CA1116294A - Apparatus for reading an optical radiation-reflecting record carrier - Google Patents
Apparatus for reading an optical radiation-reflecting record carrierInfo
- Publication number
- CA1116294A CA1116294A CA299,001A CA299001A CA1116294A CA 1116294 A CA1116294 A CA 1116294A CA 299001 A CA299001 A CA 299001A CA 1116294 A CA1116294 A CA 1116294A
- Authority
- CA
- Canada
- Prior art keywords
- radiation
- focussing
- read
- spot
- detectors
- 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
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 |
|---|---|---|---|
| NL7703123 | 1977-03-23 | ||
| NL7703123A NL7703123A (nl) | 1977-03-23 | 1977-03-23 | Inrichting voor het uitlezen van een optische stralingsreflekterende registratiedrager. |
| NL7706753A NL7706753A (nl) | 1977-03-23 | 1977-06-20 | Inrichting voor het uitlezen van een optische stralingsreflekterende informatiedrager. |
| NL7706753 | 1977-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1116294A true CA1116294A (en) | 1982-01-12 |
Family
ID=26645307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA299,001A Expired CA1116294A (en) | 1977-03-23 | 1978-03-15 | Apparatus for reading an optical radiation-reflecting record carrier |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS6028055B2 (sv) |
| AR (1) | AR217276A1 (sv) |
| AT (1) | AT371275B (sv) |
| AU (1) | AU516903B2 (sv) |
| BE (1) | BE865140A (sv) |
| BR (1) | BR7801692A (sv) |
| CA (1) | CA1116294A (sv) |
| DD (1) | DD135654A5 (sv) |
| DE (1) | DE2810566A1 (sv) |
| DK (1) | DK124478A (sv) |
| ES (1) | ES468083A1 (sv) |
| FR (1) | FR2385173A1 (sv) |
| GB (1) | GB1589035A (sv) |
| IT (1) | IT1093249B (sv) |
| NL (1) | NL7706753A (sv) |
| SE (1) | SE424677B (sv) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7809635A (nl) * | 1978-09-22 | 1980-03-25 | Philips Nv | Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur. |
| NL186353C (nl) * | 1979-06-12 | 1990-11-01 | Philips Nv | Inrichting voor het afbeelden van een maskerpatroon op een substraat voorzien van een opto-elektronisch detektiestelsel voor het bepalen van een afwijking tussen het beeldvlak van een projektielenzenstelsel en het substraatvlak. |
| FR2460523A1 (fr) * | 1979-06-29 | 1981-01-23 | Thomson Csf | Tete de lecture optique a source laser a semi-conducteur et dispositif de lecture par reflexion d'un support d'information comportant une telle tete optique |
| JPS5870434A (ja) * | 1981-10-22 | 1983-04-26 | Toshiba Corp | 光学ヘツド |
| JPS57186240A (en) * | 1981-11-09 | 1982-11-16 | Teac Co | Optical reproducing device |
| JPS59119548A (ja) * | 1982-12-25 | 1984-07-10 | Pioneer Electronic Corp | 光学式ピツクアツプ装置 |
| JPS59125727U (ja) * | 1983-02-15 | 1984-08-24 | パイオニア株式会社 | 光学式情報ピツクアツプ装置 |
| US4630927A (en) * | 1983-02-15 | 1986-12-23 | General Electric Company | Optical projector |
| JPS60197950A (ja) * | 1984-03-22 | 1985-10-07 | Toshiba Corp | 光学ヘツド |
| JPH0626972Y2 (ja) * | 1986-10-03 | 1994-07-20 | パイオニア株式会社 | 光学式ピツクアツプ装置 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2313716A1 (fr) * | 1975-06-03 | 1976-12-31 | Thomson Brandt | Systeme optique de lecture par reflexion d'un support d'information |
-
1977
- 1977-06-20 NL NL7706753A patent/NL7706753A/xx not_active Application Discontinuation
-
1978
- 1978-02-16 AR AR271114A patent/AR217276A1/es active
- 1978-03-11 DE DE19782810566 patent/DE2810566A1/de active Granted
- 1978-03-15 CA CA299,001A patent/CA1116294A/en not_active Expired
- 1978-03-20 DK DK124478A patent/DK124478A/da unknown
- 1978-03-20 SE SE7803140A patent/SE424677B/sv not_active IP Right Cessation
- 1978-03-20 GB GB10887/78A patent/GB1589035A/en not_active Expired
- 1978-03-20 AU AU34292/78A patent/AU516903B2/en not_active Expired
- 1978-03-20 DD DD78204290A patent/DD135654A5/xx unknown
- 1978-03-20 BR BR7801692A patent/BR7801692A/pt unknown
- 1978-03-20 JP JP53032272A patent/JPS6028055B2/ja not_active Expired
- 1978-03-20 IT IT21384/78A patent/IT1093249B/it active
- 1978-03-21 BE BE186137A patent/BE865140A/xx not_active IP Right Cessation
- 1978-03-21 AT AT0200278A patent/AT371275B/de active
- 1978-03-21 ES ES468083A patent/ES468083A1/es not_active Expired
- 1978-03-22 FR FR7808297A patent/FR2385173A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| BE865140A (fr) | 1978-09-21 |
| JPS6028055B2 (ja) | 1985-07-02 |
| IT1093249B (it) | 1985-07-19 |
| DK124478A (da) | 1978-09-24 |
| AU3429278A (en) | 1979-09-27 |
| BR7801692A (pt) | 1979-01-02 |
| ES468083A1 (es) | 1978-12-16 |
| AT371275B (de) | 1983-06-10 |
| DD135654A5 (de) | 1979-05-16 |
| DE2810566C2 (sv) | 1988-01-21 |
| DE2810566A1 (de) | 1978-09-28 |
| ATA200278A (de) | 1982-10-15 |
| AR217276A1 (es) | 1980-03-14 |
| JPS53118103A (en) | 1978-10-16 |
| GB1589035A (en) | 1981-05-07 |
| FR2385173B1 (sv) | 1985-05-10 |
| IT7821384A0 (it) | 1978-03-20 |
| SE7803140L (sv) | 1978-09-24 |
| SE424677B (sv) | 1982-08-02 |
| FR2385173A1 (fr) | 1978-10-20 |
| NL7706753A (nl) | 1978-12-22 |
| AU516903B2 (en) | 1981-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |