AU3429278A - Optically reading a record carrier - Google Patents
Optically reading a record carrierInfo
- Publication number
- AU3429278A AU3429278A AU34292/78A AU3429278A AU3429278A AU 3429278 A AU3429278 A AU 3429278A AU 34292/78 A AU34292/78 A AU 34292/78A AU 3429278 A AU3429278 A AU 3429278A AU 3429278 A AU3429278 A AU 3429278A
- Authority
- AU
- Australia
- Prior art keywords
- record carrier
- optically reading
- optically
- reading
- record
- 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.)
- Granted
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
- G11B7/08—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
- G11B7/0908—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 focusing only
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
-
- 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
- G11B7/0908—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 focusing only
-
- 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
- G11B7/0908—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 focusing only
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
- G11B2007/0924—Skewed beams methods (using an angled beam, i.e. a beam which is reflected from the disc at an angle different from 90°)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7703123A NL7703123A (en) | 1977-03-23 | 1977-03-23 | DEVICE FOR READING AN OPTICAL RADIATION-REFLECTING REGISTRATION CARRIER. |
| NLNL7703123 | 1977-03-23 | ||
| NL7706753A NL7706753A (en) | 1977-03-23 | 1977-06-20 | DEVICE FOR READING AN OPTICAL RADIATION-REFLECTING INFORMATION CARRIER. |
| NLNL7706753 | 1977-06-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU3429278A true AU3429278A (en) | 1979-09-27 |
| AU516903B2 AU516903B2 (en) | 1981-06-25 |
Family
ID=26645307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU34292/78A Expired AU516903B2 (en) | 1977-03-23 | 1978-03-20 | Optically reading a record carrier |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS6028055B2 (en) |
| AR (1) | AR217276A1 (en) |
| AT (1) | AT371275B (en) |
| AU (1) | AU516903B2 (en) |
| BE (1) | BE865140A (en) |
| BR (1) | BR7801692A (en) |
| CA (1) | CA1116294A (en) |
| DD (1) | DD135654A5 (en) |
| DE (1) | DE2810566A1 (en) |
| DK (1) | DK124478A (en) |
| ES (1) | ES468083A1 (en) |
| FR (1) | FR2385173A1 (en) |
| GB (1) | GB1589035A (en) |
| IT (1) | IT1093249B (en) |
| NL (1) | NL7706753A (en) |
| SE (1) | SE424677B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7809635A (en) * | 1978-09-22 | 1980-03-25 | Philips Nv | DEVICE FOR READING AN OPTICAL REGISTRATION CARRIER CONTAINING A RADIATION-REFLECTING INFORMATION STRUCTURE. |
| NL186353C (en) * | 1979-06-12 | 1990-11-01 | Philips Nv | DEVICE FOR IMAGING A MASK PATTERN ON A SUBSTRATE EQUIPPED WITH AN OPTO-ELECTRONIC DETECTION SYSTEM FOR DETERMINING A DEROGATION BETWEEN THE IMAGE OF A PROJECT SYSTEM AND THE SUBSTRATE PLATE. |
| FR2460523A1 (en) * | 1979-06-29 | 1981-01-23 | Thomson Csf | SEMICONDUCTOR LASER SOURCE OPTICAL READING HEAD AND DEVICE FOR REFLECTING AN INFORMATION MEDIUM COMPRISING SUCH AN OPTICAL HEAD |
| JPS5870434A (en) * | 1981-10-22 | 1983-04-26 | Toshiba Corp | Optical head |
| JPS57186240A (en) * | 1981-11-09 | 1982-11-16 | Teac Co | Optical reproducing device |
| JPS59119548A (en) * | 1982-12-25 | 1984-07-10 | Pioneer Electronic Corp | Optical pickup device |
| JPS59125727U (en) * | 1983-02-15 | 1984-08-24 | パイオニア株式会社 | Optical information pickup device |
| US4630927A (en) * | 1983-02-15 | 1986-12-23 | General Electric Company | Optical projector |
| JPS60197950A (en) * | 1984-03-22 | 1985-10-07 | Toshiba Corp | Optical head |
| JPH0626972Y2 (en) * | 1986-10-03 | 1994-07-20 | パイオニア株式会社 | Optical pickup device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2313716A1 (en) * | 1975-06-03 | 1976-12-31 | Thomson Brandt | OPTICAL READING SYSTEM BY REFLECTION OF AN INFORMATION MEDIA |
-
1977
- 1977-06-20 NL NL7706753A patent/NL7706753A/en not_active Application Discontinuation
-
1978
- 1978-02-16 AR AR271114A patent/AR217276A1/en active
- 1978-03-11 DE DE19782810566 patent/DE2810566A1/en active Granted
- 1978-03-15 CA CA299,001A patent/CA1116294A/en not_active Expired
- 1978-03-20 DD DD78204290A patent/DD135654A5/en unknown
- 1978-03-20 GB GB10887/78A patent/GB1589035A/en not_active Expired
- 1978-03-20 DK DK124478A patent/DK124478A/en unknown
- 1978-03-20 BR BR7801692A patent/BR7801692A/en unknown
- 1978-03-20 JP JP53032272A patent/JPS6028055B2/en not_active Expired
- 1978-03-20 IT IT21384/78A patent/IT1093249B/en active
- 1978-03-20 AU AU34292/78A patent/AU516903B2/en not_active Expired
- 1978-03-20 SE SE7803140A patent/SE424677B/en not_active IP Right Cessation
- 1978-03-21 AT AT0200278A patent/AT371275B/en active
- 1978-03-21 ES ES468083A patent/ES468083A1/en not_active Expired
- 1978-03-21 BE BE186137A patent/BE865140A/en not_active IP Right Cessation
- 1978-03-22 FR FR7808297A patent/FR2385173A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| AU516903B2 (en) | 1981-06-25 |
| FR2385173B1 (en) | 1985-05-10 |
| ATA200278A (en) | 1982-10-15 |
| NL7706753A (en) | 1978-12-22 |
| BR7801692A (en) | 1979-01-02 |
| AT371275B (en) | 1983-06-10 |
| DK124478A (en) | 1978-09-24 |
| AR217276A1 (en) | 1980-03-14 |
| FR2385173A1 (en) | 1978-10-20 |
| JPS53118103A (en) | 1978-10-16 |
| GB1589035A (en) | 1981-05-07 |
| ES468083A1 (en) | 1978-12-16 |
| IT1093249B (en) | 1985-07-19 |
| DE2810566A1 (en) | 1978-09-28 |
| DE2810566C2 (en) | 1988-01-21 |
| SE7803140L (en) | 1978-09-24 |
| CA1116294A (en) | 1982-01-12 |
| SE424677B (en) | 1982-08-02 |
| JPS6028055B2 (en) | 1985-07-02 |
| DD135654A5 (en) | 1979-05-16 |
| IT7821384A0 (en) | 1978-03-20 |
| BE865140A (en) | 1978-09-21 |
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