Focal plane splicing structure

Abstract

The invention discloses a focal plane splicing structure, and relates to the technical field of space optical loads, the focal plane splicing structure comprises a focal plane frame, the focal plane frame is arranged to be in a hollow and one-way opening shape, and the two sides of the outer wall of the focal plane frame are symmetrically and fixedly connected with a left side focal plane group and a right side focal plane group through bolts respectively; the inner cavity wall of the focal plane frame is symmetrically and fixedly connected with a left side splicing mirror and a right side splicing mirror through bolts. According to the scheme, the structure is simple and compact, the weight is light, the device can better adapt to parts, a mixed splicing mode of optical and mechanical splicing is adopted at the same time, the device is innovative, the number of parts used in the scheme is small, the structure is simple, the reliability is high, the splicing use possibility of small-image-plane large-packaging detection is improved, and the detection efficiency is improved. And the scheme is optimal to use when the focal plane length of the detector is less than half of the packaging size.

Description

Technical Field

[0001] This invention relates to the field of space optical payload technology, specifically a focal plane splicing structure. Background Technology

[0002] Focal plane stitching technology is an important method for overcoming the limitations of single-frame field of view in optical imaging. In traditional optical systems, due to limitations in detector size and optical design, there is an inherent contradiction between a large field of view and high resolution. A single focal plane detector often struggles to simultaneously meet the observation requirements of wide coverage and high precision. This contradiction is particularly pronounced in fields requiring large-scale, detailed imaging, such as astronomical observation, space remote sensing, and biological microscopy.

[0003] Currently, the mosaic focal plane components used in space cameras mainly employ two technical solutions: optical mosaicking and mechanical mosaicking. Optical mosaicking achieves continuous coverage of adjacent detector pixels through microprism arrays or beam splitters, while mechanical mosaicking relies on high-precision fabrication of the detector packaging structure to physically mount multiple sub-detectors onto a rigid substrate. However, when dealing with detectors with "small image plane, large package" characteristics (i.e., a special configuration where the effective focal plane size is less than 50% of the package structure), both traditional solutions face fundamental limitations: optical mosaicking is limited by the excessive distance between the edge of the effective photosensitive area and the package, preventing the prism assembly from establishing effective optical path coupling; mechanical mosaicking, on the other hand, suffers from the problem of the package's mechanical support area occupying too large a proportion, preventing the formation of necessary physical contact surfaces between adjacent detectors.

[0004] To address this, a focal plane splicing structure is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a focal plane splicing structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a focal plane splicing structure, comprising a focal plane frame, the focal plane frame being hollow and having a one-way opening, a left focal plane group and a right focal plane group being symmetrically fixed to the outer walls of the focal plane frame by bolts, a left splicing mirror and a right splicing mirror being symmetrically fixed to the inner walls of the focal plane frame by bolts, and a middle focal plane group being fixed to the lower left, lower right, and upper middle of the middle focal plane group in a triangular shape on the side of the focal plane frame away from the opening by bolts, and a heat dissipation component being fixed to the side of the focal plane frame near the lower left of the middle focal plane group by bolts.

[0007] Furthermore, the left focal plane assembly, the lower left of the middle focal plane assembly, the upper middle of the middle focal plane assembly, the right focal plane assembly, and the lower right of the middle focal plane assembly are all detachably connected to the focal plane frame by bolts.

[0008] Furthermore, the left focal plane group, the lower left of the middle focal plane group, the upper middle of the middle focal plane group, the right focal plane group, and the lower right of the middle focal plane group are each composed of multiple individual focal planes.

[0009] Furthermore, the focal plane frame is equipped with multiple adjustment components, each corresponding to a focal plane group. Each adjustment component includes a support block fixedly connected to the focal plane frame. A guide groove is formed on the side of the support block away from the focal plane frame, and a slider is slidably connected within the guide groove. A telescopic rod one is fixedly connected to the side of the slider away from the support block. Telescopic rod one includes a fixed shaft and a telescopic shaft. The telescopic shaft end of telescopic rod one faces the side away from the slider, and a bearing block is fixedly connected to the telescopic shaft end of telescopic rod one. The bearing block is L-shaped, and a second telescopic rod is fixedly connected to the bearing block. The second telescopic rod is divided into a fixed... The telescopic shaft and telescopic rod 2 have their telescopic shaft ends facing away from the bearing block. Multiple blocks are set on the telescopic shaft end of telescopic rod 2. Telescopic rod 2 is fixedly connected to one of the blocks. Each block has a universal ball rotatably connected to it. Each universal ball has a carrier plate fixedly connected to its top. The carrier plate is U-shaped. Two adhesive blocks are symmetrically fixedly connected to the inner surface of each carrier plate. A telescopic rod 3 is connected between two adjacent blocks. Each telescopic rod 1, telescopic rod 2, and multiple telescopic rod 3s has a collar block fixedly connected to it. Each collar block has an injection port.

[0010] Furthermore, the guide groove and the slider are interference-fitted, meaning they fit together tightly.

[0011] Furthermore, the telescopic shafts and fixed shafts of telescopic rod one, telescopic rod two, and multiple telescopic rods three are all interference fit, meaning they fit tightly together.

[0012] Furthermore, the omnidirectional ball and the block are interference fit, meaning they fit tightly together, and the omnidirectional ball slides within the block in a limited manner.

[0013] Compared with the prior art, the beneficial effects of the present invention are: A hybrid splicing scheme based on structured optomechanical co-design is proposed. This technology optimizes the three-dimensional topology of the packaging substrate to construct an inlaid mounting surface with a micro-tilt angle in the mechanical dimension, while introducing a wedge-shaped microlens array for optical path compensation in the optical dimension. Specifically, a silicon carbide substrate with a gradient expansion coefficient is used to form a preset tilt angle of 0.05°-0.2°, combined with an aspherical microlens group to perform wavefront correction for misalignment of ±15μm, ultimately achieving sub-pixel-level registration of the detector array within a limited packaging space. Validated by vacuum thermal cycling, this scheme reduces the splicing gap from 300μm in traditional mechanical splicing to below 50μm, achieving a surface accuracy of λ / 10@632.8nm, without introducing any moving mechanisms, significantly improving the environmental adaptability of the space camera focal plane assembly.

[0014] The proposed solution features a simple and compact structure with a lighter weight, making it more adaptable to various components. It also employs a hybrid splicing method combining optical and mechanical splicing, representing a significant innovation. Furthermore, the solution uses fewer parts, has a simple structure, and offers high reliability. It also increases the feasibility of splicing small-image-plane, large-package detectors. This solution is optimally suited for use when the detector's focal length is less than half the package size.

[0015] Since adjusting a single focal plane group requires corresponding adjustments to the other focal plane groups, the interference-fitted movable structure ensures that the position of the previously adjusted focal plane group is temporarily fixed while the operator adjusts other focal plane groups. This facilitates comparative adjustments between multiple focal plane groups and prevents movement of multiple focal plane groups from interfering with the operator's adjustments.

[0016] By solidifying the movable structures within the adjustment assembly—that is, after adjusting the position of each focal plane, in addition to removing the original threaded connections and glue fixation, the movable structures required for adjusting the position can also be solidified—the immovability of the focal plane splicing structure after splicing is completed is ensured, thus ensuring the stability of the optical imaging formed by the focal plane splicing after the focal plane splicing structure is completed. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall device of the present invention; Figure 2 This is a schematic diagram showing the positions of the focal plane assembly, focal plane frame, and other structures on the left side of this invention. Figure 3 This is a schematic diagram showing the positions of the heat dissipation component, the lower right corner of the intermediate focal plane group, and other structures of the present invention. Figure 4 This is a schematic diagram showing the positions of the left and right splicing mirrors and other structures of the present invention; Figure 5 This is a schematic diagram showing the positions of the splicing mirror, heat dissipation components, and other structures on the left side of the present invention; Figure 6 This is a schematic diagram showing the positions of the left focal plane group, the lower right of the middle focal plane group, and other structures in this invention. Figure 7 This is a schematic diagram showing the positions of the focal plane frame, support blocks, and other structures of the present invention; Figure 8 This is a cross-sectional schematic diagram of the support block, slider, and other structures of the present invention.

[0018] In the picture: 1. Left focal plane group; 2. Focal plane frame; 3. Left mosaic lens; 4. Lower left of the middle focal plane group; 5. Upper center of the middle focal plane group; 6. Right mosaic lens; 7. Right focal plane group; 8. Heat dissipation assembly; 9. Lower right of the middle focal plane group; 11. Support block; 12. Guide groove; 13. Slider; 14. Telescopic rod one; 15. Bearing block; 16. Telescopic rod two; 17. Cube; 18. Universal ball; 19. Carrier plate; 110. Adhesive block; 111. Telescopic rod three; 112. Collar block; 113. Glue injection port. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0020] The embodiments provided by this invention: The following content is based on Figure 1 For location reference.

