CH574151A5 - - Google Patents
Info
- Publication number
- CH574151A5 CH574151A5 CH1394474A CH1394474A CH574151A5 CH 574151 A5 CH574151 A5 CH 574151A5 CH 1394474 A CH1394474 A CH 1394474A CH 1394474 A CH1394474 A CH 1394474A CH 574151 A5 CH574151 A5 CH 574151A5
- Authority
- CH
- Switzerland
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)
- Length Measuring Devices By Optical Means (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7314464A NL7314464A (en) | 1973-10-20 | 1973-10-20 | DEVICE FOR OPTICAL SCANNING OF AN INFORMATION TRACK ON A ROTATING INFORMATION CARRIER. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH574151A5 true CH574151A5 (en) | 1976-03-31 |
Family
ID=19819855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1394474A CH574151A5 (en) | 1973-10-20 | 1974-10-17 |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5068731A (en) |
| AT (1) | AT339390B (en) |
| BE (1) | BE821269A (en) |
| BR (1) | BR7408645D0 (en) |
| CA (1) | CA1040741A (en) |
| CH (1) | CH574151A5 (en) |
| DE (1) | DE2448792A1 (en) |
| DK (1) | DK545474A (en) |
| ES (1) | ES431129A1 (en) |
| FR (1) | FR2248569B1 (en) |
| GB (1) | GB1475179A (en) |
| IT (1) | IT1024629B (en) |
| NL (1) | NL7314464A (en) |
| NO (1) | NO743762L (en) |
| SE (1) | SE7413069L (en) |
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/en not_active Application Discontinuation
-
1974
- 1974-10-12 DE DE19742448792 patent/DE2448792A1/en not_active Withdrawn
- 1974-10-17 NO NO743762A patent/NO743762L/no unknown
- 1974-10-17 JP JP49118787A patent/JPS5068731A/ja active Pending
- 1974-10-17 SE SE7413069A patent/SE7413069L/xx unknown
- 1974-10-17 DK DK545474A patent/DK545474A/da unknown
- 1974-10-17 AT AT835874A patent/AT339390B/en not_active IP Right Cessation
- 1974-10-17 BR BR8645/74A patent/BR7408645D0/en unknown
- 1974-10-17 CH CH1394474A patent/CH574151A5/xx not_active IP Right Cessation
- 1974-10-17 GB GB4509174A patent/GB1475179A/en not_active Expired
- 1974-10-17 CA CA211,612A patent/CA1040741A/en not_active Expired
- 1974-10-17 IT IT70103/74A patent/IT1024629B/en active
- 1974-10-18 BE BE149705A patent/BE821269A/en unknown
- 1974-10-18 ES ES431129A patent/ES431129A1/en not_active Expired
- 1974-10-21 FR FR7435270A patent/FR2248569B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2448792A1 (en) | 1975-05-28 |
| CA1040741A (en) | 1978-10-17 |
| JPS5068731A (en) | 1975-06-09 |
| BR7408645D0 (en) | 1975-08-05 |
| ES431129A1 (en) | 1976-11-01 |
| AU7442874A (en) | 1976-04-29 |
| NO743762L (en) | 1975-05-20 |
| DK545474A (en) | 1975-06-30 |
| ATA835874A (en) | 1977-02-15 |
| SE7413069L (en) | 1975-04-21 |
| AT339390B (en) | 1977-10-10 |
| FR2248569A1 (en) | 1975-05-16 |
| FR2248569B1 (en) | 1979-08-24 |
| GB1475179A (en) | 1977-06-01 |
| NL7314464A (en) | 1975-04-22 |
| BE821269A (en) | 1975-04-18 |
| IT1024629B (en) | 1978-07-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |