AT336298B - DEVICE FOR READING INFORMATION STORED ON A DISC-SHAPED RECORDING MEDIA - Google Patents
DEVICE FOR READING INFORMATION STORED ON A DISC-SHAPED RECORDING MEDIAInfo
- Publication number
- AT336298B AT336298B AT895674A AT895674A AT336298B AT 336298 B AT336298 B AT 336298B AT 895674 A AT895674 A AT 895674A AT 895674 A AT895674 A AT 895674A AT 336298 B AT336298 B AT 336298B
- Authority
- AT
- Austria
- Prior art keywords
- disc
- information stored
- recording media
- reading information
- shaped recording
- 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 (en) | 1973-11-10 | 1973-11-10 | DEVICE FOR READING A DISK-SHAPED REGISTRATION CARRIER. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ATA895674A ATA895674A (en) | 1976-08-15 |
| AT336298B true AT336298B (en) | 1977-04-25 |
Family
ID=19819976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT895674A AT336298B (en) | 1973-11-10 | 1974-11-08 | DEVICE FOR READING INFORMATION STORED ON A DISC-SHAPED RECORDING MEDIA |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS5433724B2 (en) |
| AR (1) | AR204426A1 (en) |
| AT (1) | AT336298B (en) |
| BE (1) | BE822040A (en) |
| BR (1) | BR7409349A (en) |
| CA (1) | CA1055156A (en) |
| CH (1) | CH579807A5 (en) |
| DE (1) | DE2452815C2 (en) |
| DK (1) | DK135070B (en) |
| ES (1) | ES431776A1 (en) |
| FR (1) | FR2251067B1 (en) |
| GB (1) | GB1490726A (en) |
| IT (1) | IT1024778B (en) |
| NL (1) | NL7315419A (en) |
| NO (1) | NO144501C (en) |
| SE (1) | SE394335B (en) |
| ZA (1) | ZA746767B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0090420A1 (en) * | 1982-03-31 | 1983-10-05 | Hitachi, Ltd. | Device for optically recording and reading of information |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2396379A1 (en) * | 1977-07-01 | 1979-01-26 | Thomson Brandt | OPTICAL INFORMATION DISC READER EQUIPPED WITH AN AUTOMATIC INFORMATION ACCESS DEVICE |
| NL7803517A (en) * | 1978-04-03 | 1979-10-05 | Philips Nv | RECORD CARRIER WITH AN OPTICALLY READABLE PHASE STRUCTURE AND DEVICE FOR READING. |
| JPS626580Y2 (en) * | 1979-11-17 | 1987-02-16 | ||
| NL8001974A (en) * | 1980-04-03 | 1981-11-02 | Philips Nv | TRACKING DEVICE. |
| JPS57113428A (en) * | 1980-12-29 | 1982-07-14 | Pioneer Video Corp | Focus servo device |
| NL8105346A (en) * | 1981-11-26 | 1983-06-16 | ||
| NL8105347A (en) * | 1981-11-26 | 1983-06-16 | Philips Nv | Apparatus for the optical scanning of a disc-shaped record carrier. |
| NL8200208A (en) * | 1982-01-21 | 1983-08-16 | Philips Nv | DEVICE FOR READING A DISC REGISTRATION CARRIER. |
| JPS58143472A (en) * | 1982-02-22 | 1983-08-26 | Hitachi Ltd | Tracking servo controller of recording information reproducing device |
| GB8824888D0 (en) * | 1988-10-24 | 2002-08-14 | British Aerospace | Servo actuation systems |
-
1973
- 1973-11-10 NL NL7315419A patent/NL7315419A/en not_active Application Discontinuation
-
1974
- 1974-01-01 AR AR256416A patent/AR204426A1/en active
- 1974-10-24 ZA ZA00746767A patent/ZA746767B/en unknown
- 1974-11-04 CA CA212,960A patent/CA1055156A/en not_active Expired
- 1974-11-07 BR BR9349/74A patent/BR7409349A/en unknown
- 1974-11-07 DE DE2452815A patent/DE2452815C2/en not_active Expired
- 1974-11-07 JP JP12763274A patent/JPS5433724B2/ja not_active Expired
- 1974-11-07 GB GB48309/74A patent/GB1490726A/en not_active Expired
- 1974-11-07 DK DK580974AA patent/DK135070B/en not_active IP Right Cessation
- 1974-11-07 IT IT70277/74A patent/IT1024778B/en active
- 1974-11-07 CH CH1490774A patent/CH579807A5/xx not_active IP Right Cessation
- 1974-11-07 NO NO744015A patent/NO144501C/en unknown
- 1974-11-07 SE SE7413962A patent/SE394335B/en not_active IP Right Cessation
- 1974-11-08 ES ES431776A patent/ES431776A1/en not_active Expired
- 1974-11-08 FR FR7437019A patent/FR2251067B1/fr not_active Expired
- 1974-11-08 BE BE150377A patent/BE822040A/en not_active IP Right Cessation
- 1974-11-08 AT AT895674A patent/AT336298B/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0090420A1 (en) * | 1982-03-31 | 1983-10-05 | Hitachi, Ltd. | Device for optically recording and reading of information |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2251067B1 (en) | 1983-08-05 |
| BE822040A (en) | 1975-05-09 |
| FR2251067A1 (en) | 1975-06-06 |
| DE2452815C2 (en) | 1982-10-28 |
| NL7315419A (en) | 1975-05-13 |
| JPS5081218A (en) | 1975-07-01 |
| DK580974A (en) | 1975-07-07 |
| NO144501B (en) | 1981-06-01 |
| ZA746767B (en) | 1976-05-26 |
| ATA895674A (en) | 1976-08-15 |
| IT1024778B (en) | 1978-07-20 |
| JPS5433724B2 (en) | 1979-10-23 |
| DK135070B (en) | 1977-02-28 |
| NO744015L (en) | 1975-06-09 |
| CA1055156A (en) | 1979-05-22 |
| SE7413962L (en) | 1975-05-12 |
| ES431776A1 (en) | 1976-12-16 |
| NO144501C (en) | 1981-09-09 |
| DE2452815A1 (en) | 1975-06-26 |
| AU7515574A (en) | 1976-05-13 |
| GB1490726A (en) | 1977-11-02 |
| AR204426A1 (en) | 1976-02-06 |
| DK135070C (en) | 1977-08-01 |
| CH579807A5 (en) | 1976-09-15 |
| BR7409349A (en) | 1976-05-18 |
| SE394335B (en) | 1977-06-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ELJ | Ceased due to non-payment of the annual fee |