CN106711756A - Laser module group and laser control instrument comprising same - Google Patents
Laser module group and laser control instrument comprising same Download PDFInfo
- Publication number
- CN106711756A CN106711756A CN201710077754.0A CN201710077754A CN106711756A CN 106711756 A CN106711756 A CN 106711756A CN 201710077754 A CN201710077754 A CN 201710077754A CN 106711756 A CN106711756 A CN 106711756A
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- pins
- laser
- laser module
- resistance
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
Abstract
The invention discloses a laser module group and a laser control instrument comprising the same. The laser module group comprises a focusing lens, a laser diode, a heat dissipation support with a through hole, and a cooling fan. The laser diode is fixed in the through hole, and the focusing lens and the cooling fan are respectively fixed at two sides of the through hole. The focusing lens is used for the focusing and collimation of emergent light rays of the laser diode. The heat dissipation support comprises one external surface which is provided with cooling fins in an array manner. The cooling fan is used for cooling the laser diode in a mode of air pumping. The cooling fan is disposed at the through hole and the external surface of the heat dissipation support is provided with the cooling fins in the array manner, thereby achieving the cooperation temperature control. The laser module group can achieve the quick pumping of hot air and the heat transfer of a sealed housing of the laser diode, effectively solves problems of spectrum red shift, spectrum line width extension and hole burning, and greatly improves the spectrum stability and testing precision.
Description
Technical field
The present invention relates to semiconductor laser field, more particularly to a kind of laser module and the laser controlling instrument comprising it.
Background technology
In scientific research institutions and the experiment test stage of colleges and universities, it is often necessary to control the light intensity and pulsewidth of semiconductor laser,
So as to photoelectric characteristic of the test sample under the conditions of different light intensity and pulsewidth.
Often there is spectral red shift, spectrum line in high power pump sample in existing laser module and laser controlling instrument
The phenomenon of wide or hole burning is spreaded, test spectral stability and precision reduction is ultimately resulted in.
The content of the invention
The technical problem to be solved in the present invention is to overcome the laser module spectral red shift and spectrum widening of prior art
Serious defect, there is provided a kind of laser module and the laser controlling instrument comprising it, the laser module have suppress spectral red shift and
The function that spectrum is spreaded.
The present invention is to solve above-mentioned technical problem by following technical proposals：
A kind of laser module, its feature is, the laser module include a collector lens, laser diode, one
Cooling stand and a radiator fan with through hole, the laser diode are fixed in the through hole, and the collector lens dissipates with this
Hot-air fan is individually fixed in the both sides of the through hole, and the collector lens is used for the emergent ray focussed collimated of the laser diode,
The cooling stand includes an array the outer surface of radiating fin, and the radiator fan is used for by the side of pumping air
Formula radiates for the laser diode.
It is preferred that the collector lens is connected with the through hole whorl, the radiator fan has a dismountable netted isolation
Cover, the radiator fan is additionally operable to suck air by the fin clearance of those radiating fins and discharged by the netted cage.
Thread connecting mode not only facilitates collector lens and is fixed with through hole, even more improves the focusing focusing degree of accuracy.Netted cage
External object or finger touching cooling fan rotor can be prevented.
A kind of laser controlling instrument, its feature is that the laser controlling instrument includes laser module as described above and a light
Electric controller, the photoelectric controller includes an arduino development boards and a TTL driving plates,
The TTL driving plates include that a rectification unit being sequentially connected electrically, a filter unit and a partial pressure self-bias pressure type are total to
Penetrate amplifying circuit；
The total radio amplifier is used to drive the laser diode；
The arduino development boards are used to control the laser diode to swash by way of controlling the total radio amplifier and providing bias
Penetrate or turn off.
The above-mentioned design of laser controlling instrument has the advantages that to manipulate that convenient, stabilized intensity, Ripple Noise be low and high gain.
It is preferred that the TTL driving plates also include a power adjustment unit for being used to control the total radio amplifier, the work(
Rate adjustment unit includes a NCP1523 chip and an adjustable potentiometer, and the adjustable potentiometer is used to adjust the NCP1523 cores
The voltage of the VIN pins of piece.The above-mentioned design of power adjustment unit can produce up to 600mA electric currents to export, 0.9V to 2.3V
Self adaptation adjustable voltage and 93% conversion efficiency.
It is preferred that the TTL driving plates also include the pressure unit of the power for controlling the radiator fan, the step-down
Unit includes 34063 chip, the 16th resistance, the 17th resistance, the 18th resistance, the 19th resistance, the second electric capacity, the
Three electric capacity, the 4th electric capacity, the first inductance and the 5th diode,
The IDC pins of 34063 chip, IPK pins and SWC pins are by the 19th resistance and the positive pole of the radiator fan
Electrical connection；
The positive pole of the 5th diode is electrically connected with the negative pole of the radiator fan, the negative pole of the 5th diode and 34063 core
The SWE pins electrical connection of piece；
The Vcc pins of 34063 chip are electrically connected with the positive pole of the filter unit, and the TCAP pins of 34063 chip are by being somebody's turn to do
3rd electric capacity is electrically connected with the negative pole of the filter unit, and first inductance connection is in the TCAP pins and the positive pole of the 4th electric capacity
Between, the negative pole of the 4th electric capacity and the GND pin of 34063 chip are electrically connected with the negative pole of the filter unit, and the tenth
Eight resistance are in parallel with the 4th electric capacity, and the 17th resistance is connected to the COMP pins and the 4th electric capacity of 34063 chip
Between positive pole, second electric capacity and the 17th resistor coupled in parallel, the 16th resistance are connected to the COMP pins and the filtering list
Between the positive pole of unit.Pressure unit has short circuit current limitation, low quiescent current, switching current high（Up to 1.5A）And adapt to
Wide frequency of oscillation（100Hz to 100KHz）Advantage, preferably can match with pulsed laser mode.
It is preferred that the photoelectric controller includes that one is used to fix the arduino development boards and the lower casing of the TTL driving plates
Body, a closure and multiple screw rods, the lower house are provided with multiple screw rod perforation, and blind hole is threaded on the closure, should
A little screw rods are used to that those tapped blind holes to be perforated and be fixed on through those screw rods.By using screw rod and perforation connected mode,
The characteristics of photoelectric controller has appearance neat appearance and dismantles easy to assembly.
It is preferred that the photoelectric controller also includes a front apron and a backboard, the lower house, the closure are provided with
Slot for fixing the front apron and the backboard.Photoelectric controller uses baffle plate and slot connected mode, not only more enters one
Step lifting simple and convenient assembly, even more reduces sealing box body（20cmX17.5cmX6cm）Convenient transport.
It is preferred that the photoelectric controller also includes that a two ends are respectively provided with the U of a clamping part, a rotating part and a grip part
The both sides of type handle, the lower house and the closure are provided with the groove of buckle half being mutually matched with the U-shaped handle, this U-shaped
Hand those rotating parts and those grooves of buckle half relative to when can be rotated relative to the lower house, the U-shaped handle is in those clamping parts
The lower house is fixed on when relative with those grooves of buckle half, the grip part is provided with a plurality of anti-skidding muscle.U-shaped handle is set using rotation
Meter mode, not only conveniently carries, and can also support photoelectric controller body, conveniently radiates and uses.
It is preferred that the photoelectric controller also includes a Temperature Humidity Sensor for DHT11 models, the lower house is provided with
Air grid, the Temperature Humidity Sensor is fixed on the air grid, Vcc pins and the GND pin difference of the Temperature Humidity Sensor
Electrically connected with the arduino development board Vcc pins and GND pin, Dout pins and the arduino of the Temperature Humidity Sensor are opened
Send out the data output pins electrical connection of plate.Temperature Humidity Sensor can directly be communicated by air grid with the external world, accurately be surveyed
Examination Laboratory Temperature humidity, humidity deviation 5%RH, 2 DEG C of temperature deviation, humidity range 20-90%RH, 0 ~ 50 DEG C of temperature range, and energy
Host computer is enough fed back to by arduino development boards.
On the basis of common sense in the field is met, above-mentioned each optimum condition can be combined, and obtain final product each preferable reality of the present invention
Example.
Positive effect of the invention is：By in through hole, radiator fan and the outer surface in cooling stand are set
Array radiating fin cooperates with temperature control, it is possible to achieve the quick pumping of hot-air and the heat transfer of laser diode package housing, has
Spectral red shift, spectral line width broadening and hole burning are solved the problems, such as to effect, spectrum stability and measuring accuracy is significantly increased.
Brief description of the drawings
Fig. 1 is the structural representation of the laser module of present pre-ferred embodiments.
Fig. 2 is the explosive view of the laser module of Fig. 1.
Fig. 3 is the structural representation of the laser controlling instrument of present pre-ferred embodiments.
Fig. 4 is the explosive view of the laser controlling instrument of Fig. 3.
Fig. 5 removes the structural representation of closure for the laser controlling instrument of Fig. 3.
Fig. 6 installs schematic diagram for the backboard of the laser controlling instrument of present pre-ferred embodiments.
Fig. 7 is the structural representation of the U-shaped handle of the laser controlling instrument of present pre-ferred embodiments.
Fig. 8 is the fundamental diagram of the U-shaped handle in rotation status of the laser controlling instrument of Fig. 5.
Fig. 9 is the fundamental diagram of the U-shaped handle in buckle status of the laser controlling instrument of Fig. 5.
Figure 10 is the circuit theory diagrams of the laser controlling instrument of present pre-ferred embodiments.
Figure 11 is the control optical branch Labview figures of the laser controlling instrument of Figure 10.
Figure 12 is the humiture display branch Labview figures of the laser controlling instrument of Figure 10.
Description of reference numerals：
Laser module：10 collector lenses：11
Laser diode：12 cooling stands：13
Radiator fan：14 photoelectric controllers：20
Arduino development boards：21 TTL driving plates：22
Lower house：23 closures：24
Screw rod：25 screw rods are perforated：26
Front apron：27 backboards：28
U-shaped handle：29 power supplys：30
USB data line：40 laser controlling instrument：100
Through hole：131 radiating fins：132
Netted cage：141 humidity sensors：201
The groove of buckle half：230 air grids：231
Slot：232 clamping parts：291
Rotating part：292 grip parts：293
Anti-skidding muscle：2931
Specific embodiment
Name preferred embodiment, and become apparent from intactly illustrating the present invention with reference to accompanying drawing.
The structure of the laser module of the present embodiment is as follows：
Understood incorporated by reference to Fig. 1-2, the laser module of the present embodiment includes 11, laser diode of a collector lens
12nd, a cooling stand 13 and a radiator fan 14 with through hole 131, the laser diode 12 is fixed on the through hole 131
Interior, the collector lens 11 and the radiator fan 14 are individually fixed in the both sides of the through hole 131, and the collector lens 11 is used to swash this
The emergent ray focussed collimated of optical diode 12, the cooling stand 13 includes an array the outer surface of radiating fin 132,
The radiator fan 14 is used for by way of pumping air as the laser diode 12 radiates.
The collector lens 11 is threadedly coupled with the through hole 131, and the radiator fan 14 has a dismountable netted isolation
Cover 141, the radiator fan 14 is additionally operable to suck air and by the netted isolation by the fin clearance of those radiating fins 132
Cover 141 is discharged.
The operation principle and technique effect of the laser module of the present embodiment are as follows：
The waste heat that laser diode package housing is produced is conducted to the radiating fin of cooling stand, radiating by way of heat transfer
Fan can be discharged by the hot-air pumping in through hole and radiating fin gap and by the netted cage, the two collaboration control
Temperature, efficiently solves the technical barrier of spectral red shift, spectral line width broadening and hole burning, be significantly increased spectrum stability and
Measuring accuracy.
The structure of the laser controlling instrument of the present embodiment is as follows：
Understood incorporated by reference to Fig. 3-5, the laser controlling instrument 100 of the present embodiment includes laser module as described above 10,
Photoelectric controller 20, a power supply 30 and a USB data line 40, the photoelectric controller 20 include an arduino development boards 21 and
TTL driving plates 22.
Understood incorporated by reference to Fig. 4-5, the photoelectric controller 20 includes that one is used to fix the He of arduino development boards 21
23, closure 24 of lower house of the TTL driving plates 22 and multiple screw rods 25, the lower house 23 are provided with multiple screw rod perforation
26, blind hole is threaded on the closure 24, those screw rods 25 are used for through those screw rods perforation 26 and are fixed on those spiral shells
Line blind hole.
The photoelectric controller also includes a front apron 27 and a backboard 28, and the lower house 23, the closure 24 are respectively provided with
There is the slot for fixing the front apron 27 and the backboard 28, backboard 28 is only gived in Fig. 6 and is inserted on the lower house 23
Slot 232 principle.
Understood incorporated by reference to Fig. 7, the photoelectric controller 20 is also respectively provided with a clamping part 291, a rotation including a two ends
The U-shaped handle 29 of the grip part 293 of transfer part 292 and, the grip part 293 is provided with a plurality of anti-skidding muscle 2931, gives incorporated by reference to Fig. 8
Understand, the both sides of the lower house 23 and the closure 24 are provided with the groove of buckle half being mutually matched with the U-shaped handle 29, below
Explained only by taking the groove 230 of buckle half of lower house 23 as an example.
The U-shaped handle 29 when the groove 230 of those rotating parts 292 and those buckles half is relative can the relative lower house 23 revolve
Turn, understood incorporated by reference to Fig. 9, the U-shaped handle 29 is fixed on when the groove 230 of those clamping parts 291 and those buckles half is relative
The lower house 23.
Understood incorporated by reference to Figure 10, the TTL driving plates 21 include the rectification unit, the filtering that are sequentially connected electrically
Unit and a partial pressure self-bias pressure type total radio amplifier, the total radio amplifier are used to drive the laser diode 12；Should
Arduino development boards be used for control the total radio amplifier provide bias by way of control the lasing of laser diode 12 or
Shut-off.
In order to distinguish above-mentioned each unit circuit structure, understood continuing with reference to Figure 10, the rectification unit includes first
Diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4；
The filter unit includes first resistor R1 and the first electric capacity C1；
The partial pressure self-bias pressure type total radio amplifier includes second resistance R2,3rd resistor R3, the first triode T1, the two or three pole
Pipe T2, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 11st resistance R11, the 12nd resistance R12,
3rd triode T3, the 14th resistance R14 and the 15th resistance R15.
The TTL driving plates 21 also include a power adjustment unit for being used to control the total radio amplifier, and the power is adjusted
Section unit includes a NCP1523 chip and an adjustable potentiometer R9, and adjustable potentiometer R9 is used to adjust the NCP1523 cores
The voltage of the VIN pins of piece.
When side circuit is produced, adjustable potentiometer R9 can be connected to the by the 8th resistance R8 with voltage divide function
Between four resistance R4 and the 5th resistance R5, understood incorporated by reference to Fig. 5, adjustable potentiometer R9 can be designed to external form
Knob 270, to facilitate rotation control laser intensity.The FB pins of NCP1523 chips are connected to the one or three by the tenth resistance R10
The emitter stage of pole pipe T1, the ADJ pins of NCP1523 chips are connected to the base stage of the 3rd triode T3 by the 13rd resistance R13,
The EN pins of NCP1523 chips are connected to the emitter stage of the first triode T1, and the VIN pins of NCP1523 chips are connected to the 4th
Between resistance R4 and the 5th resistance R5, the Vout pins of NCP1523 chips are electrically connected with adjustable potentiometer R9.
The TTL driving plates also include the pressure unit of the power for controlling the radiator fan 14, the pressure unit
Including 34063 chips, the 16th resistance R16, the 17th resistance R17, the 18th resistance R18, the 19th resistance R19,
Two electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the first inductance L1 and the 5th diode D5,
The IDC pins of 34063 chip, IPK pins and SWC pins pass through the 19th resistance R19 and the radiator fan 14
Positive pole electrical connection；
The positive pole of the 5th diode D5 is electrically connected with the negative pole of the radiator fan 14, the negative pole of the 5th diode D5 with should
The SWE pins electrical connection of 34063 chips；
The Vcc pins of 34063 chip are electrically connected with the positive pole of the filter unit, and the TCAP pins of 34063 chip are by being somebody's turn to do
3rd electric capacity C3 is electrically connected with the negative pole of the filter unit, and first inductance L1 is connected to the TCAP pins and the 4th electric capacity C4
Positive pole between, the negative pole of the 4th electric capacity C4 and the GND pin of 34063 chip are electrically connected with the negative pole of the filter unit
Connect, the 18th resistance R18 is in parallel with the 4th electric capacity C4, the COMP that the 17th resistance R17 is connected to 34063 chip draws
Between the positive pole of pin and the 4th electric capacity C4, the second electric capacity C2 is in parallel with the 17th resistance R17, the 16th resistance R16
It is connected between the COMP pins and the positive pole of the filter unit.
Understood incorporated by reference to Fig. 5, the photoelectric controller 20 also includes a Temperature Humidity Sensor for DHT11 models
201, the lower house 23 is provided with air grid 231, and the Temperature Humidity Sensor 201 is fixed on the inner surface of the air grid 231,
Understood incorporated by reference to Figure 10, the Vcc pins and GND pin of the Temperature Humidity Sensor 201 respectively with the arduino development boards 21
Vcc pins and GND pin electrical connection, the Dout pins of the Temperature Humidity Sensor 201 and the data of the arduino development boards 21
Output pin is electrically connected.It is to be appreciated that the power supply 30 in dc source DC exactly Fig. 3 in Figure 10, usually to turn 12V straight for 220V
Stream power supply, dc source DC switchs 281 and rectification unit preferably by ship type（D1~4）Electrical connection, gives incorporated by reference to Fig. 5
Understand, switching 281 i.e. controllable photoelectric controllers 20 using ship type is switched on and off, and without frequently plugging power supply 30.
Understood incorporated by reference to Figure 11 and Figure 12, in order to realize that the intelligentized control method laser controlling instrument 100 and the humidity are passed
Sensor 201, special envoy's control interface with Labview software programmings, control optical branch includes VISA initialization units, laser light on and off
Time setting unit, flash frequency and dutycycle display module；Humiture display branch includes VISA initialization units, temperature
Display unit and humidity display unit.
When using, user only need to install the Labview softwares in control terminal, you can realize visualization and integrated control
The purpose of light intensity and monitoring humiture.
Although the foregoing describing specific embodiment of the invention, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
On the premise of principle of the invention and essence, various changes or modifications can be made to these implementation methods, but these are changed
Protection scope of the present invention is each fallen within modification.
Claims (9)
1. a kind of laser module, it is characterised in that the laser module includes a collector lens, laser diode,
Individual cooling stand and a radiator fan with through hole, the laser diode are fixed in the through hole, the collector lens and should
Radiator fan is individually fixed in the both sides of the through hole, and the collector lens is used to for the emergent ray of the laser diode to focus on standard
Directly,
The cooling stand includes an array the outer surface of radiating fin, and the radiator fan is used for by the side of pumping air
Formula radiates for the laser diode.
2. laser module as claimed in claim 1, it is characterised in that the collector lens is connected with the through hole whorl, the radiating
Fan has a dismountable netted cage, and the radiator fan is additionally operable to be sucked by the fin clearance of those radiating fins
Air is simultaneously discharged by the netted cage.
3. a kind of laser controlling instrument, it is characterised in that the laser controlling instrument includes in claim 1-2 described in any one
Laser module and a photoelectric controller, the photoelectric controller include an arduino development boards and a TTL driving plates,
The TTL driving plates include that a rectification unit being sequentially connected electrically, a filter unit and a partial pressure self-bias pressure type are total to
Penetrate amplifying circuit；
The total radio amplifier is used to drive the laser diode；
The arduino development boards are used to control the laser diode to swash by way of controlling the total radio amplifier and providing bias
Penetrate or turn off.
