JPS55125543A - Optical recorder/reproducer - Google Patents
Optical recorder/reproducerInfo
- Publication number
- JPS55125543A JPS55125543A JP3269979A JP3269979A JPS55125543A JP S55125543 A JPS55125543 A JP S55125543A JP 3269979 A JP3269979 A JP 3269979A JP 3269979 A JP3269979 A JP 3269979A JP S55125543 A JPS55125543 A JP S55125543A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- signal
- intensity
- light source
- output
- 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
Abstract
PURPOSE: To record and reproduce a digital data which is almost free from an error by suppressing a timing axis error owing to the pattern effect, by controlling intensity of an output ray of the recording light source.
CONSTITUTION: The current value which is applied by a laser light source 1 is changed depending upon recording or reproduction, a intensity modulating light according to a recording signal is radiated, and it is projected to a disk 4 through a condensing lens 2 and a focusing lens 3. In this case, the recording signal is provided to a modified FM circuit 10 through FFs 6 and 7, also each signal corresponding to frequencies 1f, 1.5f and 2f is generated in accordance with combination of 3 bit inputs which are continued by a condition gate circuit 8 and monostable multivibrators 9aW9c, each frequency signal is extracted by synchronizing with a MFM signal, and it is output by adding 12 amplitude to the MFM signal in the regular ratio. Thus the intensity of an output ray is controlled depending upon a recording area or a non-recording area.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3269979A JPS55125543A (en) | 1979-03-20 | 1979-03-20 | Optical recorder/reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3269979A JPS55125543A (en) | 1979-03-20 | 1979-03-20 | Optical recorder/reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55125543A true JPS55125543A (en) | 1980-09-27 |
Family
ID=12366090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3269979A Pending JPS55125543A (en) | 1979-03-20 | 1979-03-20 | Optical recorder/reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125543A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57198546A (en) * | 1981-05-29 | 1982-12-06 | Fuji Xerox Co Ltd | Optical information recording and reproducing method |
JPS5936336A (en) * | 1982-08-21 | 1984-02-28 | Victor Co Of Japan Ltd | Intensity control circuit of signal recording laser light |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50147225A (en) * | 1974-05-15 | 1975-11-26 |
-
1979
- 1979-03-20 JP JP3269979A patent/JPS55125543A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50147225A (en) * | 1974-05-15 | 1975-11-26 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57198546A (en) * | 1981-05-29 | 1982-12-06 | Fuji Xerox Co Ltd | Optical information recording and reproducing method |
JPS5936336A (en) * | 1982-08-21 | 1984-02-28 | Victor Co Of Japan Ltd | Intensity control circuit of signal recording laser light |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES458637A1 (en) | Optical scanning device | |
JPS647327A (en) | Method and apparatus for optical information recording | |
JPS51151150A (en) | Optical record reproducing reproducer in signal | |
JPS5280802A (en) | Optical type information recording and reproduction apparatus | |
JPS6437745A (en) | Magneto-optical disk device | |
SE7512535L (en) | SYSTEM FOR RECORDING AND / OR PLAYING A VIDEO SIGNAL | |
JPS55125543A (en) | Optical recorder/reproducer | |
JPS56145529A (en) | Signal recording and reproducing system | |
JPS55125546A (en) | Information recorder | |
JPS5348504A (en) | Optical recorder/reproducer | |
CA2048868A1 (en) | Magnetic recording medium and information recording-reproduction method using the same | |
JPS57203233A (en) | Optical recorder and reproducer | |
JPS5250702A (en) | Optical information recording and reproduction apparatus | |
JPS57150173A (en) | Reproducer for disc shape information recording medium | |
KR930020379A (en) | Film for use and film recording and playback equipment | |
JPS54137219A (en) | Record/reproduction system for information signal | |
JPS54116901A (en) | Signal reproducer | |
JPS54111315A (en) | Image recorder | |
JPS53100807A (en) | Optical recording and reproducing system | |
JPS5617586A (en) | Signal writing system for static picture of optical disk | |
JPS5562534A (en) | Information signal recording method for original disc of grooveless information recording medium disc | |
JPS54115114A (en) | Tracking control system in information signal recorder- reproducer | |
JPS5619528A (en) | Optical recording and reproducing unit | |
JPS5340510A (en) | Recording method of video signal | |
JPS5597664A (en) | Picture retrieving device |