 | 2005-07-13 | Deutsche Thomson-Brandt Gmbh | Method for compensating deviations of an optical recording medium |
JP4826354B2 (en) * | 2005-09-12 | 2011-11-30 | ソニー株式会社 | Control circuit and optical disk apparatus |
JP2009123267A (en) * | 2007-11-13 | 2009-06-04 | Funai Electric Co Ltd | Optical disc playback device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1576426A (en) * | 1976-03-19 | 1980-10-08 | Rca Corp | Eccentricity compensating system in recording and playbackapparatus |
NL7711634A (en) * | 1977-10-24 | 1979-04-26 | Philips Nv | TACHOMETER SYSTEM. |
JPS5753830A (en) * | 1980-09-12 | 1982-03-31 | Sony Corp | Tracking servo device for optical information signal reproducer |
US4536809A (en) * | 1982-05-10 | 1985-08-20 | Digital Equipment Corporation | Adaptive misposition correcting method and apparatus for magnetic disk servo system |
-
1985
- 1985-03-04 GB GB08505488A patent/GB2158611A/en not_active Withdrawn
- 1985-03-06 DE DE19853507976 patent/DE3507976A1/en not_active Ceased
- 1985-03-06 FR FR8503309A patent/FR2563935A1/en not_active Withdrawn
- 1985-03-07 JP JP4630685A patent/JPS60246026A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE3507976A1 (en) | 1985-11-07 |
FR2563935A1 (en) | 1985-11-08 |
GB2158611A (en) | 1985-11-13 |
JPS60246026A (en) | 1985-12-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |