WO2002019325A1 - Procede et dispositif de detection de l'ecart de position d'une lentille dans une unite de disque optique - Google Patents
Procede et dispositif de detection de l'ecart de position d'une lentille dans une unite de disque optique Download PDFInfo
- Publication number
- WO2002019325A1 WO2002019325A1 PCT/JP2001/006838 JP0106838W WO0219325A1 WO 2002019325 A1 WO2002019325 A1 WO 2002019325A1 JP 0106838 W JP0106838 W JP 0106838W WO 0219325 A1 WO0219325 A1 WO 0219325A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens
- signal
- positional deviation
- optical disk
- disk unit
- Prior art date
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
- G11B7/0901—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
-
- 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
- G11B7/094—Methods and circuits for servo offset compensation
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU77724/01A AU7772401A (en) | 2000-08-28 | 2001-08-09 | Method and device for detecting positional deviation of lens in optical disk unit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000-257385 | 2000-08-28 | ||
| JP2000257385 | 2000-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002019325A1 true WO2002019325A1 (fr) | 2002-03-07 |
Family
ID=18745849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2001/006838 WO2002019325A1 (fr) | 2000-08-28 | 2001-08-09 | Procede et dispositif de detection de l'ecart de position d'une lentille dans une unite de disque optique |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU7772401A (ja) |
| WO (1) | WO2002019325A1 (ja) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61195523U (ja) * | 1985-05-29 | 1986-12-05 | ||
| JPS62180529A (ja) * | 1986-02-05 | 1987-08-07 | Hitachi Ltd | 一定線速度方式の光デイスクフアイル装置 |
| JP2000215474A (ja) * | 1999-01-21 | 2000-08-04 | Asahi Optical Co Ltd | 光ディスク用センサシステム |
-
2001
- 2001-08-09 WO PCT/JP2001/006838 patent/WO2002019325A1/ja not_active Application Discontinuation
- 2001-08-09 AU AU77724/01A patent/AU7772401A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61195523U (ja) * | 1985-05-29 | 1986-12-05 | ||
| JPS62180529A (ja) * | 1986-02-05 | 1987-08-07 | Hitachi Ltd | 一定線速度方式の光デイスクフアイル装置 |
| JP2000215474A (ja) * | 1999-01-21 | 2000-08-04 | Asahi Optical Co Ltd | 光ディスク用センサシステム |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7772401A (en) | 2002-03-13 |
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