DK545474A - - Google Patents
Info
- Publication number
- DK545474A DK545474A DK545474A DK545474A DK545474A DK 545474 A DK545474 A DK 545474A DK 545474 A DK545474 A DK 545474A DK 545474 A DK545474 A DK 545474A DK 545474 A DK545474 A DK 545474A
- Authority
- DK
- Denmark
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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7314464A NL7314464A (nl) | 1973-10-20 | 1973-10-20 | Inrichting voor het optisch aftasten van een informa- tiespoor op een roterende informatiedrager. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK545474A true DK545474A (xx) | 1975-06-30 |
Family
ID=19819855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK545474A DK545474A (xx) | 1973-10-20 | 1974-10-17 |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5068731A (xx) |
| AT (1) | AT339390B (xx) |
| BE (1) | BE821269A (xx) |
| BR (1) | BR7408645D0 (xx) |
| CA (1) | CA1040741A (xx) |
| CH (1) | CH574151A5 (xx) |
| DE (1) | DE2448792A1 (xx) |
| DK (1) | DK545474A (xx) |
| ES (1) | ES431129A1 (xx) |
| FR (1) | FR2248569B1 (xx) |
| GB (1) | GB1475179A (xx) |
| IT (1) | IT1024629B (xx) |
| NL (1) | NL7314464A (xx) |
| NO (1) | NO743762L (xx) |
| SE (1) | SE7413069L (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5270990A (en) * | 1986-08-15 | 1993-12-14 | Canon Kabushiki Kaisha | Tracking error signal detecting apparatus using an electron beam and apparatus for effecting recording/reproduction of information by the utilization of a plurality of electron beams |
-
1973
- 1973-10-20 NL NL7314464A patent/NL7314464A/xx not_active Application Discontinuation
-
1974
- 1974-10-12 DE DE19742448792 patent/DE2448792A1/de not_active Withdrawn
- 1974-10-17 AT AT835874A patent/AT339390B/de not_active IP Right Cessation
- 1974-10-17 BR BR8645/74A patent/BR7408645D0/pt unknown
- 1974-10-17 SE SE7413069A patent/SE7413069L/xx unknown
- 1974-10-17 JP JP49118787A patent/JPS5068731A/ja active Pending
- 1974-10-17 DK DK545474A patent/DK545474A/da unknown
- 1974-10-17 CH CH1394474A patent/CH574151A5/xx not_active IP Right Cessation
- 1974-10-17 CA CA211,612A patent/CA1040741A/en not_active Expired
- 1974-10-17 GB GB4509174A patent/GB1475179A/en not_active Expired
- 1974-10-17 IT IT70103/74A patent/IT1024629B/it active
- 1974-10-17 NO NO743762A patent/NO743762L/no unknown
- 1974-10-18 ES ES431129A patent/ES431129A1/es not_active Expired
- 1974-10-18 BE BE149705A patent/BE821269A/xx unknown
- 1974-10-21 FR FR7435270A patent/FR2248569B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NO743762L (xx) | 1975-05-20 |
| ATA835874A (de) | 1977-02-15 |
| AT339390B (de) | 1977-10-10 |
| NL7314464A (nl) | 1975-04-22 |
| IT1024629B (it) | 1978-07-20 |
| CH574151A5 (xx) | 1976-03-31 |
| FR2248569B1 (xx) | 1979-08-24 |
| ES431129A1 (es) | 1976-11-01 |
| BE821269A (fr) | 1975-04-18 |
| AU7442874A (en) | 1976-04-29 |
| GB1475179A (en) | 1977-06-01 |
| DE2448792A1 (de) | 1975-05-28 |
| CA1040741A (en) | 1978-10-17 |
| JPS5068731A (xx) | 1975-06-09 |
| BR7408645D0 (pt) | 1975-08-05 |
| SE7413069L (xx) | 1975-04-21 |
| FR2248569A1 (xx) | 1975-05-16 |