A three-path common optical path spectroscope prism shock absorption optical system device

Abstract

The present application belongs to the technical field of precision optical instrument, especially to a three-way common optical path beam splitting prism shock absorption optical system device, aiming at the problems of poor prism shock absorption effect, difficulty in effectively removing moisture and pollutants in the shell, and difficulty in cleaning and maintaining the front optical element in the existing three-way common optical path beam splitting prism optical system device during use, the present application proposes the following scheme, which comprises a shell and a lens barrel, the lens barrel is fixedly communicated with the shell, a fixing sleeve is fixedly installed on the outer side of the lens barrel, and a front collimating mirror group is installed in the lens barrel; the present application realizes multi-dimensional shock absorption of the beam splitting prism group through the connecting column and the high-damping rubber pad, circulates and purifies the inside of the shell by using the air exchange mechanism, and drives the cleaning sponge to perform online self-cleaning on the front collimating mirror group during air exchange through the bevel gear transmission, so that the three functions synergistically work together to effectively improve the vibration stability, environmental adaptability and maintenance convenience of the system.

Description

Technical Field

[0001] This invention relates to the field of precision optical instrument technology, and in particular to a three-way common-path beam splitter prism vibration reduction optical system device. Background Technology

[0002] Three-way common-path beam splitting prism systems, capable of splitting a single incident beam into three parallel output beams with equal or unequal energy according to a preset ratio, have broad application prospects in fields such as Fourier transform spectrometers, coherent lidar, three-channel fluorescence detection, and optical coherence tomography. The core optical component of this type of system is a beam splitting prism group consisting of three prisms arranged sequentially along the same optical axis. Micrometer-precision air gaps are provided between adjacent prisms, and multilayer dielectric beam splitting films with specific splitting ratios are deposited on adjacent prism surfaces. However, the existing three-way common-path beam splitter optical system still has the following technical defects in use: First, the prisms in a beam splitter assembly are typically fixed directly to the inner wall of the housing via rigid connectors. When the system is subjected to external mechanical vibration or impact, the vibration energy is directly transmitted to each prism through the rigid mounting path, which can easily cause a slight shift in the relative position between the prisms. This, in turn, causes the optical axis pointing of the three outgoing beams to drift and the splitting ratio to fluctuate, severely affecting the measurement accuracy and stability of the system. Although some existing technologies attempt to place damping elements such as rubber pads on the outside of the prisms, rubber pads can only provide passive damping in one direction. Their attenuation effect on coupled vibrations from multiple directions (such as random vibrations and impact vibrations) is limited. Furthermore, rubber pads suffer from aging and hardening after long-term use, and their damping performance gradually degrades. Secondly, beam splitter prisms are typically encapsulated in a sealed housing, with the air gaps inside the housing directly exposed to the enclosed environment. During prolonged system operation or switching between different temperature and humidity environments, residual moisture inside the housing, along with water and volatile organic compounds slowly released from the sealing material, accumulates within the housing. Water vapor molecules can diffuse into the micro- and nano-pores of the beam splitter film, altering its effective refractive index and causing hydrolysis and delamination, leading to a deviation in the splitting ratio from the design value and irreversible performance degradation. Simultaneously, the refractive index changes in the air gaps caused by moisture further affect the phase accuracy of interferometry measurements. Furthermore, dust particles suspended in the air inside the housing, once adhering to the prism's optical surface, will cause scattering losses and light energy attenuation, affecting the energy consistency of the three beams. Third, the ventilation and maintenance operations of existing sealed housings are relatively cumbersome. When dehumidification, purification, or gas replacement is required inside the housing, it is usually necessary to disassemble the housing or use an external air source device for purging. The operation process is complex and can easily introduce new contaminants. Although some solutions are equipped with ventilation interfaces, the original gas inside the housing is directly discharged into the external environment during ventilation, which cannot form an effective circulation and purification, resulting in low ventilation efficiency. At the same time, it is difficult to accurately control the air pressure balance inside the sealed housing during ventilation, which can easily have an adverse effect on optical components due to excessive pressure difference between the inside and outside. Fourth, as an important optical component in the incident light path, the front collimating lens assembly is prone to accumulating dust and contaminants on its optical surface during long-term use, leading to decreased transmittance and degraded beam quality. Existing front collimating lens assemblies typically require periodic disassembly for manual cleaning. This cleaning operation is not only time-consuming and labor-intensive, but repeated disassembly and reassembly also affects the optical axis alignment accuracy of the lens assembly, and the readjustment process is complex.

[0003] In the existing technology, the three-way common-path beam splitter prism optical system has problems such as poor prism vibration reduction effect, difficulty in effectively removing moisture and contaminants inside the housing, and difficulty in cleaning and maintaining the front optical components. To address these problems, we propose a three-way common-path beam splitter prism vibration reduction optical system. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing three-way common-path beam-splitting prism optical systems, such as poor prism vibration damping, difficulty in effectively removing moisture and contaminants from the housing, and difficulty in cleaning and maintaining the front optical components. Therefore, this invention proposes a three-way common-path beam-splitting prism vibration damping optical system.

[0005] The three-way common-path beam-splitting prism vibration reduction optical system device provided in this application adopts the following technical solution: A three-way common-path beam splitter prism vibration reduction optical system device includes a housing and a lens barrel. The lens barrel is fixedly connected to the housing. A fixing sleeve is fixedly installed on the outside of the lens barrel. A front collimating lens group is installed inside the lens barrel. The beam splitter prism assembly has multiple connecting posts fixedly installed at the bottom and top. One end of each connecting post is fixedly connected to the inner wall of the top and bottom of the housing, respectively. Two high-damping rubber pads are fixedly connected to the outside of the beam splitter prism assembly. The two high-damping rubber pads are fixedly installed on the inner walls of the two sides of the housing, respectively. The first light-transmitting window, the second light-transmitting window, and the third light-transmitting window are fixedly connected to the outside of the housing; A sealing seat is installed on one side of the lens barrel. The sealing seat has an installation groove, and a ventilation mechanism is installed in the installation groove to ventilate the inside of the housing.

[0006] Furthermore, ceramic heating elements are fixedly installed on both sides of the inner wall of the mounting groove, and an air intake channel is opened on the bottom inner wall of the mounting groove, with a filter screen fixedly installed inside the air intake channel.

[0007] Furthermore, a through hole is provided on one side of the inner wall of the mounting groove, and a transmission rod is rotatably installed in the through hole. A second bevel gear and a first bevel gear are fixedly installed on one end of the transmission rod and the outside of the transmission shaft, respectively. The second bevel gear and the first bevel gear mesh with each other. When the transmission shaft rotates, the first bevel gear drives the second bevel gear to rotate.

[0008] Furthermore, a connecting rod is fixedly installed at the other end of the rectangular rod, and a cleaning sponge is fixedly connected to the outside of the connecting rod. The cleaning sponge cooperates with the front collimating lens assembly. When the rectangular rod rotates, the connecting rod drives the cleaning sponge to rotate.

[0009] Furthermore, a sliding hole is provided on one side of the inner wall of the annular threaded groove, and a guide rod is slidably installed in the sliding hole. A plug is fixedly connected to one end of the guide rod. An air outlet is provided on one side of the housing, and the plug is slidably installed in the air outlet. One end of the guide rod is engaged with a threaded sleeve. When the threaded sleeve rotates to a certain position, the threaded sleeve squeezes the guide rod to move horizontally.

[0010] Furthermore, a connecting block is fixedly installed on the outer side of the guide rod, and a second spring is sleeved on the outer side of the guide rod. The two ends of the second spring are fixedly connected to the outer side of the connecting block and the outer side of the annular seat, respectively.

[0011] Furthermore, an annular seat is fixedly installed on the outer side of the lens barrel, and an annular threaded groove is opened on one side of the annular seat. A threaded sleeve is rotatably installed in the annular threaded groove. The threaded sleeve is fixedly installed on the outer side of the sealing seat. When the threaded sleeve is rotated, the sealing seat can be disassembled and assembled.

[0012] Furthermore, a rectangular groove is provided at one end of the transmission rod, and a rectangular rod is slidably installed in the rectangular groove. A first spring is fixedly connected to one end of the rectangular rod, and one end of the first spring is fixedly connected to the inner wall of one side of the rectangular groove. When the transmission rod rotates, the transmission rod drives the rectangular rod to rotate through the rectangular groove.

[0013] Furthermore, the sealing seat has an air outlet channel that communicates with the mounting groove, and the lens barrel has a connecting channel that cooperates with the air outlet channel and communicates with the housing.

[0014] Furthermore, the ventilation mechanism includes a mounting plate, which is fixedly installed in the mounting groove. A drive motor is fixedly installed at the bottom of the mounting plate, and a transmission shaft is rotatably installed on the mounting plate. One end of the transmission shaft is fixedly connected to the output shaft of the drive motor, and an impeller is fixedly connected to the outside of the transmission shaft. When the drive motor is turned on, the transmission shaft drives the impeller to rotate.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. This solution achieves elastic support connection by setting connecting columns at the top and bottom of the beam splitter prism assembly. At the same time, high-damping rubber pads are fixedly installed on both sides of the beam splitter prism assembly. The connecting columns provide axial flexible support, and the high-damping rubber pads provide radial vibration attenuation. The two work together to achieve multi-dimensional vibration reduction protection for the beam splitter prism assembly, effectively suppressing the transmission of external vibrations to the prisms in different directions, ensuring the long-term stability of the relative positions between the prisms, and thus ensuring the optical axis pointing accuracy and splitting ratio stability of the three output beams. 2. This solution uses a ventilation mechanism installed in the sealed seat. The impeller is driven by a drive motor to rotate and introduce external air into the housing after it is filtered by a filter screen. At the same time, the original gas in the housing is discharged through the air outlet. This achieves active replacement and circulation purification of the gas inside the housing. It can effectively remove the moisture and volatile organic compounds accumulated inside the housing, maintain a dry and clean optical environment inside the housing, and prevent the spectrophotometer layer from getting damp and degrading and the optical surface from being contaminated. 3. This solution uses a first bevel gear on the transmission shaft of the ventilation mechanism to mesh with a second bevel gear on the transmission rod. When the drive motor is running to perform ventilation, the transmission rod synchronously drives the rectangular rod and the connecting rod to rotate, thereby driving the cleaning sponge to wipe and clean the optical surface of the front collimating lens group. This achieves online self-cleaning of the front collimating lens group during ventilation, and the lens can be maintained without disassembling the lens barrel. This avoids the impact of repeated disassembly on the optical axis alignment accuracy and significantly reduces maintenance difficulty and labor costs.

[0016] This invention achieves multi-dimensional vibration reduction of the beam splitter prism assembly through connecting columns and high-damping rubber pads, and uses a ventilation mechanism to circulate and purify the interior of the housing. At the same time, a cleaning sponge driven by bevel gear transmission performs online self-cleaning of the front collimating lens assembly during ventilation. The three functions work together to effectively improve the vibration stability, environmental adaptability and maintenance convenience of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front view of a three-way common-path beam-splitting prism vibration reduction optical system device proposed in this invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of the housing of a three-way common-path beam splitter prism vibration reduction optical system device proposed in this invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the sealing seat of a three-way common-path beam splitter vibration reduction optical system device proposed in this invention.

[0020] Figure 4This is a schematic diagram of the lens barrel of a three-way common-path beam-splitting prism vibration reduction optical system device proposed in this invention.

[0021] Figure 5 This is a schematic diagram of the guide rod of a three-way common-path beam splitter prism vibration reduction optical system device proposed in this invention.

[0022] Figure 6 This is a schematic diagram of the structure of the annular seat and threaded sleeve of a three-way common-path beam splitter vibration reduction optical system device proposed in this invention.

[0023] Figure 7 This invention proposes a three-way common-path beam splitter prism vibration reduction optical system device. Figure 3 An enlarged structural diagram of part A in the middle.

[0024] Figure 8 This invention proposes a three-way common-path beam splitter prism vibration reduction optical system device. Figure 3 Enlarged structural diagram of part B.

[0025] Reference numerals: 1. Housing; 2. Fixing sleeve; 3. Lens tube; 4. Sealing seat; 5. Annular seat; 6. Threaded sleeve; 7. Front collimating lens assembly; 8. Beam splitter prism assembly; 9. Connecting column; 10. High-damping rubber pad; 11. First light-transmitting window; 12. Second light-transmitting window; 13. Third light-transmitting window; 14. Air outlet; 15. Mounting groove; 16. Mounting plate; 17. Drive motor; 18. Transmission shaft; 19. Impeller; 20. Ceramic heating element; 21. Air outlet channel; 22. Air inlet channel; 23. Filter screen; 24. First bevel gear; 25. Second bevel gear; 26. Transmission rod; 27. Rectangular groove; 28. First spring; 29. ​​Rectangular rod; 30. Connecting rod; 31. Cleaning sponge; 32. Guide rod; 33. Connecting block; 34. Second spring; 35. Plug; 36. Annular threaded groove. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Example 1

[0028] Reference Figures 1-8 A three-way common beam splitter prism vibration reduction optical system device includes a housing 1 and a lens barrel 3. The lens barrel 3 is fixedly connected to the housing 1. A fixing sleeve 2 is fixedly installed on the outside of the lens barrel 3. A front collimating lens group 7 is installed inside the lens barrel 3. The beam splitter prism group 8 has multiple connecting posts 9 fixedly installed at its bottom and top. One end of each connecting post 9 is fixedly connected to the inner wall of the top and bottom of the housing 1, respectively. Two high-damping rubber pads 10 are fixedly connected to the outer side of the beam splitter prism group 8. The two high-damping rubber pads 10 are fixedly installed on the inner walls of the two sides of the housing 1, respectively. The first light-transmitting window 11, the second light-transmitting window 12, and the third light-transmitting window 13 are fixedly connected to the outside of the housing 1. The sealing seat 4 is installed on one side of the lens barrel 3. The sealing seat 4 has an installation groove 15 inside, and an air exchange mechanism is provided in the installation groove 15. The air exchange mechanism is used to perform air exchange treatment on the inside of the housing 1.

[0029] In this embodiment, a through hole is provided on one side of the inner wall of the mounting groove 15. A transmission rod 26 is rotatably installed in the through hole. A second bevel gear 25 and a first bevel gear 24 are respectively fixedly installed on the outer side of the transmission shaft 18 at one end of the transmission rod 26. The second bevel gear 25 and the first bevel gear 24 mesh with each other. When the transmission shaft 18 rotates, the first bevel gear 24 drives the second bevel gear 25 to rotate. A sliding hole is provided on one side of the inner wall of the annular threaded groove 36. A guide rod 32 is slidably installed in the sliding hole. A plug 35 is fixedly connected to one end of the guide rod 32. An air outlet 14 is provided on one side of the housing 1. The plug 35 is slidably installed in the air outlet 14. One end of the guide rod 32 is engaged with the threaded sleeve 6. When the threaded sleeve 6 rotates to a certain position, the threaded sleeve 6 presses the guide rod 32 to move horizontally. An annular seat 5 is fixedly installed on the outside of the lens barrel 3. An annular threaded groove 36 is opened on one side of the annular seat 5. The threaded sleeve 6 is rotatably installed in the annular threaded groove 36. The threaded sleeve 6 is fixedly installed on the outside of the sealing seat 4. When the threaded sleeve 6 is rotated, the sealing seat 4 can be disassembled and assembled. An air outlet channel 21 is opened in the sealing seat 4. The air outlet channel 21 communicates with the mounting groove 15. A connecting channel is opened in the lens barrel 3. The connecting channel is engaged with the air outlet channel 21. The connecting channel communicates with the housing 1.

[0030] In this embodiment, ceramic heating elements 20 are fixedly installed on both inner walls of the mounting groove 15. An air intake channel 22 is provided on the bottom inner wall of the mounting groove 15, and a filter screen 23 is fixedly installed in the air intake channel 22. A connecting rod 30 is fixedly installed on the other end of the rectangular rod 29. A cleaning sponge 31 is fixedly connected to the outside of the connecting rod 30. The cleaning sponge 31 cooperates with the front collimating lens assembly 7. When the rectangular rod 29 rotates, the connecting rod 30 drives the cleaning sponge 31 to rotate. A connecting block 33 is fixedly installed on the outside of the guide rod 32. A second spring 34 is sleeved on the outside of the guide rod 32. The two ends of the second spring 34 are fixedly connected to the outside of the connecting block 33 and the outside of the annular seat 5, respectively. A rectangular rod 26 is provided on one end. A rectangular groove 27 is provided, in which a rectangular rod 29 is slidably installed. One end of the rectangular rod 29 is fixedly connected to a first spring 28, and one end of the first spring 28 is fixedly connected to the inner wall of one side of the rectangular groove 27. When the transmission rod 26 rotates, the transmission rod 26 drives the rectangular rod 29 to rotate through the rectangular groove 27. The ventilation mechanism includes a mounting plate 16, which is fixedly installed in the mounting groove 15. A drive motor 17 is fixedly installed at the bottom of the mounting plate 16, and a transmission shaft 18 is rotatably installed on the mounting plate 16. One end of the transmission shaft 18 is fixedly connected to the output shaft of the drive motor 17, and an impeller 19 is fixedly connected to the outside of the transmission shaft 18. When the drive motor 17 is turned on, the transmission shaft 18 drives the impeller 19 to rotate.

