ES431129A1 - Un dispositivo para explorar opticamente una pista de in- formacion sobre un portador de informacion rotatorio. - Google Patents
Un dispositivo para explorar opticamente una pista de in- formacion sobre un portador de informacion rotatorio.Info
- Publication number
- ES431129A1 ES431129A1 ES431129A ES431129A ES431129A1 ES 431129 A1 ES431129 A1 ES 431129A1 ES 431129 A ES431129 A ES 431129A ES 431129 A ES431129 A ES 431129A ES 431129 A1 ES431129 A1 ES 431129A1
- Authority
- ES
- Spain
- Prior art keywords
- information track
- signal
- light beam
- optical scanning
- information
- Prior art date
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 title 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
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 |
|---|---|
| ES431129A1 true ES431129A1 (es) | 1976-11-01 |
Family
ID=19819855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES431129A Expired ES431129A1 (es) | 1973-10-20 | 1974-10-18 | Un dispositivo para explorar opticamente una pista de in- formacion sobre un portador de informacion rotatorio. |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5068731A (da) |
| AT (1) | AT339390B (da) |
| BE (1) | BE821269A (da) |
| BR (1) | BR7408645D0 (da) |
| CA (1) | CA1040741A (da) |
| CH (1) | CH574151A5 (da) |
| DE (1) | DE2448792A1 (da) |
| DK (1) | DK545474A (da) |
| ES (1) | ES431129A1 (da) |
| FR (1) | FR2248569B1 (da) |
| GB (1) | GB1475179A (da) |
| IT (1) | IT1024629B (da) |
| NL (1) | NL7314464A (da) |
| NO (1) | NO743762L (da) |
| SE (1) | SE7413069L (da) |
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 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 JP JP49118787A patent/JPS5068731A/ja active Pending
- 1974-10-17 NO NO743762A patent/NO743762L/no unknown
- 1974-10-17 BR BR8645/74A patent/BR7408645D0/pt unknown
- 1974-10-17 SE SE7413069A patent/SE7413069L/xx unknown
- 1974-10-17 GB GB4509174A patent/GB1475179A/en not_active Expired
- 1974-10-17 IT IT70103/74A patent/IT1024629B/it active
- 1974-10-17 DK DK545474A patent/DK545474A/da 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 |
|---|---|
| GB1475179A (en) | 1977-06-01 |
| CH574151A5 (da) | 1976-03-31 |
| ATA835874A (de) | 1977-02-15 |
| NO743762L (da) | 1975-05-20 |
| DE2448792A1 (de) | 1975-05-28 |
| AT339390B (de) | 1977-10-10 |
| SE7413069L (da) | 1975-04-21 |
| DK545474A (da) | 1975-06-30 |
| BR7408645D0 (pt) | 1975-08-05 |
| AU7442874A (en) | 1976-04-29 |
| BE821269A (fr) | 1975-04-18 |
| FR2248569A1 (da) | 1975-05-16 |
| FR2248569B1 (da) | 1979-08-24 |
| JPS5068731A (da) | 1975-06-09 |
| CA1040741A (en) | 1978-10-17 |
| NL7314464A (nl) | 1975-04-22 |
| IT1024629B (it) | 1978-07-20 |
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