JPS55157133A - Information recording and reproducing device - Google Patents
Information recording and reproducing deviceInfo
- Publication number
- JPS55157133A JPS55157133A JP6144479A JP6144479A JPS55157133A JP S55157133 A JPS55157133 A JP S55157133A JP 6144479 A JP6144479 A JP 6144479A JP 6144479 A JP6144479 A JP 6144479A JP S55157133 A JPS55157133 A JP S55157133A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- inputted
- zigzag
- detector
- phase
- 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
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
PURPOSE: To trace stably tracks of high-density recording, by inverting the zigzag phase for every track to invert the code of the error signal dependent upon adjacent tracks.
CONSTITUTION: Semiconductor laser light 39 is condensed onto optical disc 9, and the reflection light is condensed to photodetector 43 by beam splitter 42 to convert information written in track 17 to electric signal 44. Signal 44 is inputted to demodulator 45 and envelope detector 50, and the demodulator output is inputted to horizontal syncthronizing signal and vertical signal distributers 46 and 47 and prewobbling (zigzag) phase information decoder 48. Meanwhile, the zigzag signal detected by detector 50 is inputted to phase detector 56 through BPF57 and amplifier 58, and the output becomes error signal 60 through LPF59. Consequently, this error signal can be used to trace stably tracks of high-density recording with a light spot.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6144479A JPS55157133A (en) | 1979-05-21 | 1979-05-21 | Information recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6144479A JPS55157133A (en) | 1979-05-21 | 1979-05-21 | Information recording and reproducing device |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29481886A Division JPS62157333A (en) | 1986-12-12 | 1986-12-12 | Information reproducing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55157133A true JPS55157133A (en) | 1980-12-06 |
JPS6223370B2 JPS6223370B2 (en) | 1987-05-22 |
Family
ID=13171234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6144479A Granted JPS55157133A (en) | 1979-05-21 | 1979-05-21 | Information recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55157133A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58218049A (en) * | 1982-06-14 | 1983-12-19 | Mansei Kogyo Kk | Method for detecting focus control signal of optical information reader |
JPS61260426A (en) * | 1985-05-10 | 1986-11-18 | アルカテル・トムソン・ジガデイスク | Information medium with prerecord pattern and reader therefor |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5239960A (en) * | 1975-09-23 | 1977-03-28 | Toyo Pulp Kk | Method for treating stency sewage |
JPS52153663A (en) * | 1976-06-17 | 1977-12-20 | Olympus Optical Co Ltd | Playback apparatus fo disc form recording media |
-
1979
- 1979-05-21 JP JP6144479A patent/JPS55157133A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5239960A (en) * | 1975-09-23 | 1977-03-28 | Toyo Pulp Kk | Method for treating stency sewage |
JPS52153663A (en) * | 1976-06-17 | 1977-12-20 | Olympus Optical Co Ltd | Playback apparatus fo disc form recording media |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58218049A (en) * | 1982-06-14 | 1983-12-19 | Mansei Kogyo Kk | Method for detecting focus control signal of optical information reader |
JPS63854B2 (en) * | 1982-06-14 | 1988-01-08 | Mansei Kogyo Kk | |
JPS61260426A (en) * | 1985-05-10 | 1986-11-18 | アルカテル・トムソン・ジガデイスク | Information medium with prerecord pattern and reader therefor |
Also Published As
Publication number | Publication date |
---|---|
JPS6223370B2 (en) | 1987-05-22 |
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