Multi-degree-of-freedom liquid crystal light valve transmittance testing device based on probe station

Abstract

The invention discloses a multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station, and the device comprises a working frame which is detachably provided with a bearing platform, and the bearing platform is provided with a light source receiver connected with a liquid crystal light valve; the rotary testing mechanism comprises an L-shaped bending plate fixed on the working frame, an air cylinder is fixedly installed at the bottom of the L-shaped bending plate, a piston rod on the air cylinder is connected with a lifting rod, a cam groove is formed in the edge of the outer wall of the lifting rod, and the cam groove abuts against and is attached to the protruding part on the rotating ring. An annular groove is formed in the rotating ring, and one end of the annular groove is fixedly connected to the L-shaped bent plate through a supporting ring. The technical problems that when an irradiation light source works, the design of a transmission structure is complex, meanwhile, the rotation angle of the irradiation light source needs to be manually adjusted, refraction light transmittance data at different angles are obtained, and operation is complex can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid crystal product testing devices, and particularly relates to a multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station. Background Art

[0002] A liquid crystal light valve realizes the phase delay of light by controlling the refractive index of liquid crystal molecules through voltage. Liquid crystal materials are filled between two flat glass plates, and transparent electrodes and calibration layers are plated on the glass plates. The gap between the glass plates is controlled by fine glass fibers at its edges. This forms a liquid crystal phase retarder. When the voltage on both sides of the liquid crystal is zero and the arrangement direction of the liquid crystal molecules is parallel to the direction of the glass plate, the difference between the refractive indices of the o-ray and the e-ray is the largest. As the voltage at both ends of the liquid crystal layer increases, the liquid crystal molecules start to rotate, and the difference between the refractive indices of the o-ray and the e-ray gradually decreases until they are almost equal.

[0003] The liquid crystal light valve is a liquid crystal twisted nematic product used in welding masks. It can double-filter light, avoid harmful radiation of ultraviolet and infrared rays generated by the electric arc, and the damage to the eyes caused by the strong welding light, and prevent the occurrence of photoelectric ophthalmia.

[0004] The working principle of the liquid crystal light valve is based on the electro-optical effect of liquid crystal materials, and the specific steps are as follows: 1. Incident polarized light: The incident light first passes through a polarizer and is restricted to light with a specific polarization direction; 2. Electric field modulation: An electric field is applied to the liquid crystal layer, and the arrangement of the liquid crystal molecules changes, changing the refractive index of the liquid crystal layer for light; 3. Light modulation: When the incident light passes through the liquid crystal layer, due to the change in the arrangement of the liquid crystal molecules, the polarization state and transmittance performance of the light also change; 4. Projection display: The modulated light is projected onto the screen through a projection lens to form the required image.

[0005] When testing the transmittance of the liquid crystal light valve, it is necessary to obtain the transmittance data of the liquid crystal light valve by means of multi-point irradiation with an irradiation light source. However, it is often necessary to use an X-axis driver and a Y-axis driver in cooperation to achieve the directional movement of multiple points. The transmission structure design is relatively complex. At the same time, the irradiation light source needs to be manually adjusted to rotate the angle to obtain the refractive transmittance data at different angles. The operation is relatively complex, reducing the work efficiency and being unfavorable for improving the practicality of the device. Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station to solve the technical problems that when the irradiation light source works, it often needs to use an X-axis driver and a Y-axis driver in cooperation to achieve the directional movement of multiple points, the transmission structure design is relatively complex, and at the same time, the irradiation light source needs to be manually adjusted to rotate the angle to obtain the refractive transmittance data at different angles, and the operation is relatively complex.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station, comprising: A working frame, on which a bearing table is detachably installed, and a light source receiver connected to the liquid crystal light valve is provided on the bearing table; A rotation testing mechanism, the rotation testing mechanism includes an L-shaped bending plate fixed on the working frame, a cylinder is fixedly installed at the bottom of the L-shaped bending plate, a piston rod on the cylinder is connected to a lifting rod, a cam groove is formed on the outer wall edge of the lifting rod, and the cam groove is in contact and fit with a protruding part on a rotating ring. An annular groove is formed on the rotating ring, and one end of the annular groove is fixedly connected to the L-shaped bending plate through a support ring, and the rotating ring is connected to the support ring in a rotating and movable manner; Both sides of the bottom end of the rotating ring are provided with covers through brackets, a first light source emitting head adapted to the cover is installed at the bottom of the cover, and the cover is arranged in a cylindrical shape.

[0008] Further, both ends of the piston rod on the cylinder are connected to a slider through a swing rod, the slider is connected with a concave groove along the length direction of the fixed plate, and the bottom of the slider is fixed on a gear plate. The bottom of the gear plate is meshed and driven with a rotating gear fixed on a steering rod, and a rotating groove connected to the side wall of the fixed plate is provided on the central axis of the rotating gear.

[0009] Further, a second light source emitting head is connected to the central axis of the rotating gear through a fixing rod, a strip-shaped hole connected to the gear plate is provided on the fixed plate, one end of the fixed plate is fixed on the working frame through a column, and both sides of the swing rod are installed on the piston rod and the slider of the cylinder in a rotatable connection manner.

[0010] Further, a cleaning and guiding mechanism is further included. The cleaning and guiding mechanism includes a push rod fixed on the gear plate. One end of the push rod is connected to a U-shaped rod. One end of the U-shaped rod penetrates through a through hole on a support plate and extends to a moving frame. The center of the moving frame is fixed on the support plate through a first spring, and one end of the moving frame is connected to a brush plate placed on the upper surface of the liquid crystal light valve through a mounting rod. The brush plate is provided with bristles by means of adhesive fixation, and the brush plate is symmetrically arranged with respect to the center of the L-shaped bending plate.

[0011] Further, a plug rod is installed at the top end of the moving frame through a baffle. A cavity for the light irradiation area on the second light source emitting head is formed between the plug rods, and the outer wall of the plug rod is connected to an arc-shaped plate through a plug-in installation method. A guiding groove connected to the cover is formed between the arc-shaped plates, and slopes are integrally formed at both ends of the outer wall of the arc-shaped plate.

[0012] Furthermore, one end of the insertion rod is connected to the side wall of the baffle through a second spring, and both ends of the outer wall of the insertion rod are provided with rollers placed on the inner wall of the baffle, the center of the roller moves on the inner wall of the baffle through a rotating shaft, and a movable cavity connected to the roller is formed between the inner wall of the baffle and the insertion rod.

[0013] Furthermore, the insertion rod and the baffle are maintained vertically arranged, and an elastic pad is installed on the second spring close to the side wall of the baffle.

[0014] Furthermore, bases are fixedly installed around the bottom of the working frame, and the working frame is provided with limiting grooves connected to the bearing platform.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) A rotating test mechanism is set up. After the cylinder on the L-shaped bending plate is started, it can drive the lifting rod to move up and down. In conjunction with the cam groove on the lifting rod and the protrusion on the rotating ring, the vertical movement of the lifting rod can be converted into the rotational movement of the rotating ring on the supporting ring. At the same time, the annular groove on the rotating ring can ensure the free rotation of the rotating ring, and can also allow the supporting ring to provide corresponding supporting force to the rotating ring. During the rotation of the rotating ring, the first light source transmitter head can be driven to rotate. By rotating the multi-point emission method, in conjunction with the light source receiver on the carrier, the light source refraction transmittance data can be received in time, so as to quickly obtain the transmittance data of a large area. The structural design is reasonable, the integrated performance is strong, and the automation effect is good.

[0016] (2) A sliding mechanism is provided. When the piston rod on the cylinder moves up and down, the gear plate on the slider can move back and forth horizontally in the strip hole with the help of the rotation connection of the swing rod. The groove setting on the fixed plate can prevent the slider from deviating from its position during the movement, thereby ensuring the stability of the transmission parts. In addition, when the gear plate is in meshing transmission with the rotating gear, the central axis on the rotating gear drives the second light source emitter to rotate back and forth at a certain angle. During the rotation, the second light source emitter will illuminate the liquid crystal light valve with light sources of different degrees of freedom, thereby obtaining test data of the refractive transmittance of the liquid crystal light valve at different angles. This can effectively improve the comprehensiveness of the test data of the liquid crystal light valve, and the test data has high accuracy.

[0017] (3) A cleaning guide mechanism is provided. The gear plate can drive the synchronous movement of the U-shaped rod during the movement. During the movement of the U-shaped rod, on the one hand, it can drive the brush plate to move back and forth, so that the upper surface of the liquid crystal light valve can be effectively cleaned by brush cleaning, thereby preventing dust particles from accumulating on the liquid crystal light valve and avoiding affecting the normal test work. On the other hand, during the movement of the U-shaped rod, it can drive the arc plate on the plug rod to move together. That is to say, when the rotation trajectory of the cover body on the first light source emission head is set in a ring shape and the cover body moves to the outer wall of the arc plate, the arc plate also moves to the outer wall of the cover body at the same time, which can play an effective protective guiding role. In addition, the slope surface set on the arc plate cooperates with the spring assembly to effectively buffer and adjust the resistance force of the cover body, prevent excessive force from causing large collision damage, and improve the service life and application effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The structure diagram of the multi-degree-of-freedom liquid crystal light valve transmittance test device based on the probe station of the present invention is shown in FIG. Figure 1 ; Figure 2 The structure diagram of the multi-degree-of-freedom liquid crystal light valve transmittance test device based on the probe station of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a front view of a multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station of the present invention; Figure 4 is an exploded view of the lifting rod and the support ring of the present invention; Figure 5 It is a schematic structural diagram of the rotating ring of the present invention; Figure 6 The present invention Figure 1 A magnified image of point A; Figure 7 The present invention Figure 2 A magnified view of point B; Figure 8 It is a schematic diagram of the meshing transmission between the gear plate and the rotating gear of the present invention; Figure 9 It is a connection schematic diagram of the plug rod and the baffle of the present invention.

[0020] Reference numerals: 1, working frame; 2, bearing platform; 3, rotary test mechanism; 4, cylinder; 5, lifting rod; 6, cam groove; 7, rotating ring; 8, protruding part; 9, annular groove; 10, support ring; 11, cover body; 12, first light source emitting head; 13, slider; 14, swing rod; 15, fixing plate; 16, gear plate; 17, steering rod; 18, rotating gear; 19, fixing rod; 20, second light source emitting head; 21, cleaning guiding mechanism; 22, push rod; 23, U-shaped rod; 24, moving frame; 25, first spring; 26, brush plate; 27, baffle; 28, inserting rod; 29, arc plate; 30, slope; 31, second spring; 32, roller. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Refer to the attached drawings of the specification Figure 1 and the attached Figure 2 As shown, a multi-degree-of-freedom liquid crystal light valve transmittance test device based on a probe station includes: a working frame 1, a bearing platform 2 is detachably installed on the working frame 1, and a light source receiver connected to the liquid crystal light valve is provided on the bearing platform 2; A rotary test mechanism 3, the rotary test mechanism 3 includes an L-shaped bent plate fixed on the working frame 1, a cylinder 4 is fixedly installed at the bottom of the L-shaped bent plate, a piston rod on the cylinder 4 is connected to a lifting rod 5, a cam groove 6 is opened on the outer wall edge of the lifting rod 5, the cam groove 6 abuts and fits with a protruding part 8 on a rotating ring 7, an annular groove 9 is opened on the rotating ring 7, and one end of the annular groove 9 is fixedly connected to the L-shaped bent plate through a support ring 10, and the rotating ring 7 is connected to the support ring 10 in a rotating and movable manner; Both sides of the bottom end of the rotating ring 7 are installed with cover bodies 11 through brackets, a first light source emitting head 12 adapted to the cover body 11 is installed at the bottom of the cover body 11, and the cover body 11 is arranged in a cylindrical shape.

[0023] A rotation test mechanism 3 is provided. After the cylinder 4 on the L-shaped bending plate is activated, it can drive the up-and-down movement of the lifting rod 5. In cooperation with the cam groove 6 on the lifting rod 5 and the protrusion 8 on the rotating ring 7, the vertical movement of the lifting rod 5 can be converted into the rotational movement of the rotating ring 7 on the support ring 10. At the same time, the annular groove 9 provided on the rotating ring 7 allows the rotating ring 7 to rotate freely and enables the support ring 10 to provide corresponding support force to the rotating ring 7. During the rotation of the rotating ring 7, it can drive the first light source emitting head 12 to perform rotational movement. Through the method of multi-point emission by rotation and in cooperation with the light source receiver on the bearing table 2, the light source refraction transmittance data can be received in a timely manner, thereby quickly obtaining the transmittance data of a larger area. The structural design is reasonable, the integration performance is strong, and the automation effect is good.

[0024] Specifically, the rotation test mechanism 3 itself performs multi-point testing on the liquid crystal light valve through the rotating motion of the first light source emitting head 12, so as to quickly obtain test data. Moreover, the light rays on the first light source emitting head 12 can enter at a vertical angle, and the refraction transmittance data of the liquid crystal light valve is obtained through the method of normal incidence.

[0025] The protrusion 8 on the rotating ring 7 is connected to the cam groove 6 on the outer wall of the lifting rod 5 in a way of abutting and fitting. In this way, during the up-and-down movement of the lifting rod 5, the acting force can be transmitted to the rotating ring 7 and make it rotate. Moreover, the setting of the L-shaped bending plate can not only provide a connection point for the cylinder 4 but also provide a connection point for the cross beam at the extension end of the support ring 10, thus facilitating the installation and fixation of structural components.

[0026] Reference Figure 1 、 Figure 3 and Figure 8 , both ends of the piston rod of the cylinder 4 and the slider 13 are connected by a swing rod 14. The slider 13 is connected with a concave groove along the length direction of the fixed plate 15, and the bottom of the slider 13 is fixed on the gear plate 16. The bottom of the gear plate 16 is meshed with a rotating gear 18 fixed on the steering rod 17, and a rotating groove connected to the side wall of the fixed plate 15 is provided on the central axis of the rotating gear 18.

[0027] The central axis of the rotating gear 18 is connected with a second light source emitting head 20 through a fixing rod 19. A strip hole connected to the gear plate 16 is provided on the fixed plate 15. One end of the fixed plate 15 is fixed on the workbench 1 through a column, and both sides of the swing rod 14 are installed on the piston rod and the slider 13 of the cylinder 4 in a way of rotational connection.

[0028] Specifically, during the up-and-down movement of the piston rod of the air cylinder 4, through the rotational connection of the swing rod 14, the gear plate 16 on the slider 13 can be horizontally moved. And with the gear meshing transmission, the rotating gear 18 can drive the second light source emitting head 20 to rotate at a certain angle, so as to obtain the refractive transmittance data of the liquid crystal light valve at different angles.

[0029] A sliding mechanism is provided. When the piston rod on the air cylinder 4 moves up and down, through the rotational connection of the swing rod 14, the gear plate 16 on the slider 13 can move back and forth horizontally in the strip-shaped hole. Moreover, the groove on the fixed plate 15 can prevent the slider 13 from deviating in position during the movement, ensuring the stability of the transmission part during operation. In addition, during the meshing transmission between the gear plate 16 and the rotating gear 18, the central shaft on the rotating gear 18 drives the second light source emitting head 20 to rotate back and forth at a certain angle. During the rotation, the second light source emitting head 20 irradiates the liquid crystal light valve with light sources in different degrees of freedom, so as to obtain the test data of the refractive transmittance of the liquid crystal light valve at different angles. In this way, the comprehensiveness of the test data of the liquid crystal light valve can be effectively improved, and the test data has high accuracy.

[0030] At the same time, a cavity is formed between the insertion rods 28, which is the light irradiation area on the second light source emitting head 20, and can provide space for the light to pass through, preventing the light from generating interference during the passing process, which in turn affects the normal light source irradiation work. In addition, the strip-shaped hole on the fixed plate 15 can also ensure the normal movement of the gear plate 16, and is convenient for the penetration and movement of the push rod 22 on the gear plate 16. That is to say, during the movement of the gear plate 16, it not only transmits the acting force to the rotating gear 18 to make it rotate, but also drives the movement of the cleaning and guiding mechanism 21.

[0031] Reference Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 9 Based on the above, the multi-degree-of-freedom liquid crystal light valve transmittance test device of the probe station further includes a cleaning and guiding mechanism 21. The cleaning and guiding mechanism 21 includes a push rod 22 fixed on the gear plate 16. One end of the push rod 22 is connected to a U-shaped rod 23. One end of the U-shaped rod 23 penetrates through the through hole on the support plate and extends to the moving frame 24. The center of the moving frame 24 is fixed on the support plate by a first spring 25. And one end of the moving frame 24 is connected with a brush plate 26 placed on the upper surface of the liquid crystal light valve through a mounting rod. The brush plate 26 is installed with bristles by means of adhesive fixation, and the brush plate 26 is symmetrically arranged with respect to the center of the L-shaped bending plate.

[0032] Specifically, a plug rod 28 is installed at the top of the moving frame 24 through a baffle 27. A cavity corresponding to the light irradiation area on the second light source emitting head 20 is formed between the plug rods 28. The outer wall of the plug rod 28 is connected to the arc-shaped plate 29 in a plug-in mounting manner. A guiding groove connected to the cover body 11 is formed between the arc-shaped plates 29. Both ends of the outer wall of the arc-shaped plate 29 are integrally formed with slopes 30.

[0033] Compared with directly fixing the arc-shaped plate 29 in a fixed connection manner, the technical solution of the present invention realizes the abutting and fitting of the cover body 11 by moving the arc-shaped plate 29 back and forth, so as to limit and guide it. On the one hand, this can shorten the length of the plug rod 28 and reduce the design cost. On the other hand, the bracket on the cover body 11 can be designed as a telescopic structure. Under the pushing action of the arc-shaped plate 29, the cover body 11 connected to the bracket can be horizontally moved to a certain position. In this way, the first light source emitting head 12 can perform light source irradiation work within a circumferential range of different diameters. Moreover, since the first light source emitting head 12 can utilize the centrifugal force during rotation to push the first light source emitting head 12 to the initial position.

[0034] For the design of the bracket as a telescopic structure, it is a conventional technical means for those skilled in the art and is also obvious and conceivable in this field. Therefore, the present invention does not have corresponding drawings or corresponding reference numerals, but it does not affect the effective implementation of the technical solution of the present invention.

[0035] When both the bracket and the connecting member of the arc-shaped plate 29 are designed as fixed structures, the arc-shaped plate 29 can also play a role in protecting and guiding the cover body 11 on the first light source emitting head 12. However, the rotation trajectory of the first light source emitting head 12 is a fixed diameter circle. But through the design of the pushing mechanism of the arc-shaped plate 29 in the present invention, combined with the design of the bracket on the cover body 11 as a movable telescopic structure, the light irradiation range of the first light source emitting head 12 can be expanded, so as to obtain more transmittance test data at different position points.

[0036] In addition, the cover body 11 on the first light source emitting head 12 is provided in a cylindrical shape. In this way, when contacting the slope 30 on the arc-shaped plate 29, the contact area can be effectively enlarged. By enlarging the area, the acting pressure can be reduced, thereby reducing frictional damage and improving the service life of the device.

[0037] One end of the insertion rod 28 is connected to the side wall of the baffle 27 through a second spring 31, and both ends of the outer wall of the insertion rod 28 are provided with rollers 32 placed on the inner wall of the baffle 27. The center of the roller 32 moves on the inner wall of the baffle 27 through a rotating shaft, and a movable cavity connected to the roller 32 is formed between the inner wall of the baffle 27 and the insertion rod 28. The insertion rod 28 and the baffle 27 are kept vertically arranged, and an elastic pad is installed on the side wall of the baffle 27 near the second spring 31. The design of the roller 32 on the inner wall of the baffle 27 can reduce the friction resistance generated when the insertion rod 28 moves, thereby ensuring the free movement of the insertion rod 28.

[0038] Specifically, bases are fixedly installed around the bottom of the work frame 1, and the work frame 1 is provided with limit grooves connected to the bearing platform 2. The limit grooves on the work frame 1 mainly provide support points for the connection of the bearing platform 2 to prevent shaking and separation when subjected to external forces, thereby ensuring the stability of the connection of the structural parts.

[0039] A cleaning guide mechanism 21 is provided, and the gear plate 16 can drive the synchronous movement of the U-shaped rod 23 during the movement. During the movement of the U-shaped rod 23, on the one hand, the brush plate 26 can be driven to move back and forth, so that the upper surface of the liquid crystal light valve can be effectively cleaned by brush cleaning, thereby preventing dust particles from accumulating on the liquid crystal light valve and avoiding affecting the normal test work. On the other hand, during the movement of the U-shaped rod 23, the arc plate 29 on the plug rod 28 can be driven to move together. That is to say, when the rotation trajectory of the cover body 11 on the first light source emission head 12 is set in a ring shape, and the cover body 11 moves to the outer wall of the arc plate 29, the arc plate 29 also moves to the outer wall of the cover body 11 at the same time, which can play an effective protective guiding role, and the slope 30 provided on the arc plate 29 cooperates with the spring assembly, which can effectively buffer and adjust the resistance force of the cover body 11, prevent excessive force from causing large collision damage, and improve the service life and application effect of the device.

