An air-tight, multi-dimensionally adjustable, non-linear transformation crystal device

Abstract

The application provides a hermetic multi-dimensionally adjusted nonlinear conversion crystal device, and relates to the technical field of optoelectronic devices.The hermetic multi-dimensionally adjusted nonlinear conversion crystal device comprises a shell assembly, a front mirror assembly which is sealingly connected to one end of the shell assembly, an output mirror assembly which is sealingly connected to the other end of the shell assembly, and a crystal assembly which is arranged in a sealed cavity formed by the front mirror assembly and the output mirror assembly in the shell assembly and filled with nitrogen gas with positive pressure.The application fills the sealed cavity with nitrogen gas with positive pressure, thereby effectively preventing the invasion of external humid air, providing protection for the crystal assembly, and fundamentally solving the problem of invalidation of nonlinear crystals such as LBO and BBO due to deliquescence, and greatly prolonging the service life of the entire laser system.

Description

Technical Field

[0001] This invention relates to the field of optoelectronic device technology, and more specifically, to a hermetically sealed, multi-dimensionally adjustable nonlinear conversion crystal device. Background Technology

[0002] In the field of optoelectronic device manufacturing, especially in the design and manufacture of all-solid-state lasers, nonlinear frequency conversion technology is a key means of extending laser wavelength. This technology relies on nonlinear crystals such as KTP, LBO, BBO, and CLBO to convert infrared laser light into visible light or even ultraviolet laser output through processes such as frequency doubling and sum-frequency conversion. However, high-performance crystals such as LBO, CLBO, and BBO are highly hygroscopic in natural environments, and will undergo deliquescence reactions with water vapor in the air, leading to crystal surface damage, a sharp deterioration in optical performance, and ultimately, laser failure.

[0003] To address this challenge, existing technologies typically employ active temperature control, which uses temperature control units such as TEC to maintain the crystal at a certain temperature to prevent condensation. This method requires continuous power supply even when the laser is not in operation, resulting in huge energy consumption and complete failure in power outage scenarios such as transportation and storage. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a hermetically sealed, multi-dimensionally adjustable nonlinear transformation crystal device.

[0005] The present invention provides an airtight, multi-dimensional adjustable nonlinear conversion crystal device, comprising: a housing assembly; a front mirror assembly sealed to one end of the housing assembly; an output mirror assembly sealed to the other end of the housing assembly, wherein the output mirror assembly and the front mirror assembly form a sealed cavity inside the housing assembly, the sealed cavity being filled with positive pressure nitrogen gas; and a crystal assembly disposed within the sealed cavity.

[0006] Optionally, the housing assembly includes: an L-shaped end plate; a top end plate connected to the top of the L-shaped end plate; a housing connected inside the L-shaped end plate; and a panel connected to one side of the L-shaped end plate.

[0007] Optionally, the front lens assembly includes: a first clamping adjustment seat connected to the panel; a front lens barrel connected to the first clamping adjustment seat; and a first adjustment unit disposed on the first clamping adjustment seat for adjusting the tilt angle of the front lens barrel.

[0008] Optionally, the output mirror assembly includes: an output mirror barrel; a second clamping adjustment seat, one side of which is connected to the output mirror barrel; an output mirror, connected to the other side of the second clamping adjustment seat; and a second adjustment unit, disposed on the second clamping adjustment seat, for adjusting the tilt angle of the output mirror barrel.

[0009] Optionally, the crystal assembly includes: a crystal adjustment base; a TEC module connected to the crystal adjustment base; a crystal top cover connected to the TEC module; a crystal clamping base connected to the TEC module and located below the crystal top cover; and a TEC control board connected to the crystal adjustment base.

[0010] Optionally, the first adjustment unit and the second adjustment unit have the same structure. The first adjustment unit includes: an adjustment screw, which is threadedly connected to the first clamping adjustment seat in a three-point support manner; a first spring; and a fixing bolt, which passes through the first spring and is threadedly connected to the panel to elastically connect the first clamping adjustment seat to the panel. By turning the adjustment screw, its end abuts against and pushes the first clamping adjustment seat to overcome the preload of the spring, thereby adjusting the pitch and yaw angles of the front lens barrel.

[0011] Optionally, both the front mirror assembly and the output mirror assembly are provided with an adaptive sealing assembly. The adaptive sealing assembly includes: a hollow sealing ring disposed in a sealing groove between the first clamping adjustment seat and the panel; a driving unit disposed on the side of the first clamping adjustment seat and the panel facing the sealing cavity; and an inflation / deflation unit, one end of which is connected to the driving unit and the other end of which is connected to the hollow sealing ring. When the temperature inside the sealing cavity gradually increases, the driving unit drives the inflation / deflation unit to deflate the hollow sealing ring; when the temperature inside the sealing cavity recovers, the driving unit drives the inflation / deflation unit to inflate the hollow sealing ring.

[0012] Optionally, the drive unit includes: a first piston, slidably connected to a cylindrical cavity groove in the panel; and a piston rod, one end of which is connected to the first piston and the other end of which is drivenly connected to the inflation / deflation unit.

[0013] Optionally, the inflation / deflation unit includes: a cylinder disposed within the panel; a second piston slidably connected within the cylinder, with one end of the piston rod away from the first piston penetrating into the cylinder and connected to the second piston; a first air passage disposed within the panel, one end of the first air passage communicating with the end of the cylinder away from the first piston, and the other end of the first air passage extending out of the panel and facing the portion of the hollow sealing ring facing outwards; a second air passage disposed within the panel, one end of the second air passage communicating with the end of the cylinder near the first piston, and the other end of the second air passage communicating with the hollow sealing ring; and a second spring sleeved on the piston rod, with both ends of the spring abutting against the opposing surfaces of the first piston and the cylinder, respectively.

[0014] Optionally, the adaptive sealing assembly further includes a drying unit disposed inside the cylinder and communicating with the first air passage.

[0015] The beneficial effects of the airtight, multi-dimensional adjustable nonlinear transformation crystal device of the present invention are as follows: the outer shell assembly constitutes the main structure and sealing foundation of the device. The front mirror assembly and the output mirror assembly are respectively installed at both ends of the outer shell assembly by sealing methods (e.g., using O-rings or metal gaskets), together forming a sealed cavity. During assembly, the sealed cavity is evacuated and filled with dry nitrogen gas at a pressure higher than atmospheric pressure to form a positive pressure environment. The crystal assembly is installed and fixed in the sealed cavity, so that the positive pressure nitrogen environment can effectively prevent the intrusion of external humid air, providing protection for the crystal assembly. This fundamentally solves the problem of nonlinear crystals such as LBO and BBO failing due to deliquescence, and greatly extends the life of the entire laser system. Attached Figure Description

[0016] Figure 1 This is an exploded view of the nonlinear transformation crystal device for multi-dimensional adjustment of airtightness according to an embodiment of the present invention. Figure 2 This is an exploded view of the nonlinear transformation crystal device for multi-dimensional adjustment of airtightness according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the nonlinear transformation crystal device for multi-dimensional adjustment of airtightness according to an embodiment of the present invention, taken from one perspective. Figure 4 This is a schematic diagram of the nonlinear transformation crystal device for multi-dimensional adjustment of airtightness according to an embodiment of the present invention; Figure 5 This is a top view of the nonlinear transformation crystal device with multi-dimensional airtightness adjustment according to an embodiment of the present invention; Figure 6 for Figure 5 Sectional view along line AA in the middle; Figure 7 This is a schematic diagram of the adaptive sealing component in the nonlinear transformation crystal device for multi-dimensional adjustment of airtightness according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the adaptive sealing component in the nonlinear transformation crystal device for multi-dimensional adjustment of airtightness according to an embodiment of the present invention during operation. Figure 9 This is a schematic diagram of the arrangement of the first gas channel in the nonlinear transformation crystal device for multi-dimensional adjustment of airtightness according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Housing assembly; 11. L-shaped sealing plate; 12. Top sealing plate; 13. Housing; 14. Panel; 141. Cylindrical cavity; 142. First air passage; 2. Front lens assembly; 21. First clamping adjustment seat; 22. Front lens barrel; 23. First adjustment unit; 3. Output lens assembly; 31. Output lens barrel; 32. Second clamping adjustment seat; 33. Output lens; 34. Second adjustment unit; 4. Crystal assembly; 41. Crystal adjustment seat; 42. TEC module; 43. Crystal top cover; 44. Crystal clamping seat; 45. TEC electronic control board; 5. Adaptive sealing assembly; 51. Hollow sealing ring; 52. Drive unit; 53. Inflation / distension unit; 54. Drying unit. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0021] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0022] This invention provides a gas-tight, multi-dimensional adjustable nonlinear transformation crystal device, comprising: a housing assembly 1; a front mirror assembly 2, sealed to one end of the housing assembly 1; an output mirror assembly 3, sealed to the other end of the housing assembly 1, wherein the output mirror assembly 3 and the front mirror assembly 2 form a sealed cavity inside the housing assembly 1, the sealed cavity being filled with positive pressure nitrogen gas; and a crystal assembly 4 disposed within the sealed cavity.

[0023] In this optional embodiment, combined with Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the outer shell assembly 1 constitutes the main structure and sealing base of the device. The front mirror assembly 2 and the output mirror assembly 3 are respectively installed at both ends of the outer shell assembly 1 by sealing methods (such as using O-rings or metal gaskets), together forming a sealed cavity. During assembly, the sealed cavity is evacuated and filled with dry nitrogen gas at a pressure higher than atmospheric pressure to form a positive pressure environment. The crystal assembly 4 is installed and fixed in the sealed cavity, so that the positive pressure nitrogen environment can effectively prevent the intrusion of external humid air, providing protection for the crystal assembly 4. This fundamentally solves the problem of failure of nonlinear crystals such as LBO and BBO due to deliquescence, and greatly extends the life of the entire laser system.

[0024] Optionally, the outer casing assembly 1 includes: an L-shaped sealing plate 11; a top sealing plate 12 connected to the top of the L-shaped sealing plate 11; a housing 13 connected inside the L-shaped sealing plate 11; and a panel 14 connected to one side of the L-shaped sealing plate 11.

[0025] In this optional embodiment, combined with Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the specific configuration of the outer shell assembly 1 is assembled by connecting the L-shaped sealing plate 11, the top sealing plate 12, the shell 13 and the panel 14 with screws and sealing rings. The L-shaped sealing plate 11 serves as the main load-bearing structure and installation reference. The top sealing plate 12 is used to close the top of the shell 13 and can also serve as a wiring or water pipe connector. The shell 13 is the main enclosure structure that forms the sealed cavity. The panel 14 is used to install and support the front mirror assembly 2, thus forming a modular structure. The modular structure facilitates processing, assembly and maintenance, and ensures the overall rigidity and airtightness.

[0026] Furthermore, the front lens assembly 2 includes: a first clamping adjustment seat 21 connected to the panel 14; a front lens barrel 22 connected to the first clamping adjustment seat 21; and a first adjustment unit 23 disposed on the first clamping adjustment seat 21 for adjusting the tilt angle of the front lens barrel 22.

[0027] In this optional embodiment, combined with Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the front lens assembly 2 is mounted on the panel 14 via its first clamping adjustment seat 21. The front lens barrel 22 is used to clamp and protect the front lens (not shown in the figure, such as a 1064nm high-transmittance or high-reflection lens). The first adjustment unit 23 is integrated on the first clamping adjustment seat 21. By operating the first adjustment unit 23, the tilt angle of the first clamping adjustment seat 21 relative to the panel 14 can be precisely changed, thereby driving the front lens barrel 22 and its internal lens to make slight pitch and yaw adjustments. Moreover, the adjustment is carried out entirely outside the sealed cavity, which solves the problem of the contradiction between adjustment and sealing in traditional designs.

[0028] Optionally, the output mirror assembly 3 includes: an output mirror barrel 31; a second clamping adjustment seat 32, one side of which is connected to the output mirror barrel 31; an output mirror 33, which is connected to the other side of the second clamping adjustment seat 32; and a second adjustment unit 34, which is disposed on the second clamping adjustment seat 32 and is used to adjust the tilt angle of the output mirror barrel 31.

[0029] In this optional embodiment, the structure of the output mirror assembly 3 is similar to that of the front mirror assembly 2, but the function is different. The output mirror barrel 31 clamps the output mirror 33 (not shown in the figure, such as a 532nm high-lens lens). One side of the second clamping adjustment seat 32 is connected to the output mirror barrel 31, and the other side is connected to the housing 13 through the second adjustment unit 34. The second adjustment unit 34 is used to adjust the angle of the output mirror barrel 31. By adjusting the front mirror assembly 2 and the output mirror assembly 3 respectively, the efficiency of laser nonlinear transformation can be precisely controlled.

[0030] Furthermore, the crystal assembly 4 includes: a crystal adjustment base 41; a TEC module 42 connected to the crystal adjustment base 41; a crystal top cover 43 connected to the TEC module 42; a crystal clamping base 44 connected to the TEC module 42 and located below the crystal top cover 43; and a TEC control board 45 connected to the crystal adjustment base 41.

[0031] In this optional embodiment, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the crystal holder 44 is used to fix the nonlinear crystal (not shown in the figure, such as an LBO crystal), the TEC module 42 (thermoelectric cooler) is set close to the crystal to precisely control the crystal's operating temperature, the crystal cover 43 is used to press the crystal and ensure good thermal contact, the crystal adjustment seat 41 is used to install the entire crystal assembly 4, and the TEC control board 45 provides drive current to the TEC module 42 and receives feedback from the thermistor (not shown in the figure) to form a closed-loop temperature control, integrating temperature control and sealing into one unit, avoiding the crystal from being exposed to humid air during assembly and debugging.

[0032] Optionally, the first adjustment unit 23 and the second adjustment unit 34 have the same structure. The first adjustment unit 23 includes: an adjustment screw, which is threadedly connected to the first clamping adjustment seat 21 in a three-point support manner; a first spring; and a fixing bolt, which passes through the first spring and is threadedly connected to the panel 14 to elastically connect the first clamping adjustment seat 21 to the panel 14. By turning the adjustment screw, its end abuts against and pushes the first clamping adjustment seat 21 to overcome the preload of the spring, thereby adjusting the pitch and yaw angles of the front lens barrel 22.

[0033] In this optional embodiment, combined with Figure 1 As shown, since the first adjustment unit 23 and the second adjustment unit 34 have the same structure, only the installation method and working principle of the first adjustment unit 23 will be introduced below. The first adjustment unit 23 is a three-point adjustment mechanism. Three fixing bolts pass through the first spring and are screwed into the threaded holes of the panel 14 to press the first clamping adjustment seat 21. The first spring is in a compressed state, providing a continuous preload. Three adjustment screws are threadedly connected to the first clamping adjustment seat 21, and their ends press against the panel 14. When the angle needs to be adjusted, one or a pair of adjustment screws are screwed in with a tool. When screwed in, the adjustment screw will push the panel 14. Due to the reaction force, the first clamping adjustment seat 21 will overcome the force of the first spring and undergo a slight elastic deformation in the opposite direction, thereby changing the angle. The function of the first spring is to eliminate the thread gap, provide restoring force, and ensure a stable rigid connection in any adjustment position, avoiding optical path misalignment caused by vibration. This achieves precise, non-returning, and lockable optical adjustment outside the sealed cavity.

[0034] Furthermore, both the front mirror assembly 2 and the output mirror assembly 3 are provided with an adaptive sealing assembly 5. The adaptive sealing assembly 5 includes: a hollow sealing ring 51 disposed in a sealing groove between the first clamping adjustment seat 21 and the panel 14; a driving unit 52 disposed on the side of the first clamping adjustment seat 21 and the panel 14 facing the sealing cavity; and an inflation / deflation unit 53, one end of which is connected to the driving unit 52 and the other end of which is connected to the hollow sealing ring 51. When the temperature inside the sealing cavity gradually increases, the driving unit 52 drives the inflation / deflation unit 53 to deflate the hollow sealing ring 51; when the temperature inside the sealing cavity recovers, the driving unit 52 drives the inflation / deflation unit 53 to inflate the hollow sealing ring 51.

[0035] In this optional embodiment, combined with Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, since both the front mirror assembly 2 and the output mirror assembly 3 are equipped with adaptive sealing components 5, the following only describes the installation method and working principle of the adaptive sealing component 5 at the front mirror assembly 2. The hollow sealing ring 51 is placed in the sealing groove between the first clamping adjustment seat 21 and the panel 14. The drive unit 52 senses the pressure change in the sealing cavity (caused by temperature change). The inflation / deflation unit 53, as the actuator, is connected between the drive unit 52 and the hollow sealing ring 51. When the laser is working, the temperature in the sealing cavity rises, causing the pressure to increase. The drive unit 52 then activates, driving the inflation / deflation unit 53 to extract air from the hollow sealing ring 51 to relieve pressure, preventing excessive pressure from damaging the sealing ring or disrupting the sealing interface. When the laser stops working, the temperature drops, and the pressure recovers, the drive unit 52 reverses its operation, driving the inflation / deflation unit 53 to inflate the hollow sealing ring 51, restoring and maintaining its sealing pressure, compensating for any small gaps that may occur due to cooling. This allows the sealing performance to dynamically adapt to changes in the internal environment, significantly improving long-term reliability under thermal cycling conditions.

[0036] Furthermore, the drive unit 52 includes: a first piston, which is slidably connected to the cylindrical cavity 141 opened in the panel 14; and a piston rod, one end of which is connected to the first piston and the other end of which is drivenly connected to the inflation / deflation unit 53.

[0037] Optionally, the inflation / deflation unit 53 includes: a cylinder disposed within the panel 14; a second piston slidably connected within the cylinder, with one end of the piston rod away from the first piston penetrating into the cylinder and connected to the second piston; a first air passage 142 disposed within the panel 14, one end of the first air passage 142 communicating with the end of the cylinder away from the first piston, and the other end of the first air passage 142 extending out of the panel 14 and facing the outward portion of the hollow sealing ring 51; a second air passage disposed within the panel 14, one end of the second air passage communicating with the end of the cylinder near the first piston, and the other end of the second air passage communicating with the hollow sealing ring 51; and a second spring sleeved on the piston rod, with both ends of the spring abutting against the opposing surfaces of the first piston and the cylinder, respectively.

[0038] In this optional embodiment, combined with Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, with Figure 7For example, the left cylinder of the second piston is set as the upper chamber, and the left cylinder of the second piston is set as the lower chamber. When the temperature and pressure inside the sealing chamber increase, the high-pressure gas inside the sealing chamber acts on the first piston of the drive unit 52, generating a downward thrust. This thrust overcomes the preload of the spring and pushes the piston rod and the second piston downward. When the second piston moves downward, the volume of the upper chamber of the cylinder increases and the internal pressure decreases, forming a negative pressure. Thus, through the second air passage, air is drawn from inside the hollow sealing ring 51, reducing its internal pressure and shrinking its volume to achieve pressure relief and prevent it from being damaged due to excessive expansion caused by the external high-pressure environment. At the same time, the second piston moves downward to compress the gas in the lower chamber of the cylinder and discharges it outward through the first air passage 142. The discharged airflow blows towards the outer periphery of the hollow sealing ring 51. The two airflows collide and form an air curtain, which disperses the water vapor near the hollow sealing ring 51. When the temperature inside the sealed cavity decreases, or the pressure recovers or decreases: the gas pressure acting on the first piston decreases, and the spring's restoring force pushes the first and second pistons upward. When the second piston moves upward, it compresses the gas in the upper chamber of the cylinder and re-presses it into the hollow sealing ring 51 through the second air passage, inflating it and restoring the clamping force required for sealing. At the same time, the upward movement of the second piston causes the volume of the lower chamber of the cylinder to increase and the internal pressure to decrease, compensating for possible leakage gaps caused by temperature changes. Gas is then drawn in from outside the device through the first air passage 142 to prepare for the next cycle.

[0039] Optionally, the adaptive sealing assembly 5 further includes a drying unit 54, which is disposed inside the cylinder and communicates with the first air passage 142.

[0040] In this optional embodiment, in order to prevent trace amounts of water vapor from being carried in during the inhalation process, a drying unit 54 is provided. The drying unit 54 can be a small module built into the path of the first airway 142, which is filled with a high-performance molecular sieve desiccant. Any gas flowing through the first airway 142 (whether blown out or inhaled) will be dried. When the lower chamber of the cylinder is vented (high temperature and high pressure conditions): the vented gas flows through the drying unit 54. Even if the gas may carry trace amounts of water vapor in the cylinder, it will be dried before being vented, ensuring that the air curtain blown towards the outer periphery of the hollow sealing ring 51 is dry, greatly improving its effect of blocking water vapor. When the lower chamber of the cylinder draws in air (low temperature and low pressure conditions): external gas is drawn in and flows through the drying unit 54, where the water vapor is adsorbed by the desiccant, ensuring that the gas entering the upper chamber for the next cycle is dry.

[0041] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A hermetically sealed, multi-dimensionally adjustable nonlinear transformation crystal device, characterized in that, include: Housing assembly (1); The front mirror assembly (2) is sealed to one end of the housing assembly (1); The output mirror assembly (3) is sealed to the other end of the housing assembly (1). The output mirror assembly (3) and the front mirror assembly (2) form a sealed cavity inside the housing assembly (1). The sealed cavity is filled with positive pressure nitrogen. The crystal assembly (4) is located inside the sealed cavity.

2. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 1, characterized in that, The housing assembly (1) includes: L-shaped sealing plate (11); Top sealing plate (12) is connected to the top of the L-shaped sealing plate (11); The housing (13) is connected inside the L-shaped sealing plate (11); Panel (14) is attached to one side of the L-shaped sealing plate (11).

3. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 2, characterized in that, The front mirror assembly (2) includes: The first clamping adjustment seat (21) is connected to the panel (14); The front lens barrel (22) is connected to the first clamping adjustment seat (21); The first adjustment unit (23) is disposed on the first clamping adjustment seat (21) and is used to adjust the tilt angle of the front lens barrel (22).

4. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 3, characterized in that, The output mirror assembly (3) includes: Output lens tube (31); The second clamping adjustment seat (32) is connected to the output lens tube (31) on one side; The output mirror (33) is connected to the other side of the second clamping adjustment seat (32); The second adjustment unit (34) is located on the second clamping adjustment seat (32) and is used to adjust the tilt angle of the output lens barrel (31).

5. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 4, characterized in that, The crystal assembly (4) includes: Crystal adjustment seat (41); The TEC module (42) is connected to the crystal adjustment base (41); The crystal cover (43) is connected to the TEC module (42); A crystal holder (44) is connected to the TEC module (42) and located below the crystal cover (43); The TEC control board (45) is connected to the crystal adjustment base (41).

6. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 5, characterized in that, The first adjustment unit (23) has the same structure as the second adjustment unit (34), and the first adjustment unit (23) includes: The adjusting screw is threadedly connected to the first clamping adjusting seat (21) in a three-point support manner; First spring; A fixing bolt passes through the first spring and is threaded onto the panel (14) to elastically connect the first clamping adjustment seat (21) to the panel (14); In this process, by turning the adjusting screw, its end abuts against and pushes the first clamping adjusting seat (21), overcoming the preload of the spring, so as to adjust the pitch and yaw angle of the front lens barrel (22).

7. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 3, characterized in that, Both the front mirror assembly (2) and the output mirror assembly (3) are provided with an adaptive sealing assembly (5), the adaptive sealing assembly (5) comprising: A hollow sealing ring (51) is disposed in the sealing groove between the first clamping adjustment seat (21) and the panel (14); A drive unit (52) is provided on the side of the first clamping adjustment seat (21) and the panel (14) facing the sealing cavity; The inflation / deflation unit (53) is connected at one end to the drive unit (52) and at the other end to the hollow sealing ring (51); When the temperature inside the sealed cavity gradually increases, the driving unit (52) drives the inflation / deflation unit (53) to deflate the hollow sealing ring (51); when the temperature inside the sealed cavity recovers, the driving unit (52) drives the inflation / deflation unit (53) to inflate the hollow sealing ring (51).

8. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 7, characterized in that, The drive unit (52) includes: The first piston is slidably connected in the cylindrical cavity (141) opened in the panel (14); The piston rod is connected at one end to the first piston and at the other end to the inflation / deflation unit (53).

9. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 8, characterized in that, The inflation / deflation unit (53) includes: The cylinder is located inside the panel (14); The second piston is slidably connected inside the cylinder, and the end of the piston rod away from the first piston passes into the cylinder and is connected to the second piston. A first air passage (142) is provided inside the panel (14). One end of the first air passage (142) is connected to the end of the cylinder away from the first piston, and the other end of the first air passage (142) extends out of the panel (14) and faces the portion of the hollow sealing ring (51) facing outward. The second air passage is located inside the panel (14). One end of the second air passage is connected to the end of the cylinder near the first piston, and the other end of the second air passage is connected to the hollow sealing ring (51). The second spring is sleeved on the piston rod, and the two ends of the spring abut against the opposite surfaces of the first piston and the cylinder, respectively.

10. The airtight, multi-dimensional adjustable nonlinear transformation crystal device as described in claim 9, characterized in that, The adaptive sealing assembly (5) further includes a drying unit (54), which is located inside the cylinder and is connected to the first air passage (142).

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