A micro-stress support structure for a curved prism and its alignment method

Abstract

The present invention provides a micro-stress support structure for a curved prism and an alignment method thereof, which are used to solve the technical problems that the curved prism is not easy to install and fix, and its surface shape is easily affected by assembly stress. The micro-stress support structure of the present invention includes a curved prism frame, two prism bonding pillar groups, two prism bonding support plates, and two groups of glue layer thickness control structures; a plurality of glue injection holes are formed on the end surface of the prism bonding support plate; through grooves are respectively formed on the side walls on both sides of the curved prism frame, and one end of the bonding support plate is embedded in the through groove and the bonding support plate is bonded to the curved prism to be adjusted by injecting glue into the glue injection holes; through holes are formed on the top side wall and the bottom side wall of the curved prism frame, and the prism bonding pillar groups are bonded to the curved prism to be adjusted through the through holes; each group of glue layer thickness control structures is used to extrude the bonding glue in the glue injection holes to realize the adjustment of the thickness of the injected glue layer, and further realize the micro-stress support with high surface shape accuracy and high force and thermal stability of the curved prism.

Description

Technical Field

[0001] The present invention relates to a curved prism, and in particular to a micro-stress support structure for a curved prism and an alignment method thereof. Background Art

[0002] A curved prism is a prism structure proposed by Féry.C.H in 1911. Based on the Rowland circle principle, it consists of two spherical working surfaces with large surface inclination angles. Therefore, it has both spectroscopic and imaging capabilities. When applied to a spectral system, it can greatly simplify the structure of the system. However, as a non-rotationally symmetric part, the curved prism has the problem of being difficult to clamp.

[0003] Chinese Patent CN 103116211 A discloses a retaining ring fixing method based on an inclined washer. During the optical processing of the curved prism, one of the convex working surfaces is made coaxial with the outer circle of the prism, and the other concave working surface is milled to have an inclined flat end face for installation. After installation, a lever is used to adjust the phase of the curved prism. Since this method requires the curved prism to be processed with an inclined installation flat end face, the material needs to retain an extra volume. In addition, in order to ensure reliable contact between the inclined washer and the inclined plane of the curved prism, the processing accuracy requirements for the inclined washer are also greatly improved.

[0004] Chinese Patent CN108037558A discloses a fixing method based on a positioning block and a threaded retaining ring. During the optical processing of the curved prism, a stepped chamfer and a phase positioning flat end face are processed on its outer circle. The phase of the curved prism is determined by the positioning block, and the prism is fixed by pressing the threaded retaining ring against the outer circle chamfer. Since this method requires the curved prism to be processed with an outer circle stepped chamfer and requires the stepped surface to be perpendicular to the concave optical axis of the curved prism, the processing difficulty of the prism increases. At the same time, direct pressing by the retaining ring is also likely to cause the prism to deform and fail to meet the usage requirements of the optical system. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problems that the curved prism is not easy to install and fix, and its surface shape is easily affected by assembly stress, and to provide a micro-stress support structure for a curved prism and an alignment method thereof.

[0006] In order to achieve the above purpose, the technical solution of the present invention is as follows:

[0007] A micro-stress support structure for a curved prism is characterized in that it includes a curved prism frame, two prism bonding pillar groups, two prism bonding support plates, and two groups of glue layer thickness control structures;

[0008] The curved prism frame is used to install the curved prism to be adjusted;

[0009] The end faces of the two prism bonding pillar groups are used to be bonded to the top side wall and the bottom side wall of the curved prism frame respectively; the end faces of the two prism bonding support plates are used to be bonded to the side walls on both sides of the curved prism frame;

[0010] A plurality of glue injection holes are formed in the end face of the bonding support plate;

[0011] Through grooves are respectively formed in the side walls on both sides of the curved prism frame at positions corresponding to the glue injection holes, and through holes are formed in the top side wall and the bottom side wall corresponding to the prism bonding pillar groups, for realizing the bonding between the to-be-adjusted curved prism and the inner side wall of the curved prism frame through the glue injection holes and the through grooves; the prism bonding pillar groups are used to be bonded to the to-be-adjusted curved prism through the through holes;

[0012] Each group of the glue layer thickness control structures includes a plurality of glue layer thickness control blocks; one end of the glue layer thickness control block is inserted into the corresponding glue injection hole from the side far away from the curved prism frame, and presses the bonding glue in the glue injection hole, for realizing the adjustment of the thickness of the injected glue layer.

[0013] Furthermore, glue injection bosses are arranged at positions corresponding to the glue injection holes on the end face of the prism bonding support plate, for ensuring the bonding area between the to-be-adjusted curved prism and the prism bonding support plate through the glue injection bosses;

[0014] Overflow holes communicated with the glue injection holes are arranged on the side wall of the prism bonding support plate, for overflowing the redundant bonding glue.

[0015] Furthermore, a first trimming pad is arranged between the curved prism frame and the prism bonding support plate, for adjusting the gap between the prism bonding support plate and the to-be-adjusted curved prism;

[0016] The prism bonding pillar group includes two prism bonding pillars; one end of the prism bonding pillar is used to pass through the through hole to be bonded to the to-be-adjusted curved prism;

[0017] A second trimming pad is arranged between the curved prism frame and the prism bonding pillar, for adjusting the gap between the prism bonding pillar and the to-be-adjusted curved prism.

[0018] Furthermore, a dowel pin is further included;

[0019] Dowel pin holes are formed in the prism bonding support plate, and the dowel pin passes through the dowel pin holes to be connected to the outer side wall of the curved prism frame, for fixing the relative positions of the prism bonding support plate and the curved prism frame.

[0020] Furthermore, the prism bonding support plate includes a plurality of bonding blocks and a stress release flexible structure connecting adjacent two bonding blocks;

[0021] The glue injection holes, the corresponding glue injection bosses and the overflow holes are located on the corresponding bonding blocks;

[0022] The stress release flexible structure is used to release the curing stress, assembly stress and residual stress caused by temperature change of the adhesive.

[0023] Furthermore, the first trimming pad is made of a metal rubber pad.

[0024] Furthermore, a gap of 0.1 mm - 0.15 mm is reserved between the inner wall of the curved surface prism frame and the outer wall of the curved surface prism to be adjusted.

[0025] Based on the above micro-stress support structure for a curved surface prism, the present invention also provides an alignment method for the micro-stress support structure of a curved surface prism, which is characterized in that it includes the following steps:

[0026] 1] Install the curved surface prism to be adjusted

[0027] Coaxially install the curved surface prism to be adjusted in the curved surface prism frame, and complete the positioning and preliminary fixing of the curved surface prism to be adjusted through the prism gluing support pillar group and the feeler gauge;

[0028] 2] Realize the bonding of the prism gluing support plate

[0029] 2.1] Install the prism gluing support plate on the curved surface prism frame, and after adjusting the phase of the curved surface prism according to the design requirements, inject the adhesive into the glue injection hole of the prism gluing support plate, and make the adhesive contact the side wall of the curved surface prism to be adjusted through the through groove;

[0030] 2.2] Respectively insert the thickness control blocks on the glue layer thickness control structure into the glue injection holes from the side far away from the curved surface prism frame to realize the control of the glue layer thickness;

[0031] 3] After the glue layer is cured, perform auxiliary bonding and fixing on the prism gluing support pillar group and the curved surface prism;

[0032] 4] After standing for 24 hours, the alignment is completed.

[0033] Furthermore, step 1] is specifically:

[0034] Coaxially install the curved surface prism to be adjusted in the curved surface prism frame, and complete the position adjustment of the curved surface prism to be adjusted in the curved surface prism frame through the feeler gauge; then make one end of the prism gluing support pillar pass through the second trimming pad and the through hole and abut against the side wall of the curved surface prism to be adjusted to complete the positioning and preliminary fixing of the curved surface prism to be adjusted;

[0035] Step 2.1] is specifically:

[0036] When installing the prism bonding support plate on the curved prism frame, insert the pin through the pin hole to connect with the outer side wall of the curved prism frame, so as to fix the relative position between the prism bonding support plate and the curved prism frame; then set the first trimming pad at the installation connection between the prism bonding support plate and the curved prism frame, and adjust the gap between the prism bonding support plate and the curved prism to be adjusted through the first trimming pad; after adjusting the phase of the curved prism according to the design requirements, inject epoxy glue into the glue injection hole of the prism bonding support plate, and make the epoxy glue contact with the side wall of the curved prism to be adjusted.

[0037] Further, in step 3], before the prism bonding support pillar group is adhesively fixed to the curved prism as an auxiliary, it further includes:

[0038] Remove the prism bonding support pillar and the second trimming pad, and adjust the thickness of the second trimming pad so that the gap between the prism bonding support pillar and the curved prism to be adjusted is 0.1 mm;

[0039] The specific operation of adhesively fixing the prism bonding support pillar group to the curved prism as an auxiliary is as follows:

[0040] Apply silicone rubber on the end face of the prism bonding support pillar near the curved prism frame, and make one end of the prism bonding support pillar pass through the second trimming pad and the through hole with the silicone rubber and contact with the side wall of the curved prism to be adjusted, so as to realize the auxiliary adhesive fixation of the curved prism to be adjusted.

[0041] The beneficial effects of the present invention compared with the prior art are as follows:

[0042] 1. A micro-stress support structure for a curved prism provided by the present invention bonds the prism bonding support plate and the prism bonding support pillar on the curved prism frame, and realizes the micro-stress support with high surface form accuracy and high force and thermal stability of the curved prism through multiple glue injection holes arranged on the bonding support plate. Its structure is simple, easy to implement, and is suitable for the high-stability micro-stress support of optical elements such as reflectors, prisms, and gratings.

[0043] 2. A micro-stress support structure for a curved prism provided by the present invention is provided with a glue injection boss on the end face of the prism bonding block near the curved prism frame and corresponding to the glue injection hole, which is used to ensure the bonding area between the curved prism to be adjusted and the prism bonding block through the glue injection boss; an overflow hole communicating with the glue injection hole is arranged on the side wall of the prism bonding support plate, which is used to overflow the excess epoxy glue to ensure the bonding strength of the epoxy glue and the force and thermal stability of the curved prism assembly.

[0044] 3. A micro-stress support structure for a curved prism provided by the present invention realizes the gap adjustment between the prism bonding support plate and the curved prism to be adjusted and between the prism bonding support pillar and the curved prism to be adjusted through the first trimming pad and the second trimming pad, thereby improving the surface form accuracy of the curved prism.

[0045] 4. The micro-stress support structure of a curved prism provided by the present invention fixes the relative positions of the prism bonding support plate and the curved prism frame through pins to ensure the accuracy of the bonding position of the to-be-adjusted curved prism.

[0046] 5. The micro-stress support structure of a curved prism provided by the present invention is provided with a stress release flexible structure between two bonding blocks, which is convenient for releasing the bonding stress, assembly stress and residual stress caused by temperature change, so as to ensure the high-stability support of the to-be-adjusted curved prism.

[0047] 6. The micro-stress support structure of a curved prism provided by the present invention uses a metal rubber pad as the first trimming pad to improve the force and thermal stability after the to-be-adjusted curved prism is fixed.

[0048] 7. The alignment and adjustment method of the micro-stress support structure of a curved prism provided by the present invention adopts a two-step fixing method for the bonding and fixing of the to-be-adjusted curved prism with the prism bonding support plate and the prism bonding support pillar. After the position adjustment of the to-be-adjusted curved prism meets the design requirements, first use four groups of prism bonding support pillars to fix the prism, then install the prism bonding support plate and complete the injection and bonding. After the glue on both sides is cured, remove the prism bonding support pillars, readjust the gap and then install the prism bonding support pillars and perform bonding. Through the two-step fixing method, the micro-stress clamping of the curved prism is realized. At the same time, the alignment and adjustment method of the present invention can ensure the attitude angle of the curved prism during bonding and reduce the alignment and adjustment difficulty of system integration.

[0049] 8. The alignment and adjustment method of the micro-stress support structure of a curved prism provided by the present invention further realizes the gap adjustment between the prism bonding support plate and the to-be-adjusted curved prism, and between the prism bonding support pillar and the to-be-adjusted curved prism through the first trimming pad and the second trimming pad, so as to improve the surface shape accuracy of the curved prism; at the same time, epoxy glue is used between the horizontal side walls of the prism bonding support plate and the to-be-adjusted curved prism, and effective bonding is realized through the strong adhesive force of the epoxy glue. Silicone rubber is used between the vertical side walls of the prism bonding support pillar and the to-be-adjusted curved prism to reduce the influence of bonding on the to-be-adjusted curved prism. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic exploded view of an embodiment of the micro-stress support structure of a curved prism of the present invention;

[0051] Figure 2 is a schematic structural view of the prism bonding support plate in the embodiment of the present invention Figure 1 ;

[0052] Figure 3 is a schematic structural view of the prism bonding support plate in the embodiment of the present invention Figure 2 ;

[0053] Figure 4 This is a schematic diagram of the split structure of the prism gluing support plate and the glue layer thickness control block in the embodiment of the present invention.

[0054] The specific reference numerals are as follows:

[0055] 1 - Curved surface prism frame; 2 - Glue layer thickness control structure, 21 - Glue layer thickness control block, 211 - Second-order convex platform, 212 - First mounting hole of the control block;

[0056] 3 - Prism gluing support plate, 31 - Glue injection hole, 32 - Glue injection boss, 33 - Glue overflow hole, 34 - Pin hole, 35 - Gluing block, 36 - Stress release flexible structure, 37 - Mounting hole, 38 - Second mounting hole of the control block;

[0057] 4 - First trimming pad; 5 - Pin; 6 - Prism gluing support column; 7 - Second trimming pad. Specific embodiments

[0058] To make the advantages and features of the present invention clearer, the following further details the present invention with reference to the accompanying drawings and specific embodiments.

[0059] As Figure 1 shown, a micro-stress support structure for a curved surface prism includes a curved surface prism frame 1, four prism gluing support columns 6, two prism gluing support plates 3, two groups of glue layer thickness control structures 2, four pins 5, four first trimming pads 4, and four second trimming pads 7. In this embodiment, the curved surface prism frame 1 is a rectangular frame for installing the rectangular curved surface prism to be adjusted; a gap of 0.1 mm - 0.15 mm is reserved between the inner wall of the curved surface prism frame 1 and the outer wall of the curved surface prism to be adjusted, so as to ensure that the curved surface prism to be adjusted is in a free state in the inner cavity of the curved surface prism frame 1, facilitating subsequent adjustment of the coaxiality between the curved surface prism to be adjusted and the curved surface prism frame 1. The four prism gluing support columns 6 are divided into two groups and are respectively connected to the top side wall and the bottom side wall of the curved surface prism frame 1, and the two prism gluing support plates 3 are respectively connected to the side walls on both sides of the curved surface prism frame 1. The present invention preliminarily positions the curved surface prism to be adjusted by arranging two groups of prism gluing support columns 6 on the upper and lower side walls in the vertical direction of the curved surface prism frame 1, so that the upper side and the lower side of the curved surface prism to be adjusted are completely symmetric during installation, ensuring that the curved surface prism to be adjusted is evenly stressed, thereby reducing the influence of the support structure on its surface shape.

[0060] As Figure 2 、 Figure 3As shown in the figure, in this embodiment, the prism bonding support plate 3 includes connecting plates at both ends, and six bonding blocks 35 and stress release flexible structures 36 located between the two connecting plates. Mounting holes 37 and pin holes 34 are provided on the connecting plates; the mounting holes 37 are used to mount the prism bonding support plate 3 on the curved prism frame 1; the pin 5 passes through the pin hole 34 and is connected to the outer side wall of the curved prism frame 1 to fix the relative position of the prism bonding support plate 3 and the curved prism frame 1 when the prism bonding support plate 3 is mounted, so as to ensure the accuracy of the bonding position of the to-be-adjusted curved prism, and further ensure the reliability of bonding. In this embodiment, two glue injection holes 31 are provided on the end face of the bonding block 35, through grooves are respectively provided on the side walls of both sides of the curved prism frame 1 corresponding to the position of the bonding support plate 3, and one end of the bonding support plate 3 is embedded in the through groove and the bonding support plate 3 is bonded to the to-be-adjusted curved prism by injecting glue into the glue injection holes 31. Through holes are provided on the top side wall and the bottom side wall of the curved prism frame 1 corresponding to the position of the prism bonding support post 6, and the prism bonding support post group is bonded to the to-be-adjusted curved prism through the above through holes. Preferably, glue injection bosses 32 are provided on the end face of the bonding block 35 corresponding to the glue injection holes 31 to ensure the bonding area between the to-be-adjusted curved prism and the prism bonding support plate 3 through the glue injection bosses 32. Glue overflow holes 33 communicating with the glue injection holes 31 are provided on the side wall of the prism bonding support plate 3 to overflow the excess epoxy glue. The stress release flexible structure 36 is used for the connection between two adjacent bonding blocks 35 and the connection between the bonding blocks 35 at both ends and the corresponding connecting plates, and can release the curing stress, assembly stress and residual stress caused by temperature change of the epoxy glue through the stress release flexible structure 36; during design, the stress release flexible structure 36 needs to use the finite element analysis and simulation method to perform iterative optimization of the structural parameters.

[0061] As Figure 4 shown in the figure, in this embodiment, each group of glue layer thickness control structures 2 includes 6 glue layer thickness control blocks 21. One end of the glue layer thickness control block 21 is provided with a second-order boss 211, and its size is designed according to the size of the glue injection hole 31 and the glue injection boss 32 communicating with the glue injection hole 31. Control block first mounting holes 212 are provided on both sides of the glue layer thickness control block 21, and corresponding control block second mounting holes 38 are provided on the stress release flexible structure 36 for fixing the glue layer thickness control block 2 to the prism bonding support plate 3. During installation and adjustment, after the prism bonding support plate 3 is mounted on the curved prism frame 1, first inject epoxy glue through 12 glue injection holes 31, then install 6 independent glue layer thickness control blocks 21, and insert the second-order bosses 211 on the glue layer thickness control blocks 21 into the glue injection holes 31 from the side away from the curved prism frame 1 to extrude the epoxy glue in the glue injection holes 31, and adjust the thickness of the injected glue layer by grinding the height of the second-order bosses 211, that is, ensure the thickness of the injected glue layer and the area of the glue spot. On the one hand, this can extrude the epoxy glue to enhance the bonding force, and on the other hand, it can also extrude the excess epoxy glue to make it flow out from the glue overflow holes 33.

[0062] The first trimming pad 4 is used to be arranged between the connecting plate of the prism bonding support plate 3 and the curved surface prism frame 1 when the prism bonding support plate 3 is installed on the curved surface prism frame 1, so as to adjust the gap between the prism bonding support plate 3 and the curved surface prism; preferably, the first trimming pad 4 is made of metal rubber pad to improve the force and heat stability after the curved surface prism to be adjusted is fixed. The second trimming pad 7 is used to be arranged between the prism bonding support pillar 6 and the curved surface prism frame 1 when the prism bonding support pillar 6 is installed on the curved surface prism frame 1, so as to adjust the gap between the prism bonding support pillar 6 and the curved surface prism.

[0063] A micro-stress support structure for a curved surface prism provided by the present invention bonds the prism bonding support plate and the prism bonding support pillar on the curved surface prism frame, and realizes the high surface shape accuracy and high force and heat stability micro-stress support of the curved surface prism through a plurality of glue injection holes arranged on the bonding support plate. The structure is simple, has good feasibility, and is applicable to the high-stability micro-stress support of optical elements such as reflectors, prisms, and gratings.

[0064] Based on the above micro-stress support structure for a curved surface prism, the present invention also provides an alignment method for the micro-stress support structure of a curved surface prism, which specifically includes the following steps:

[0065] 1. Install the curved surface prism to be adjusted

[0066] Coaxially install the curved surface prism to be adjusted in the curved surface prism frame 1, and complete the position adjustment of the curved surface prism to be adjusted in the curved surface prism frame 1 through a feeler gauge; then make the prism bonding support pillar 6 pass through the through hole of the second trimming pad 7 to complete the positioning and preliminary fixing of the curved surface prism to be adjusted.

[0067] 2. Bonding of the prism bonding support plate 3

[0068] 2.1 When installing the prism bonding support plate 3 on the curved surface prism frame 1, make the pin 5 pass through the pin hole 34 and connect with the outer side wall of the curved surface prism frame 1 to fix the relative position of the prism bonding support plate 3 and the curved surface prism frame 1; then set the first trimming pad 4 at the installation connection of the prism bonding support plate 3 and the curved surface prism frame 1, and adjust the gap between the prism bonding support plate 3 and the curved surface prism to be adjusted through the first trimming pad 4; then adjust the phase of the curved surface prism according to the design requirements, and fix the prism bonding support plate 3 and the curved surface prism frame 1 through the installation hole 37; then inject epoxy glue into the glue injection hole 31 of the prism bonding support plate 3 to make the epoxy glue contact with the side wall of the curved surface prism to be adjusted.

[0069] 2.2 Install the plurality of thickness control blocks 21 on the glue layer thickness control block 2 from the outside, that is, from the side far away from the curved surface prism frame 1, into the glue injection hole 31 respectively to realize the control of the glue layer thickness.

[0070] 3】After the adhesive layer is cured, remove the gluing strut 6 and the second trimming pad 7, and adjust the thickness of the second trimming pad 7 or replace it with a second trimming pad 7 with a higher thickness, so that the gap between the prism gluing strut 6 and the surface prism to be adjusted is 0.1 mm.

[0071] Apply silicone rubber to the end face of the prism gluing strut 6 close to one end of the surface prism frame 1, and make one end of the prism gluing strut 6 pass through the second trimming pad 7 and the through hole in sequence with the silicone rubber and contact the side wall of the surface prism to be adjusted, so as to realize the auxiliary bonding and fixing of the surface prism to be adjusted.

[0072] 6】After standing for 24 h, the assembly and adjustment are completed. After the assembly and adjustment are completed, check whether the surface accuracy of the surface prism to be adjusted meets the design requirements by measurement.

[0073] As described above, it is only used to illustrate the technical solution of the present invention, rather than limiting it. For those of ordinary professional skills in the art, the specific technical solution recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution protected by the present invention.

Claims

1. A micro-stress support structure for a curved prism, characterized in that: it includes a curved prism frame (1), two prism bonding pillar groups, two prism bonding support plates (3), and two groups of glue layer thickness control structures (2); The curved prism frame (1) is used to install the curved prism to be adjusted; The two prism bonding pillar groups are respectively connected to the top side wall and the bottom side wall of the curved prism frame (1); the two prism bonding support plates (3) are respectively connected to the side walls on both sides of the curved prism frame (1); A plurality of glue injection holes (31) are formed on the end surface of the bonding support plate (3); Through grooves are respectively formed on the side walls on both sides of the curved prism frame (1) corresponding to the bonding support plate (3). One end of the bonding support plate (3) is embedded in the through groove, and the bonding support plate (3) is bonded to the curved prism to be adjusted by injecting glue into the glue injection holes (31); Glue injection bosses (32) are arranged on the end surface of the prism bonding support plate (3) corresponding to the glue injection holes (31), and are used to ensure the bonding area between the curved prism to be adjusted and the prism bonding support plate (3) through the glue injection bosses (32); Overflow holes (33) communicated with the glue injection holes (31) are arranged on the side wall of the prism bonding support plate (3), and are used to overflow the excess bonding glue; The prism bonding support plate (3) includes a plurality of bonding blocks (35) and a stress release flexible structure (36) connecting adjacent two bonding blocks (35); The glue injection holes (31), the corresponding glue injection bosses (32), and the overflow holes (33) are located on the corresponding bonding blocks (35); The stress release flexible structure (36) is used to release the curing stress, assembly stress, and residual stress caused by temperature change of the bonding glue; Through holes are formed on the top side wall and the bottom side wall of the curved prism frame (1) corresponding to the prism bonding pillar groups, and the prism bonding pillar groups are bonded to the curved prism to be adjusted through the through holes; Each group of the glue layer thickness control structures (2) includes a plurality of glue layer thickness control blocks (21); one end of the glue layer thickness control block (21) is inserted into the corresponding glue injection hole (31) from the side far away from the curved prism frame (1), and extrudes the bonding glue in the glue injection hole (31), and is used to adjust the thickness of the injected glue layer.

2. The micro-stress support structure for a curved prism according to claim 1, characterized in that: A first trimming pad (4) is arranged between the curved prism frame (1) and the prism bonding support plate (3), and is used to adjust the gap between the prism bonding support plate (3) and the curved prism to be adjusted; The prism bonding pillar group includes two prism bonding pillars (6); one end of the prism bonding pillar (6) is used to pass through the through hole to be bonded to the curved prism to be adjusted; A second trimming pad (7) is arranged between the curved prism frame (1) and the prism bonding pillar (6), and is used to adjust the gap between the prism bonding pillar (6) and the curved prism to be adjusted.

3. The micro-stress support structure for a curved prism according to claim 2, characterized in that: It further includes a pin (5); The prism bonding support plate (3) is provided with pin holes (34), and pins (5) pass through the pin holes (34) to connect with the outer side wall of the curved prism frame (1) for fixing the relative positions of the prism bonding support plate (3) and the curved prism frame (1).

4. A micro-stress support structure for a curved prism according to claim 3, wherein: The first trimming pad (4) is made of metal rubber pad.

5. A micro-stress support structure for a curved prism according to any one of claims 1-4, wherein: A gap of 0.1 mm - 0.15 mm is reserved between the inner wall of the curved prism frame (1) and the outer wall of the to-be-adjusted curved prism.

6. An alignment method for a micro-stress support structure of a curved prism according to any one of claims 1-5, characterized in that it includes the following steps: 1] Install the to-be-adjusted curved prism Coaxially install the to-be-adjusted curved prism in the curved prism frame (1), and complete the positioning and preliminary fixing of the to-be-adjusted curved prism through the prism bonding support pillar group and the feeler gauge; 2] Realize the bonding of the prism bonding support plate (3) 2.1] Install the prism bonding support plate (3) on the curved prism frame (1), and after adjusting the phase of the curved prism according to the design requirements, inject the bonding glue into the glue injection hole (31) of the prism bonding support plate (3), and make the bonding glue contact the side wall of the to-be-adjusted curved prism through the through groove; 2.2] Insert the thickness control blocks (21) on the glue layer thickness control structure (2) into the glue injection holes (31) respectively from the side far away from the curved prism frame (1) to realize the control of the glue layer thickness; 3] After the glue layer is cured, perform auxiliary bonding and fixing on the prism bonding support pillar group and the curved prism; 4] After standing for 24 h, the alignment is completed.

7. An alignment method for a micro-stress support structure of a curved prism according to claim 6, characterized in that: Step 1] is specifically: Coaxially install the to-be-adjusted curved prism in the curved prism frame (1), and complete the position adjustment of the to-be-adjusted curved prism in the curved prism frame (1) through the feeler gauge; the prism bonding support pillar group includes two prism bonding support pillars (6), a second trimming pad (7) is arranged between the curved prism frame (1) and the prism bonding support pillar (6), and then one end of the prism bonding support pillar (6) passes through the second trimming pad (7) and the through hole to abut against the side wall of the to-be-adjusted curved prism to complete the positioning and preliminary fixing of the to-be-adjusted curved prism; Step 2.1] is specifically: When installing the prism bonding support plate (3) on the curved prism frame (1), make the pin (5) pass through the pin hole (34) to connect with the outer side wall of the curved prism frame (1) to fix the relative positions of the prism bonding support plate (3) and the curved prism frame (1); then arrange the first trimming pad (4) at the installation connection of the prism bonding support plate (3) and the curved prism frame (1), and adjust the gap between the prism bonding support plate (3) and the to-be-adjusted curved prism through the first trimming pad (4); after adjusting the phase of the curved prism according to the design requirements, inject epoxy glue into the glue injection hole (31) of the prism bonding support plate (3), and make the epoxy glue contact the side wall of the to-be-adjusted curved prism.

8. The alignment method of the micro-stress support structure of a curved prism according to claim 7, characterized in that: before the step 3】, before the prism bonding pillar group is adhesively fixed to the curved prism, it further includes: removing the prism bonding pillar (6) and the second trimming pad (7), and adjusting the thickness of the second trimming pad (7) so that the gap between the prism bonding pillar (6) and the curved prism to be adjusted is 0.1 mm; the specific operation of adhesively fixing the prism bonding pillar group to the curved prism is: applying silicone rubber on the end face of the prism bonding pillar (6) close to one end of the curved prism frame (1), and making one end of the prism bonding pillar (6) pass through the second trimming pad (7) and the through hole with the silicone rubber and contact the side wall of the curved prism to be adjusted, so as to realize the auxiliary adhesive fixing of the curved prism to be adjusted.

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