A laser crystal heat preservation device

Abstract

A laser crystal heat preservation device relates to the field of crystal heat preservation. The device includes a heating furnace body with a crystal receiving groove on its outer wall, a heating element connected to the furnace body, a cover plate, a sensor clamp, and a temperature sensor detachably connected to the sensor clamp. The two ends of the crystal receiving groove extend through both ends of the heating furnace body. The cover plate is configured to be detachably connected to the furnace body to confine the crystal within the crystal receiving groove. A detection groove matching the size of the sensor clamp is formed on the outer wall of the furnace body. The sensor clamp is configured to be inserted into the detection groove so that the temperature sensing surface of the temperature sensor is in contact with the inner wall of the detection groove. The laser crystal heat preservation device provided in this application can accurately measure the crystal temperature, thereby improving the temperature control stability of nonlinear crystals.

Description

Technical Field

[0001] This application relates to the field of crystal insulation, and more specifically, to a laser crystal insulation device. Background Technology

[0002] With the rapid application of laser technology in industry, military, medical and scientific research fields, people have put forward increasingly higher requirements for the different parameter properties of lasers. In order to generate photons with shorter wavelengths or higher energies, it is necessary to transform the frequency of the original laser through nonlinear effects. The frequency doubling or summing process requires the use of corresponding nonlinear crystals to match the changes through different temperatures or angles.

[0003] Existing crystal insulation devices or fixtures have been designed with insulation effect and structure in mind, aiming to achieve a better crystal insulation state while minimizing the impact of the surrounding environment. However, on the one hand, pursuing insulation effect makes structural design and installation more complicated. On the other hand, temperature is a key variable in the nonlinear transformation process of crystals, and existing crystal insulation devices have poor temperature control stability for nonlinear crystals, making it difficult to accurately monitor crystal temperature changes in real time. Summary of the Invention

[0004] The purpose of this application is to provide a laser crystal heat preservation device that can accurately and in real time control the temperature of the crystal furnace, thereby improving the temperature control stability of nonlinear crystals.

[0005] The embodiments of this application are implemented as follows:

[0006] This application provides a laser crystal heat preservation device, which includes a heating furnace body with a crystal receiving groove on its outer wall, a heating element connected to the heating furnace body, a cover plate, a sensor clamp, and a temperature sensor detachably connected to the sensor clamp. The two ends of the crystal receiving groove pass through the two ends of the heating furnace body, and the cover plate is configured to be detachably connected to the heating furnace body to confine the crystal within the crystal receiving groove. The outer wall of the heating furnace body has a detection groove that matches the size of the sensor clamp, and the sensor clamp is configured to be inserted into the detection groove so that the temperature sensing surface of the temperature sensor is in contact with the inner wall of the detection groove.

[0007] In some alternative embodiments, the cover plate is connected to a guide plate, which is connected to a pressure strip via at least one elastic element. When the cover plate is detachably connected to the heating furnace body, the pressure strip presses the crystal against the inner wall of the crystal receiving groove from above.

[0008] In some alternative implementations, an arc-shaped spring is also included, which elastically fixes the crystal to the inner wall of the crystal receiving groove from the side.

[0009] In some alternative implementations, the outer wall of the heating furnace body is provided with a spring slot that communicates with the crystal receiving slot and accommodates the spring.

[0010] In some alternative implementations, an installation groove communicating with the bottom wall of the crystal receiving groove is provided on the side of the outer wall of the heating furnace body opposite to the spring slot.

[0011] In some alternative implementations, the bottom wall of the heating furnace body is provided with a fixing groove adapted to the shape of the heating element, and the heating element is a sheet-shaped heating element connected in the fixing groove.

[0012] In some optional embodiments, a rotating tray is also included that is detachably connected to the top of the heating furnace body. The rotating tray has a positioning hole in the center and multiple arc-shaped mounting screw holes. At least one heat insulation gasket is provided between the rotating tray and the heating furnace body.

[0013] In some alternative implementations, a heat insulation cover is also included that is detachably attached to the rotating tray, the heat insulation cover and the rotating tray working together to wrap around the heating furnace body.

[0014] In some alternative implementations, an irradiation hole is provided at each end of the heat insulation cover, and the two irradiation holes are aligned with the crystal in the crystal receiving groove.

[0015] In some alternative implementations, one end of the sensor clamp is provided with a sensor slot for clamping a temperature sensor, and the bottom wall of the sensor slot is provided with a pin hole. When the temperature sensor is clamped in the sensor slot, the pins extend through the pin hole to the other end of the sensor clamp. The outer wall of the heating furnace body is provided with a limiting groove located on the side of the detection groove. The limiting groove is configured to allow pluggable limiting elements to fix or release the sensor clamp.

[0016] The beneficial effects of this application are as follows: The laser crystal heat preservation device provided by this application includes a heating furnace body with a crystal receiving groove on its outer wall, a heating element connected to the heating furnace body, a cover plate, a sensor clamp, and a temperature sensor detachably connected to the sensor clamp. The two ends of the crystal receiving groove pass through both ends of the heating furnace body. The cover plate is configured to be detachably connected to the heating furnace body to confine the crystal within the crystal receiving groove. A detection groove matching the size of the sensor clamp is opened on the outer wall of the heating furnace body. The sensor clamp is configured to be inserted into the detection groove so that the temperature sensing surface of the temperature sensor is in contact with the inner wall of the detection groove. The laser crystal heat preservation device provided by this application can accurately and in real-time control the temperature of the crystal furnace, thereby improving the temperature control stability of the nonlinear crystal. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A first-view exploded structural diagram of the laser crystal heat preservation device provided in the embodiments of this application when it does not include a protective cover;

[0019] Figure 2 A second-view structural schematic diagram of the laser crystal heat preservation device provided in the embodiments of this application, excluding the protective cover, cover plate, guide plate, compression spring, and pressure strip;

[0020] Figure 3 A third-view structural schematic diagram of the laser crystal heat preservation device provided in the embodiments of this application, excluding the protective cover;

[0021] Figure 4 This is a schematic diagram of the structure of the rotating tray of the laser crystal heat preservation device provided in the embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the heating furnace body of the laser crystal heat preservation device provided in the embodiments of this application;

[0023] Figure 6 This is a schematic diagram of the sensor fixture and temperature sensor of the laser crystal heat preservation device provided in the embodiments of this application;

[0024] Figure 7 This is a schematic diagram of the sensor fixture of the laser crystal heat preservation device provided in the embodiments of this application;

[0025] Figure 8 This is a schematic diagram showing the connection between the heat preservation cover, heating furnace body, and rotating tray of the laser crystal heat preservation device provided in the embodiments of this application.

[0026] In the diagram: 100, heating furnace body; 101, first bolt hole; 102, fourth bolt hole; 110, crystal receiving slot; 120, heating element; 130, cover plate; 131, second bolt hole; 140, sensor fixture; 141, sensor slot; 142, pin hole; 143, limiting slot; 150, temperature sensor; 160, detection slot; 170, guide plate; 171, third bolt hole; 180, compression spring; 190, pressure... 200, spring; 210, spring slot; 220, mounting slot; 230, fixing slot; 240, rotating tray; 241, through hole; 242, pin connecting block; 243, heat insulation bolt hole; 244, heat insulation bolt; 245, connecting hole; 246, arc-shaped mounting screw hole; 250, positioning hole; 260, heat insulation washer; 270, heat insulation cover; 280, irradiation hole; 290, fixing block; 291, fixing hole; 300, crystal. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The features and performance of the laser crystal heat preservation device of this application will be further described in detail below with reference to the embodiments.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown in the figure, this application provides a laser crystal heat preservation device, which includes a heating furnace body 100 with a crystal receiving groove 110 on the top, a cover plate 130, a sensor clamp 140, and a temperature sensor 150 detachably connected to the sensor clamp 140. The two ends of the crystal receiving groove 110 pass through the two ends of the heating furnace body 100 to accommodate crystals 300 for heat preservation. The bottom wall of the heating furnace body 100 is provided with a sheet-like heating element 120, which is used to heat the heating furnace body 100 to heat and preserve the crystals 300 in the crystal receiving groove 110. The top of the heating furnace body 100 is provided with four first bolt holes 101, and the cover plate 130 is provided with four second bolt holes 131 corresponding to the first bolt holes 101. The heating furnace body 100 and the cover plate 130 are connected by four bolt holes 101 and four second bolt holes 131. Bolts passing through the second bolt hole 131 and the first bolt hole 101 are detachably connected. When the cover plate 130 is connected to the top of the heating furnace body 100, it confines the crystal 300 within the crystal receiving groove 110 from the top. A cylindrical detection groove 160 is provided on one side of the outer wall of the heating furnace body 100. The sensor clamp 140 is cylindrical and has a sensor slot 141 at one end for clamping the temperature sensor 150. The bottom wall of the sensor slot 141 has a pin hole 142. When the temperature sensor 150 is clamped in the sensor slot 141, the pins pass through the pin hole 142 and extend out of the other end of the sensor clamp 140. The sensor clamp 140 can be inserted into the detection groove 160 so that the temperature sensing surface of the temperature sensor 150 is in contact with the bottom wall of the detection groove 160. The outer wall of the heating furnace body 100 has a limiting groove 143 located on the side of the detection groove 160. In other optional embodiments, the detection groove 160 and the sensor clamp 140 can also be cubic, cuboid, prism or other shapes.

[0036] The laser crystal heat preservation device provided in this application embodiment connects a sheet-like heating element 120 to the bottom wall of the heating furnace body 100 and fixes a small-sized temperature sensor 150 to a sensor clamp 140. Then, the sensor clamp 140 is detachably inserted into the detection groove 160 on the side wall of the heating furnace body 100. This effectively reduces the size of the heating furnace body 100 to reduce the overall volume of the device, significantly shortens the heating speed of the heating furnace body 100, and effectively improves the temperature regulation response speed of the heating furnace body 100, shortens the start-up time of the laser, and improves the operating efficiency of the laser. At the same time, by having the temperature sensing surface of the temperature sensor 150 attached to the bottom wall of the detection groove 160, accurate and rapid measurement of the temperature of the heating furnace body 100 can be achieved, thereby adjusting the temperature of the heating furnace body 100 in real time to complete the adjustment and maintenance of the crystal temperature. Because the surface smoothness and flatness of the temperature sensor 150 are poor compared to mechanical surfaces, it is difficult to achieve a good fit between the temperature sensor 150 and the surface of the crystal 300. Moreover, the temperature sensor 150 and the heating furnace body 100 are made of different materials, resulting in uneven temperature steady-state distribution when the temperature sensor 150 is in direct contact with the crystal 300. Therefore, by attaching the temperature sensing surface of the temperature sensor 150 to the inner wall of the detection groove 160 on the outside of the crystal receiving groove 110, accurate and rapid measurement of the temperature of the heating furnace body 100 can be achieved.

[0037] Among them, such as Figure 5 As shown, the bottom wall of the heating furnace body 100 has a fixing groove 230 that matches the shape of the heating element 120. The heating element 120 is bonded and cured in the fixing groove 230 by thermally conductive silicone grease. This improves the tightness of the connection between the heating element 120 and the heating furnace body 100, thereby increasing heat transfer efficiency, and also reduces the space occupied by the heating element 120, thus reducing its volume. In other optional embodiments, the heating element 120 can also be detachably connected to the fixing groove 230 by elastic bolts, welded to the fixing groove 230, or integrally formed with the fixing groove 230.

[0038] like Figure 6 and Figure 7 As shown, when the sensor clamp 140 is inserted into the detection groove 160 and the temperature sensing surface of the temperature sensor 150 is in contact with the inner wall of the detection groove 160, the operator can insert the screw of the limiting member, such as the limiting screw, into the limiting groove 143 connected to the outer wall of the heating furnace body 100 through the thread, and use the nut of the limiting screw to press the sensor clamp 140 to keep the sensor clamp 140 inserted into the detection groove 160, so as to prevent the sensor clamp 140 from coming out of the detection groove 160. When it is necessary to disassemble and remove the sensor clamp 140 and the temperature sensor 150, it is only necessary to remove the limiting member first to remove the sensor clamp 140 and the temperature sensor 150 from the detection groove 160. In other optional embodiments, the limiting member and the detection groove 160 can also be snap-fit ​​connected.

[0039] like Figure 1 As shown, in the laser crystal heat preservation device provided in this application embodiment, the cover plate 130 is connected to the guide plate 170, and the guide plate 170 is connected to the pressure strip 190 made of high temperature heat insulation material through three compression springs 180. When the cover plate 130 is attached to the heating furnace body 100, the pressure strip 190 presses the crystal against the inner wall of the crystal receiving groove 110 from the top. The guide plate 170 is provided with four third bolt holes 171 that correspond one-to-one with the first bolt hole 101 and the second bolt hole 131. The cover plate 130, the guide plate 170 and the top of the heating furnace body 100 are detachably connected together by four bolts that pass through the second bolt hole 131, the third bolt hole 171 and the first bolt hole 101 in sequence.

[0040] By setting a guide plate 170 connected to the cover plate 130, when the cover plate 130 and the guide plate 170 are connected to the top of the heating furnace body 100, the guide plate 170 extends into the crystal receiving groove 110 at the top of the heating furnace body 100 through the pressure strip 190 connected to the compression spring 180 and presses against the crystal 300. Thus, the compression spring 180 and the pressure strip 190 cooperate to fix and press the crystal 300 against the furnace wall of the heating furnace body 100. The crystal 300 and the compression spring 180 are buffered by the pressure strip 190 to avoid the compression spring 180 directly contacting the crystal and bearing high temperature stress, which would damage the crystal 300, and to prevent the crystal 300 from losing heat.

[0041] In other alternative embodiments, the compression spring 180 may be replaced by a sheet spring or other elastic element. In other alternative embodiments, the number of elastic elements connecting the guide plate 170 and the pressure strip 190 may be one, two, four, or more.

[0042] like Figure 2 As shown in the embodiment of this application, in the laser crystal heat preservation device, the top wall of the heating furnace body 100 is provided with a spring plate groove 210 communicating with the crystal receiving groove 110. An arc-shaped spring plate 200 is provided inside the spring plate groove 210, which is used to elastically fix the crystal to the inner wall of the crystal receiving groove 110 from the side. The top wall of the heating furnace body 100 is provided with a mounting groove 220 communicating with the bottom wall of the crystal receiving groove 110. The spring plate groove 210 and the mounting groove 220 are respectively connected to both sides of the crystal receiving groove 110.

[0043] By providing an installation groove 220 that communicates with the bottom wall of the crystal receiving groove 110, operators can easily use clamps to reach into the crystal receiving groove 110 through the installation groove 220 to pick up the processed crystal 300. By providing a spring plate groove 210 that communicates with the crystal receiving groove 110, and providing a spring plate 200 in the spring plate groove 210 for elastically fixing the crystal to the inner wall of the crystal receiving groove 110, it is possible to ensure that the side wall of the crystal 300 is in more sufficient and tight contact with the side wall of the crystal receiving groove 110, thereby improving the temperature transfer efficiency. By pressing the top and side of the crystal 300 with the pressure strip 190 and the spring plate 200, the crystal 300 can be pressed tightly against the side wall of the crystal receiving groove 110, thereby achieving stable fixation of the crystal 300 and achieving good heat transfer.

[0044] like Figure 3 , Figure 4 and Figure 8 As shown, the laser crystal heat preservation device provided in this embodiment of the application also includes a rotating tray 240 and a heat preservation cover 270. The top of the rotating tray 240 is detachably connected to the bottom of the heating furnace body 100 by four special heat-insulating and high-temperature resistant heat-insulating bolts 244. The heat preservation cover 270 is made of aluminum and is detachably connected to the top surface of the rotating tray 240. The top of the rotating tray 240 and the bottom of the heating furnace body 100 are respectively provided with four heat-insulating bolt holes 243 and a fourth bolt hole 102 for connecting the heat-insulating bolts 244. Fixing blocks 290 are respectively connected to both sides of the heat preservation cover 270. The fixing block 290 is provided with fixing holes 291. The two fixing holes 291 are respectively connected to the connecting holes 245 opened on both sides of the rotating tray 240 by bolts. The center of the rotating tray 240 is provided with a positioning hole 250. The rotating tray 240 is also provided with four arc-shaped mounting screw holes 246. When the heat insulation cover 270 is connected to the top of the rotating tray 240, it cooperates with the rotating tray 240 to wrap the heating furnace body 100. The heat insulation cover 270 is provided with an irradiation hole 280 at each end. The two irradiation holes 280 and the crystal 300 in the crystal receiving groove 110 are in a straight line.

[0045] In other optional embodiments, the insulation cover 270 can also be made of materials such as stainless steel, Teflon, or PEEK. In other optional embodiments, a transparent lens seal can also be provided at the illumination hole 280 to improve insulation performance. In other optional embodiments, a plane window mirror and a Brewster window can also be respectively provided at the two illumination holes 280.

[0046] The laser crystal heat preservation device provided in this embodiment is connected to the heating furnace body 100 by a rotating tray 240 that can rotate around a central axis. The center and four corners of the rotating tray 240 are respectively provided with positioning holes 250 and arc-shaped mounting screw holes 246. The operator only needs to reserve positioning pin holes corresponding to the positioning holes 250 at fixed positions in the designed optical path and combine them with positioning pins to achieve the center positioning of the optical path and rotation around the axis of the laser crystal heat preservation device. This makes it convenient to rotate the laser crystal heat preservation device at a small angle when the fundamental frequency beam passes through the crystal 300, adjust the incident angle of the fundamental frequency beam entering the end face of the crystal 300 to match the frequency doubling conversion efficiency. After the adjustment is completed, the rotating tray 240 can be locked with bolts through the arc-shaped mounting screw holes 246.

[0047] Four heat-insulating washers 260 are provided between the top of the rotating tray 240 and the heating furnace body 100. Each heat-insulating washer 260 is fitted onto a heat-insulating bolt 244. The heat-insulating bolt 244 connecting the heating furnace body 100 and the rotating tray 240 is also a special high-temperature heat-insulating bolt. The heat-insulating washer 260 and the heat-insulating bolt 244 work together to reduce the heat conduction between the heating furnace body 100 and the rotating tray 240 to a low level, thereby reducing heat loss.

[0048] The rotating tray 240 is designed with four through holes 241 as lead-out channels for the heating element 120. The through holes 241 are symmetrically arranged. The top of the rotating tray 240 is also provided with a pin connection block 242 composed of a thin copper rod and insulating heat-resistant material. The pin connection block 242 is used to connect with the pins of the temperature sensor 150.

[0049] By setting a heat insulation cover 270 that covers the heating furnace body 100 and is connected to the rotating tray 240, the heating furnace body 100 can be located in a sealed space, reducing air flow and enhancing heat insulation performance. The heat insulation cover 270 has illumination holes 280 at both ends, each the same size as the cross-section of the crystal 300, allowing the fundamental frequency beam to pass through the illumination holes 280 to irradiate the crystal 300 and then exit through the other illumination hole 280. In other optional embodiments, the heat insulation cover 270 can also be made of a light-transmitting material. In this case, the heat insulation cover 270 does not need to have illumination holes 280; the fundamental frequency beam is directly transmitted into the heat insulation cover 270 to irradiate the crystal 300 and then exits through the heat insulation cover 270.

[0050] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A laser crystal heat preservation device, characterized in that, It includes a heating furnace body with a crystal receiving groove on its outer wall, a sheet-like heating element connected to the bottom wall of the heating furnace body, a cover plate, a sensor clamp, and a temperature sensor detachably connected to the sensor clamp. The two ends of the crystal receiving groove pass through the two ends of the heating furnace body, respectively. The cover plate is configured to be detachably connected to the heating furnace body to confine the crystal within the crystal receiving groove. The outer wall of the heating furnace body has a detection groove that matches the size of the sensor clamp. The sensor clamp is configured to be inserted into the detection groove so that the temperature sensing surface of the temperature sensor is in contact with the inner wall of the detection groove. The cover plate is connected to a guide plate, and the guide plate is connected to a pressure strip through at least one elastic element. When the cover plate is detachably connected to the heating furnace body, the pressure strip presses the crystal against the inner wall of the crystal receiving groove from above.

2. The laser crystal heat preservation device according to claim 1, characterized in that, It also includes an arc-shaped spring sheet, which elastically fixes the crystal to the inner wall of the crystal receiving groove from the side.

3. The laser crystal heat preservation device according to claim 2, characterized in that, The outer wall of the heating furnace is provided with a spring slot that communicates with the crystal receiving slot, and the spring slot accommodates the spring.

4. The laser crystal heat preservation device according to claim 3, characterized in that, The outer wall of the heating furnace body has an installation groove on the side opposite to the spring slot, which communicates with the bottom wall of the crystal receiving slot.

5. The laser crystal heat preservation device according to claim 1, characterized in that, The bottom wall of the heating furnace body is provided with a fixing groove adapted to the shape of the heating element, and the heating element is connected in the fixing groove.

6. The laser crystal heat preservation device according to claim 1, characterized in that, It also includes a rotating tray that is detachably connected to the top of the heating furnace body. The rotating tray has a positioning hole in the center and multiple arc-shaped mounting screw holes. At least one heat insulation gasket is provided between the rotating tray and the heating furnace body.

7. The laser crystal heat preservation device according to claim 6, characterized in that, It also includes a heat insulation cover that is detachably connected to the rotating tray, the heat insulation cover and the rotating tray working together to wrap around the heating furnace body.

8. The laser crystal heat preservation device according to claim 7, characterized in that, The heat insulation cover has an irradiation hole at each end, and the two irradiation holes are aligned with the crystal in the crystal receiving groove.

9. The laser crystal heat preservation device according to claim 1, characterized in that, One end of the sensor clamp is provided with a sensor slot for clamping a temperature sensor. The bottom wall of the sensor slot is provided with a pin hole. When the temperature sensor is clamped in the sensor slot, the pins pass through the pin hole and extend out of the other end of the sensor clamp. The outer wall of the heating furnace body is provided with a limiting groove located on the side of the detection groove. The limiting groove is configured to be a pluggable limiting member to fix or loosen the sensor clamp.

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