JPS6446233A - Recording and reproducing device for optical information - Google Patents
Recording and reproducing device for optical informationInfo
- Publication number
- JPS6446233A JPS6446233A JP20183687A JP20183687A JPS6446233A JP S6446233 A JPS6446233 A JP S6446233A JP 20183687 A JP20183687 A JP 20183687A JP 20183687 A JP20183687 A JP 20183687A JP S6446233 A JPS6446233 A JP S6446233A
- Authority
- JP
- Japan
- Prior art keywords
- servo
- focusing
- tracking
- loop
- lead
- 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.)
- Granted
Links
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
PURPOSE:To stably lead in a focusing and/or a tracking servo by changing the aimed value of a second servo loop and detecting the lead-in position of a first servo loop. CONSTITUTION:The tracking servo or the focusing servo is obtained as the first servo loop. When the focusing servo or the tracking servo is led in, the second servo loop to obtain a focusing signal or a tracking signal, whose system is different from that of the signal of the focusing servo or the tracking servo usually executed, is possessed. A position detecting part 301 of the objective lens and light sources 304, 305, etc., of a LED, etc., are provided. When an oscillation is applied from the outside, the oscillation of an objective lens 110 can be minimized by the second servo loop including a position detecting part 301. Thus, the stable servo lead-in can be executed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62201836A JPH069085B2 (en) | 1987-08-14 | 1987-08-14 | Optical information recording / reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62201836A JPH069085B2 (en) | 1987-08-14 | 1987-08-14 | Optical information recording / reproducing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6446233A true JPS6446233A (en) | 1989-02-20 |
JPH069085B2 JPH069085B2 (en) | 1994-02-02 |
Family
ID=16447700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62201836A Expired - Fee Related JPH069085B2 (en) | 1987-08-14 | 1987-08-14 | Optical information recording / reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH069085B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01227229A (en) * | 1988-03-07 | 1989-09-11 | Matsushita Electric Ind Co Ltd | Information recording and reproducing device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60186515U (en) * | 1984-05-23 | 1985-12-10 | アイワ株式会社 | optical pickup device |
JPS6134734A (en) * | 1984-07-25 | 1986-02-19 | Sony Corp | Optical disc player |
-
1987
- 1987-08-14 JP JP62201836A patent/JPH069085B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60186515U (en) * | 1984-05-23 | 1985-12-10 | アイワ株式会社 | optical pickup device |
JPS6134734A (en) * | 1984-07-25 | 1986-02-19 | Sony Corp | Optical disc player |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01227229A (en) * | 1988-03-07 | 1989-09-11 | Matsushita Electric Ind Co Ltd | Information recording and reproducing device |
Also Published As
Publication number | Publication date |
---|---|
JPH069085B2 (en) | 1994-02-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |