Light path offset correction device for polarization interferometer
By designing an optical path offset correction device for a polarization interferometer, including a rotating mechanism, a linear telescopic mechanism, a frame mechanism and a linear bearing assembly, the problem of manual adjustment of the optical path in the prior art is solved, and automatic compensation and correction of the optical path is realized, efficiency is improved and cost is reduced.
Patent Information
- Application Number
- CN202520019930.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2035-01-06
AI Technical Summary
In the prior art, the optical path of the polarization interferometer needs to be manually adjusted, which is inefficient and is susceptible to environmental factors, and it is impossible to achieve automatic adjustment in complex electromagnetic radiation environments.
An optical path offset correction device including a rotating mechanism, a linear telescopic mechanism, a mirror frame mechanism and a linear bearing assembly is designed, and automatic compensation and correction of the optical path is achieved through the cooperation of the mechanical structure.
It realizes automatic compensation and correction of the optical path through its own structure without the participation of manual labor, and the error can reach the rad order, which improves work efficiency and reduces labor costs.
Smart Images
Figure CN222580326U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plasma equipment, in particular to an optical path deviation correction device for a polarization interferometer. Background Art
[0002] In fusion research, the polarization interferometer diagnostic system is one of the necessary diagnostic systems for plasma parameter monitoring. Since the polarization interferometer system laser is sensitive to the complex electromagnetic environment inside the device hall, it needs to be placed at a certain distance from the device hall, which requires the light to propagate through a waveguide structure.
[0003] At present, large domestic devices mainly use a 45° lens directly installed at the waveguide transition to transmit the laser of the polarization interferometer. Certain factors may cause the optical path to deviate, and manual adjustment of the optical path is required. However, manual intervention is required, and the efficiency is low and the automation is insufficient. Specifically, the light alignment work needs to be done manually, which increases the time cost and labor cost. Due to the reliance on manual operation, the response time is longer than that of automatic adjustment, which affects the work efficiency. At the same time, manual operation is easily affected by some factors and causes certain errors.
[0004] At the same time, in future burning plasma devices, plasma discharge will be accompanied by more complex electromagnetic radiation and ray radiation, which does not provide the conditions for artificial calibration of the waveguide structure. Utility Model Content
[0005] Based on the technical problems existing in the background technology, the utility model proposes an optical path deviation correction device for a polarization interferometer to realize the optical path deviation correction of the polarization interferometer.
[0006] The utility model proposes an optical path deviation correction device for a polarization interferometer, comprising a rotating mechanism, a linear telescopic mechanism, a mirror frame mechanism and a linear bearing assembly;
[0007] The rotating mechanism is arranged at the bend of the waveguide to transmit the light;
[0008] The linear telescopic mechanism is fixedly connected to the rotating mechanism, one end of the linear telescopic mechanism is connected to the waveguide, and the other end is connected to the frame mechanism to introduce light into the frame mechanism;
[0009] The linear bearing assembly is rotatably connected to the rotating mechanism so that the linear bearing assembly rotates along with the rotation of the rotating mechanism;
[0010] The mirror frame mechanism is rotatably connected to the rotating mechanism, and one end is arranged through the linear bearing assembly so as to drive the rotation of the mirror frame mechanism through the rotation of the linear bearing assembly.
[0011] Further, the rotating mechanism includes a supporting assembly, a first connecting rod and a second connecting rod;
[0012] The two support assemblies are arranged at 90 degrees, and the two support assemblies are rotatably connected to form a first connection point, one end of the first connecting rod is rotatably connected to one end of the second connecting rod to form a second connection point, and the other end is rotatably connected to one of the support assemblies to form a third connection point, and the other end of the second connecting rod is rotatably connected to another support assembly to form a fourth connection point. The first connection point, the second connection point, the third connection point, and the fourth connection point are combined to form a four-bar linkage mechanism, and the lengths of the individual rods of the four-bar linkage mechanism are equal.
[0013] Furthermore, the two support assemblies include a first support rod, a second support rod, a first side plate and a second side plate; a first support rod is fixedly connected with two first side plates to form one support assembly, and a second support rod is fixedly connected with two second side plates to form another support assembly;
[0014] The rotational connection between the two first side plates and the two second side plates forms two four-bar linkages.
[0015] Furthermore, the two linear telescopic mechanisms are fixedly connected to the two supporting assemblies respectively;
[0016] The linear telescopic mechanism comprises an inner embedded cylinder, an outer wrapped sleeve, a ball and a cover plate;
[0017] A deep hole is provided on the outer periphery of the outer wrapping sleeve, the ball is arranged in the deep hole, and the cover plate covers the deep hole and is fixedly connected to the outer wrapping sleeve;
[0018] The embedded cylinder is hollow and connected to the through hole opened on the supporting component;
[0019] One end of the inner cylinder is sleeved inside the outer sleeve and connected with the ball bearing to realize the extension and rotation of the inner cylinder.
[0020] Furthermore, the frame mechanism includes a frame, lenses, a back connecting rod and a side connecting rod;
[0021] The lens is set at the front of the frame to transmit light;
[0022] The two side connecting rods are respectively arranged on opposite sides of the frame and are rotatably connected to the two supporting assemblies respectively;
[0023] One end of the back connecting rod is connected to the back of the mirror frame, and the other end is arranged through the linear bearing assembly.
[0024] Furthermore, the back connecting rod is arranged perpendicular to the frame.
[0025] Furthermore, when the rotating mechanism does not rotate, the lens is at an angle of 45 degrees to the incident light;
[0026] When the rotating mechanism rotates, the waveguide rotation angle is twice the lens rotation angle.
[0027] Further, the linear bearing assembly includes a side connecting shaft, a bearing bushing and a sliding bearing;
[0028] The sliding bearing is arranged in the bearing bushing, and the two ends of the bearing bushing are respectively connected to the side connecting shafts, and the end of each side connecting shaft is rotatably connected to the adjacent second connecting point, and the back connecting rod is arranged through the sliding bearing.
[0029] Furthermore, the side connecting shaft, the bearing bushing and the sliding bearing are integrally arranged.
[0030] Furthermore, the bearing bushing is connected to the side connecting shaft by bolts.
[0031] The advantages of the optical path deviation correction device for polarization interferometer provided by the utility model are: the optical path deviation correction device for polarization interferometer provided in the utility model structure can meet the requirements of realizing optical path compensation through its own internal structure without human intervention, and correct the optical path deviation caused by the displacement of the waveguide support structure, and the error can be less than rad level; the 90-degree setting between the two supporting components makes the linear telescopic mechanisms respectively connected to the two supporting components also set at 90 degrees, so that the frame mechanism can be 45 degrees with the axes of the two linear telescopic mechanisms, so that when the optical path correction is not required, the frame mechanism is set at a 45-degree angle at the waveguide turning point to transmit light; when the waveguide rotates, the light incident on the lens changes from a vertical straight line to an inclined light. Since the length of the inclined line is greater than the length of the vertical straight line, in order to ensure the stable transmission of the light, this embodiment uses the elongation effect of the linear telescopic mechanism to increase the channel length of the guided light, thereby improving the stable transmission of the light. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a schematic diagram of the structure of the utility model;
[0033] Figure 2 It is a structural schematic diagram of the rotating mechanism;
[0034] Figure 3 It is a structural schematic diagram of a linear telescopic mechanism;
[0035] Figure 4 for Figure 3 sectional view of
[0036] Figure 5 is a structural schematic diagram of a mirror frame mechanism;
[0037] Figure 6 It is a structural schematic diagram of a linear bearing assembly;
[0038] Figure 7 A schematic diagram showing the relationship between the deflection angle of light and the rotation angle of the lens;
[0039] Among them, 1-rotation mechanism, 2-linear telescopic mechanism, 3-frame mechanism, 4-linear bearing assembly, 11-support assembly, 12-first connecting rod, 13-second connecting rod, 14-load-bearing shaft, 21-embedded cylinder, 22-outer sleeve, 23-ball, 24-cover plate, 31-frame, 32-lens, 33-back connecting rod, 34-side connecting rod, 41-side connecting shaft, 42-bearing lining, 43-sliding bearing, 111-first support rod, 112-second support rod, 113-first side plate, 114-second side plate. DETAILED DESCRIPTION
[0040] Below, the technical solution of the utility model is described in detail through specific embodiments. Many specific details are described in the following description to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific implementation disclosed below.
[0041] like Figures 1 to 7 As shown, the utility model proposes an optical path deviation correction device for a polarization interferometer, comprising a rotating mechanism 1, a linear telescopic mechanism 2, a frame mechanism 3 and a linear bearing assembly 4; the rotating mechanism 1 is arranged at a waveguide bend to transmit light; the linear telescopic mechanism 2 is fixedly connected to the rotating mechanism 1, one end of the linear telescopic mechanism 2 is connected to the waveguide, and the other end is connected to the frame mechanism 3 to introduce light into the frame mechanism 3; the linear bearing assembly 4 is rotatably connected to the rotating mechanism 1 to realize that the linear bearing assembly 4 rotates with the rotation of the rotating mechanism 1; the frame mechanism 3 is rotatably connected to the rotating mechanism 1, and one end is arranged to pass through the linear bearing assembly 4 to drive the rotation of the frame mechanism 3 through the rotation of the linear bearing assembly 4.
[0042] In the existing device, a 45° oblique lens is fixed at the bend of the waveguide to propagate the light source. When the light is slightly deflected, manual alignment of the light is required. In this embodiment, when vibration occurs or a slight deviation occurs during installation, the rotating mechanism 1 is deflected at a certain angle, and the frame mechanism 3 is also driven to rotate at a certain angle, thereby achieving automatic alignment of the light without the need for manual alignment.
[0043] In addition, although using electronic components for real-time alignment is also a good option, it is not allowed because electronic components will be affected in a radiation environment and cause problems. For the correction of optical path offset in plasma equipment, it is better to use a purely mechanical structure to solve this problem.
[0044] The next generation fusion device generates a large amount of radiation when conducting deuterium-tritium fusion experiments. The polarization interferometer provides a guarantee for the safe conduct of the experiment. However, the light of the polarization interferometer needs to be aligned at all times. Due to the influence of various factors, it is impossible to achieve that the light does not deviate when it is fixed. When deviate, it needs to be corrected in time. Manual adjustment is performed on EAST (Fully Superconducting Tokamak Nuclear Fusion Experimental Device). Since the next generation fusion device experiment generates a large amount of radiation, manual alignment is impossible. The optical path deviation correction of this embodiment solves this problem.
[0045] This embodiment mainly realizes the steering of the waveguide at the transition point through the cooperation between mechanical structures. The steering can be regarded as a circular arc trajectory motion in a plane. The motion mechanism of this embodiment is first determined according to the motion mode. The mechanisms that can perform circular arc trajectory motion are:
[0046] 1. Arc rail and synchronous belt drive mechanism. The arc rail and synchronous belt drive mechanism drives the synchronous belt wheel to rotate through the motor, thereby driving the slider to move back and forth along the arc rail.
[0047] 2. Circular trajectory motion mechanism under multi-positioning constraints. The circular trajectory motion mechanism under multi-positioning constraints completes the arc trajectory motion through the combination of base, lifting seat, support seat, multi-link and driving link.
[0048] 3. Four-bar linkage. The four-bar linkage can make a part of the mechanism move along a circular trajectory by reasonably designing the length of the connecting rod and the connection method.
[0049] 4. Gear rack mechanism. The gear rack structure can drive an object to move along a predetermined arc trajectory through the meshing transmission of the gear and the rack.
[0050] Since nuclear reactions will generate huge radiation and the space for placing the mechanism is small, it is impossible to use motors and more complex structures. The four-bar linkage can achieve the movement of the mechanism in a circular arc trajectory by reasonably designing the length of the connecting rod and the connection method, which is more in line with the design requirements. Finally, this embodiment selects the four-bar linkage as the motion mechanism of the optical path offset correction device.
[0051] In this embodiment, if vibration or a slight deviation occurs during installation, causing the rotating part to deflect by a certain angle, the rotating mechanism 1 will drive the connecting rod to move, so that the angle between the two connecting rods changes from the ideal 90° to other angles. Since the two sides of the frame mechanism 3 are connected to the rotating assembly and the back passes through the linear telescopic mechanism 2, when the rotating mechanism 1 and the connecting rod angle change, the frame mechanism 3 will also be driven to rotate by a certain angle.
[0052] Regarding the relationship between the deflection angle of light and the rotation angle of the lens: Figure 7 As shown, the initial angle of the lens is 45°, represented by lens 1, incident light 1 is incident vertically on lens 1, the incident angle is 45° and the light propagates in the center of the optical waveguide, assuming that the waveguide is not incident vertically due to vibration or assembly error, as shown by incident light 2, incident light 2 and incident light 1 form an angle - angle 5, according to the law of reflection, angle 2 = angle 6 + angle 7, so angle 6 = angle 2 - angle 7, since angle 1 = angle 2 + angle 3 = angle 5 + angle 6 = 45°, angle 7 = angle 3, so angle 5 = angle 2 + angle 3 - angle 6, that is, angle 5 = 2 angle 7, angle 7 is the angle of lens deflection, angle 5 is the angle of light deflection, that is, the light deflection angle is twice the lens deflection angle, when this condition is met, no matter how the incident light is deflected, the outgoing light will eventually maintain the original direction. This embodiment is designed based on this condition, when the waveguide rotates, it will drive the lens to rotate and the waveguide rotation angle is twice the lens rotation angle. Since the lens and the normal are perpendicular to each other, the angle 4 formed by the two normals = the angle 7 formed by the two lenses. When applied to the flexible structure, when the waveguide rotates a certain angle, the rotating assembly drives the back connecting rod of the frame assembly to rotate. The back connecting rod is perpendicular to the mirror surface and is on the same line as the normal. That is, the waveguide rotation angle is twice that of the lens.
[0053] In this embodiment, if Figure 2The rotating mechanism 1 includes a supporting assembly 11, a first connecting rod 12 and a second connecting rod 13; the two supporting assemblies 11 are arranged at 90 degrees, and the two supporting assemblies 11 are connected by rotation to form a first connection point, one end of the first connecting rod 12 is connected by rotation to one end of the second connecting rod 13 to form a second connection point, and the other end is connected by rotation to one of the supporting assemblies 11 to form a third connection point, and the other end of the second connecting rod 13 is connected by rotation to another supporting assembly 11 to form a fourth connection point, and the first connection point, the second connection point, the third connection point and the fourth connection point are combined to form a four-bar linkage mechanism, and the lengths of the bars of the four-bar linkage mechanism are equal. The two supporting assemblies 11 include a first supporting rod 111, a second supporting rod 112, a first side plate 113 and a second side plate 114; a first supporting rod 111 is fixedly connected to two first side plates 113 to form a supporting assembly 11, and a second supporting rod 112 is fixedly connected to two second side plates 114 to form another supporting assembly 11; the rotation connection between the two first side plates 113 and the two second side plates 114 forms two four-bar linkage mechanisms.
[0054] The rotation trajectory of the four-bar linkage is an arc trajectory. The principle used is the four-bar linkage mentioned above. The lengths of the various rods of the four-bar linkage are the same, and it can be used as a double crank mechanism in the four-bar linkage to satisfy forward and reverse rotation.
[0055] The support assembly 11 is connected to the connected connecting rod (the first connecting rod 12 or the second connecting rod 13) through the load-bearing shaft 14. The parts where the support assembly 11 and the connecting rod are connected to the load-bearing shaft 14 are respectively provided with rotating bearings, which can reduce the friction between the load-bearing shaft 14 and the support assembly 11 and the connecting rod, respectively, making their rotation smoother.
[0056] The 90-degree setting between the two support assemblies 11 enables the linear telescopic mechanisms 2 respectively connected to the two support assemblies 11 to also be set at 90 degrees, so that the frame mechanism 3 can be 45 degrees with the axes of the two linear telescopic mechanisms 2, so that when no optical path correction is required, the frame mechanism 3 is set at a 45-degree angle at the waveguide bend to transmit light.
[0057] In this embodiment, if Figure 3 and 4 , the two linear telescopic mechanisms 2 are fixedly connected to the two supporting components 11 respectively; the linear telescopic mechanism 2 includes an embedded cylinder 21, an outer wrapped sleeve 22, a ball 23 and a cover plate 24; a deep hole is opened on the outer periphery of the outer wrapped sleeve 22, the ball 23 is arranged in the deep hole, and the cover plate 24 covers the deep hole and is fixedly connected to the outer wrapped sleeve 22; the embedded cylinder 21 is hollow and connected to the through hole opened on the supporting component 11; one end of the embedded cylinder 21 is sleeved inside the outer wrapped sleeve 22 and is connected to the ball 23 to realize the telescopic and rotation of the embedded cylinder 21.
[0058] When the waveguide rotates, the light incident on the lens 32 changes from a vertical straight line to an inclined light. Since the length of the inclined line is greater than the length of the vertical straight line, in order to ensure the stable transmission of the light, this embodiment uses the elongation effect of the linear telescopic mechanism 2 to increase the channel length of the guided light, thereby improving the stable transmission of the light.
[0059] In addition, with respect to the elongation movement of the linear telescopic mechanism 2, when the waveguide rotates, the rotating mechanism 1 is driven to rotate, so that the embedded cylinder 21 moves a certain distance away from the outer wrapping sleeve 22. This distance is based on the triangle principle, with the vertical light as a vertical side and the rotation angle as the included angle. The length of the inclined light can be obtained through trigonometric calculation. The difference between the length of the inclined light and the length of the vertical light is the movement distance of the embedded cylinder 21 (i.e., the elongation length of the linear telescopic mechanism 2).
[0060] In this embodiment, as shown in Figures 6 and 7, the frame mechanism 3 includes a frame 31, a lens 32, a back connecting rod 33 and a side connecting rod 34; the lens 32 is arranged at the front of the frame 31 for transmitting light; two side connecting rods 34 are respectively arranged at opposite sides of the frame 31 and are rotatably connected to two support assemblies 11; one end of the back connecting rod 33 is connected to the back of the frame 31, and the other end is arranged through the linear bearing assembly 4, and the back connecting rod 33 is arranged vertically with the frame 31. The linear bearing assembly 4 includes a side connecting shaft 41, a bearing bushing 42 and a sliding bearing 43; the sliding bearing 43 is arranged in the bearing bushing 42 and fixed by bolts, the two ends of the bearing bushing 42 are respectively connected to the side connecting shaft 41 and connected by bolts, and the end of each side connecting shaft 41 is rotatably connected to the adjacent second connection point, and the back connecting rod 33 is arranged through the sliding bearing 43.
[0061] The rotational connection between the frame mechanism 3 and the support assembly 11 is specifically as follows: the back connecting rod 33 passes through the first side plate 113 and the second side plate 114, and a bearing is provided at the connection between the first side plate 113 and the second side plate 114 to realize the rotational setting of the back connecting rod 33.
[0062] The four-bar linkage formed by the first connection point, the second connection point, the third connection point and the fourth connection point, when the rotating mechanism 1 rotates, the second connection point is shifted due to the rotation, driving the linear bearing assembly 4 to shift in position, so that the back connecting rod 33 passing through the sliding bearing 43 rotates accordingly. Due to the vertical relationship between the back connecting rod 33 and the frame 31, the frame will rotate with the rotation of the back connecting rod 33, thereby realizing the rotation of the lens 32, and finally realizing the stable transmission of inclined light.
[0063] Working process: The optical path deviation correction device of this embodiment is set at the waveguide transition, and the light is transmitted based on the reflection effect of the lens 32. When the waveguide rotates, the four-bar linkage will rotate accordingly, and the linear bearing assembly connected to the second connection point of the four-bar linkage will rotate to drive the lens 32 to rotate. At the same time, the linear telescopic mechanism performs telescopic movement to better guide the light into the lens 32. Through the reflection effect of the lens 32 after rotation, the inclined light can be propagated in the center of the next waveguide.
[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An optical path deviation correction device for a polarization interferometer, characterized in that: It comprises a rotating mechanism (1), a linear telescopic mechanism (2), a mirror frame mechanism (3) and a linear bearing assembly (4); The rotating mechanism (1) is arranged at the bend of the waveguide to transmit light; The linear telescopic mechanism (2) is fixedly connected to the rotating mechanism (1); one end of the linear telescopic mechanism (2) is connected to the waveguide, and the other end is connected to the mirror frame mechanism (3) so as to guide light into the mirror frame mechanism (3); The linear bearing assembly (4) is rotatably connected to the rotating mechanism (1) so that the linear bearing assembly (4) rotates along with the rotation of the rotating mechanism (1); The mirror frame mechanism (3) is rotatably connected to the rotating mechanism (1), and one end of the mirror frame mechanism (3) is arranged to pass through the linear bearing assembly (4), so that the rotation of the linear bearing assembly (4) drives the rotation of the mirror frame mechanism (3).
