CA1055156A - Apparatus for reading a disc-shaped record carrier - Google Patents
Apparatus for reading a disc-shaped record carrierInfo
- Publication number
- CA1055156A CA1055156A CA212,960A CA212960A CA1055156A CA 1055156 A CA1055156 A CA 1055156A CA 212960 A CA212960 A CA 212960A CA 1055156 A CA1055156 A CA 1055156A
- Authority
- CA
- Canada
- Prior art keywords
- control signal
- signal
- control
- detector
- radiation
- 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
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
- G11B7/0948—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
- G11B7/0901—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
- G11B7/09—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
- G11B7/0946—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 operation during external perturbations not related to the carrier or servo beam, e.g. vibration
Landscapes
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Recording Measured Values (AREA)
- Holo Graphy (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7315419A NL7315419A (nl) | 1973-11-10 | 1973-11-10 | Inrichting voor het uitlezen van een schijfvor- mige registratiedrager. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1055156A true CA1055156A (en) | 1979-05-22 |
Family
ID=19819976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA212,960A Expired CA1055156A (en) | 1973-11-10 | 1974-11-04 | Apparatus for reading a disc-shaped record carrier |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS5433724B2 (xx) |
| AR (1) | AR204426A1 (xx) |
| AT (1) | AT336298B (xx) |
| BE (1) | BE822040A (xx) |
| BR (1) | BR7409349A (xx) |
| CA (1) | CA1055156A (xx) |
| CH (1) | CH579807A5 (xx) |
| DE (1) | DE2452815C2 (xx) |
| DK (1) | DK135070B (xx) |
| ES (1) | ES431776A1 (xx) |
| FR (1) | FR2251067B1 (xx) |
| GB (1) | GB1490726A (xx) |
| IT (1) | IT1024778B (xx) |
| NL (1) | NL7315419A (xx) |
| NO (1) | NO144501C (xx) |
| SE (1) | SE394335B (xx) |
| ZA (1) | ZA746767B (xx) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2396379A1 (fr) * | 1977-07-01 | 1979-01-26 | Thomson Brandt | Lecteur optique de disque d'information muni d'un dispositif d'acces automatique aux informations |
| NL7803517A (nl) * | 1978-04-03 | 1979-10-05 | Philips Nv | Registratiedrager met een optisch uitleesbare fase- struktuur en inrichting voor het uitlezen. |
| JPS626580Y2 (xx) * | 1979-11-17 | 1987-02-16 | ||
| NL8001974A (nl) * | 1980-04-03 | 1981-11-02 | Philips Nv | Spoorvolginrichting. |
| JPS57113428A (en) * | 1980-12-29 | 1982-07-14 | Pioneer Video Corp | Focus servo device |
| NL8105347A (nl) * | 1981-11-26 | 1983-06-16 | Philips Nv | Inrichting voor het optisch aftasten van een schijfvormige registratiedrager. |
| NL8105346A (xx) * | 1981-11-26 | 1983-06-16 | ||
| NL8200208A (nl) * | 1982-01-21 | 1983-08-16 | Philips Nv | Inrichting voor het uitlezen van een schijfvormige registratiedrager. |
| JPS58143472A (ja) * | 1982-02-22 | 1983-08-26 | Hitachi Ltd | 記録情報再生装置のトラツキングサ−ボ制御装置 |
| JPS58169350A (ja) * | 1982-03-31 | 1983-10-05 | Hitachi Ltd | 光学的情報記録再生装置 |
| GB8824888D0 (en) * | 1988-10-24 | 2002-08-14 | British Aerospace | Servo actuation systems |
-
1973
- 1973-11-10 NL NL7315419A patent/NL7315419A/xx not_active Application Discontinuation
-
1974
- 1974-01-01 AR AR256416A patent/AR204426A1/es active
- 1974-10-24 ZA ZA00746767A patent/ZA746767B/xx unknown
- 1974-11-04 CA CA212,960A patent/CA1055156A/en not_active Expired
- 1974-11-07 JP JP12763274A patent/JPS5433724B2/ja not_active Expired
- 1974-11-07 DE DE2452815A patent/DE2452815C2/de not_active Expired
- 1974-11-07 CH CH1490774A patent/CH579807A5/xx not_active IP Right Cessation
- 1974-11-07 GB GB48309/74A patent/GB1490726A/en not_active Expired
- 1974-11-07 BR BR9349/74A patent/BR7409349A/pt unknown
- 1974-11-07 DK DK580974AA patent/DK135070B/da not_active IP Right Cessation
- 1974-11-07 IT IT70277/74A patent/IT1024778B/it active
- 1974-11-07 SE SE7413962A patent/SE394335B/xx not_active IP Right Cessation
- 1974-11-07 NO NO744015A patent/NO144501C/no unknown
- 1974-11-08 FR FR7437019A patent/FR2251067B1/fr not_active Expired
- 1974-11-08 ES ES431776A patent/ES431776A1/es not_active Expired
- 1974-11-08 AT AT895674A patent/AT336298B/de not_active IP Right Cessation
- 1974-11-08 BE BE150377A patent/BE822040A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATA895674A (de) | 1976-08-15 |
| DE2452815C2 (de) | 1982-10-28 |
| DK135070B (da) | 1977-02-28 |
| FR2251067B1 (xx) | 1983-08-05 |
| AT336298B (de) | 1977-04-25 |
| BR7409349A (pt) | 1976-05-18 |
| AR204426A1 (es) | 1976-02-06 |
| ES431776A1 (es) | 1976-12-16 |
| JPS5433724B2 (xx) | 1979-10-23 |
| FR2251067A1 (xx) | 1975-06-06 |
| IT1024778B (it) | 1978-07-20 |
| DK135070C (xx) | 1977-08-01 |
| BE822040A (fr) | 1975-05-09 |
| DK580974A (xx) | 1975-07-07 |
| ZA746767B (en) | 1976-05-26 |
| SE7413962L (xx) | 1975-05-12 |
| NO744015L (xx) | 1975-06-09 |
| AU7515574A (en) | 1976-05-13 |
| NO144501C (no) | 1981-09-09 |
| DE2452815A1 (de) | 1975-06-26 |
| JPS5081218A (xx) | 1975-07-01 |
| SE394335B (sv) | 1977-06-20 |
| NL7315419A (nl) | 1975-05-13 |
| CH579807A5 (xx) | 1976-09-15 |
| NO144501B (no) | 1981-06-01 |
| GB1490726A (en) | 1977-11-02 |
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