JPS56110381A - Optical information recorder - Google Patents
Optical information recorderInfo
- Publication number
- JPS56110381A JPS56110381A JP1243580A JP1243580A JPS56110381A JP S56110381 A JPS56110381 A JP S56110381A JP 1243580 A JP1243580 A JP 1243580A JP 1243580 A JP1243580 A JP 1243580A JP S56110381 A JPS56110381 A JP S56110381A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- information signal
- output
- reference burst
- gain
- 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 enable to keep a contrast of the information signal constant regardless of the difference in the characteristics of the semiconductor laser, by controlling the gain of an information signal amplifier based on the size of the reference burst signal that is piled on the laser beam during the information signal blanking period.
CONSTITUTION: The light receiver 23 receives the laser beam prior to each scan on a photoreceptor and delivers the signal corresponding to the highest level in the blanking period of the information signal. The output of the receiver 23 is supplied to the gate circuit 42 to extract only the reference burst signal. Then the peak value of the reference burst signal is held by the peak holding circuit 43 and then compared with the output of the reference signal generator 44. This difference controls the DC power source 40, and then the injection current of the semiconductor laser 30 is controlled. On the other hand, the DC component is eliminated out of the reference burst signal to extract the signal proportional to the waveheight value. This signal is compared with the output of the reference signal generator 52 to control the gain of the information signal amplifier 53.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1243580A JPS56110381A (en) | 1980-02-06 | 1980-02-06 | Optical information recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1243580A JPS56110381A (en) | 1980-02-06 | 1980-02-06 | Optical information recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56110381A true JPS56110381A (en) | 1981-09-01 |
Family
ID=11805207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1243580A Pending JPS56110381A (en) | 1980-02-06 | 1980-02-06 | Optical information recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56110381A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58172059A (en) * | 1982-04-02 | 1983-10-08 | Nec Corp | Laser printer |
JPS58179053A (en) * | 1982-04-15 | 1983-10-20 | Yokogawa Hokushin Electric Corp | Optical recorder |
-
1980
- 1980-02-06 JP JP1243580A patent/JPS56110381A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58172059A (en) * | 1982-04-02 | 1983-10-08 | Nec Corp | Laser printer |
JPS58179053A (en) * | 1982-04-15 | 1983-10-20 | Yokogawa Hokushin Electric Corp | Optical recorder |
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