CN116454718B - Laser device - Google Patents
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- CN116454718B CN116454718B CN202310691636.4A CN202310691636A CN116454718B CN 116454718 B CN116454718 B CN 116454718B CN 202310691636 A CN202310691636 A CN 202310691636A CN 116454718 B CN116454718 B CN 116454718B
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 36
- 230000008859 change Effects 0.000 claims abstract description 16
- 230000017525 heat dissipation Effects 0.000 claims description 18
- 230000001360 synchronised effect Effects 0.000 claims description 13
- 239000010409 thin film Substances 0.000 claims description 10
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 abstract description 10
- 239000000758 substrate Substances 0.000 abstract description 6
- 238000005452 bending Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0404—Air- or gas cooling, e.g. by dry nitrogen
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention provides a laser, which comprises a collimation light source module, a reflecting mirror and an aspheric convex lens, wherein the collimation light source module is focused by the aspheric convex lens after entering the reflecting mirror at an incidence angle of 45 degrees, the reflecting mirror is fixed on a film layer, the film layer is fixed at an opening formed by a substrate with three surrounding surfaces, a piezoelectric diaphragm is fixed on the substrate opposite to the film layer, the piezoelectric diaphragm is connected with a voltage regulating unit through a resistor element, a voltage stabilizing element is connected between the piezoelectric diaphragm and the resistor element and grounded through a normally closed first switch, the voltage stabilizing element maintains the voltage of the piezoelectric diaphragm to be constant when the voltage regulating unit outputs an increment voltage to the piezoelectric diaphragm, two ends of the resistor element are connected with an operation unit, the operation unit calculates the amplitude of the increment voltage through the current change of the resistor element, and the voltage stabilizing element is grounded through a normally open second switch and a variable resistance element which are connected in series.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to a laser with power of 10W.
Background
The laser refers to a device capable of emitting laser light, and the basic working principles of various lasers are the same except for a free electron laser. The essential conditions for lasing are that the population inversion and gain are greater than loss, so the essential components in the device have an excitation source and two parts of the working medium with metastable energy levels. The excitation is that the working medium absorbs external energy and then is excited to an excited state, so that conditions are created for realizing and maintaining the inversion of the particle number. Regarding the principle of laser beam shaping, reference is made to the patent document of my previously filed application No. 2021233396594, in particular to fig. 1 of the drawings accompanying the specification. The collimated light beam emitted by the collimated light source module is beaten on the base with the reflecting film, and then the combined light beam is focused into a spot light spot through the aspheric convex lens.
With the development of laser engraving technology, a laser capable of automatic focusing has been developed, such as using a mirror configuration disclosed in patent document 2015104456450 instead of a mirror in a conventional beam combiner. Instead of a planar mirror, a mirror with a changeable curvature of the reflecting surface, a change in focal length is achieved by a change in curvature of the reflecting surface. The principle is that the piezoelectric diaphragm is bent and deformed by applying voltage to the piezoelectric diaphragm, and finally the piezoelectric diaphragm is bent and deformed by being conducted by components such as a substrate and the like and finally carrying the reflecting mirror. The magnitude of the control voltage corresponds to the bending rate of the control reflector, so that focusing is realized.
However, such a control method has a problem that the mirror is further bent and deformed every time the piezoelectric diaphragm is given a certain incremental voltage, but after the mirror is bent and deformed, the piezoelectric diaphragm is given a certain incremental voltage every time later, and the bending deformation rate is fed back to the mirror to be larger, so that there are problems of poor focusing accuracy, great focusing difficulty and the like. Even if a resistor is connected in series on the piezoelectric diaphragm to divide a certain voltage, the voltage divided into the piezoelectric diaphragm is not changed basically and is linearly increased, and the problems of poor focusing accuracy, high focusing difficulty and the like caused by inconsistent control of focuses before and after a focusing process exist.
Disclosure of Invention
The invention aims to solve the technical problem of improving focusing accuracy and provides a laser.
According to the technical scheme, the laser comprises a collimation light source module, a reflecting mirror and an aspheric convex lens, wherein the collimation light source module is focused through the aspheric convex lens after entering the reflecting mirror at an incidence angle of 45 degrees, the reflecting mirror is fixed on a thin film layer, the thin film layer is fixed at an opening formed by a substrate with three surrounding layers, a piezoelectric diaphragm is fixed on the substrate opposite to the thin film layer, the piezoelectric diaphragm is connected with a voltage regulating unit through a resistance element, a voltage stabilizing element is connected between the piezoelectric diaphragm and the resistance element, the voltage stabilizing element is grounded through a normally closed first switch, the voltage stabilizing element maintains the voltage of the piezoelectric diaphragm to be constant when the voltage regulating unit outputs an increment voltage to the piezoelectric diaphragm, two ends of the resistance element are connected with an operation unit, the operation unit calculates the amplitude of the increment voltage through current change of the resistance element, the voltage stabilizing element is grounded through a normally open second switch and a variable resistance element which are connected in series, when the operation unit detects the increment voltage, the first switch and the second switch synchronously take the action to enable the voltage to be synchronous with the voltage to be synchronous, the voltage is synchronously increased to the voltage stabilizing element, and the voltage is synchronously increased to the output to the same with the output value of the voltage stabilizing element when the voltage is synchronously increased to the output the voltage.
As an embodiment, the adjustment travel of the varistor element is increased or decreased manually.
As an embodiment, the adjustment travel of the varistor element is increased or decreased by the drive of the electric actuator.
As one embodiment, the operation unit is connected with a magnetic attraction element, the magnetic attraction element is controllably connected with an adjusting element, and when the operation unit detects that there is an incremental voltage, the magnetic attraction element controls the adjusting element to act so that the first switch and the second switch complete synchronous actions.
As one embodiment, the device comprises a shell, wherein a rotating groove is formed in the shell, the first switch and the second switch are respectively arranged on two sides of the rotating groove, the regulating element is arranged in the rotating groove, and the magnetic element is further arranged on one side of the rotating groove;
when the magnetic element is triggered, the position of the adjusting element is changed in the rotating groove, so that the switch states of the first switch and the second switch are changed simultaneously, and the rotating stroke of the adjusting element is the adjusting stroke of the variable resistance element.
As an implementation mode, a first accommodating groove is formed in one surface of the rotating groove, and the first accommodating groove is used for accommodating the first switch.
As an implementation mode, a second accommodating groove is formed in one surface of the rotating groove, and the second accommodating groove is used for accommodating the second switch.
As one implementation mode, the end part of the shell is provided with a heat dissipation cavity, four sides of the heat dissipation cavity are provided with openings, and a heat dissipation element is arranged in the heat dissipation cavity.
As an embodiment, the end of the housing is further provided with a power plug.
As one implementation mode, the device also comprises a nozzle and a measured surface detachably connected below the nozzle, wherein the measured surface corresponds to a focusing plane, the collimated light beam emitted by the collimated light source module is a semicircular laser beam, and the collimated light beam is finally imaged on the measured surface; the imaging sensor is used for detecting the shape of a light spot on the measured surface, calculating the defocusing distance according to the shape and the size of the light spot, the variable resistance element comprises a first variable resistance unit and a second variable resistance unit, the resistance value of the first variable resistance unit increases in a logarithmic growth curve along with the increase of the adjustment stroke, the due resistance compensation quantity of the real-time tracking adjustment stroke is generated according to the variable of the defocusing distance and the increment of the adjustment stroke during the first focusing, the corresponding relation between the due resistance compensation quantity and the adjustment stroke is used as the resistance value output characteristic of the second variable resistance unit to output the corresponding compensation resistance value during the refocusing, and the first variable resistance unit and the second variable resistance unit are connected in series and are respectively connected with the voltage output unit.
Compared with the prior art, the voltage regulating device has the beneficial effects that the voltage applied by the voltage regulating unit is not directly supplied to the piezoelectric membrane, but the voltage of the piezoelectric membrane is kept stable through the voltage stabilizing element. Then the operation unit detects and calculates the increment voltage, and the first switch and the second switch are controlled to synchronously operate to cut the voltage stabilizing element to a current path where the variable resistance element is located when the increment voltage is detected, and the effective voltage of the variable resistance element for converting the synchronous voltage is zero when the voltage stabilizing element is cut. Then, the effective voltage of the variable resistance element for converting the synchronous voltage is gradually increased through adjustment, the resistance value of the variable resistance element is increased in a logarithmic growth curve along with the increase of the adjustment stroke, and the effective voltage is also increased in the logarithmic growth curve, and the increment is smaller when the effective voltage is increased to the rear. And then, the voltage stabilizing element is correspondingly arranged, and the potential of the negative electrode of the voltage stabilizing element is raised along with the gradual increase of the effective voltage, so that the positive electrode of the piezoelectric diaphragm has nonlinear voltage increase, and a brand new control mode replaces the traditional control mode, thereby realizing the improvement of focusing accuracy and the reduction of focusing difficulty.
Drawings
Fig. 1 is a first optical path diagram of a laser according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a mirror provided by an embodiment of the present invention;
FIG. 3 is a first schematic diagram of a laser according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a laser according to an embodiment of the present invention;
FIG. 5 is a second schematic diagram of a laser according to an embodiment of the present invention;
fig. 6 is a second optical path diagram of the laser according to the embodiment of the present invention.
In the figure: 1. a collimated light source module; 2. a reflecting mirror; 3. an aspherical convex lens; 4. a piezoelectric membrane; 5. a substrate; 6. a thin film layer; 7. a resistive element; 8. a voltage regulating unit; 9. a voltage stabilizing element; 10. a first switch; 11. an arithmetic unit; 12. a second switch; 13. a varistor element; 14. a voltage output unit; 15. a magnetic attraction element; 16. an adjusting element; 17. a housing; 18. a rotary groove; 19. a first accommodating groove; 20. a second accommodating groove; 21. a heat dissipation cavity; 22. an opening; 23. a heat dissipation element; 24. a power supply interface; 25. a nozzle; 26. a surface to be measured; 27. an imaging sensor; 28. a first varistor unit; 29. and a second varistor unit.
Detailed Description
The foregoing and other embodiments and advantages of the invention will be apparent from the following, more complete, description of the invention, taken in conjunction with the accompanying drawings. It will be apparent that the described embodiments are merely some, but not all, embodiments of the invention.
In one embodiment, as shown in fig. 1-3.
The laser provided by the embodiment comprises a collimation light source module 1, a reflecting mirror 2 and an aspheric convex lens 3, wherein the collimation light source module 1 is focused through the aspheric convex lens 3 after entering the reflecting mirror 2 at a 45-degree incident angle, the reflecting mirror 2 is fixed on a thin film layer 6, the thin film layer 6 is fixed at an opening formed by a base plate 5 with three surrounding surfaces, a piezoelectric diaphragm 4 is fixed on the base plate 5 opposite to the thin film layer 6, the piezoelectric diaphragm 4 is connected with a voltage regulating unit 8 through a resistor element 7, a voltage stabilizing element 9 is connected between the piezoelectric diaphragm 4 and the resistor element 7, the voltage stabilizing element 9 is grounded through a normally closed first switch 10, the voltage stabilizing element 9 maintains the voltage of the piezoelectric diaphragm 4 to be constant when the voltage regulating unit 8 outputs an increment voltage to the piezoelectric diaphragm 4, two ends of the resistor element 7 are connected with an operation unit 11, the operation unit 11 calculates the amplitude of the increment voltage through the current change of the resistor element 7, the voltage stabilizing element 9 is grounded through a normally open second switch 12 and a variable resistor element 13 connected in series, when the operation unit 11 detects that the increment voltage is detected, the first switch 10 and the second switch 12 synchronously acts to synchronously increase the voltage stabilizing element 9 to the output the increment voltage to the same value according to the increment value of the increment voltage of the operation unit, and the output value of the output element 13 is synchronously increased to the output the same, and the output value of the increment value is synchronously increases to the output value 13.
In this embodiment, the mirror 2 is further bent and deformed each time a certain incremental voltage is applied to the piezoelectric diaphragm 4, but after the mirror 2 is bent and deformed, each time a certain incremental voltage is applied to the piezoelectric diaphragm 4, the bending deformation rate is fed back to the mirror 2, and the focusing accuracy is poor and the focusing difficulty is high due to structural problems. In this regard, a laser with an improved control scheme is proposed, as described in the background art, in which even if a resistor is connected in series to the piezoelectric diaphragm 4 to split a certain voltage, the voltage split to the piezoelectric diaphragm 4 is essentially not changed and linearly increases, and the voltage is fed back to the bending deformation rate of the mirror 2, the change of which is close to an exponential increase curve, and the difficulty of focusing is greater for the latter part.
In the present embodiment, as shown in fig. 3, the voltage applied by the voltage adjusting unit 8 is not directly applied to the piezoelectric film 4, but the voltage of the piezoelectric film 4 is kept stable by the voltage stabilizing element 9. Then, the operation unit 11 detects and calculates the increment voltage, and when the increment voltage is detected, the first switch 10 and the second switch 12 are controlled to synchronously operate so as to cut the voltage stabilizing element 9 to a current path where the variable resistance element 13 is located, and when the voltage stabilizing element is cut, the effective voltage of the variable resistance element 13 for converting the synchronous voltage is zero. Then, by adjusting, the effective voltage for switching the synchronous voltage of the varistor element 13 is gradually increased, the resistance value of the varistor element 13 increases in a logarithmic curve with the increase of the adjustment stroke, and the effective voltage also increases in a logarithmic curve with the increase of the adjustment stroke, and the increment is smaller as the subsequent increment is. And then, the voltage stabilizing element 9 is correspondingly arranged, and along with the gradual increase of the effective voltage, the potential of the negative electrode of the voltage stabilizing element 9 is raised, so that the voltage of the positive electrode of the piezoelectric diaphragm 4 is increased in a nonlinear manner, and a brand new control mode replaces the traditional control mode, thereby realizing the improvement of focusing accuracy and the reduction of focusing difficulty.
In one embodiment, the adjustment travel of the varistor element 13 of the laser is manually increased or decreased.
In the present embodiment, the change in the resistance value of the varistor element 13 is caused by the change in the adjustment stroke, the resistance value of the varistor element 13 is changed, and the varistor element 13 is connected to the synchronous voltage to output the effective voltage in response to the change in the effective voltage output from the varistor element 13. The above adjustment process may be controlled manually.
In one embodiment, the adjustment travel of the variable resistance element 13 of the laser is increased or decreased by the actuation of the electric actuator.
In the present embodiment, the change in the resistance value of the varistor element 13 is caused by the change in the adjustment stroke, the resistance value of the varistor element 13 is changed, and the varistor element 13 is connected to the synchronous voltage to output the effective voltage in response to the change in the effective voltage output from the varistor element 13. The above adjustment process may be controlled electrically.
In one embodiment, as shown in fig. 3-4.
In the laser according to the present embodiment, the operation unit 11 is connected with the magnetic attraction element 15, the magnetic attraction element 15 is controllably connected with the adjustment element 16, and when the operation unit 11 detects that there is an incremental voltage, the magnetic attraction element 15 controls the adjustment element 16 to operate so that the first switch 10 and the second switch 12 complete the synchronous operation. The switch comprises a shell 17, wherein a rotary groove 18 is formed in the shell 17, a first switch 10 and a second switch 12 are respectively arranged on two sides of the rotary groove 18, an adjusting element 16 is arranged in the rotary groove 18, and a magnetic element 15 is further arranged on one side of the rotary groove 18; when the magnetic attraction element 15 is triggered, the position of the adjusting element 16 in the rotary groove 18 changes, so that the switching states of the first switch 10 and the second switch 12 are simultaneously changed, and the rotation stroke of the adjusting element 16 is the adjustment stroke of the variable resistance element 13.
In the present embodiment, when the arithmetic unit 11 detects that there is an incremental voltage, the magnetic element 15 controls the adjusting element 16 to operate, and correspondingly to fig. 4, the adjusting element 16 is made to perform an operation of moving from top to bottom, so that the adjusting element 16 that would otherwise abut against the first switch 10 to turn on is made to abut against the second switch 12 to turn on, and the first switch 10 is turned off. A specific schematic is shown in fig. 3. This allows the varistor element 13 to be connected to an electrical circuit. In addition, a rotation groove 18 is provided in the housing 17, and the adjustment of the varistor element 13 can be achieved by rotating the adjusting element 16 in the rotation groove 18. Of course, the rotation of the control element 16 may be controlled manually or electrically. The rotation stroke of the adjusting element 16 is the adjusting stroke of the variable resistance element 13.
In one embodiment, as shown in fig. 4.
In the laser provided in this embodiment, a first accommodating groove 19 is formed in one surface of the rotating groove 18, and the first accommodating groove 19 accommodates the first switch 10. One surface of the rotating groove 18 is provided with a second accommodating groove 20, and the second accommodating groove 20 is used for accommodating the second switch 12.
In the present embodiment, the first accommodation groove 19 is provided for accommodating and mounting the first switch 10, and specifically, a large part of the first switch 10 is embedded in the first accommodation groove 19, and only a small part is exposed. The same applies to the second accommodation groove 20 and the second switch 12.
In one embodiment, as shown in fig. 4.
In the laser according to the present embodiment, the end of the case 17 is provided with a heat dissipation chamber 21, four sides of the heat dissipation chamber 21 are provided with openings 22, and the heat dissipation chamber 21 is provided with a heat dissipation element 23. In addition, the end of the housing 17 is provided with a power plug-in port 24.
In the present embodiment, by providing the heat dissipation chamber 21 and installing the heat dissipation element 23 such as a fan or the like in the heat dissipation chamber 21, the heat dissipation performance of the laser can be improved, which is also a structure that is generally adopted by the laser at present.
In one embodiment, as shown in fig. 5-6.
The laser provided by the embodiment further comprises a nozzle 25 and a measured surface 26 detachably connected below the nozzle 25, wherein the measured surface 26 corresponds to a focusing plane, a collimated light beam emitted by the collimated light source module 1 is a semicircular laser beam, and the collimated light beam is finally imaged on the measured surface 26; the imaging sensor 27 is used for detecting the shape of a light spot on the measured surface 26, calculating the defocusing distance according to the shape and the size of the light spot, the variable resistance element 13 comprises a first variable resistance unit 28 and a second variable resistance unit 29, the resistance value of the first variable resistance unit 28 increases in a logarithmic growth curve along with the increase of the adjustment stroke, the due resistance compensation quantity for tracking the adjustment stroke in real time is generated according to the variable of the defocusing distance and the increment of the adjustment stroke in the first focusing, the corresponding relation between the due resistance compensation quantity and the adjustment stroke is used as the resistance value output characteristic of the second variable resistance unit 29 to output the corresponding compensation resistance value when focusing again, and the first variable resistance unit 28 and the second variable resistance unit 29 are connected in series and are respectively connected with the voltage output unit 14.
In this embodiment, in order to further improve focusing accuracy, focusing difficulty is reduced. The mirror 2, which has a large bending deformation ratio span with an increase in the supply voltage, can have a near constant bending deformation ratio, and the focal point is adjusted to a state in which the focal point moves in the same proportion with an increase in the supply voltage, even if the two have a linear quantization relationship. Before formal use, there is a first debugging, so-called first focusing. Because the measured surface 26 is arranged below the nozzle 25, the shape of a light spot can be shown, the collimated light beam is a semicircular laser beam, the shape of the light spot shown on the measured surface 26 is opposite when the positive defocus and the negative defocus are carried out, and the size of the light spot corresponds to the defocus distance, so that the focus position is obtained through calculation. With the adjustment of the varistor element 13, a change in the corresponding focal position can be detected. Then, when adjusting a certain amount, it is detected how much resistance compensation amount, either positive or negative, is needed in order to make the amount of change in the focal position constant. Then, a resistance compensation amount is generated, which is supposed to track the adjustment stroke in real time, and the corresponding relation between the resistance compensation amount and the adjustment stroke is used as the resistance value output characteristic of the second varistor unit 29 to output a corresponding compensation resistance value when focusing again. Therefore, the adjustment of linear quantization relation can be realized, the focusing accuracy is further improved, and the focusing difficulty is reduced.
The above-described embodiments are provided to further explain the objects, technical solutions, and advantageous effects of the present invention in detail. It should be understood that the foregoing is only illustrative of the present invention and is not intended to limit the scope of the present invention. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a laser, includes collimation light source module (1), speculum (2) and aspheric convex lens (3), collimation light source module (1) is with 45 degrees incidence angle incidence behind speculum (2) through aspheric convex lens (3) focus, speculum (2) are fixed in thin film layer (6), thin film layer (6) are fixed in the opening part that three-sided encircled base plate (5) formed, and piezoelectric diaphragm (4) are fixed in on base plate (5) opposite to thin film layer (6), and is characterized in that, piezoelectric diaphragm (4) are connected with voltage regulation unit (8) through resistance element (7), piezoelectric diaphragm (4) with be connected with voltage stabilizing element (9) between resistance element (7), voltage stabilizing element (9) are through normally closed first switch (10) ground, voltage stabilizing element (9) keep when voltage regulation unit (8) output increment voltage to piezoelectric diaphragm (4) on the opening part that forms, resistance element (7) are connected with voltage stabilizing element (11), voltage stabilizing element (11) are connected with voltage stabilizing element (11) and the both ends through voltage stabilizing element (13) change through the series connection, voltage stabilizing element (13) change through the voltage stabilizing element (13), when the operation unit (11) detects that the increment voltage exists, the first switch (10) and the second switch (12) synchronously act to cut the voltage stabilizing element (9) to a current path where the variable resistance element (13) is located, the variable resistance element (13) is further connected with a voltage output unit (14), the voltage output unit (14) outputs synchronous voltage with the same amplitude according to the amplitude of the increment voltage calculated by the operation unit (11), the resistance value of the variable resistance element (13) increases in a logarithmic growth curve along with the increase of the adjustment stroke, and the variable resistance element (13) inputs an effective voltage which takes the synchronous voltage and synchronously increases along with the resistance value to the voltage stabilizing element (9) when the resistance value of the variable resistance element increases.
2. A laser as claimed in claim 1, characterized in that the adjustment travel of the varistor element (13) is increased or decreased manually.
3. A laser as claimed in claim 1, characterized in that the adjustment travel of the varistor element (13) is increased or decreased under the drive of an electric actuator.
4. The laser according to claim 1, characterized in that the arithmetic unit (11) is connected with a magnetic attraction element (15), the magnetic attraction element (15) is controllably connected with an adjusting element (16), and when the arithmetic unit (11) detects that there is an increment voltage, the magnetic attraction element (15) controls the adjusting element (16) to act so that the first switch (10) and the second switch (12) complete synchronous actions.
5. The laser according to claim 4, characterized by comprising a housing (17), wherein a rotating groove (18) is formed in the housing (17), the first switch (10) and the second switch (12) are respectively arranged on two sides of the rotating groove (18), the adjusting element (16) is arranged in the rotating groove (18), and the magnetic element (15) is further arranged on one side of the rotating groove (18);
when the magnetic element (15) is triggered, the position of the adjusting element (16) in the rotary groove (18) changes, so that the switch states of the first switch (10) and the second switch (12) are changed at the same time, and the rotation stroke of the adjusting element (16) is the adjustment stroke of the variable resistance element (13).
6. The laser according to claim 5, characterized in that a first accommodating groove (19) is formed on one surface of the rotating groove (18), and the first accommodating groove (19) is used for accommodating the first switch (10).
7. The laser according to claim 5, wherein a second accommodating groove (20) is formed on one surface of the rotating groove (18), and the second accommodating groove (20) is used for accommodating the second switch (12).
8. The laser according to claim 5, characterized in that the end of the housing (17) is provided with a heat dissipation cavity (21), four sides of the heat dissipation cavity (21) are provided with openings (22), and a heat dissipation element (23) is arranged in the heat dissipation cavity (21).
9. The laser according to claim 8, characterized in that the end of the housing (17) is further provided with a power socket (24).
10. The laser according to claim 1, further comprising a nozzle (25) and a measured surface (26) detachably connected below the nozzle (25), wherein the measured surface (26) corresponds to a focusing plane, and the collimated light beam emitted by the collimated light source module (1) is a semicircular laser beam, and the collimated light beam is finally imaged on the measured surface (26);
the device comprises a measured surface (26), and is characterized by further comprising an imaging sensor (27), wherein the imaging sensor (27) is used for detecting the shape of a light spot on the measured surface (26) and calculating a defocusing distance according to the shape and the size of the light spot, the variable resistance element (13) comprises a first variable resistance unit (28) and a second variable resistance unit (29), the resistance value of the first variable resistance unit (28) increases in a logarithmic growth curve along with the increase of an adjusting stroke, due resistance compensation quantity of a real-time tracking adjusting stroke is generated according to the variable of the defocusing distance and the increment of the adjusting stroke during first focusing, the corresponding relation between the due resistance compensation quantity and the adjusting stroke is used as the resistance value output characteristic of the second variable resistance unit (29) to be used for outputting a corresponding compensation resistance value during refocusing, and the first variable resistance unit (28) and the second variable resistance unit (29) are connected in series and are respectively connected with the voltage output unit (14).
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| CN202310691636.4A CN116454718B (en) | 2023-06-13 | 2023-06-13 | Laser device |
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| CN202310691636.4A CN116454718B (en) | 2023-06-13 | 2023-06-13 | Laser device |
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| CN116454718B true CN116454718B (en) | 2023-08-11 |
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