JPH0359491B2 - - Google Patents
Info
- Publication number
- JPH0359491B2 JPH0359491B2 JP14959682A JP14959682A JPH0359491B2 JP H0359491 B2 JPH0359491 B2 JP H0359491B2 JP 14959682 A JP14959682 A JP 14959682A JP 14959682 A JP14959682 A JP 14959682A JP H0359491 B2 JPH0359491 B2 JP H0359491B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- focus
- circuit
- disk
- focus pull
- 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
- 230000003287 optical effect Effects 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 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
- G11B7/0945—Methods for initialising servos, start-up sequences
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14959682A JPS5938931A (ja) | 1982-08-28 | 1982-08-28 | 光学式デイスク再生装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14959682A JPS5938931A (ja) | 1982-08-28 | 1982-08-28 | 光学式デイスク再生装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5938931A JPS5938931A (ja) | 1984-03-03 |
| JPH0359491B2 true JPH0359491B2 (enrdf_load_stackoverflow) | 1991-09-10 |
Family
ID=15478658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14959682A Granted JPS5938931A (ja) | 1982-08-28 | 1982-08-28 | 光学式デイスク再生装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5938931A (enrdf_load_stackoverflow) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62259230A (ja) * | 1986-05-06 | 1987-11-11 | Pioneer Electronic Corp | 車載用デイスクプレ−ヤ |
| US5189290A (en) * | 1989-10-14 | 1993-02-23 | Omron Corporation | Optical card processing apparatus using tracking error signals to determine proper card orientation |
-
1982
- 1982-08-28 JP JP14959682A patent/JPS5938931A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5938931A (ja) | 1984-03-03 |
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