IT1024778B - Dispositivo lettore ottico per supporti di registrazione a forma di disco - Google Patents
Dispositivo lettore ottico per supporti di registrazione a forma di discoInfo
- Publication number
- IT1024778B IT1024778B IT70277/74A IT7027774A IT1024778B IT 1024778 B IT1024778 B IT 1024778B IT 70277/74 A IT70277/74 A IT 70277/74A IT 7027774 A IT7027774 A IT 7027774A IT 1024778 B IT1024778 B IT 1024778B
- Authority
- IT
- Italy
- Prior art keywords
- disc
- recording media
- reader device
- shaped recording
- optical reader
- 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
- 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 (1)
| Publication Number | Publication Date |
|---|---|
| IT1024778B true IT1024778B (it) | 1978-07-20 |
Family
ID=19819976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT70277/74A IT1024778B (it) | 1973-11-10 | 1974-11-07 | Dispositivo lettore ottico per supporti di registrazione a forma di disco |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS5433724B2 (nl) |
| AR (1) | AR204426A1 (nl) |
| AT (1) | AT336298B (nl) |
| BE (1) | BE822040A (nl) |
| BR (1) | BR7409349A (nl) |
| CA (1) | CA1055156A (nl) |
| CH (1) | CH579807A5 (nl) |
| DE (1) | DE2452815C2 (nl) |
| DK (1) | DK135070B (nl) |
| ES (1) | ES431776A1 (nl) |
| FR (1) | FR2251067B1 (nl) |
| GB (1) | GB1490726A (nl) |
| IT (1) | IT1024778B (nl) |
| NL (1) | NL7315419A (nl) |
| NO (1) | NO144501C (nl) |
| SE (1) | SE394335B (nl) |
| ZA (1) | ZA746767B (nl) |
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 (nl) * | 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 (nl) * | 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/nl 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 DE DE2452815A patent/DE2452815C2/de not_active Expired
- 1974-11-07 CH CH1490774A patent/CH579807A5/xx not_active IP Right Cessation
- 1974-11-07 NO NO744015A patent/NO144501C/no unknown
- 1974-11-07 SE SE7413962A patent/SE394335B/xx not_active IP Right Cessation
- 1974-11-07 GB GB48309/74A patent/GB1490726A/en not_active Expired
- 1974-11-07 JP JP12763274A patent/JPS5433724B2/ja not_active Expired
- 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 BR BR9349/74A patent/BR7409349A/pt unknown
- 1974-11-08 BE BE150377A patent/BE822040A/xx not_active IP Right Cessation
- 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 FR FR7437019A patent/FR2251067B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1490726A (en) | 1977-11-02 |
| FR2251067A1 (nl) | 1975-06-06 |
| CA1055156A (en) | 1979-05-22 |
| SE7413962L (nl) | 1975-05-12 |
| DK135070C (nl) | 1977-08-01 |
| SE394335B (sv) | 1977-06-20 |
| DK580974A (nl) | 1975-07-07 |
| DK135070B (da) | 1977-02-28 |
| DE2452815C2 (de) | 1982-10-28 |
| FR2251067B1 (nl) | 1983-08-05 |
| JPS5433724B2 (nl) | 1979-10-23 |
| AT336298B (de) | 1977-04-25 |
| ATA895674A (de) | 1976-08-15 |
| ES431776A1 (es) | 1976-12-16 |
| BE822040A (fr) | 1975-05-09 |
| DE2452815A1 (de) | 1975-06-26 |
| ZA746767B (en) | 1976-05-26 |
| BR7409349A (pt) | 1976-05-18 |
| AU7515574A (en) | 1976-05-13 |
| NO144501C (no) | 1981-09-09 |
| AR204426A1 (es) | 1976-02-06 |
| NO744015L (nl) | 1975-06-09 |
| JPS5081218A (nl) | 1975-07-01 |
| NO144501B (no) | 1981-06-01 |
| CH579807A5 (nl) | 1976-09-15 |
| NL7315419A (nl) | 1975-05-13 |
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