DK476786D0 - Fokusregulering til et apparat til pladeformige roterende informationsbaerere - Google Patents
Fokusregulering til et apparat til pladeformige roterende informationsbaerereInfo
- Publication number
- DK476786D0 DK476786D0 DK476786A DK476786A DK476786D0 DK 476786 D0 DK476786 D0 DK 476786D0 DK 476786 A DK476786 A DK 476786A DK 476786 A DK476786 A DK 476786A DK 476786 D0 DK476786 D0 DK 476786D0
- Authority
- DK
- Denmark
- Prior art keywords
- pct
- plate
- information carriers
- platform rotating
- rotating information
- 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
-
- 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
- G11B7/0948—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 detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts
-
- 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
- G11B7/0908—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
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853503983 DE3503983A1 (de) | 1985-02-06 | 1985-02-06 | Fokus-regelung fuer ein geraet fuer plattenfoermige, rotierende informationstraeger |
| PCT/EP1986/000029 WO1986004721A1 (en) | 1985-02-06 | 1986-01-24 | Focus regulation for an apparatus for disc-shaped rotating information supports |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK476786D0 true DK476786D0 (da) | 1986-10-06 |
| DK476786A DK476786A (da) | 1986-10-06 |
Family
ID=6261797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK476786A DK476786A (da) | 1985-02-06 | 1986-10-06 | Fokusregulering til et apparat til pladeformige roterende informationsbaerere |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4809253A (ja) |
| EP (1) | EP0211912B1 (ja) |
| JP (1) | JPS62501737A (ja) |
| KR (1) | KR920002555B1 (ja) |
| AT (1) | ATE56559T1 (ja) |
| DE (2) | DE3503983A1 (ja) |
| DK (1) | DK476786A (ja) |
| SG (1) | SG8992G (ja) |
| WO (1) | WO1986004721A1 (ja) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4974221A (en) * | 1987-07-17 | 1990-11-27 | Canon Kabushiki Kaisha | Method and apparatus for reproducing information by varying a sensitivity of a phase-locked loop in accordance with a detection state of a reproduced signal |
| US4941139A (en) * | 1988-09-02 | 1990-07-10 | International Business Machines Corporation | Checking media operations and recording during optical recording |
| US5018126A (en) * | 1988-09-02 | 1991-05-21 | International Business Machines Corporation | Checking media operations and recording during optical recording |
| CA2015267A1 (en) * | 1989-05-26 | 1990-11-26 | Rainer Seele | 8-azolylmethylquinolines |
| DE4102857A1 (de) * | 1991-01-31 | 1992-08-06 | Thomson Brandt Gmbh | Verfahren zum fokussieren eines lichtstrahls |
| EP0911713B1 (en) * | 1997-10-21 | 2004-09-22 | Deutsche Thomson-Brandt Gmbh | Corrected servo control signal in a servo control loop |
| EP0911712A1 (en) | 1997-10-21 | 1999-04-28 | Deutsche Thomson-Brandt Gmbh | Corrected servo control signal in a servo control loop |
| WO2002025640A2 (en) * | 2000-09-21 | 2002-03-28 | Gsi Lumonics Corporation | Digital control servo system |
| JP2002109822A (ja) * | 2000-09-29 | 2002-04-12 | Fujitsu Ltd | 回転制御方法及び記憶装置 |
| GB0313887D0 (en) * | 2003-06-16 | 2003-07-23 | Gsi Lumonics Ltd | Monitoring and controlling of laser operation |
| DE602005011248D1 (de) * | 2004-01-23 | 2009-01-08 | Gsi Group Corp | System und verfahren zum optimieren der zeichenmarkierungsleistung |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57113428A (en) * | 1980-12-29 | 1982-07-14 | Pioneer Video Corp | Focus servo device |
| US4406000A (en) * | 1981-03-31 | 1983-09-20 | Discovision Associates | Tracking system for optical record medium |
| US4414655A (en) * | 1981-03-31 | 1983-11-08 | Discovision Associates | Scanning beam control system |
| DE3280137D1 (de) * | 1981-09-17 | 1990-04-19 | Toshiba Kawasaki Kk | Ein optischer kopf. |
| JPS58189842A (ja) * | 1982-04-30 | 1983-11-05 | Toshiba Corp | 光学式デジタルデイスクプレ−ヤ装置 |
| DE3367134D1 (en) * | 1982-05-31 | 1986-11-27 | Hitachi Ltd | Servo circuit for a signal reproducing apparatus |
| JPS59152573A (ja) * | 1983-02-19 | 1984-08-31 | Sony Corp | 情報再生装置のサ−ボコントロ−ル回路 |
| DE3340712A1 (de) * | 1982-11-11 | 1984-05-17 | Sony Corp., Tokio/Tokyo | Spurhalteschaltung fuer optische wiedergabegeraete |
| NL8300291A (nl) * | 1983-01-27 | 1984-08-16 | Philips Nv | Inrichting voor het uitlezen van een optische registratiedrager. |
| JPS59157854A (ja) * | 1983-02-28 | 1984-09-07 | Sony Corp | 光学式デイスク・プレ−ヤ−の制御装置 |
| JPS59229773A (ja) * | 1983-06-10 | 1984-12-24 | Pioneer Electronic Corp | 記録情報読取装置 |
| JP2548106B2 (ja) * | 1984-05-23 | 1996-10-30 | ソニー株式会社 | 光学式デイスクプレ−ヤのトラツキング・サ−ボコントロ−ル装置 |
| US4701603A (en) * | 1985-10-17 | 1987-10-20 | Optical Disc Corporation | Focus control system for optical information recorder or player |
-
1985
- 1985-02-06 DE DE19853503983 patent/DE3503983A1/de not_active Withdrawn
-
1986
- 1986-01-24 WO PCT/EP1986/000029 patent/WO1986004721A1/de active IP Right Grant
- 1986-01-24 AT AT86901367T patent/ATE56559T1/de not_active IP Right Cessation
- 1986-01-24 EP EP86901367A patent/EP0211912B1/de not_active Expired - Lifetime
- 1986-01-24 US US06/925,090 patent/US4809253A/en not_active Expired - Lifetime
- 1986-01-24 JP JP61501349A patent/JPS62501737A/ja active Pending
- 1986-01-24 DE DE8686901367T patent/DE3674108D1/de not_active Expired - Lifetime
- 1986-01-24 KR KR1019860700686A patent/KR920002555B1/ko not_active IP Right Cessation
- 1986-10-06 DK DK476786A patent/DK476786A/da not_active Application Discontinuation
-
1992
- 1992-01-31 SG SG89/92A patent/SG8992G/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0211912B1 (de) | 1990-09-12 |
| US4809253A (en) | 1989-02-28 |
| SG8992G (en) | 1992-03-20 |
| ATE56559T1 (de) | 1990-09-15 |
| KR880700397A (ko) | 1988-03-15 |
| DK476786A (da) | 1986-10-06 |
| WO1986004721A1 (en) | 1986-08-14 |
| JPS62501737A (ja) | 1987-07-09 |
| KR920002555B1 (ko) | 1992-03-27 |
| DE3503983A1 (de) | 1986-08-07 |
| DE3674108D1 (de) | 1990-10-18 |
| EP0211912A1 (de) | 1987-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AHS | Application shelved for other reasons than non-payment |