JPS5744239A - Information reproducer - Google Patents
Information reproducerInfo
- Publication number
- JPS5744239A JPS5744239A JP56108303A JP10830381A JPS5744239A JP S5744239 A JPS5744239 A JP S5744239A JP 56108303 A JP56108303 A JP 56108303A JP 10830381 A JP10830381 A JP 10830381A JP S5744239 A JPS5744239 A JP S5744239A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- sent
- tracking
- signals
- sampling pulse
- 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
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
- G11B7/0938—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 servo format, e.g. guide tracks, pilot signals
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
PURPOSE:To realize a simple and inexpensive information reproducer, by detecting the two tracking signals produced from the TV signal with the sampling pulse and controlling a light spot via the difference signal of the two tracking signals. CONSTITUTION:The tracking signals are recorded in the regions slightly shifted right and left from the center of a track an in the form of two frequency signals. The signal detected by a signal detector 45 is converted into a TV signal through an amplifier 46 and a demodulator 47. The sampling pulse given from a sampling pulse generating circuit 31 is sent to a gate 32 by the pulse signal given from a synchronous separating circuit 30, and the tracking signal is sampled to be sent to band pass filters 33 and 34. The output signals of the filters 33 and 34 are supplied to an arithmetic circuit 39 through envelope curve wave detecting circuits 35 and 36 plus low band pass filters 37 and 38 respectively. The difference output signal is sent to a driving device 41 via an amplifier 40 to control a light spot. In such way, a simple and inexpensive reproducer is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56108303A JPS5744239A (en) | 1981-07-13 | 1981-07-13 | Information reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56108303A JPS5744239A (en) | 1981-07-13 | 1981-07-13 | Information reproducer |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP48101204A Division JPS5912070B2 (en) | 1973-09-10 | 1973-09-10 | Information recording and playback method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5744239A true JPS5744239A (en) | 1982-03-12 |
JPS6362809B2 JPS6362809B2 (en) | 1988-12-05 |
Family
ID=14481269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56108303A Granted JPS5744239A (en) | 1981-07-13 | 1981-07-13 | Information reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5744239A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60261038A (en) * | 1984-06-07 | 1985-12-24 | Victor Co Of Japan Ltd | Recording and reproducing system of information recording medium disc possible for repetitive recording |
JPH0215427A (en) * | 1988-07-04 | 1990-01-19 | Ricoh Co Ltd | Tracking error detecting method |
-
1981
- 1981-07-13 JP JP56108303A patent/JPS5744239A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60261038A (en) * | 1984-06-07 | 1985-12-24 | Victor Co Of Japan Ltd | Recording and reproducing system of information recording medium disc possible for repetitive recording |
JPH0215427A (en) * | 1988-07-04 | 1990-01-19 | Ricoh Co Ltd | Tracking error detecting method |
Also Published As
Publication number | Publication date |
---|---|
JPS6362809B2 (en) | 1988-12-05 |
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