[0040] The above are only preferred specific implementation modes 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 according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0041] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-degree-of-freedom liquid crystal light valve transmittance test device based on a probe station, characterized in that, Comprising: A working frame (1), on which a carrying platform (2) is detachably installed, and a light source receiver connected to a liquid crystal light valve is provided on the carrying platform (2); A rotation testing mechanism (3), the rotation testing mechanism (3) includes an L-shaped bending plate fixed on the working frame (1), a cylinder (4) is fixedly installed at the bottom of the L-shaped bending plate, a lifting rod (5) is connected to the piston rod on the cylinder (4), a cam groove (6) is formed on the outer wall edge of the lifting rod (5), the cam groove (6) is in contact and fit with a protruding portion (8) on a rotating ring (7), an annular groove (9) is formed on the rotating ring (7), and one end of the annular groove (9) is fixedly connected to the L-shaped bending plate through a support ring (10), and the rotating ring (7) is connected to the support ring (10) in a rotatable manner; Both sides of the bottom end of the rotating ring (7) are provided with a cover body (11) through brackets, a first light source emitting head (12) adapted to the cover body (11) is installed at the bottom of the cover body (11), and the cover body (11) is arranged in a cylindrical shape.

2. The multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station according to claim 1, wherein Both ends of the piston rod on the cylinder (4) are connected to a slider (13) through a swing rod (14), the slider (13) is connected with a concave groove along the length direction of a fixing plate (15), and the bottom of the slider (13) is fixed on a gear plate (16), a rotating gear (18) fixed on a steering rod (17) is in meshing transmission with the bottom of the gear plate (16), and a rotating groove connected to the side wall of the fixing plate (15) is provided on the central axis of the rotating gear (18).

3. The multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station according to claim 2, wherein The central axis of the rotating gear (18) is connected with a second light source emitting head (20) through a fixing rod (19), a strip-shaped hole connected to the gear plate (16) is provided on the fixing plate (15), one end of the fixing plate (15) is fixed on the working frame (1) through a column, and both sides of the swing rod (14) are installed on the piston rod and the slider (13) of the cylinder (4) in a rotatable connection manner.

4. The multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station according to claim 3, characterized in that It further includes a cleaning and guiding mechanism (21), the cleaning and guiding mechanism (21) includes a push rod (22) fixed on the gear plate (16), one end of the push rod (22) is connected to a U-shaped rod (23), one end of the U-shaped rod (23) penetrates through a through hole on a support plate and extends to a moving frame (24), the center of the moving frame (24) is fixed on the support plate through a first spring (25), and one end of the moving frame (24) is connected with a brush plate (26) placed on the upper surface of the liquid crystal light valve through a mounting rod, the brush plate (26) is provided with bristles through a sticky fixing method, and the brush plate (26) is symmetrically arranged with respect to the center of the L-shaped bending plate.

5. The multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station according to claim 4, wherein A plug rod (28) is installed at the top end of the moving frame (24) through a baffle (27), a cavity of the light irradiation area on the second light source emitting head (20) is formed between the plug rods (28), the outer wall of the plug rod (28) is connected to an arc-shaped plate (29) through a plug-in installation method, a guiding groove connected to the cover body (11) is formed between the arc-shaped plates (29), and slopes (30) are integrally formed at both ends of the outer wall of the arc-shaped plate (29).

6. The multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station according to claim 5, wherein One end of the insertion rod (28) is connected to the side wall of the baffle (27) through a second spring (31), and rollers (32) are arranged at both ends of the outer wall of the insertion rod (28) on the inner wall of the baffle (27). The center of the roller (32) is movably arranged on the inner wall of the baffle (27) through a rotating shaft, and an activity cavity connected to the roller (32) is jointly formed between the inner wall of the baffle (27) and the insertion rod (28).

7. The multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station according to claim 6, wherein The insertion rod (28) and the baffle (27) are vertically arranged, and an elastic cushion block is installed on the second spring (31) close to the side wall of the baffle (27).

8. The multi-degree-of-freedom liquid crystal light valve transmittance testing device based on a probe station according to claim 1, wherein Bases are fixedly installed around the bottom end of the working frame (1), and a limiting groove connected to the bearing platform (2) is arranged on the working frame (1).

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