IT7821384A0 - EQUIPMENT FOR READING A RECORDING MEDIA REFLECTING OPTICAL RADIATION. - Google Patents
EQUIPMENT FOR READING A RECORDING MEDIA REFLECTING OPTICAL RADIATION.Info
- Publication number
- IT7821384A0 IT7821384A0 IT7821384A IT2138478A IT7821384A0 IT 7821384 A0 IT7821384 A0 IT 7821384A0 IT 7821384 A IT7821384 A IT 7821384A IT 2138478 A IT2138478 A IT 2138478A IT 7821384 A0 IT7821384 A0 IT 7821384A0
- Authority
- IT
- Italy
- Prior art keywords
- reading
- equipment
- recording media
- optical radiation
- reflecting optical
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title 1
- 230000005855 radiation Effects 0.000 title 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
- G11B7/08—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 (2)
| 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. |
| NL7706753A NL7706753A (en) | 1977-03-23 | 1977-06-20 | DEVICE FOR READING AN OPTICAL RADIATION-REFLECTING INFORMATION CARRIER. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT7821384A0 true IT7821384A0 (en) | 1978-03-20 |
| IT1093249B IT1093249B (en) | 1985-07-19 |
Family
ID=26645307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT21384/78A IT1093249B (en) | 1977-03-23 | 1978-03-20 | APPARATUS TO READ A REELECTIVE RECORDING SUPPORT FOR OPTICAL RADIATIONS |
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 |
| US4630927A (en) * | 1983-02-15 | 1986-12-23 | General Electric Company | Optical projector |
| JPS59125727U (en) * | 1983-02-15 | 1984-08-24 | パイオニア株式会社 | Optical information pickup device |
| 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 GB GB10887/78A patent/GB1589035A/en not_active Expired
- 1978-03-20 BR BR7801692A patent/BR7801692A/en unknown
- 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 JP JP53032272A patent/JPS6028055B2/en not_active Expired
- 1978-03-20 DK DK124478A patent/DK124478A/en unknown
- 1978-03-20 SE SE7803140A patent/SE424677B/en not_active IP Right Cessation
- 1978-03-20 DD DD78204290A patent/DD135654A5/en unknown
- 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 |
|---|---|
| DD135654A5 (en) | 1979-05-16 |
| BE865140A (en) | 1978-09-21 |
| SE424677B (en) | 1982-08-02 |
| NL7706753A (en) | 1978-12-22 |
| SE7803140L (en) | 1978-09-24 |
| FR2385173B1 (en) | 1985-05-10 |
| ES468083A1 (en) | 1978-12-16 |
| AT371275B (en) | 1983-06-10 |
| CA1116294A (en) | 1982-01-12 |
| AU3429278A (en) | 1979-09-27 |
| DK124478A (en) | 1978-09-24 |
| DE2810566C2 (en) | 1988-01-21 |
| FR2385173A1 (en) | 1978-10-20 |
| IT1093249B (en) | 1985-07-19 |
| JPS53118103A (en) | 1978-10-16 |
| DE2810566A1 (en) | 1978-09-28 |
| ATA200278A (en) | 1982-10-15 |
| BR7801692A (en) | 1979-01-02 |
| AR217276A1 (en) | 1980-03-14 |
| GB1589035A (en) | 1981-05-07 |
| JPS6028055B2 (en) | 1985-07-02 |
| AU516903B2 (en) | 1981-06-25 |
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