JPS5081218A - - Google Patents
Info
- Publication number
- JPS5081218A JPS5081218A JP49127632A JP12763274A JPS5081218A JP S5081218 A JPS5081218 A JP S5081218A JP 49127632 A JP49127632 A JP 49127632A JP 12763274 A JP12763274 A JP 12763274A JP S5081218 A JPS5081218 A JP S5081218A
- Authority
- JP
- Japan
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Holo Graphy (AREA)
- Recording Measured Values (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 (2)
Publication Number | Publication Date |
---|---|
JPS5081218A true JPS5081218A (no) | 1975-07-01 |
JPS5433724B2 JPS5433724B2 (no) | 1979-10-23 |
Family
ID=19819976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12763274A Expired JPS5433724B2 (no) | 1973-11-10 | 1974-11-07 |
Country Status (17)
Country | Link |
---|---|
JP (1) | JPS5433724B2 (no) |
AR (1) | AR204426A1 (no) |
AT (1) | AT336298B (no) |
BE (1) | BE822040A (no) |
BR (1) | BR7409349A (no) |
CA (1) | CA1055156A (no) |
CH (1) | CH579807A5 (no) |
DE (1) | DE2452815C2 (no) |
DK (1) | DK135070B (no) |
ES (1) | ES431776A1 (no) |
FR (1) | FR2251067B1 (no) |
GB (1) | GB1490726A (no) |
IT (1) | IT1024778B (no) |
NL (1) | NL7315419A (no) |
NO (1) | NO144501C (no) |
SE (1) | SE394335B (no) |
ZA (1) | ZA746767B (no) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (10)
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 (no) * | 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 |
NL8105346A (no) * | 1981-11-26 | 1983-06-16 | ||
NL8105347A (nl) * | 1981-11-26 | 1983-06-16 | Philips Nv | Inrichting voor het optisch aftasten van een schijfvormige registratiedrager. |
NL8200208A (nl) * | 1982-01-21 | 1983-08-16 | Philips Nv | Inrichting voor het uitlezen van een schijfvormige registratiedrager. |
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 BR BR9349/74A patent/BR7409349A/pt unknown
- 1974-11-07 SE SE7413962A patent/SE394335B/xx not_active IP Right Cessation
- 1974-11-07 NO NO744015A patent/NO144501C/no unknown
- 1974-11-07 DE DE2452815A patent/DE2452815C2/de not_active Expired
- 1974-11-07 IT IT70277/74A patent/IT1024778B/it active
- 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 DK DK580974AA patent/DK135070B/da not_active IP Right Cessation
- 1974-11-08 AT AT895674A patent/AT336298B/de not_active IP Right Cessation
- 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 BE BE150377A patent/BE822040A/xx not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
JPH0237027B2 (no) * | 1982-02-22 | 1990-08-22 | Hitachi Ltd |
Also Published As
Publication number | Publication date |
---|---|
NO744015L (no) | 1975-06-09 |
IT1024778B (it) | 1978-07-20 |
JPS5433724B2 (no) | 1979-10-23 |
AT336298B (de) | 1977-04-25 |
DK135070B (da) | 1977-02-28 |
FR2251067A1 (no) | 1975-06-06 |
CH579807A5 (no) | 1976-09-15 |
GB1490726A (en) | 1977-11-02 |
NO144501C (no) | 1981-09-09 |
DE2452815A1 (de) | 1975-06-26 |
SE7413962L (no) | 1975-05-12 |
CA1055156A (en) | 1979-05-22 |
SE394335B (sv) | 1977-06-20 |
BE822040A (fr) | 1975-05-09 |
DK580974A (no) | 1975-07-07 |
ATA895674A (de) | 1976-08-15 |
DK135070C (no) | 1977-08-01 |
FR2251067B1 (no) | 1983-08-05 |
DE2452815C2 (de) | 1982-10-28 |
NL7315419A (nl) | 1975-05-13 |
NO144501B (no) | 1981-06-01 |
ES431776A1 (es) | 1976-12-16 |
AR204426A1 (es) | 1976-02-06 |
BR7409349A (pt) | 1976-05-18 |
AU7515574A (en) | 1976-05-13 |
ZA746767B (en) | 1976-05-26 |