4. laser module as claimed in claim 3, it is characterised in that the TTL driving plates also include that is used to control this to be total to
The power adjustment unit of amplifying circuit is penetrated, the power adjustment unit includes a NCP1523 chip and an adjustable potentiometer, should
Adjustable potentiometer is used for the voltage of the VIN pins for adjusting the NCP1523 chips.
5. laser module as claimed in claim 3, it is characterised in that the TTL driving plates also include that is used to control this to dissipate
The pressure unit of the power of Hot-air fan, the pressure unit includes 34063 chip, the 16th resistance, the 17th resistance, the tenth
Eight resistance, the 19th resistance, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first inductance and the 5th diode,
The IDC pins of 34063 chip, IPK pins and SWC pins are by the 19th resistance and the positive pole of the radiator fan
Electrical connection；
The positive pole of the 5th diode is electrically connected with the negative pole of the radiator fan, the negative pole of the 5th diode and 34063 core
The SWE pins electrical connection of piece；
The Vcc pins of 34063 chip are electrically connected with the positive pole of the filter unit, and the TCAP pins of 34063 chip are by being somebody's turn to do
3rd electric capacity is electrically connected with the negative pole of the filter unit, and first inductance connection is in the TCAP pins and the positive pole of the 4th electric capacity
Between, the negative pole of the 4th electric capacity and the GND pin of 34063 chip are electrically connected with the negative pole of the filter unit, and the tenth
Eight resistance are in parallel with the 4th electric capacity, and the 17th resistance is connected to the COMP pins and the 4th electric capacity of 34063 chip
Between positive pole, second electric capacity and the 17th resistor coupled in parallel, the 16th resistance are connected to the COMP pins and the filtering list
Between the positive pole of unit.
6. laser module as claimed in claim 3, it is characterised in that the photoelectric controller include one be used for it is fixed should
Arduino development boards are provided with multiple spiral shells with the lower house of the TTL driving plates, a closure and multiple screw rods, the lower house
Bar is perforated, and blind hole is threaded on the closure, and those screw rods are used to that those screw threads to be perforated and be fixed on through those screw rods
Blind hole.
7. laser module as claimed in claim 6, it is characterised in that the photoelectric controller keeps off after also including a front apron and
Plate, the lower house, the closure are provided with the slot for fixing the front apron and the backboard.
8. laser module as claimed in claim 7, it is characterised in that the photoelectric controller is also respectively provided with including a two ends
The both sides of the U-shaped handle of clamping part, a rotating part and a grip part, the lower house and the closure are provided with and this U-shaped
The groove of buckle half that hand is mutually matched,
The U-shaped handle those rotating parts and those grooves of buckle half relative to when can be rotated relative to the lower house, the U-shaped handle exists
Those clamping parts are fixed on the lower house when relative with those grooves of buckle half, and the grip part is provided with a plurality of anti-skidding muscle.
9. laser module as claimed in claim 6, it is characterised in that the photoelectric controller also includes a DHT11 model
Temperature Humidity Sensor, the lower house is provided with air grid, and the Temperature Humidity Sensor is fixed on the air grid, the humiture
The Vcc pins and GND pin of sensor are electrically connected with the arduino development board Vcc pins and GND pin respectively, the humiture
The Dout pins of sensor are electrically connected with the data output pins of the arduino development boards.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710077754.0A CN106711756A (en) | 2017-02-14 | 2017-02-14 | Laser module group and laser control instrument comprising same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710077754.0A CN106711756A (en) | 2017-02-14 | 2017-02-14 | Laser module group and laser control instrument comprising same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079335A (en) * | 2018-10-19 | 2018-12-25 | 深圳德宝牛科技有限公司 | One kind being based on bluetooth miniature laser engraving machine and its operating method |
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