CN208939333U - A kind of laser luminous power adjusting circuit - Google Patents
A kind of laser luminous power adjusting circuit Download PDFInfo
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- CN208939333U CN208939333U CN201821929025.XU CN201821929025U CN208939333U CN 208939333 U CN208939333 U CN 208939333U CN 201821929025 U CN201821929025 U CN 201821929025U CN 208939333 U CN208939333 U CN 208939333U
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- laser
- operational amplifier
- power supply
- vlaser
- drain electrode
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Abstract
The utility model discloses a kind of laser luminous power adjusting circuit, including operational amplifier U1A, electric current adjusts pipe Q1, sampling resistor R4, diode D1 and laser power supply VLaser, the normal phase input end of operational amplifier U1A connects DAout signal, the grid of the output end connection Q1 of U1A, the drain electrode of Q1 is connected to laser power supply terminal interface 2, VLaser is connected to laser power supply terminal interface 1, D1 is connected between VLaser and the drain electrode of Q1, the drain electrode of the anode connection Q1 of D1, the cathode of D1 connects VLaser, the source electrode of Q1 is grounded by sampling resistor R4, Node connectedness between the source electrode and sampling resistor R4 of Q1 to operational amplifier negative-phase input.The utility model can adjust the luminous power of laser, guarantee the imaging effect of laser night-vision device.
Description
Technical field
The utility model relates to a kind of laser luminous powers to adjust circuit, belong to technical field of laser illumination.
Background technique
Video monitoring, evidence obtaining play a part of becoming more and more important in security system, and high-definition laser night-vision viewer has been widely used
In various industries such as public security, frontier defense, bank, oil fields.
Laser in high-definition laser night-vision viewer can be the video camera light filling under dark surrounds, but to anti-after all existing
Light is penetrated, deleterious effect is generated to video imaging effect, under conditions of visibility is certain, laser luminous power is bigger backward
The influence of reflection is just bigger, needs laser to export big luminous power to monitor the target of distant place, on the contrary, nearby for observation
The possible laser of target exports lesser luminous power, and video effect instead can be more preferable.In order to realize better imaging effect, need
The luminous power of laser is adjusted.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of laser luminous powers to adjust circuit, adjusts laser
Luminous power, guarantee the imaging effect of laser night-vision device.
In order to solve the technical problem, the technical solution adopted in the utility model is: a kind of laser luminous power tune
Economize on electricity road, including operational amplifier U1A, electric current adjustment pipe Q1, sampling resistor R4, diode D1 and laser power supply
The normal phase input end of VLaser, operational amplifier U1A connect DAout signal, and the output end of operational amplifier U1A connects power supply tune
The grid of homogeneous tube Q1, the drain electrode of power adjustment pipe Q1 are connected to laser power supply terminal interface 2, laser power supply VLaser
It is connected to laser power supply terminal interface 1, diode D1 is connected to laser power supply VLaser's and power adjustment pipe Q1
Between drain electrode, the drain electrode of the anode connection Q1 of D1, the cathode connecting laser power supply VLaser of D1, power adjustment pipe Q1's
Source electrode is grounded by sampling resistor R4, and the negative of Node connectedness to operational amplifier between the source electrode and sampling resistor R4 of Q1 is defeated
Enter end.
Further, electric capacity of voltage regulation is parallel between laser power supply VLaser and the drain electrode of power adjustment pipe Q1
C1、C2。
Further, the output end of operational amplifier U1A and reverse phase enter and leave and are parallel with capacitor C3, C4 between section.
Further, DAout signal is connected to the normal phase input end of operational amplifier U1A, operation amplifier by resistance R1
The output end of device U1A passes through the grid of resistance R2 connection power adjustment pipe Q1, the node between the source electrode and sampling resistor R4 of Q1
The negative-phase input of operational amplifier is connected to by resistance R3.
The utility model has the beneficial effects that the input current of the adjustable laser of the utility model, to change laser
The luminous power of device, to keep the imaging effect of the night vision device by laser aid imaging more preferable.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the functional block diagram of laser luminous power remote adjustment.
Specific embodiment
The utility model is further described in the following with reference to the drawings and specific embodiments.
Embodiment 1
As shown in Figure 1, a kind of laser luminous power adjusting circuit, including operational amplifier U1A, electric current adjustment pipe Q1,
The normal phase input end of sampling resistor R4, diode D1 and laser power supply VLaser, operational amplifier U1A connect DAout
Signal, the grid of the output end connection power adjustment pipe Q1 of operational amplifier U1A, the drain electrode of power adjustment pipe Q1 are connected to laser
Device power supply terminal interface 2, laser power supply VLaser are connected to laser power supply terminal interface 1, and diode D1 is connected to
Between laser power supply VLaser and the drain electrode of power adjustment pipe Q1, the drain electrode of the anode connection Q1 of D1, the cathode of D1 connects
Laser power supply VLaser is met, the source electrode of power adjustment pipe Q1 is grounded by sampling resistor R4, the source electrode and sampling electricity of Q1
Hinder the negative-phase input of the Node connectedness between R4 to operational amplifier.
