FR2251067A1 - - Google Patents
Info
- Publication number
- FR2251067A1 FR2251067A1 FR7437019A FR7437019A FR2251067A1 FR 2251067 A1 FR2251067 A1 FR 2251067A1 FR 7437019 A FR7437019 A FR 7437019A FR 7437019 A FR7437019 A FR 7437019A FR 2251067 A1 FR2251067 A1 FR 2251067A1
- Authority
- FR
- France
- 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.)
- Granted
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
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 (2)
| Publication Number | Publication Date |
|---|---|
| FR2251067A1 true FR2251067A1 (xx) | 1975-06-06 |
| FR2251067B1 FR2251067B1 (xx) | 1983-08-05 |
Family
ID=19819976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7437019A Expired FR2251067B1 (xx) | 1973-11-10 | 1974-11-08 |
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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2422220A1 (fr) * | 1978-04-03 | 1979-11-02 | Philips Nv | Porteur d'enregistrement presentant une structure de phase a lire par voie optique et dispositif pour la lecture |
| FR2480016A1 (fr) * | 1980-04-03 | 1981-10-09 | Philips Nv | Dispositif de poursuite de piste d'information sur disque |
| FR2520145A1 (fr) * | 1982-01-21 | 1983-07-22 | Philips Nv | Dispositif de lecture d'un support d'information en forme de disque |
Families Citing this family (8)
| 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 |
| JPS626580Y2 (xx) * | 1979-11-17 | 1987-02-16 | ||
| 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 | ||
| 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 CH CH1490774A patent/CH579807A5/xx not_active IP Right Cessation
- 1974-11-07 JP JP12763274A patent/JPS5433724B2/ja not_active Expired
- 1974-11-07 IT IT70277/74A patent/IT1024778B/it active
- 1974-11-07 BR BR9349/74A patent/BR7409349A/pt unknown
- 1974-11-07 DE DE2452815A patent/DE2452815C2/de not_active Expired
- 1974-11-07 GB GB48309/74A patent/GB1490726A/en not_active Expired
- 1974-11-07 DK DK580974AA patent/DK135070B/da not_active IP Right Cessation
- 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 AT AT895674A patent/AT336298B/de not_active IP Right Cessation
- 1974-11-08 ES ES431776A patent/ES431776A1/es not_active Expired
- 1974-11-08 BE BE150377A patent/BE822040A/xx not_active IP Right Cessation
- 1974-11-08 FR FR7437019A patent/FR2251067B1/fr not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2422220A1 (fr) * | 1978-04-03 | 1979-11-02 | Philips Nv | Porteur d'enregistrement presentant une structure de phase a lire par voie optique et dispositif pour la lecture |
| FR2480016A1 (fr) * | 1980-04-03 | 1981-10-09 | Philips Nv | Dispositif de poursuite de piste d'information sur disque |
| FR2520145A1 (fr) * | 1982-01-21 | 1983-07-22 | Philips Nv | Dispositif de lecture d'un support d'information en forme de disque |
Also Published As
| Publication number | Publication date |
|---|---|
| SE7413962L (xx) | 1975-05-12 |
| JPS5433724B2 (xx) | 1979-10-23 |
| GB1490726A (en) | 1977-11-02 |
| DE2452815C2 (de) | 1982-10-28 |
| CA1055156A (en) | 1979-05-22 |
| NO144501C (no) | 1981-09-09 |
| NO744015L (xx) | 1975-06-09 |
| BE822040A (fr) | 1975-05-09 |
| NO144501B (no) | 1981-06-01 |
| SE394335B (sv) | 1977-06-20 |
| FR2251067B1 (xx) | 1983-08-05 |
| IT1024778B (it) | 1978-07-20 |
| JPS5081218A (xx) | 1975-07-01 |
| AT336298B (de) | 1977-04-25 |
| BR7409349A (pt) | 1976-05-18 |
| DK135070B (da) | 1977-02-28 |
| ZA746767B (en) | 1976-05-26 |
| DK580974A (xx) | 1975-07-07 |
| DE2452815A1 (de) | 1975-06-26 |
| NL7315419A (nl) | 1975-05-13 |
| AR204426A1 (es) | 1976-02-06 |
| CH579807A5 (xx) | 1976-09-15 |
| ES431776A1 (es) | 1976-12-16 |
| DK135070C (xx) | 1977-08-01 |
| AU7515574A (en) | 1976-05-13 |
| ATA895674A (de) | 1976-08-15 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |