CN113594845B - Point changing device and method for nonlinear crystal in laser - Google Patents
Point changing device and method for nonlinear crystal in laser Download PDFInfo
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- CN113594845B CN113594845B CN202111147554.0A CN202111147554A CN113594845B CN 113594845 B CN113594845 B CN 113594845B CN 202111147554 A CN202111147554 A CN 202111147554A CN 113594845 B CN113594845 B CN 113594845B
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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
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
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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
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/109—Frequency multiplication, e.g. harmonic generation
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Abstract
The invention provides a point changing device and a point changing method for a nonlinear crystal in a laser, which comprise the following steps: a temperature control table in contact with the first mounting plane for placing a nonlinear crystal; a first elastic member in contact with the first side for limiting movement of the nonlinear crystal on the temperature control stage; the linear driving device is contacted with the second side surface and used for pushing the nonlinear crystal to move; and a controller connected with the linear driving device and used for controlling the linear driving device to move; the linear driving device pushes the crystal to move in a direction parallel to the first crystal light-passing plane and the second crystal light-passing plane. The invention has the advantages of simple structure, convenient operation and contribution to large-scale industrial production and manufacture of the laser.
Description
Technical Field
The invention relates to the technical field of frequency doubling/frequency combination/difference frequency of lasers, in particular to a point changing device and method for a nonlinear crystal in a laser.
Background
The laser has rapid development in the application fields of precision machining such as 3C electronics, automobile manufacturing, medical instrument processing and the like. The laser with different wavelengths has different processing effects on different processing materials such as glass, ceramics, PCB boards, copper plates, plastics (PPS, PPA) and the like. Therefore, in the field of industrial lasers, a technique of obtaining different wavelengths (frequency doubling/frequency combining/difference frequency) by using fundamental laser through a nonlinear crystal is widely used in recent years. Meanwhile, the industrial application scenes are complicated and changeable, and higher requirements are provided for the long-acting and stable output of the multi-wavelength laser using the nonlinear crystal under the complex environment.
In order to meet the market application requirement of higher power of frequency doubling and frequency combining lasers, the efficiency of converting fundamental frequency light into frequency doubling light is often required to be improved. Therefore, the spot size of the fundamental light incident on the nonlinear crystal surface is very small (the diameter is only a few hundred micrometers), and the Q-switched peak power is extremely high. In this case, the instantaneous energy densities of the incident point and the exit point of the nonlinear crystal fundamental frequency light are very high; the interface light-passing point of the film layer (without the film layer) is easy to be damaged, so that the output power of the laser is reduced, the light spot mode is poor, and even the laser cannot be used. In order to solve the problem, the industry generally recovers the light output power of the laser by replacing the point of the nonlinear crystal, so as to prolong the service time of the whole equipment.
Since the nonlinear crystal conversion efficiency is sensitive to the matching angle, the matching temperature is very sensitive; the small position, angle deviation or temperature change can have great influence on parameters such as output laser power/roundness/divergence angle after the nonlinear crystal moves and changes points. Most of point changing devices for nonlinear crystals in a laser at present have the problems of low moving precision, complex structure, complex moving logic, weak interference resistance and the like.
Therefore, there is a need for an improved spot changing device for a nonlinear crystal in a laser, which simplifies the structure of the spot changing device for a nonlinear crystal in a laser.
Disclosure of Invention
The invention aims to provide a point changing device and a point changing method for a nonlinear crystal in a laser, which aim to solve the problem that the existing point changing device for the nonlinear crystal in the laser is complex in structure.
In order to solve the above technical problem, the present invention provides a switching device for a nonlinear crystal in a laser, where the nonlinear crystal includes a first crystal light-passing plane, a second crystal light-passing plane parallel to the first crystal light-passing plane, a first mounting plane connecting the first crystal light-passing plane and the second crystal light-passing plane, a second mounting plane connecting the first crystal light-passing plane and the second crystal light-passing plane and opposite to the first mounting plane, a first side surface connecting the first mounting plane and the second mounting plane, and a second side surface opposite to the first side surface and connecting the first mounting plane and the second mounting plane, and the switching device for a nonlinear crystal in a laser includes: a temperature control table in contact with the first mounting plane for placing a nonlinear crystal; a first elastic member in contact with the first side for limiting movement of the nonlinear crystal on the temperature control stage; the linear driving device is contacted with the second side surface and used for pushing the nonlinear crystal to move; and a controller connected with the linear driving device and used for controlling the linear driving device to move; the linear driving device pushes the crystal to move in a direction parallel to the first crystal light-passing plane and the second crystal light-passing plane.
Optionally, the controller is further connected to the temperature console, and is further configured to synchronously control temperature adjustment of the temperature console.
Optionally, the temperature control device further comprises a second elastic piece which is in contact with the second mounting surface and used for pressing the nonlinear crystal on the temperature control platform.
Optionally, the second elastic member is one of a plate spring or a spring device connected to the sheet member or the plate member using a coil spring.
Optionally, the first side surface, the second mounting surface and the second side surface are flat surfaces.
Optionally, the first elastic member is one of a plate spring or a spring device connected to the sheet member or the plate member using a coil spring.
Optionally, the linear driving device is an electric push rod.
Optionally, the temperature control platform comprises a main body which is in contact with the first mounting plane and is used for placing the nonlinear crystal, a heating/cooling element arranged in the main body, and a temperature sensing element arranged in the main body; the controller comprises a motor parameter control unit for controlling the action of the linear driving device, a temperature control unit for controlling the temperature regulation of the heating/refrigerating element, a data storage unit for storing each group of incident points and emergent points and the temperature of a temperature control table corresponding to each group of incident points and emergent points, and a data processing unit for processing the information of the motor parameter control unit, the temperature sensing element, the data storage unit and the temperature control unit and outputting control signals to the temperature control unit and the motor parameter control unit.
The invention also provides a point changing method for a nonlinear crystal in a laser, wherein the nonlinear crystal comprises a first crystal light-transmitting plane, a second crystal light-transmitting plane parallel to the first crystal light-transmitting plane, a first mounting plane connecting the first crystal light-transmitting plane and the second crystal light-transmitting plane, a second mounting plane connecting the first crystal light-transmitting plane and the second crystal light-transmitting plane and opposite to the first mounting plane, a first side surface connecting the first mounting plane and the second mounting plane, and a second side surface opposite to the first side surface and connecting the first mounting plane and the second mounting plane, and the method comprises the following steps: placing the nonlinear crystal on a temperature control table, and enabling the first installation plane to be in contact with the temperature control table; contacting the first side of the nonlinear crystal with a first elastic member and limiting the movement of the nonlinear crystal on the temperature control table by the first elastic member; enabling the second side surface of the nonlinear crystal to be in contact with a linear driving device, and pushing the nonlinear crystal to move through the linear driving device; connecting the linear driving device with a temperature control table, and controlling the linear driving device to move through a controller; the linear driving device pushes the crystal to move in a direction parallel to the first crystal light-passing plane and the second crystal light-passing plane.
Optionally, when the linear driving device is controlled by the controller to move, the method for switching the point of the nonlinear crystal in the laser further includes: the temperature of the temperature control console is synchronously controlled through the controller.
The invention provides a point changing device and method for a nonlinear crystal in a laser, which have the following beneficial effects:
the point changing device for the nonlinear crystal in the laser can realize point position adjustment of the nonlinear crystal only through the linear driving device, the temperature control table, the first elastic piece and the controller, so that the point changing device for the nonlinear crystal in the laser is simple in structure, convenient to operate and beneficial to large-scale industrial production and manufacturing of the laser. Meanwhile, the point position of the nonlinear crystal is adjusted in a mode that the thrust of the linear driving device is balanced with the thrust of the first elastic piece and the friction force borne by the nonlinear crystal, so that the nonlinear crystal can be accurately positioned, the positioning reliability is high, and the nonlinear crystal is not interfered by internal or external photoelectric signals. And the output consistency of the laser before and after point shifting is good, and the service life of the nonlinear crystal in the multi-wavelength laser can be prolonged. In addition, an external light path does not need to be recalibrated, and efficient automatic production of a processing line is facilitated.
Drawings
FIG. 1 is a schematic diagram of a structure of a spot changing device for a nonlinear crystal in a laser according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the optical path of laser light through a nonlinear crystal in an embodiment of the present invention;
fig. 3 is another schematic structural diagram of a point changing device for a nonlinear crystal in a laser according to an embodiment of the present invention.
Description of reference numerals:
100-nonlinear crystals; 110-first crystal clear plane; 120-a second mounting surface; 130-a second side;
200-temperature console;
300-a first resilient member;
400-linear drive means;
500-a controller;
600-a second elastic member.
Detailed Description
The present invention provides a device and a method for changing a point of a nonlinear crystal in a laser, which are described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a point changing device for a nonlinear crystal in a laser according to an embodiment of the present invention, which provides a point changing device for a nonlinear crystal in a laser, where the nonlinear crystal 100 includes a first crystal clear plane 110, a second crystal light-transmitting plane parallel to the first crystal light-transmitting plane, a first mounting plane connecting the first crystal light-transmitting plane 110 and the second crystal light-transmitting plane, a second mounting plane connecting the first crystal light-transmitting plane 110 and the second crystal light-transmitting plane and opposite to the first mounting plane 120, a first side surface connecting the first mounting plane and the second mounting plane 120, a second side 130 opposite to the first side and connecting the first mounting plane and the second mounting plane 120, the point changing device for a nonlinear crystal in a laser comprises: a temperature control stage 200 in contact with the first mounting plane for placing nonlinear crystal 100; a first elastic member 300 in contact with the first side for restricting the movement of the nonlinear crystal 100 on the temperature control stage 200; a linear driving device 400 contacting with the second side 130 for driving the nonlinear crystal 100 to move; and a controller 500 connected to the linear driving device 400 for controlling the linear driving device 400 to move; the linear driving device 400 pushes the crystal to move in a direction parallel to the first crystal light-passing plane 110 and the second crystal light-passing plane.
Since the temperature control stage 200 is in contact with the first mounting plane for placing the nonlinear crystal 100, the first elastic member 300 is in contact with the first side surface and is used for limiting the movement of the nonlinear crystal 100 on the temperature control stage 200, and the linear driving device 400 is in contact with the second side surface 130 and is used for pushing the nonlinear crystal 100 to move, the position of the nonlinear crystal 100 on the temperature control stage 200 can be adjusted by the linear driving device 400. Since the first crystal light-transmitting plane 110 is parallel to the second crystal light-transmitting plane, and the linear driving device 400 pushes the crystal to move in a direction parallel to the first crystal light-transmitting plane 110 and the second crystal light-transmitting plane, when the laser is incident from a point before the movement of the nonlinear crystal 100 and is refracted by the nonlinear crystal 100 after being incident from a point after the movement, the emergent light does not change, so that the point position adjustment of the nonlinear crystal 100 is realized while the characteristics of the emergent light, such as the direction and the angle of the emergent light, are not changed. The point changing device for the nonlinear crystal in the laser can realize point position adjustment of the nonlinear crystal 100 only through the linear driving device 400, the temperature control table 200, the first elastic piece 300 and the controller 500, so that the point changing device for the nonlinear crystal in the laser is simple in structure, convenient to operate and beneficial to large-scale industrial production and manufacturing of the laser. Meanwhile, the point position of the nonlinear crystal 100 is adjusted in a manner that the thrust of the linear driving device 400 is balanced with the thrust of the first elastic member 300 and the friction force applied to the nonlinear crystal 100, so that the nonlinear crystal 100 can be accurately positioned, the positioning reliability is high, and the interference of internal or external photoelectric signals is avoided. And the output consistency of the laser before and after the point shifting is good, and the service life of the nonlinear crystal 100 in the multi-wavelength laser can be prolonged. In addition, an external light path does not need to be recalibrated, and efficient automatic production of a processing line is facilitated.
The controller 500 is further connected to the temperature console 200, and is further configured to synchronously control the temperature of the temperature console 200.
Because the controller 500 is connected to the linear driving device 400 and the temperature console 200 and is used for controlling the linear driving device 400 to move and synchronously controlling the temperature of the temperature console 200 to adjust the temperature, the temperature of the contact position of the temperature console 200 and the first installation plane can be synchronously adjusted when the point is shifted, so that the temperature environment of the nonlinear crystal 100 is not changed, the point position adjustment of the nonlinear crystal 100 is further ensured, the characteristic of the emergent light is not changed, and the laser can be stably output.
The controller 500 controls the linear driving device 400 to drive the nonlinear crystal 100 to move along a direction parallel to the light passing plane 110 of the first crystal and the light passing plane of the second crystal, so as to change the relative positions of the incident laser and the emergent laser on the nonlinear crystal 100. For example, as shown in fig. 2, fig. 2 is a schematic diagram of an optical path of laser light passing through the nonlinear crystal 100 in the embodiment of the present invention, before moving, the laser light enters at a point a1 and exits at a point B1 of the nonlinear crystal 100; after moving, the light enters at the point A2 and exits at the point B2. Before and after the movement, the position, direction and angle of the emergent laser (laser after frequency conversion) light do not change.
As can be seen from the above, in this embodiment, during the movement of the nonlinear crystal 100, the positions of the incident light and the outgoing light relative to the temperature control stage 200 are unchanged, and the relative positions of the incident light and the outgoing light on the nonlinear crystal 100 are changed.
The first side surface, the second mounting surface 120 and the second side surface 130 may be a plane, a curved surface or both.
The first mounting plane is a heat dissipation surface of the nonlinear crystal 100.
Preferably, the first side surface, the second mounting surface 120 and the second side surface 130 are flat surfaces, which facilitates good contact with the first elastic member 300, the second elastic member 600 and the linear driving device 400.
The nonlinear crystal may be cubic or other hexahedral shape.
The nonlinear crystal 100 may be LBO (lithium triborate crystal), BBO (low temperature phase barium metaborate), KDP (potassium dihydrogen phosphate crystal), or the like. The nonlinear crystal 100 with different sizes and different shapes can be selected according to the factors such as the incident angle of laser, the size of laser facula, the number of design change points and the like.
The first elastic member 300 may be one of a plate spring or a spring device connected to a sheet or plate using a coil spring. Wherein, when the first elastic member 300 is a spring device connected to the sheet or plate member using a coil spring, the sheet or plate member of the spring device connected to the sheet or plate member using a coil spring is in contact with the first side of the nonlinear crystal 100.
In this embodiment, the number of the first elastic members 300 may be one or more.
The point changing device for the nonlinear crystal in the laser further comprises a second elastic part 600 which is in contact with the second mounting surface 120 and is used for pressing the nonlinear crystal 100 on the temperature control table 200, so that the moving stability of the nonlinear crystal 100 in the point changing device for the nonlinear crystal in the laser can be improved, and the point changing precision of the nonlinear crystal 100 can be further improved.
The second elastic member 600 may be one of a plate spring or a spring device connected to a sheet or plate using a coil spring. Wherein, when the second elastic member 600 is a spring device connected to the sheet-like member or the plate-like member using a coil spring, the sheet-like member or the plate-like member in the spring device connected to the sheet-like member or the plate-like member using the coil spring is in contact with the second mounting surface 120 of the nonlinear crystal 100.
In this embodiment, the number of the second elastic members 600 may be one or more.
Specifically, in this embodiment, as shown in fig. 1, the first elastic member 300 is a leaf spring, and the second elastic member 600 is a spring device connected to the leaf member or the plate member by a coil spring. In another embodiment, as shown in fig. 3, fig. 3 is another structural diagram of a point changing device for a nonlinear crystal in a laser according to an embodiment of the present invention, in which the first elastic member 300 is a spring device connected to a sheet-like member or a plate-like member by a coil spring, and the second elastic member 600 is a sheet spring.
The linear driving device 400 may be an electric push rod. The electric push rod can be driven by a stepping motor, a servo motor or a linear motor. The linear drive 400 may or may not incorporate a position encoder.
Specifically, the temperature control stage 200 includes a main body contacting the first mounting plane for placing the nonlinear crystal 100, a heating/cooling element disposed in the main body and connected to the controller 500, and a temperature sensing element disposed in the main body; the controller 500 includes a motor parameter control unit for controlling the motion of the linear driving device 400, a temperature control unit for controlling the temperature adjustment of the heating/cooling element, a data storage unit for storing each set of the incident point and the exit point and the temperature of the temperature control table 200 corresponding to each set of the incident point and the exit point, and a data processing unit for processing the information of the motor parameter control unit, the temperature sensing element, the data storage unit and the temperature control unit and outputting a control signal to the temperature control unit and the motor parameter control unit.
When the nonlinear crystal 100 moves from the current point location to the current point location, the data processing unit reads the set of incident point and exit point corresponding to the target point location and the data of the temperature console 200 corresponding to the set of incident point and exit point from the data storage unit, processes the read data and the temperature information of the temperature console 200 fed back by the temperature sensing element and outputs a control signal to the temperature control unit and the motor parameter control unit, and then the temperature control unit controls the heating/cooling element to adjust the temperature, and the motor parameter control unit controls the linear driving device 400 to operate.
Wherein the data storage unit may store a plurality of sets of the incident point and the exit point, and data of the temperature console 200 corresponding to the plurality of sets of the incident point and the exit point.
When the second elastic member 600 is not provided, the nonlinear crystal 100 is subjected to three forces in the moving direction: a frictional force F1 of the temperature control stage 200 and the nonlinear crystal 100, a thrust force F3 of the first elastic member 300, a thrust force F4 of the linear driving device 400; the position of the nonlinear crystal 100 remains unchanged when F4= F3+ F1. When nonlinear crystal 100 is set on temperature control stage 200, frictional force F1 between temperature control stage 200 and nonlinear crystal 100 is constant, and the amount of expansion and contraction of first elastic member 300 is changed by controlling the thrust of linear drive 400. By the method, the nonlinear crystal 100 can be precisely moved on the temperature control table in one dimension, so that the point position of the nonlinear crystal 100 can be precisely positioned.
When the second elastic member 600 is provided, the nonlinear crystal 100 is subjected to four forces in the moving direction: a friction force F1 of the temperature control stage 200 and the nonlinear crystal 100, a friction force F2 between the second elastic member 600 and the nonlinear crystal 100, a thrust force F3 of the first elastic member 300, and a thrust force F4 of the linear driving device 400; the position of the nonlinear crystal 100 remains determined when F4= F3+ F2+ F1. When the position of the second elastic member 600 is not changed, the frictional force F1 between the temperature control stage 200 and the nonlinear crystal 100 and the frictional force F2 between the second elastic member 600 and the nonlinear crystal 100 are constant, and the amount of expansion and contraction of the first elastic member 300 is changed by controlling the linear driving device 400. By the method, the nonlinear crystal 100 can be precisely moved on the temperature control table in one dimension, so that the precise positioning of the crystal is realized.
The embodiment further provides a point changing method for a nonlinear crystal in a laser, where the nonlinear crystal 100 includes a first crystal light-passing plane 110, a second crystal light-passing plane parallel to the first crystal light-passing plane, a first mounting plane connecting the first crystal light-passing plane 110 and the second crystal light-passing plane, a second mounting plane 120 connecting the first crystal light-passing plane 110 and the second crystal light-passing plane and opposite to the first mounting plane, a first side connecting the first mounting plane and the second mounting plane 120, and a second side 130 opposite to the first side and connecting the first mounting plane and the second mounting plane 120, and the method includes: placing nonlinear crystal 100 on temperature console 200 with the first mounting plane in contact with temperature console 200; contacting a first side of the nonlinear crystal 100 with the first elastic member 300 and restricting the movement of the nonlinear crystal 100 on the temperature control stage 200 by the first elastic member 300; contacting the second side 130 of the nonlinear crystal 100 with a linear driving device 400, and pushing the nonlinear crystal 100 to move through the linear driving device 400; the linear driving device 400 is connected with the temperature control table 200, and the linear driving device 400 is controlled to move through the controller 500 and synchronously controls the temperature of the temperature control table 200 to be adjusted; the linear driving device 400 pushes the crystal to move in a direction parallel to the first crystal light-passing plane 110 and the second crystal light-passing plane.
Before the linear driving device 400 is controlled by the controller 500 to move and the temperature of the temperature control table 200 is synchronously controlled to adjust the temperature, the method for changing the point of the nonlinear crystal in the laser further comprises the following steps: the second mounting surface 120 of the nonlinear crystal 100 is brought into contact with the second elastic member 600 to press the nonlinear crystal 100 against the temperature control stage 200 via the second elastic member 600.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. A spot changing apparatus for a nonlinear crystal in a laser, the nonlinear crystal including a first crystal pass-light plane, a second crystal pass-light plane parallel to the first crystal pass-light plane, a first mounting plane connecting the first crystal pass-light plane and the second crystal pass-light plane, a second mounting plane connecting the first crystal pass-light plane and the second crystal pass-light plane and opposite to the first mounting plane, a first side connecting the first mounting plane and the second mounting plane, a second side opposite to the first side connecting the first mounting plane and the second mounting plane, the spot changing apparatus for a nonlinear crystal in a laser comprising:
a temperature control table in contact with the first mounting plane for placing a nonlinear crystal;
a first elastic member in contact with the first side for limiting movement of the nonlinear crystal on the temperature control stage;
the linear driving device is contacted with the second side surface and used for pushing the nonlinear crystal to move; and the number of the first and second groups,
the controller is connected with the linear driving device and is used for controlling the linear driving device to move;
the linear driving device pushes the crystal to move in a direction parallel to the first crystal light-passing plane and the second crystal light-passing plane.
2. The spot changing apparatus for a nonlinear crystal in a laser as claimed in claim 1 wherein said controller is further connected to said temperature console and is further configured to synchronously control temperature adjustment of said temperature console.
3. The spot changing apparatus for a nonlinear crystal in a laser as claimed in claim 1 further comprising a second elastic member in contact with said second mounting surface for pressing the nonlinear crystal against said temperature control stage.
4. The spot changing apparatus for a nonlinear crystal in a laser as claimed in claim 3, wherein said second elastic member is one of a plate spring or a spring device connected to the plate or the plate using a coil spring.
5. The spot changing apparatus for a nonlinear crystal in a laser as claimed in claim 1 wherein said first side, second mounting surface and second side are planar.
6. The spot changing apparatus for a nonlinear crystal in a laser as claimed in claim 1, wherein said first elastic member is one of a plate spring or a spring device connected to a plate or a plate using a coil spring.
7. The spot changing apparatus for a nonlinear crystal in a laser as claimed in claim 1 wherein said linear driving means is an electric push rod.
8. The spot-changing apparatus for a nonlinear crystal in a laser as claimed in claim 1,
the temperature control platform comprises a main body which is in contact with the first mounting plane and used for placing a nonlinear crystal, a heating/cooling element arranged in the main body, and a temperature sensing element arranged in the main body;
the controller comprises a motor parameter control unit for controlling the action of the linear driving device, a temperature control unit for controlling the temperature regulation of the heating/refrigerating element, a data storage unit for storing each group of incident points and emergent points and the temperature of a temperature control table corresponding to each group of incident points and emergent points, and a data processing unit for processing the information of the motor parameter control unit, the temperature sensing element, the data storage unit and the temperature control unit and outputting control signals to the temperature control unit and the motor parameter control unit.
9. A method for switching a point of a nonlinear crystal in a laser, the nonlinear crystal including a first crystal pass-light plane, a second crystal pass-light plane parallel to the first crystal pass-light plane, a first mounting plane connecting the first crystal pass-light plane and the second crystal pass-light plane, a second mounting plane connecting the first crystal pass-light plane and the second crystal pass-light plane and opposite to the first mounting plane, a first side connecting the first mounting plane and the second mounting plane, and a second side opposite to the first side connecting the first mounting plane and the second mounting plane, the method comprising:
placing the nonlinear crystal on a temperature control table, and enabling the first installation plane to be in contact with the temperature control table;
contacting the first side of the nonlinear crystal with a first elastic member and limiting the movement of the nonlinear crystal on the temperature control table by the first elastic member;
enabling the second side surface of the nonlinear crystal to be in contact with a linear driving device, and pushing the nonlinear crystal to move through the linear driving device;
connecting the linear driving device with a temperature control table, and controlling the linear driving device to move through a controller;
the linear driving device pushes the crystal to move in a direction parallel to the first crystal light-passing plane and the second crystal light-passing plane.
10. The method of claim 9, wherein the method of changing the point of the nonlinear crystal in the laser further comprises, while the linear drive is controlled by the controller to move: the temperature of the temperature control console is synchronously controlled through the controller.
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