JPS6145727U - Control circuit for modulated laser light - Google Patents
Control circuit for modulated laser lightInfo
- Publication number
- JPS6145727U JPS6145727U JP12756584U JP12756584U JPS6145727U JP S6145727 U JPS6145727 U JP S6145727U JP 12756584 U JP12756584 U JP 12756584U JP 12756584 U JP12756584 U JP 12756584U JP S6145727 U JPS6145727 U JP S6145727U
- Authority
- JP
- Japan
- Prior art keywords
- laser light
- output
- control circuit
- modulated laser
- counter
- 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
- Measuring Volume Flow (AREA)
- Optical Head (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第1図はこの考案の概要を示すブロック図、第2図は第
1図の動作を説明するための波形図、第3図はこの考案
の一実施例を示す回路図である。
図中、1は可変電流源、2は変調器、3は半導体レーザ
光源、3pは検出器、4は比較器、5はカウンタ、6は
D/A変換器、7は[)−FF、8はリセット回路、9
は記録のための光学系、10はモード切り換えのスイッ
チを示す。FIG. 1 is a block diagram showing an overview of this invention, FIG. 2 is a waveform diagram for explaining the operation of FIG. 1, and FIG. 3 is a circuit diagram showing one embodiment of this invention. In the figure, 1 is a variable current source, 2 is a modulator, 3 is a semiconductor laser light source, 3p is a detector, 4 is a comparator, 5 is a counter, 6 is a D/A converter, 7 is [)-FF, 8 is a reset circuit, 9
10 indicates an optical system for recording, and 10 indicates a mode changeover switch.
Claims (2)
光源の発光パワーを検出する検出器と、この検出器の出
力と設定電圧を比較する比較器と、前記デジタルデータ
を計数するカウントーと、このカウンタの出力によって
前記半導体レーザ光源に洪給すを電力を制御する可変電
流源を設け、前記検出器の出力が設定電圧と等しくなっ
たとき出力される前記比較の出力をラッチして前記カウ
ンタの計数動作を停止し、所定の発光パワーを設定する
ように構成したことを特・徴とする変調レーザ光のII
I御回路。(1) A detector that detects the emission power of the semiconductor laser light source modulated by digital data, a comparator that compares the output of this detector with a set voltage, a counter that counts the digital data, and the output of this counter. A variable current source is provided to control the power supplied to the semiconductor laser light source, and the comparison output, which is output when the output of the detector becomes equal to the set voltage, is latched to control the counting operation of the counter. II of a modulated laser beam characterized by being configured to stop and set a predetermined emission power
I control circuit.
タに切り換わることを特徴と子る実用新案登録請求の範
囲第(1)項記載の変調レーザ光の制御回路。(2) A modulated laser light control circuit according to claim (1), characterized in that the digital data is switched to recording data after the set pulse.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12756584U JPS6145727U (en) | 1984-08-24 | 1984-08-24 | Control circuit for modulated laser light |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12756584U JPS6145727U (en) | 1984-08-24 | 1984-08-24 | Control circuit for modulated laser light |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6145727U true JPS6145727U (en) | 1986-03-26 |
JPH0548257Y2 JPH0548257Y2 (en) | 1993-12-22 |
Family
ID=30686207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12756584U Granted JPS6145727U (en) | 1984-08-24 | 1984-08-24 | Control circuit for modulated laser light |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6145727U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02165424A (en) * | 1988-12-16 | 1990-06-26 | Sanyo Electric Co Ltd | Control method for laser power and control circuit thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58100245A (en) * | 1981-12-11 | 1983-06-14 | Nec Corp | Controller for quantity of light of optical recording and reproducing device |
JPS58100571A (en) * | 1981-12-10 | 1983-06-15 | Konishiroku Photo Ind Co Ltd | Laser beam scanning device |
-
1984
- 1984-08-24 JP JP12756584U patent/JPS6145727U/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58100571A (en) * | 1981-12-10 | 1983-06-15 | Konishiroku Photo Ind Co Ltd | Laser beam scanning device |
JPS58100245A (en) * | 1981-12-11 | 1983-06-14 | Nec Corp | Controller for quantity of light of optical recording and reproducing device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02165424A (en) * | 1988-12-16 | 1990-06-26 | Sanyo Electric Co Ltd | Control method for laser power and control circuit thereof |
Also Published As
Publication number | Publication date |
---|---|
JPH0548257Y2 (en) | 1993-12-22 |
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