JPS6256577B2 - - Google Patents
Info
- Publication number
- JPS6256577B2 JPS6256577B2 JP57154411A JP15441182A JPS6256577B2 JP S6256577 B2 JPS6256577 B2 JP S6256577B2 JP 57154411 A JP57154411 A JP 57154411A JP 15441182 A JP15441182 A JP 15441182A JP S6256577 B2 JPS6256577 B2 JP S6256577B2
- Authority
- JP
- Japan
- Prior art keywords
- actuator
- lens
- servo
- circuit
- output
- 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
- G11B7/0945—Methods for initialising servos, start-up sequences
Landscapes
- Automatic Focus Adjustment (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15441182A JPS5942649A (ja) | 1982-09-02 | 1982-09-02 | 光学的サ−ボ装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15441182A JPS5942649A (ja) | 1982-09-02 | 1982-09-02 | 光学的サ−ボ装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5942649A JPS5942649A (ja) | 1984-03-09 |
| JPS6256577B2 true JPS6256577B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1987-11-26 |
Family
ID=15583561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15441182A Granted JPS5942649A (ja) | 1982-09-02 | 1982-09-02 | 光学的サ−ボ装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5942649A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3508525A1 (de) * | 1985-03-09 | 1986-09-11 | Thomson Brandt Gmbh | Fokus-such-einrichtung fuer beruehrungslose abtastung |
| JPH0715756B2 (ja) * | 1985-06-12 | 1995-02-22 | 松下電器産業株式会社 | フォーカス制御装置 |
| JP3992044B2 (ja) | 2004-04-22 | 2007-10-17 | ソニー株式会社 | 再生装置、フォーカスジャンプ方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7813460L (sv) * | 1978-03-27 | 1979-09-28 | Mca Disco Vision | Videoskivspelare |
-
1982
- 1982-09-02 JP JP15441182A patent/JPS5942649A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5942649A (ja) | 1984-03-09 |