JPS6466832A - Tracking controller in optical disk device - Google Patents
Tracking controller in optical disk deviceInfo
- Publication number
- JPS6466832A JPS6466832A JP22299287A JP22299287A JPS6466832A JP S6466832 A JPS6466832 A JP S6466832A JP 22299287 A JP22299287 A JP 22299287A JP 22299287 A JP22299287 A JP 22299287A JP S6466832 A JPS6466832 A JP S6466832A
- Authority
- JP
- Japan
- Prior art keywords
- wobbling
- tracking
- low frequency
- frequency component
- frequency
- 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
Abstract
PURPOSE:To eliminate the need for making a high beam wobble in a recording part, by making an outgoing beam wobble at an address part, and coupling a tracking for a sample by wobbling with a continuous tracking by a difference signal. CONSTITUTION:The beam wobbling is performed only in the address part, and as for a low frequency component containing offset detection information, the absolute incident light quantity of a tracking sensor is converted into electricity quantity, and the frequency component twice as high as a wobbling frequency is removed. When it is envelope-detected by a low pass filter 13 after multiplying it by the wobbling frequency, a signal proportional to track dislocation quantity is obtained. In a low frequency band, by the tracking by the wobbling, and in a high frequency band, by the tracking by the difference signal, a control band can be retained as it is, and the influence of the offset, i.e., a low frequency component can be removed, and further, the low frequency gain of a control system can be increased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62222992A JPH0638293B2 (en) | 1987-09-08 | 1987-09-08 | Tracking control device in optical disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62222992A JPH0638293B2 (en) | 1987-09-08 | 1987-09-08 | Tracking control device in optical disk device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6466832A true JPS6466832A (en) | 1989-03-13 |
JPH0638293B2 JPH0638293B2 (en) | 1994-05-18 |
Family
ID=16791108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62222992A Expired - Fee Related JPH0638293B2 (en) | 1987-09-08 | 1987-09-08 | Tracking control device in optical disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0638293B2 (en) |
-
1987
- 1987-09-08 JP JP62222992A patent/JPH0638293B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0638293B2 (en) | 1994-05-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3570545D1 (en) | Apparatus for recording and/or reading information in/from a track of a reflecting record carrier, which apparatus comprises a focusing control system with reduced spot-offset sensitivity | |
KR0121313Y1 (en) | Optical pick-up device | |
CA2013836A1 (en) | Optical recording and reproducing apparatus | |
MY104528A (en) | Optical disc servo apparatus. | |
JPS6466832A (en) | Tracking controller in optical disk device | |
JPS648563A (en) | Track counter | |
EP0295682A3 (en) | Wavelength selective optical recording and reproducing device | |
JPS54133305A (en) | Information recorder | |
JPS564004A (en) | System for detecting minute defects of body | |
JPS6491009A (en) | Apparatus for evaluating flatness of thin film | |
JPS575187A (en) | Recorder | |
JPS55131753A (en) | Temperature controller for use in element analysis | |
JPS56148745A (en) | Optical recorder and reproducer | |
JPS5555445A (en) | Optical recording information reproducing device | |
JPS5439103A (en) | Medium locator for fucus servo | |
JPS5647931A (en) | Optical recording and reproducing device | |
JPS53148412A (en) | Optical recorder or reproducer | |
JPS5455317A (en) | Control system for quantity of light of pickup unit | |
JPS53116110A (en) | Optical recorder-reproducer | |
JPS56163534A (en) | Optical information recording carrier | |
JPS57179953A (en) | Optical reproducing system | |
JPS52152705A (en) | Optical reproducing system | |
JPS53147509A (en) | Tacking apparatus | |
JPS5694523A (en) | Optical information recorder | |
JPS56163442A (en) | Method for detecting gas concentration |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |