JPS6223376B2 - - Google Patents
Info
- Publication number
- JPS6223376B2 JPS6223376B2 JP4909481A JP4909481A JPS6223376B2 JP S6223376 B2 JPS6223376 B2 JP S6223376B2 JP 4909481 A JP4909481 A JP 4909481A JP 4909481 A JP4909481 A JP 4909481A JP S6223376 B2 JPS6223376 B2 JP S6223376B2
- Authority
- JP
- Japan
- Prior art keywords
- tracking error
- signal
- light
- differential
- target object
- 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
- 238000000605 extraction Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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
- G11B7/094—Methods and circuits for servo offset compensation
-
- 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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0956—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4909481A JPS57164448A (en) | 1981-03-31 | 1981-03-31 | Position detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4909481A JPS57164448A (en) | 1981-03-31 | 1981-03-31 | Position detecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57164448A JPS57164448A (en) | 1982-10-09 |
| JPS6223376B2 true JPS6223376B2 (en]) | 1987-05-22 |
Family
ID=12821502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4909481A Granted JPS57164448A (en) | 1981-03-31 | 1981-03-31 | Position detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57164448A (en]) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH029973U (en]) * | 1988-06-28 | 1990-01-23 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58125242A (ja) * | 1982-01-22 | 1983-07-26 | Victor Co Of Japan Ltd | 光学的情報信号再生装置のトラツキング誤差検出方式 |
| JPS58194146A (ja) * | 1982-04-30 | 1983-11-12 | Sharp Corp | 光学式デイスクプレ−ヤにおけるトラツキング制御装置 |
| JPS6040534A (ja) * | 1983-08-16 | 1985-03-02 | Ricoh Co Ltd | トラツキング制御方法及び装置 |
-
1981
- 1981-03-31 JP JP4909481A patent/JPS57164448A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH029973U (en]) * | 1988-06-28 | 1990-01-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57164448A (en) | 1982-10-09 |
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