[0021] Example 1: Please refer to Figures 1 to 6 As shown, a focal plane splicing structure includes a focal plane frame 2, which is hollow and has a one-way opening. The outer walls of the focal plane frame 2 are symmetrically fixed to the left focal plane group 1 and the right focal plane group 7 by bolts. The inner walls of the focal plane frame 2 are symmetrically fixed to the left splicing mirror 3 and the right splicing mirror 6 by bolts. On the side of the focal plane frame 2 away from the opening, the lower left 4, the lower right 9, and the upper middle 5 of the middle focal plane group are fixed to the middle focal plane group in a triangular shape by bolts. The side of the focal plane frame 2 near the lower left 4 of the middle focal plane group is fixed to the heat dissipation component 8 by bolts.

[0022] Among them, the left focal plane group 1, the lower left of the middle focal plane group 4, the upper middle of the middle focal plane group 5, the right focal plane group 7, and the lower right of the middle focal plane group 9 are all detachably connected to the focal plane frame 2 by bolts. However, during actual splicing, the left focal plane group 1, the lower left of the middle focal plane group 4, the upper middle of the middle focal plane group 5, the right focal plane group 7, and the lower right of the middle focal plane group 9 all need to be repeatedly adjusted by the operator to ensure that each focal plane group has pixel overlap in the vertical direction, thereby avoiding focal plane gaps and other focal plane problems.

[0023] Among them, the left focal plane group 1, the lower left of the middle focal plane group 4, the upper middle of the middle focal plane group 5, the right focal plane group 7, and the lower right of the middle focal plane group 9 each consist of multiple individual focal planes. Each individual focal plane needs to be individually aligned and adjusted when it is assembled onto the focal plane frame 2.

[0024] Specifically, after multiple focal plane groups and the left and right splicing mirrors 3 and 6 are spliced ​​together, they need to be aligned and connected with the external detector. Specifically, the opening side of the focal plane frame 2 should face the external detector and be fixedly connected.

[0025] Unlike traditional optical and mechanical splicing methods, this structure requires consideration of the interrelationships of the detectors during assembly and adjustment. The reference position of the focal plane frame 2 is fixed during assembly to ensure stability. First, the upper middle focal plane group 5 is installed, followed by the left splicing mirror 3 and the left focal plane group 1. After installing the left focal plane group 1, the right splicing mirror 6 and the right focal plane group 7 are installed. Note that when installing the left and right splicing mirrors 3 and 6, the mounts of the left and right splicing mirrors 3 and 6 should be directly inserted into the focal plane frame 2. The left and right splicing mirrors 3 and 6 are fixed together with bolts, and no position adjustment is required during installation. After the focal plane groups on both sides of the focal plane frame 2 are installed, the lower left 4 and lower right 9 of the middle focal plane group are installed in sequence, followed by the heat dissipation assembly 8. The installation positions of the left focal plane group 1, the lower left 4 of the middle focal plane group, the upper middle 5 of the middle focal plane group, the right focal plane group 7, and the lower right 9 of the middle focal plane group need to be repeatedly adjusted to ensure that the pixels of each focal plane group overlap in the vertical direction, thereby avoiding focal plane gaps and other focal plane problems. After installation, each focal plane group is fixed to the focal plane frame 2 with bolts and glued in place, thus completing the installation of the entire focal plane splicing.

[0026] After the focal plane stitching is completed, it forms a complete focal plane stitching structure, which can achieve the following beneficial effects: Firstly, a hybrid splicing scheme based on structured optomechanical co-design was proposed. This technology optimizes the three-dimensional topology of the packaging substrate to construct an inlaid mounting surface with a micro-tilt angle in the mechanical dimension, while simultaneously introducing a wedge-shaped microlens array for optical path compensation in the optical dimension. Specifically, a silicon carbide substrate with a gradient expansion coefficient is used to form a preset tilt angle of 0.05°-0.2°, combined with an aspherical microlens group to perform wavefront correction for misalignments of ±15μm, ultimately achieving sub-pixel-level registration of the detector array within a limited packaging space. After vacuum thermal cycling verification, this scheme reduces the splicing gap from 300μm in traditional mechanical splicing to below 50μm, achieving a surface accuracy of λ / 10@632.8nm, without introducing any moving mechanisms, significantly improving the environmental adaptability of the space camera focal plane assembly.

[0027] Secondly, the structure achieved by this solution is simple and compact, lightweight, and more adaptable to components. It also adopts a hybrid splicing method of optical and mechanical splicing, which is innovative. Furthermore, this solution uses fewer parts, has a simple structure and high reliability, and also increases the possibility of splicing small image plane large package detection. Moreover, this solution is best used when the focal length of the detector is less than half of the package size.

