A device for adjusting a polarization measurement spectroscopic system

Abstract

The present invention relates to the technical field of astronomical instruments, and discloses an adjustment device for a polarization measurement spectroscopic system. There are three spectroscopic prisms in this device, and their function is to split the incident light into two linearly polarized lights with orthogonal polarization directions: P-polarized light and S-polarized light. There are certain spacing requirements for the placement of the prisms, and a certain angular correspondence relationship needs to be presented among the prisms during the placement process. This device covers the selective installation adjustment in three dimensions of pitching, rotation, and yaw of the three prisms. Only by adjusting precise screws can the angular correspondence relationship of the three spectroscopic prisms in space be found, and the device can maintain a stable spectroscopic effect under any observation attitude of the telescope without the need for translational adjustment for compensation. The present invention has the characteristics of a light structure, which can effectively reduce the unnecessary deflection caused by the overweight load of the telescope; the present invention adopts a hollow frame design, which is convenient for observation and debugging, has good structural rigidity, and can resist the deflection deformation that meets the optical requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of astronomical instruments, and particularly relates to an adjusting device for a polarization measurement spectroscopic system. Background Art

[0002] Radiation polarization remote sensing measurement is a conventional measurement method for the magnetic fields of celestial bodies such as the sun. The detection of the solar corona magnetic field is to analyze and invert the magnetic field information based on the radiation characteristics of the region, especially the polarization characteristics of the radiation. In the scientific research telescopes used in solar polarization research, the spectroscopic system is an essential part of the optical system. Usually, the rear-end system of the telescope divides the incident light into two parts: P-polarized light and S-polarized light, and then disperses the P-polarized light and S-polarized light respectively and collects the corresponding spectra. Usually, a calibration unit, a polarizer, an analyzer, etc. are also equipped in the whole set of scientific research equipment. As the source of P-polarized light and S-polarized light, the degree of linear polarization of the output light of this system has a great influence on the accuracy of data demodulation.

[0003] From an engineering perspective, in front of the spectroscopic system, a calibration unit, a modulation unit, etc. are equipped. On the two optical branches behind the spectroscopic system, imaging systems for their respective optical paths are equipped. Therefore, the incident light has requirements for both the incident angle and the axis passing for the spectroscopic system, that is, the incident light should enter from the geometric center at the very front end of the spectroscopic system, and after passing through the spectroscopic prism group, exit at the geometric center of their respective optical paths to ensure the convenience of debugging each subsystem. For the spectroscopic prism, although the incident light does not necessarily have to pass through the geometric center of the regular cube, considering the convenience of debugging, passing through the geometric center is the position where the debugging is most easily controlled. According to the optical design requirements, three spectroscopic prisms are arranged according to certain spacing requirements with the geometric center as a reference. When the optical path can pass through the geometric center of the prism, only the three rotation dimensions of the spectroscopic prism need to be adjusted to find the corresponding angles between them. Although the existing optical adjusting devices on the market can meet the rotation adjustment, such as the pitch adjustment stage, there are the following problems:

[0004] (1) It is difficult for the rotation center of the existing pitch adjustment stage of the product to fall on the geometric center of the prism regular cube. When the rotation center and the geometric center do not coincide, a translation stage needs to be introduced to eliminate the coupling phenomenon;

[0005] (2) Even if the rotation center of the existing pitch adjustment stage of the product coincides with the geometric center of the prism regular cube, due to the relatively thick pitch adjustment stage of the general existing product, the rotation radius is relatively large, which increases the volume and weight of the entire spectroscopic system, increases the load on the rear end of the telescope, and brings too much unnecessary deflection;

[0006] (3) The adjustment knob of the pitch adjustment table of the existing product is fixed. In the outer covering structure of the spectroscopic system, the adjustment position may be blocked, making it difficult to operate, and the manual adjustment effect is poor, causing a lot of trouble in debugging. Especially when the spectroscopic system is assembled on the telescope, if there is a problem with the optical path, disassembling and reassembling for reinspection will increase the workload and difficulty exponentially.

[0007] Therefore, a good design of the spectroscopic system should have the following characteristics:

[0008] (1) The structural dimensions are accurate;

[0009] (2) The spectroscopic prism only needs to be adjusted in three dimensions to complete the debugging;

[0010] (3) Since the entire spectroscopic system is hung at the rear end of the telescope, its volume and weight should be minimized to avoid introducing excessive bending;

[0011] (4) When the structural design is compact, the human factors and ergonomic performance of the debugging work and reinspection work should be considered. As an intermediate section among many subsystems at the rear end of the telescope, if there is a problem in the debugging of the large system after being assembled with the telescope, the spectroscopic system should have the characteristic of being able to complete the reinspection and debugging conveniently without disassembly.

[0012] (5) Since other subsystems need to be installed at the rear end of the spectroscopic system, the rigidity of the load-bearing structure should meet the requirements of the optical design. Summary of the Invention

[0013] The present invention provides an adjustment device for a polarization measurement spectroscopic system. The purpose of the present invention is to improve the human factors and ergonomic efficiency of the polarization measurement spectroscopic system and the convenience of later reinspection, reduce the deflection caused by the load at the rear end of the telescope. This device has good human factors and ergonomic performance in the prism debugging of the spectroscopic system, is easy to debug, has good rigidity, low weight and small volume after installation, and only needs to remove the cover plate to easily observe and achieve fine adjustment in the later reinspection work. Through actual work tests, the design of this device is effective.

[0014] The technical solution adopted by the present invention is:

[0015] An adjustment device for a polarization measurement spectroscopic system, which consists of a spectroscopic prism adjustment structure, a P-polarized light reflector, a light shield and an outer frame. The spectroscopic prism adjustment structure includes three spectroscopic prisms, a rotary adjustment cantilever, a prism fixing frame, a prism fixing lower cover, a yaw adjustment plate, an adjustment base, a tension screw group, steel balls, a pitch adjustment group, a rotary adjustment group, a yaw adjustment group, a cantilever tension spring and a yaw adjustment plate tension spring. The outer frame includes a frame and a frame cross beam;

[0016] The three spectroscopic prisms are divided into two groups. One spectroscopic prism is the first group, and the other two spectroscopic prisms are arranged side by side as the second group.

[0017] The incident light L is first split by the first beam-splitting prism to form P-polarized light and S-polarized light respectively. The P-polarized light and S-polarized light are then respectively passed through the second beam-splitting prisms on the left and rear sides of the first group of beam-splitting prisms to increase the polarization degree and then emitted. Among them, the light ray P needs to pass through a mirror to change the emission direction. Assuming the emission direction of the S-polarized light is the X direction, the incident light L is the Y direction, and the upward direction of the device is the Z direction, then the P-polarized light is emitted from the opposite direction of the X direction.

[0018] The light-shielding plate includes an upper light-shielding plate, a right light-shielding plate, a front light-shielding plate, a left light-shielding plate, a rear light-shielding plate, and a lower light-shielding plate.

[0019] The three beam-splitting prisms are clamped up and down by a prism fixing frame and a prism fixing lower cover, and fixed with a tension screw set; the prism fixing frame is fixedly adapted to the rotating adjustment cantilever through steel balls, a pitching adjustment group, a rotating adjustment group, and a cantilever tension spring; the rotating adjustment cantilever is fixed on the yaw adjustment plate by screws.

[0020] Both sides of the yaw adjustment plate are provided with arc-shaped edges that cooperate with the arc-shaped protrusions of the adjustment base to limit the arc-shaped sliding movement of the yaw adjustment plate and the adjustment base. After the yaw adjustment group and the yaw adjustment plate tension spring are adapted, they are fixed on the yaw adjustment plate and the adjustment base to achieve arc-shaped sliding adjustment.

[0021] The adjustment base, the P-polarized light mirror, the frame cross beam, the upper light-shielding plate, the right light-shielding plate, the front light-shielding plate, the left light-shielding plate, the rear light-shielding plate, and the lower light-shielding plate are fixed on the frame by screws.

[0022] When the prism fixing frame and the prism fixing lower cover wrap the beam-splitting prism, the incident surface, the reflection surface, and the transmission surface are all exposed.

[0023] At the position where the pitching adjustment group and the rotating adjustment group contact the rotating adjustment cantilever, the rotating adjustment cantilever is engraved with a 1.5-mm-deep equilateral right-angled triangle limit groove. The pitching adjustment group corresponds to the limit groove in the horizontal direction, and the rotating adjustment group corresponds to the limit groove in the vertical direction, ensuring that the pitching adjustment group and the rotating adjustment group avoid translational misalignment of the rotating adjustment cantilever and the prism fixing frame when screwing in and out.

[0024] The beam-splitting prism is provided with three adjustment modes: pitching, yawing, and rotating. The pitching adjustment group, the rotating adjustment group, and the yaw adjustment group cooperate through the cantilever tension spring and the yaw adjustment plate tension spring to realize the three-dimensional adjustment of the beam-splitting prism; the rotation centers of the three dimensions are all located at the geometric center of the cube of the prism.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. The three-dimensional rotation adjustment center of each beam splitting prism coincides with the geometric center of the beam splitting prism cube. When adjusting the rotation dimension, there will be no displacement change, and there is no need to introduce a displacement adjustment dimension, which greatly reduces the structural volume and weight of the prism adjustment, reduces the weight of the entire device, lightens the load of the telescope, and effectively reduces the deflection.

[0027] 2. The outer frame of the present invention adopts a hollow frame design. It only needs to fix the supporting socket structure of a single beam splitting prism at the bottom of the outer frame, which is convenient for installation. The hollow frame design has more operable space, is easy to start the adjustment work, has good ergonomic effects, the frame has a light self-weight and good rigidity.

[0028] 3. The prism through-axis adjustment feedback is sensitive. The adjustment of the present invention is delicate, has good optical feedback, and is easy to adjust.

[0029] 4. The structure of the present invention has good stability. Through actual work verification, with various attitude changes of the telescope during operation, the geometric relationship of the prism will not undergo optically detectable changes.

[0030] 5. The adjustment sequence of the present invention is reasonable. First, adjust the first group of beam splitting prisms to achieve rough through-axis, and then adjust the second group of beam splitting prisms for fine through-axis. The entire debugging work is very easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of the present invention;

[0033] Figure 2 It is an exploded schematic diagram of the present invention;

[0034] Figure 3 It is a side view of the present invention;

[0035] Figure 4 It is a front view of the present invention;

[0036] Figure 5 It is a schematic diagram of the circular arc sliding movement of the yaw adjustment plate and the adjustment base of the present invention.

[0037] Reference numerals:

[0038] 1-1 Beam splitter prism; 1-2 Rotary adjustment cantilever; 1-3 Prism fixing frame; 1-4 Prism fixing lower cover; 1-5 Yaw adjustment plate; 1-6 Adjustment base; 1-7 Tightening screw set; 1-8 Steel ball; 1-9 Pitch adjustment group; 1-10 Rotary adjustment group; 1-11 Yaw adjustment group; 1-12 Cantilever tension spring; 1-13 Yaw adjustment plate tension spring; 2P Polarized light reflector; 3-1 Frame; 3-2 Frame cross beam; 4-1 Upper light shield; 4-2 Right light shield; 4-3 Front light shield; 4-4 Left light shield; 4-5 Rear light shield; 4-6 Lower light shield. Detailed implementation manners

[0039] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details.

[0040] The beam splitter prism adopted in the present invention belongs to a polarization beam splitter prism (PBS), which can split a beam of incident light into two beams of light with perpendicular propagation directions and both being linearly polarized, and the linear polarization directions of the two beams of light are perpendicular to each other. This kind of beam splitter prism is usually composed of the hypotenuses of two equilateral right triangular prisms glued together, and a polarization beam splitting film is plated on the glued hypotenuse. The P-polarized light (polarized light parallel to the incident plane) in the incident light is transmitted, while the S-polarized light (polarized light perpendicular to the incident plane) is reflected. Since there is a certain transmittance in the polarization beam splitter prism: that is, there will also be a certain amount of S-polarized light transmitted in the direction of the P-polarized light, which results in the linear polarization degrees of the P-polarized light and the S-polarized light not being high enough when the incident light only passes through one beam splitter prism. In order to meet the scientific research requirements, a second beam splitter prism is added behind the transmission of the first beam splitter prism and to the left of the reflection to further improve the linear polarization degrees of the P-polarized light and the S-polarized light, thereby improving the data accuracy.

[0041] As Figures 1 to 4As shown in the figure, this embodiment provides a polarization measurement spectroscopic system adjustment device, which is composed of a spectroscopic prism adjustment structure, a P-polarized light mirror 2, a light shield, and an outer frame. The spectroscopic prism adjustment structure includes three spectroscopic prisms 1-1, a rotation adjustment cantilever 1-2, a prism fixing frame 1-3, a prism fixing lower cover 1-4, a yaw adjustment plate 1-5, an adjustment base 1-6, a tension screw set 1-7, steel balls 1-8, a pitch adjustment set 1-9, a rotation adjustment set 1-10, a yaw adjustment set 1-11, a cantilever tension spring 1-12, and a yaw adjustment plate tension spring 1-13. The outer frame includes a frame 3-1 and a frame cross beam 3-2. The three spectroscopic prisms 1-1 are divided into two groups. One spectroscopic prism is the first group, and the other two spectroscopic prisms 1-1 are arranged side by side as the second group. The incident light L is first split by the first spectroscopic prism to form P-polarized light and S-polarized light respectively. The P-polarized light and S-polarized light then pass through the second group of spectroscopic prisms on the left and rear sides of the first group of spectroscopic prisms respectively to improve the polarization degree and then are emitted. Among them, the light P needs to pass through a mirror to change the emission direction. Assuming the emission direction of the S-polarized light is the X direction, the incident light L is the Y direction, and the upward direction of the device is the Z direction, then the P-polarized light is emitted from the opposite direction of the X direction.

[0042] The light shield includes an upper light shield 4-1, a right light shield 4-2, a front light shield 4-3, a left light shield 4-4, a rear light shield 4-5, and a lower light shield 4-6.

[0043] The three spectroscopic prisms 1-1 are clamped up and down by the prism fixing frame 1-3 and the prism fixing lower cover 1-4, and are fixed by the tension screw set 1-7. The prism fixing frame 1-3 is fixed to the rotation adjustment cantilever 1-2 in a matching manner through the steel balls 1-8, the pitch adjustment set 1-9, the rotation adjustment set 1-10, and the cantilever tension spring 1-12. The rotation adjustment cantilever 1-2 is fixed to the yaw adjustment plate 1-5 by screws.

[0044] As Figure 5 As shown in the figure, the two sides of the yaw adjustment plate 1-5 are provided with arc-shaped edges that cooperate with the arc-shaped protrusions of the adjustment base 1-6 to limit the arc sliding movement of the yaw adjustment plate 1-5 and the adjustment base 1-6. After the yaw adjustment set 1-11 and the yaw adjustment plate tension spring 1-13 are matched, they are fixed on the yaw adjustment plate 1-5 and the adjustment base 1-6 to achieve sliding adjustment within the arc.

[0045] The adjustment base 1-6, the P-polarized light mirror 2, the frame cross beam 3-2, the upper light shield 4-1, the right light shield 4-2, the front light shield 4-3, the left light shield 4-4, the rear light shield 4-5, and the lower light shield 4-6 are fixed to the frame 3-1 by screws.

[0046] When the prism fixing frame 1-3 and the lower prism fixing cover 1-4 wrap the beam splitting prism 1-1, the incident surface, the reflection surface and the transmission surface are all exposed.

[0047] At the positions where the pitching adjustment group 1-9 and the rotation adjustment group 1-10 contact the rotation adjustment cantilever 1-2, the rotation adjustment cantilever 1-2 is engraved with a limit groove in the shape of an equilateral right triangle with a depth of 1.5 mm. The pitching adjustment group 1-9 corresponds to the limit groove in the horizontal direction, and the rotation adjustment group 1-10 corresponds to the limit groove in the vertical direction, ensuring that when the pitching adjustment group 1-9 and the rotation adjustment group 1-10 are screwed in and out, the rotation adjustment cantilever 1-2 and the prism fixing frame 1-3 are prevented from shifting horizontally;

[0048] When the yaw adjustment group 1-11 is screwed in and out, it is not limited by the limit groove on the adjustment base 1-6.

[0049] The beam splitting prism 1-1 is provided with three adjustment modes: pitching, yaw and rotation. The pitching adjustment group 1-9, the rotation adjustment group 1-10 and the yaw adjustment group 1-11 cooperate through the cantilever tension spring 1-12 and the yaw adjustment plate tension spring 1-13 to realize the adjustment of the beam splitting prism in three dimensions; the rotation centers of the three dimensions are all located at the geometric center of the cube of the prism.

[0050] The adjustment of the beam splitting system is divided into three steps:

[0051] 1. Adjustment of the first group of prisms and rough shaft penetration; 2. Adjustment of the second group of prisms and fine shaft penetration; 3. Detection and re-measurement of the installed telescope:

[0052] 1. Adjustment of the first prism and rough shaft penetration:

[0053] First, erect the fixed frame 3-1 in the laboratory, erect the point laser light source, and confirm that the laser light source passes through the geometric center of the circular flange surface at the incident end of the frame 3-1 and is perpendicular to it;

[0054] Confirm the geometric direction of the first beam splitting prism 1-1. The inclined surface of the first beam splitting prism 1-1 needs to face the circular flange surface at the incident end of the frame 31 and the circular flange surface at the S-polarized light output end. Install the first beam splitting prism 1-1 and its adjustment structure in the frame 31 and fix them. Pull the crosshairs on the circular flange surface at the incident end of the frame 3-1, the square flange surface at the P-polarized light output end, and the circular flange surface of the S-polarized light, so that the corresponding crosshair intersections are located at the geometric centers of the circular flange surface at the incident end, the circular flange surface of the S-polarized light, and the square flange at the P-polarized light output end.

[0055] Rotate the pitching adjustment group 1-9, the rotation adjustment group 1-10, and the yaw adjustment group 1-11 to make the incident light pass through the intersection of the crosshairs on the incident end circular flange; due to the error caused by the beam splitter prism 1-1, the angle between the P-polarized light and the S-polarized light is not necessarily 90°. At this time, when adjusting the yaw adjustment group 1-11, the distances between the outgoing light of the P-polarized light and the intersection of the square flange surface and the outgoing light of the S-polarized light and the intersection of the circular flange surface should be comprehensively observed. When the two distances are equal, it means that the offset conditions of the outgoing light of the P-polarized light and the S-polarized light from the geometric center of the corresponding flange surface are basically the same, and the rough shaft penetration is completed.

[0056] (2) Adjustment of the second group of prisms and fine shaft penetration

[0057] Confirm the geometric direction of the second beam splitter prism 11. The orientation of the beam splitter prism in the P-polarized light direction is the same as that of the first beam splitter prism 1-1, but it should be noted that its adjustment structure needs to be installed with a dislocation to avoid interference with the first prism and its structure. The inclined surface of the beam splitter prism 1-1 in the S-polarized light direction needs to face both the first beam splitter prism and the lower part of the frame 3-1 at the same time. Install the second beam splitter prism 11 and its adjustment structure in the frame 31 and fix them. Then adjust the pitching adjustment group 1-9 and the rotation adjustment group 1-10 respectively to make the intersection of the outgoing light of the P-polarized light and the square flange surface coincide, and the intersection of the outgoing light of the S-polarized light and the circular flange surface coincide, that is, the fine shaft penetration is completed.

[0058] (3) Detection and reinspection of the installed telescope

[0059] Completing the fine shaft penetration does not indicate the linear polarization degree and extinction ratio of the outgoing P-polarized light and S-polarized light. Detect them respectively outside the outgoing end of the P-polarized light and the outgoing end of the S-polarized light of the frame 3-1. When the linear polarization degree and extinction ratio are not ideal, adjust the respective yaw adjustment groups 1-11 of the second group of beam splitter prisms to make the outgoing P-polarized light and S-polarized light have similar extinction ratios and linear polarization degrees, and the perpendicularity of the polarization directions of the two groups of light is good, that is, the detection work is completed.

[0060] Set the beam splitting system at the rear end of the telescope and cover the light shield 4-1, the right light shield 4-2, the front light shield 4-3, the left light shield 4-4, the rear light shield 4-5 and the lower light shield 4-6. Since the shaft penetration debugging in the laboratory only targets the beam splitting system itself and the shaft penetration distance is short, the overall system long shaft penetration performance at the rear end of the telescope is the judgment basis for reinspecting the actual situation of the beam splitting system in the entire telescope rear-end system. If the shaft penetration of each system has been completed well in the laboratory debugging, then even if there is a certain offset difference in the shaft penetration of the beam splitting system, this value will be very small, and only by finely adjusting the pitching adjustment group 1-9 and the rotation adjustment group 1-10 of the second group of beam splitter prisms can the correction be achieved, without the need to disassemble and return to the laboratory for re-debugging.

[0061] There are three beam-splitting prisms in this device, whose function is to split the incident light into two linearly polarized lights with orthogonal polarization directions: P-polarized light and S-polarized light. There are certain spacing requirements for the placement of the prisms. Due to the uncertainty brought by prism production, the prisms need to present a certain angular correspondence relationship with each other during the placement process. This device covers the selection and adjustment of the pitch, yaw, and rotation of the three prisms in three dimensions. Only by adjusting the precision screws can the angular correspondence relationship of the three prisms in space be found, and the device can maintain a stable beam-splitting effect at any observation attitude of the telescope without the need for translational adjustment for compensation.

[0062] This embodiment is applicable to scientific research telescope equipment related to polarization research. It has the characteristics of light weight. In the working scenario, it is installed at the rear end of the telescope, which can effectively reduce the unnecessary deflection caused by the overweight load of the telescope; during the debugging process, since the present invention moves the adjustment rotation center to the center of the prism, it has the characteristics of small structural volume and less occupied space; the present invention adopts a hollow frame design, with good observability and human factors performance during debugging. When there is a problem with the telescope debugging and it is necessary to observe the beam-splitting system, only the baffle needs to be removed to make a quick and accurate judgment; during the observation process, the structure has good rigidity and can resist the deflection deformation that meets the optical requirements.

[0063] The working principle of the present invention is:

[0064] By adjusting the pitch adjustment group, the nodding - pitch rotation adjustment of the beam-splitting prism can be achieved; by adjusting the rotation adjustment group, the shaking - rotation rotation adjustment of the beam-splitting prism can be achieved; by adjusting the yaw adjustment group, the swinging - yaw adjustment of the beam-splitting prism can be achieved; for a single prism, the corresponding coordinates are X, Y, and Z, and the corresponding rotation dimensions are as follows: the pitch adjustment is a rotation around the Y-axis and rotates on the XZ plane;

[0065] Rotation: Rotation around the Z-axis and rotates on the XY plane, yaw: Rotation around the X-axis and rotates on the YZ plane; First, adjust the three-dimensional rotation adjustment of the first group of beam-splitting prisms to achieve the rough passing of the incident light through the axis and the P-polarized light and S-polarized light through the axis, and then install the second group of beam-splitting prisms respectively and adjust their three-dimensional rotations to achieve the fine passing of the P-polarized light and S-polarized light through the axis.

