CA1040741A - Device for optically scanning an information track on a rotating information carrier - Google Patents
Device for optically scanning an information track on a rotating information carrierInfo
- Publication number
- CA1040741A CA1040741A CA211,612A CA211612A CA1040741A CA 1040741 A CA1040741 A CA 1040741A CA 211612 A CA211612 A CA 211612A CA 1040741 A CA1040741 A CA 1040741A
- Authority
- CA
- Canada
- Prior art keywords
- information track
- track
- information
- signal
- light beam
- 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
- 238000010894 electron beam technology Methods 0.000 claims abstract description 12
- 230000033001 locomotion Effects 0.000 description 2
- KRTSDMXIXPKRQR-AATRIKPKSA-N monocrotophos Chemical compound CNC(=O)\C=C(/C)OP(=O)(OC)OC KRTSDMXIXPKRQR-AATRIKPKSA-N 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- VOXZDWNPVJITMN-ZBRFXRBCSA-N 17β-estradiol Chemical compound OC1=CC=C2[C@H]3CC[C@](C)([C@H](CC4)O)[C@@H]4[C@@H]3CCC2=C1 VOXZDWNPVJITMN-ZBRFXRBCSA-N 0.000 description 1
- 241000353097 Molva molva Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 101150008263 accD gene Proteins 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 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)
- 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 |
|---|---|
| CA1040741A true CA1040741A (en) | 1978-10-17 |
Family
ID=19819855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA211,612A Expired CA1040741A (en) | 1973-10-20 | 1974-10-17 | Device for optically scanning an information track on a rotating information carrier |
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 DK DK545474A patent/DK545474A/da unknown
- 1974-10-17 SE SE7413069A patent/SE7413069L/xx unknown
- 1974-10-17 BR BR8645/74A patent/BR7408645D0/pt unknown
- 1974-10-17 GB GB4509174A patent/GB1475179A/en not_active Expired
- 1974-10-17 AT AT835874A patent/AT339390B/de not_active IP Right Cessation
- 1974-10-17 NO NO743762A patent/NO743762L/no unknown
- 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 CH CH1394474A patent/CH574151A5/xx not_active IP Right Cessation
- 1974-10-17 IT IT70103/74A patent/IT1024629B/it active
- 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 |
|---|---|
| BR7408645D0 (pt) | 1975-08-05 |
| ATA835874A (de) | 1977-02-15 |
| ES431129A1 (es) | 1976-11-01 |
| NL7314464A (nl) | 1975-04-22 |
| BE821269A (fr) | 1975-04-18 |
| AT339390B (de) | 1977-10-10 |
| DK545474A (da) | 1975-06-30 |
| AU7442874A (en) | 1976-04-29 |
| NO743762L (da) | 1975-05-20 |
| JPS5068731A (da) | 1975-06-09 |
| IT1024629B (it) | 1978-07-20 |
| SE7413069L (da) | 1975-04-21 |
| FR2248569B1 (da) | 1979-08-24 |
| DE2448792A1 (de) | 1975-05-28 |
| FR2248569A1 (da) | 1975-05-16 |
| GB1475179A (en) | 1977-06-01 |
| CH574151A5 (da) | 1976-03-31 |
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