JPS628664U - - Google Patents
Info
- Publication number
- JPS628664U JPS628664U JP9991085U JP9991085U JPS628664U JP S628664 U JPS628664 U JP S628664U JP 9991085 U JP9991085 U JP 9991085U JP 9991085 U JP9991085 U JP 9991085U JP S628664 U JPS628664 U JP S628664U
- Authority
- JP
- Japan
- Prior art keywords
- laser diode
- converter
- detection element
- current
- laser
- 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
- 238000001514 detection method Methods 0.000 claims 3
- 239000000758 substrate Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Laser Beam Printer (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
第１図は本考案装置の一実施例を示す回路図、
第２図は従来装置の一例を示す回路図である。図
において、１はＬＤ、２はＰＤ、３，３０はＬＡ
、４はオペアンプ、５，９，２５，９１，９２は
抵抗、６，６０は電流電圧変換器、７は増幅回路
、８，８０は比較増幅回路、１０はトランジスタ
である。
FIG. 1 is a circuit diagram showing an embodiment of the device of the present invention;
FIG. 2 is a circuit diagram showing an example of a conventional device. In the figure, 1 is LD, 2 is PD, 3 and 30 are LA
, 4 is an operational amplifier, 5, 9, 25, 91, 92 are resistors, 6, 60 are current-voltage converters, 7 is an amplifier circuit, 8, 80 is a comparison amplifier circuit, and 10 is a transistor.
Claims (1)
けて電流に変換する検出素子と、該検出素子から
の電流を電圧に変換する変換器と、該変換器の出
力電圧と基準電圧を比較し、前記レーザダイオー
ドに流れる電流を制御してレーザダイオードから
放出されるレーザパワーを所定値にする制御手段
とを備えたレーザダイオード出力制御装置であつ
て、 前記変換器の変換率を調整する調整手段を設け
、前記レーザダイオード、検出素子、変換器及び
調整手段を同一基板上または同一混成集積回路内
に設けたことを特徴としたレーザダイオード出力
制御装置。[Claims for Utility Model Registration] A detection element that receives laser light emitted from a laser diode and converts it into current, a converter that converts the current from the detection element into voltage, and the output voltage and reference of the converter. A laser diode output control device comprising a control means for comparing voltages and controlling a current flowing through the laser diode to set the laser power emitted from the laser diode to a predetermined value, the device comprising: 1. A laser diode output control device characterized in that an adjustment means for adjustment is provided, and the laser diode, the detection element, the converter, and the adjustment means are provided on the same substrate or in the same hybrid integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9991085U JPS628664U (en) | 1985-06-28 | 1985-06-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9991085U JPS628664U (en) | 1985-06-28 | 1985-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS628664U true JPS628664U (en) | 1987-01-19 |
Family
ID=30969230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9991085U Pending JPS628664U (en) | 1985-06-28 | 1985-06-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS628664U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119690A (en) * | 1982-01-11 | 1983-07-16 | Hitachi Ltd | Laser light source |
| JPS5994482A (en) * | 1982-11-19 | 1984-05-31 | Fujitsu Ltd | Semiconductor laser drive circuit |
-
1985
- 1985-06-28 JP JP9991085U patent/JPS628664U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119690A (en) * | 1982-01-11 | 1983-07-16 | Hitachi Ltd | Laser light source |
| JPS5994482A (en) * | 1982-11-19 | 1984-05-31 | Fujitsu Ltd | Semiconductor laser drive circuit |