JPS6413233A - Recording medium driving system - Google Patents
Recording medium driving systemInfo
- Publication number
- JPS6413233A JPS6413233A JP16705087A JP16705087A JPS6413233A JP S6413233 A JPS6413233 A JP S6413233A JP 16705087 A JP16705087 A JP 16705087A JP 16705087 A JP16705087 A JP 16705087A JP S6413233 A JPS6413233 A JP S6413233A
- Authority
- JP
- Japan
- Prior art keywords
- sample
- signal
- tracking
- flag
- light
- 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.)
- Pending
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To perform highly reliable and highly precise tracking, by forming a tracking error signal by detecting respectively differences of light beam quantities from each of a pair of tracking flag sample areas and the light quantity from a mirror area. CONSTITUTION:In an objective disk, tracking flags A, B and a synchronizing flag S are provided in the prescribed sample servo area of a track T, and light spot H runs in the mirror area in the flag B side. A reflected light by the spot H is detected by a quartered light detector 1. In a sample-hold circuit 14, after being qualified by a mirror sample signal, the signal is sample-held as considering the signal based on a reflection factor in the mirror area to be a reference signal. The output of the circuit 14 is used as the standard level of an RF signal in the flag A, B areas, sample-held by the sample-hold circuits 6, 7, and the fluctuation of a track servo gain can be suppressed and the highly reliable and highly precise tracking can be realized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16705087A JPS6413233A (en) | 1987-07-06 | 1987-07-06 | Recording medium driving system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16705087A JPS6413233A (en) | 1987-07-06 | 1987-07-06 | Recording medium driving system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6413233A true JPS6413233A (en) | 1989-01-18 |
Family
ID=15842467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16705087A Pending JPS6413233A (en) | 1987-07-06 | 1987-07-06 | Recording medium driving system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6413233A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5222057A (en) * | 1989-12-15 | 1993-06-22 | Ricoh Company, Ltd. | Tracking servo method used in an optical disk drive unit |
US5272686A (en) * | 1988-11-14 | 1993-12-21 | Ricoh Company, Ltd. | Servo signal generator for optical disk driving apparatus |
-
1987
- 1987-07-06 JP JP16705087A patent/JPS6413233A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5272686A (en) * | 1988-11-14 | 1993-12-21 | Ricoh Company, Ltd. | Servo signal generator for optical disk driving apparatus |
US5222057A (en) * | 1989-12-15 | 1993-06-22 | Ricoh Company, Ltd. | Tracking servo method used in an optical disk drive unit |
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