2. The optical path deviation correction device for polarization interferometer according to claim 1, characterized in that: The rotating mechanism (1) comprises a supporting assembly (11), a first connecting rod (12) and a second connecting rod (13); The two support assemblies (11) are arranged at 90 degrees, and the two support assemblies (11) are rotatably connected to form a first connection point, one end of the first connecting rod (12) is rotatably connected to one end of the second connecting rod (13) to form a second connection point, and the other end is rotatably connected to one of the support assemblies (11) to form a third connection point, and the other end of the second connecting rod (13) is rotatably connected to the other support assembly (11) to form a fourth connection point, and the first connection point, the second connection point, the third connection point, and the fourth connection point are combined to form a four-bar linkage mechanism, and the lengths of the bars of the four-bar linkage mechanism are equal.
3. The optical path deviation correction device for polarization interferometer according to claim 2, characterized in that: The two support assemblies (11) comprise a first support rod (111), a second support rod (112), a first side plate (113) and a second side plate (114); a first support rod (111) and two first side plates (113) are fixedly connected to form one support assembly (11), and a second support rod (112) and two second side plates (114) are fixedly connected to form another support assembly (11); The rotational connection between the two first side plates (113) and the two second side plates (114) forms two four-bar linkages.
4. The optical path deviation correction device for polarization interferometer according to claim 2, characterized in that: The two linear telescopic mechanisms (2) are respectively fixedly connected to the two support assemblies (11); The linear telescopic mechanism (2) comprises an inner embedded cylinder (21), an outer wrapped sleeve (22), a ball (23) and a cover plate (24); A deep hole is provided on the outer circumference of the outer wrapping sleeve (22), the ball (23) is arranged in the deep hole, and the cover plate (24) covers the deep hole and is fixedly connected to the outer wrapping sleeve (22); The embedded cylinder (21) is hollow and communicates with a through hole provided on the support assembly (11); One end of the embedded cylinder (21) is sleeved inside the outer wrapping sleeve (22) and connected to the ball (23) to achieve the telescopic and rotation of the embedded cylinder (21).
5. The optical path deviation correction device for polarization interferometer according to claim 2, characterized in that: The frame mechanism (3) comprises a frame (31), a lens (32), a back connecting rod (33) and a side connecting rod (34); The lens (32) is arranged at the front of the frame (31) and is used for transmitting light; Two side connecting rods (34) are respectively arranged on opposite sides of the mirror frame (31), and are respectively rotatably connected to the two supporting assemblies (11); One end of the back connecting rod (33) is connected to the back of the mirror frame (31), and the other end is arranged through the linear bearing assembly (4).
6. The optical path deviation correction device for polarization interferometer according to claim 5, characterized in that: The back connecting rod (33) is arranged vertically to the mirror frame (31).
7. The optical path deviation correction device for polarization interferometer according to claim 5, characterized in that: When the rotating mechanism (1) does not rotate, the lens (32) forms an angle of 45 degrees with the incident light; When the rotating mechanism (1) rotates, the rotation angle of the waveguide is twice the rotation angle of the lens (32).
8. The optical path deviation correction device for polarization interferometer according to claim 5, characterized in that: The linear bearing assembly (4) comprises a side connecting shaft (41), a bearing bushing (42) and a sliding bearing (43); The sliding bearing (43) is arranged in the bearing bushing (42), and the two ends of the bearing bushing (42) are respectively connected to the side connecting shafts (41), and the end of each side connecting shaft (41) is rotatably connected to an adjacent second connecting point, and the back connecting rod (33) is arranged through the sliding bearing (43).
9. The optical path deviation correction device for polarization interferometer according to claim 8, characterized in that: The bearing bushing (42) is connected to the side connecting shaft (41) by bolts.