[0031] The implementation principle in this embodiment is as follows: In the initial state of use, the sealing seat 4 is fixedly installed on one side of the lens barrel 3 through the threaded sleeve 6 and the annular thread groove 36 of the annular seat 5. When the threaded sleeve 6 is tightened, the sealing seat 4 and the lens barrel 3 are tightly fitted. At this time, the end of the threaded sleeve 6 touches the guide rod 32, and the plug 35 is pushed to the open position under the action of the guide rod 32. The guide rod 32 is squeezed by the threaded sleeve 6 and moves away from the housing 1, causing the plug 35 to slide out from the air outlet 14, so that the air outlet 14 is in the open state, and the inside of the housing 1 is connected to the external environment through the air outlet 14. When it is necessary to dehumidify and purify the interior of the housing 1, the drive motor 17 is turned on. The output shaft of the drive motor 17 drives the transmission shaft 18 to rotate. The transmission shaft 18 drives the impeller 19 to rotate at high speed. At the same time, the transmission shaft 18 drives the transmission rod 26 to rotate through the meshing of the first bevel gear 24 and the second bevel gear 25. The impeller 19 rotates to generate suction. External air enters the mounting slot 15 through the air intake channel 22. The filter 23 installed in the air intake channel 22 filters the external air and removes dust particles. The air entering the mounting slot 15 is heated and dried by the ceramic heating element 20. Then, it enters the housing 1 through the air outlet channel 21 and the connecting channel in the mirror tube 3. The dry hot air flows inside the housing 1, replacing and drying the gas inside the housing 1. After carrying away the moisture and volatile organic compounds accumulated inside the housing 1, it is discharged from the air outlet 14 opened on one side of the housing 1, realizing active ventilation and purification of the internal environment of the housing 1. Meanwhile, the transmission rod 26 drives the rectangular rod 29 to rotate through the rectangular groove 27, and the rectangular rod 29 drives the connecting rod 30 to rotate. The cleaning sponge 31 on the outside of the connecting rod 30 rotates synchronously with the connecting rod 30, and rotates to wipe the optical surface of the front collimating lens group 7 to remove dust and contaminants attached to the surface of the front collimating lens group 7. The rectangular rod 29 can slide axially in the rectangular groove 27. The first spring 28 applies elastic force to the rectangular rod 29 so that the cleaning sponge 31 always maintains appropriate contact pressure with the front collimating lens group 7, ensuring the cleaning effect while avoiding excessive pressure that could damage the lens surface. After the ventilation and purification operation is completed, the drive motor 17 is turned off, the impeller 19 stops rotating, the transmission rod 26 stops rotating, and the cleaning sponge 31 stops wiping and stays in its current position. At this time, the inside of the housing 1 is a dry and clean environment after the ventilation treatment. When it is necessary to disassemble the sealing seat 4 for maintenance or replace the filter screen 23, rotate the threaded sleeve 6 to make the threaded sleeve 6 exit from the annular thread groove 36. During the process of loosening the threaded sleeve 6, the end of the threaded sleeve 6 moves away from the guide rod 32. The second spring 34 drives the connecting block 33 and the guide rod 32 to reset through the deformation force. The guide rod 32 drives the plug 35 to move synchronously, so that the plug 35 gradually slides into the air outlet 14 and closes the air outlet 14, preventing external pollutants from entering the housing 1 through the air outlet 14 during the disassembly of the sealing seat 4. When the threaded sleeve 6 is completely loosened, the sealing seat 4 can be removed from one side of the lens barrel 3. At this time, the plug 35 remains closed to the air outlet 14 under the push of the guide rod 32, and the inside of the housing 1 remains closed. When the sealing seat 4 is reinstalled, the threaded sleeve 6 is screwed into the annular thread groove 36. The threaded sleeve 6 gradually moves away from the guide rod 32. Under the action of the reset force of the second spring 34, the guide rod 32 moves away from the housing 1, causing the plug 35 to slide out of the air outlet 14. The air outlet 14 reopens, and the inside of the housing 1 returns to normal ventilation. During operation, the connecting columns 9 at the top and bottom of the beam splitter prism assembly 8 provide axial elastic support, absorbing and attenuating vibrations transmitted from the vertical direction of the housing 1; the high-damping rubber pads 10 on both sides absorb and attenuate vibrations transmitted from the horizontal direction of the housing 1. The connecting columns 9 and the high-damping rubber pads 10 form a multi-dimensional elastic constraint on the beam splitter prism assembly 8 from four directions, cutting off the rigid connection path between the beam splitter prism assembly 8 and the housing 1, effectively suppressing the interference of external vibrations on the relative positions of each prism in the beam splitter prism assembly 8.

[0032] Example 2

[0033] The difference between this embodiment and Embodiment 1 is that the connecting column 9 is composed of a composite structure of silicone rubber and a metal core. The metal core is located at the central axis of the connecting column 9, and the silicone rubber covers the outside of the metal core. The metal core provides axial connection strength, and the silicone rubber provides elastic deformation capability. The composite structure ensures both connection reliability and excellent damping and shock absorption performance. The axial stiffness of the connecting column 9 is 50 N / mm to 200 N / mm, and the damping ratio is 0.15 to 0.30.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A three-way common-path beam-splitting prism vibration reduction optical system device, characterized in that: include: The shell (1) and the lens tube (3) are fixedly connected to the shell (1). A fixing sleeve (2) is fixedly installed on the outside of the lens tube (3). A front collimating lens group (7) is installed inside the lens tube (3). The beam splitter prism assembly (8) has multiple connecting posts (9) fixedly installed at the bottom and top of the beam splitter prism assembly (8). One end of the multiple connecting posts (9) is fixedly connected to the inner wall of the top and the inner wall of the bottom of the housing (1), respectively. Two high-damping rubber pads (10) are fixedly connected to the outside of the beam splitter prism assembly (8). The two high-damping rubber pads (10) are fixedly installed on the inner walls of the two sides of the housing (1), respectively. The first light-transmitting window (11), the second light-transmitting window (12), and the third light-transmitting window (13) are fixedly connected to the outside of the housing (1); A sealing seat (4) is installed on one side of the lens barrel (3). A mounting groove (15) is provided in the sealing seat (4). A ventilation mechanism is provided in the mounting groove (15). The ventilation mechanism is used to ventilate the inside of the housing (1).