[0066] The unit described as a separate component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0067] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A device for adjusting a polarization measurement spectroscopic system, characterized in that: The invention is composed of a beam splitter prism adjustment structure and a P polarized light reflector (2), a light shielding plate and an outer frame. The beam splitter prism adjustment structure comprises three beam splitter prisms (1-1), a rotation adjustment cantilever (1-2), a prism fixing frame (1-3), a prism fixing lower cover (1-4), a yaw adjustment plate (1-5), an adjustment base (1-6), a tightening screw group (1-7), a steel ball (1-8), a pitch adjustment group (1-9), a rotation adjustment group (1-10), a yaw adjustment group (1-11), a cantilever tightening spring (1-12) and a yaw adjustment plate tightening spring (1-13); the outer frame comprises a frame (3-1) and a frame crossbeam (3-2); The three beam splitter prisms (1-1) are divided into two groups, one beam splitter prism is a first group, and the other two beam splitter prisms are arranged side by side as a second group. The incident light L first passes through the first group splitting prism to form P polarized light and S polarized light respectively. The P polarized light and S polarized light then pass through the second group splitting prisms on the left and rear sides of the first group splitting prism respectively to increase the polarization degree before being emitted. The P polarized light changes its emission direction after passing through a primary reflector. The emission direction of the S polarized light is set to the X direction, the incident light L is set to the Y direction, and the upward direction of the device is set to the Z direction, then the P polarized light is emitted from the opposite direction of the X direction; The three beam splitting prisms (1-1) are clamped together by a prism fixing frame (1-3) and a prism fixing lower cover (1-4), and fixed by a tightening screw group (1-7); the prism fixing frame (1-3) is adapted and fixed on the rotation adjustment cantilever (1-2) by a steel ball (1-8), a pitch adjustment group (1-9), a rotation adjustment group (1-10) and a cantilever tension spring (1-12); the rotation adjustment cantilever (1-2) is fixed on the yaw adjustment plate (1-5) by screws; The deflection adjustment plate (1-5) is provided with arc-shaped edges on both sides thereof, which cooperate with the arc-shaped protrusions of the adjustment base (1-6) to perform limited arc sliding motion on the deflection adjustment plate (1-5) and the adjustment base (1-6); the deflection adjustment group (1-11) and the deflection adjustment plate tension spring (1-13) are matched and fixed on the deflection adjustment plate (1-5) and the adjustment base (1-6) to achieve arc sliding adjustment; The pitch adjustment group (1-9) and the rotation adjustment group (1-10) are located at positions where the rotation adjustment cantilever (1-2) contacts; the rotation adjustment cantilever (1-2) is engraved with a 1.5 mm deep equilateral right triangle limiting groove; the pitch adjustment group (1-9) corresponds to the limiting groove in the horizontal direction; and the rotation adjustment group (1-10) corresponds to the limiting groove in the vertical direction, so as to ensure that when the pitch adjustment group (1-9) and the rotation adjustment group (1-10) are rotated in and out, translational displacement of the rotation adjustment cantilever (1-2) and the prism fixing frame (1-3) is avoided; The beam splitting prism (1-1) is provided with three adjustment modes: pitching, yawing and rotating. The pitching adjustment group (1-9), the rotating adjustment group (1-10) and the yawing adjustment group (1-11) cooperate through the cantilever tension spring (1-12) and the yawing adjustment plate tension spring (1-13) to achieve the adjustment of the beam splitting prism in three dimensions; the rotation centers of the three dimensions are all located at the geometric center of the cube of the prism.

2. The adjustment device for a polarization measurement and spectroscopic system according to claim 1, wherein: The light shield includes an upper light shield (4-1), a right light shield (4-2), a front light shield (4-3), a left light shield (4-4), a rear light shield (4-5) and a lower light shield (4-6).

3. The adjustment device for a polarization measurement spectroscopic system according to claim 1, wherein: The adjustment base (1-6), the P-polarized light reflector (2), the frame cross beam (3-2), the upper light shield (4-1), the right light shield (4-2), the front light shield (4-3), the left light shield (4-4), the rear light shield (4-5) and the lower light shield (4-6) are fixed to the frame (3-1) by screws.

4. The adjustment device for a polarization measurement spectroscopic system according to claim 1, wherein: When the prism fixing frame (1-3) and the prism fixing lower cover (1-4) wrap the beam splitting prism (1-1), the incident surface, the reflection surface and the transmission surface are all exposed.

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