JPH01127834U - - Google Patents
Info
- Publication number
- JPH01127834U JPH01127834U JP2428788U JP2428788U JPH01127834U JP H01127834 U JPH01127834 U JP H01127834U JP 2428788 U JP2428788 U JP 2428788U JP 2428788 U JP2428788 U JP 2428788U JP H01127834 U JPH01127834 U JP H01127834U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- laser
- optical output
- difference signal
- laser element
- 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 description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Laser Beam Printer (AREA)
- Fax Reproducing Arrangements (AREA)
Description
第１図は本考案のレーザー駆動装置の概念図で
ある。第２図は本考案のレーザー駆動装置の一実
施例を示す回路図である。
１……レーザー駆動装置、２……レーザーダイ
オード（レーザー素子）、３……光出力検出回路
、６……レーザー駆動回路。
FIG. 1 is a conceptual diagram of the laser driving device of the present invention. FIG. 2 is a circuit diagram showing an embodiment of the laser driving device of the present invention. 1... Laser drive device, 2... Laser diode (laser element), 3... Optical output detection circuit, 6... Laser drive circuit.
Claims (1)
ームを放出するレーザー素子ａと、レーザー素子
ａの光出力の大きさを検出する光出力検出回路ｂ
と、光出力検出回路ｂの検出結果を所定の基準値
と比較して差信号を出力する誤差増幅回路ｃと、
誤差増幅回路ｃからの差信号を所定値以下に制限
する制限回路ｄと、誤差増幅回路ｃからの差信号
に基づいてレーザー素子ａに供給する駆動電流を
制御するレーザー駆動回路ｅと、を備えたことを
特徴とするレーザー駆動装置。 A laser element a that emits a laser beam with an intensity corresponding to the supplied drive current, and an optical output detection circuit b that detects the magnitude of the optical output of the laser element a.
and an error amplifier circuit c that compares the detection result of the optical output detection circuit b with a predetermined reference value and outputs a difference signal.
A limiting circuit d that limits the difference signal from the error amplification circuit c to a predetermined value or less, and a laser drive circuit e that controls the drive current supplied to the laser element a based on the difference signal from the error amplification circuit c. A laser drive device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2428788U JPH01127834U (en) | 1988-02-24 | 1988-02-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2428788U JPH01127834U (en) | 1988-02-24 | 1988-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01127834U true JPH01127834U (en) | 1989-08-31 |
Family
ID=31244014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2428788U Pending JPH01127834U (en) | 1988-02-24 | 1988-02-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01127834U (en) |
-
1988
- 1988-02-24 JP JP2428788U patent/JPH01127834U/ja active Pending
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