2. The three-way common-path beam splitter vibration reduction optical system device according to claim 1, characterized in that: The ventilation mechanism includes a mounting plate (16), which is fixedly installed in the mounting groove (15). A drive motor (17) is fixedly installed at the bottom of the mounting plate (16), and a transmission shaft (18) is rotatably installed on the mounting plate (16). One end of the transmission shaft (18) is fixedly connected to the output shaft of the drive motor (17), and an impeller (19) is fixedly connected to the outside of the transmission shaft (18).

3. The three-way common-path beam splitter vibration reduction optical system device according to claim 2, characterized in that: Ceramic heating elements (20) are fixedly installed on both sides of the inner wall of the mounting groove (15). An air intake channel (22) is opened on the bottom inner wall of the mounting groove (15), and a filter screen (23) is fixedly installed in the air intake channel (22).

4. The three-way common-path beam splitter vibration reduction optical system device according to claim 3, characterized in that: The sealing seat (4) has an air outlet channel (21) which is connected to the mounting groove (15). The lens barrel (3) has a connecting channel which is matched with the air outlet channel (21) and is connected to the housing (1).

5. The three-way common-path beam splitter vibration reduction optical system device according to claim 4, characterized in that: A through hole is provided on one side of the inner wall of the mounting groove (15), and a transmission rod (26) is rotatably installed in the through hole. A second bevel gear (25) and a first bevel gear (24) are fixedly installed on one end of the transmission rod (26) and the outside of the transmission shaft (18), respectively. The second bevel gear (25) and the first bevel gear (24) mesh with each other.

6. The three-way common-path beam splitter vibration reduction optical system device according to claim 5, characterized in that: A rectangular groove (27) is provided at one end of the transmission rod (26), and a rectangular rod (29) is slidably installed in the rectangular groove (27). A first spring (28) is fixedly connected to one end of the rectangular rod (29), and one end of the first spring (28) is fixedly connected to the inner wall of one side of the rectangular groove (27).

7. The three-way common-path beam splitter vibration reduction optical system device according to claim 6, characterized in that: A connecting rod (30) is fixedly installed at the other end of the rectangular rod (29). A cleaning sponge (31) is fixedly connected to the outside of the connecting rod (30). The cleaning sponge (31) cooperates with the front collimating lens group (7).

8. The three-way common-path beam splitter vibration reduction optical system device according to claim 7, characterized in that: An annular seat (5) is fixedly installed on the outer side of the lens tube (3). An annular threaded groove (36) is opened on one side of the annular seat (5). A threaded sleeve (6) is rotatably installed in the annular threaded groove (36). The outer side of the sealing seat (4) is fixedly installed on the threaded sleeve (6).

9. The three-way common-path beam splitter vibration reduction optical system device according to claim 8, characterized in that: A sliding hole is provided on one side of the inner wall of the annular threaded groove (36), and a guide rod (32) is slidably installed in the sliding hole. A plug (35) is fixedly connected to one end of the guide rod (32). An air outlet (14) is provided on one side of the housing (1), and the plug (35) is slidably installed in the air outlet (14). One end of the guide rod (32) is engaged with the threaded sleeve (6).

10. The three-way common-path beam splitter vibration reduction optical system device according to claim 9, characterized in that: A connecting block (33) is fixedly installed on the outside of the guide rod (32), and a second spring (34) is sleeved on the outside of the guide rod (32). The two ends of the second spring (34) are fixedly connected to the outside of the connecting block (33) and the outside of the ring seat (5), respectively.

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