In the present embodiment, electric capacity of voltage regulation is parallel between laser power supply VLaser and the drain electrode of power adjustment pipe Q1
C1,C2.The output end and reverse phase of operational amplifier U1A enters and leaves and is parallel with capacitor C3, C4 between section, and capacitor C3, C4 put operation
The stable output signal of big device U1A.
In the present embodiment, DAout signal is connected to the normal phase input end of operational amplifier U1A by resistance R1, and operation is put
The output end of big device U1A passes through the grid of resistance R2 connection power adjustment pipe Q1, the knot between the source electrode and sampling resistor R4 of Q1
Point is connected to the negative-phase input of operational amplifier by resistance R3.Resistance R1, R2, R3 play current-limiting protection.
In the present embodiment, DAout signal is the signal from D/A converter, by changing the size of DAout signal, fortune
The output signal of calculation method device U1A also changes, and the output of Q1 also changes, and is applied to the voltage of laser power supply terminal
Also it changes.Since supply voltage changes, the luminous power of laser also changes, to realize to laser
The adjusting of luminous power.The electric current of electric current adjustment pipe Q1 source electrode is adjusted in sampling resistor R4 simultaneously, and feeds back to operation and put
The negative-phase input of big device.
As shown in Fig. 2, being the functional block diagram of laser luminous power remote adjustment, control command is sent by network remote
To video camera, control command is parsed into RS485 signal and issues level shifting circuit by video camera, and level shifting circuit is by RS485
Signal is sent to control panel MCU after being converted into TTL signal, and control panel MCU is sent to D/A converter, D/ after being parsed into I2C signal
A converter generates DAout signal after carrying out digital-to-analogue conversion, and DAout signal is then sent to laser luminous power and adjusts electricity
Road, laser luminous power adjust circuit according to the luminous power of DAout Signal Regulation laser.
Described above is only the basic principle and preferred embodiment of the utility model, and those skilled in the art are according to this reality
With the novel improvement and replacement made, belong to the protection scope of the utility model.
Claims (4)
1. a kind of laser luminous power adjusts circuit, it is characterised in that: including operational amplifier U1A, electric current adjustment pipe Q1, adopt
The normal phase input end of sample resistance R4, diode D1 and laser power supply VLaser, operational amplifier U1A connect DAout letter
Number, the grid of the output end connection power adjustment pipe Q1 of operational amplifier U1A, the drain electrode of power adjustment pipe Q1 is connected to laser
Power supply terminal interface 2, laser power supply VLaser are connected to laser power supply terminal interface 1, and diode D1 is connected to sharp
Between light device power supply VLaser and the drain electrode of power adjustment pipe Q1, the drain electrode of the anode connection Q1 of D1, the cathode connection of D1
The source electrode of laser power supply VLaser, power adjustment pipe Q1 are grounded by sampling resistor R4, the source electrode and sampling resistor of Q1
Node connectedness between R4 to operational amplifier negative-phase input.
2. laser luminous power according to claim 1 adjusts circuit, it is characterised in that: laser power supply
Electric capacity of voltage regulation C1, C2 are parallel between VLaser and the drain electrode of power adjustment pipe Q1.
3. laser luminous power according to claim 1 adjusts circuit, it is characterised in that: operational amplifier U1A's is defeated
Outlet and reverse phase enter and leave and are parallel with capacitor C3, C4 between section.
4. laser luminous power according to claim 1 adjusts circuit, it is characterised in that: DAout signal passes through resistance
R1 is connected to the normal phase input end of operational amplifier U1A, and the output end of operational amplifier U1A is adjusted by resistance R2 connection power supply
The grid of pipe Q1, the node between the source electrode and sampling resistor R4 of Q1 are inputted by the negative that resistance R3 is connected to operational amplifier
End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821929025.XU CN208939333U (en) | 2018-11-22 | 2018-11-22 | A kind of laser luminous power adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821929025.XU CN208939333U (en) | 2018-11-22 | 2018-11-22 | A kind of laser luminous power adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208939333U true CN208939333U (en) | 2019-06-04 |
Family
ID=66727728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821929025.XU Active CN208939333U (en) | 2018-11-22 | 2018-11-22 | A kind of laser luminous power adjusting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208939333U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730178A (en) * | 2020-12-22 | 2021-04-30 | 杭州春来科技有限公司 | Vehicle-mounted transmission-type smoke meter and vehicle |
-
2018
- 2018-11-22 CN CN201821929025.XU patent/CN208939333U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730178A (en) * | 2020-12-22 | 2021-04-30 | 杭州春来科技有限公司 | Vehicle-mounted transmission-type smoke meter and vehicle |
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