IT1024629B - Dispositivo per la scansione ottica di una pista di informazione su un sopporto rotante - Google Patents
Dispositivo per la scansione ottica di una pista di informazione su un sopporto rotanteInfo
- Publication number
- IT1024629B IT1024629B IT70103/74A IT7010374A IT1024629B IT 1024629 B IT1024629 B IT 1024629B IT 70103/74 A IT70103/74 A IT 70103/74A IT 7010374 A IT7010374 A IT 7010374A IT 1024629 B IT1024629 B IT 1024629B
- Authority
- IT
- Italy
- Prior art keywords
- optical scanning
- rotating support
- information track
- track
- information
- 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
- G11B7/12—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 (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 |
|---|---|
| IT1024629B true IT1024629B (it) | 1978-07-20 |
Family
ID=19819855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT70103/74A IT1024629B (it) | 1973-10-20 | 1974-10-17 | Dispositivo per la scansione ottica di una pista di informazione su un sopporto rotante |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5068731A (it) |
| AT (1) | AT339390B (it) |
| BE (1) | BE821269A (it) |
| BR (1) | BR7408645D0 (it) |
| CA (1) | CA1040741A (it) |
| CH (1) | CH574151A5 (it) |
| DE (1) | DE2448792A1 (it) |
| DK (1) | DK545474A (it) |
| ES (1) | ES431129A1 (it) |
| FR (1) | FR2248569B1 (it) |
| GB (1) | GB1475179A (it) |
| IT (1) | IT1024629B (it) |
| NL (1) | NL7314464A (it) |
| NO (1) | NO743762L (it) |
| SE (1) | SE7413069L (it) |
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 JP JP49118787A patent/JPS5068731A/ja active Pending
- 1974-10-17 SE SE7413069A patent/SE7413069L/xx unknown
- 1974-10-17 NO NO743762A patent/NO743762L/no unknown
- 1974-10-17 DK DK545474A patent/DK545474A/da unknown
- 1974-10-17 IT IT70103/74A patent/IT1024629B/it active
- 1974-10-17 BR BR8645/74A patent/BR7408645D0/pt unknown
- 1974-10-17 AT AT835874A patent/AT339390B/de 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 CH CH1394474A patent/CH574151A5/xx not_active IP Right Cessation
- 1974-10-18 BE BE149705A patent/BE821269A/xx unknown
- 1974-10-18 ES ES431129A patent/ES431129A1/es not_active Expired
- 1974-10-21 FR FR7435270A patent/FR2248569B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2248569B1 (it) | 1979-08-24 |
| SE7413069L (it) | 1975-04-21 |
| CA1040741A (en) | 1978-10-17 |
| CH574151A5 (it) | 1976-03-31 |
| GB1475179A (en) | 1977-06-01 |
| BE821269A (fr) | 1975-04-18 |
| BR7408645D0 (pt) | 1975-08-05 |
| ES431129A1 (es) | 1976-11-01 |
| FR2248569A1 (it) | 1975-05-16 |
| DK545474A (it) | 1975-06-30 |
| AT339390B (de) | 1977-10-10 |
| AU7442874A (en) | 1976-04-29 |
| DE2448792A1 (de) | 1975-05-28 |
| ATA835874A (de) | 1977-02-15 |
| JPS5068731A (it) | 1975-06-09 |
| NO743762L (it) | 1975-05-20 |
| NL7314464A (nl) | 1975-04-22 |
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