[0028] Example 2: The following refers to Figure 7 , Figure 8As shown in Embodiment 1, during actual assembly, the left focal plane group 1, the lower left of the middle focal plane group 4, the upper middle of the middle focal plane group 5, the right focal plane group 7, and the lower right of the middle focal plane group 9 all require repeated adjustments to their installation positions by the operator; and each individual focal plane requires separate alignment adjustments when assembled onto the focal plane frame 2. This alignment adjustment process is quite cumbersome. Therefore, an adjustment component for each focal plane group is proposed, which can provide temporary support during the adjustment process and permanent fixation after the adjustment is completed.

[0029] Multiple adjustment components are provided on the focal plane frame 2, each corresponding to a focal plane group. Each adjustment component includes a support block 11, which is fixedly connected to the focal plane frame 2. A guide groove 12 is provided on the side of the support block 11 away from the focal plane frame 2. A slider 13 is slidably connected within the guide groove 12. A telescopic rod 14 is fixedly connected to the side of the slider 13 away from the support block 11. The telescopic rod 14 includes a fixed shaft and a telescopic shaft. The telescopic shaft end of the telescopic rod 14 faces the side away from the slider 13. A bearing block 15 is fixedly connected to the telescopic shaft end of the telescopic rod 14. The bearing block 15 is L-shaped, and a second telescopic rod 16 is fixedly connected to the bearing block 15. The second telescopic rod 16 consists of a fixed shaft and a telescopic shaft. The telescopic shaft end of telescopic rod 2 16 faces away from the bearing block 15. Multiple blocks 17 are provided on the telescopic shaft end of telescopic rod 2 16. Telescopic rod 2 16 is fixedly connected to one of the blocks 17. Each block 17 is rotatably connected to a universal ball 18. Each universal ball 18 is fixedly connected to a carrier plate 19 at its top. The carrier plate 19 is U-shaped. Two adhesive blocks 110 are symmetrically fixedly connected to the inner surface of each carrier plate 19. A telescopic rod 3 111 is connected between two adjacent blocks 17. A collar block 112 is fixedly connected to each of telescopic rod 1 14, telescopic rod 2 16 and multiple telescopic rods 3 111. Each collar block 112 has an injection port 113.

[0030] in, Figure 7 , Figure 8 The connection relationship of the adjustment components is shown in the figure, taking the process of installing the right focal plane group 7 on the focal plane frame 2 as an example.

[0031] Wherein: the guide groove 12 and the slider 13 are interference fit, that is, the two are tightly fitted, the function is to make the slider 13 slide in the guide groove 12 subject to resistance. This resistance is used to limit the position of the slider 13 in the guide groove 12 when the slider 13 stops sliding, and to prevent the slider 13 from moving abnormally in the guide groove 12.

[0032] Among them, the telescopic shafts of telescopic rod 14, telescopic rod 2 16 and multiple telescopic rods 3 111 are all interference fit with the fixed shaft, that is, the two are tightly fitted. The function is to make the sliding of the telescopic shaft within the fixed shaft resisted. This resistance is used to limit the position of the telescopic shaft within the fixed shaft when the position of the telescopic shaft end is no longer adjusted, so as to prevent abnormal movement of the telescopic shaft within the fixed shaft.

[0033] The number of squares 17 corresponds to the number of individual focal planes in the focal plane group corresponding to the adjustment component.

[0034] Wherein: the omnidirectional ball 18 and the block 17 are interference fit, that is, the two are tightly fitted, and the omnidirectional ball 18 is limited to slide within the block 17. The function is to make the rotation of the omnidirectional ball 18 within the block 17 subject to resistance. This resistance is used to limit the position of the omnidirectional ball 18 within the block 17 when the angle of the omnidirectional ball 18 is not adjusted, so as to prevent the omnidirectional ball 18 from moving abnormally within the block 17.

[0035] Specifically, the sliding of slider 13 within guide groove 12, the extension and retraction of telescopic rods 14 and 16, and the angle adjustment of the universal balls 18, work together to achieve flexible position adjustment of the multiple universal balls 18 on telescopic rod 16, specifically adjusting the position of the focal plane on the X, Y, and Z axes. Simultaneously, the rotation of the universal balls 18 on block 17 allows for adjustable rotation angle of the focal plane. Furthermore, the telescopic rod 111 between adjacent blocks 17 allows for adjustable spacing between multiple focal planes within a single focal plane group, and individual adjustment of the rotation angle of each focal plane within a single focal plane group, thus expanding the adjustability of the focal plane.

[0036] Wherein: the two adhesive blocks 110 on a single carrier plate 19 are positioned close to each other on one side as an adhesive surface, the function of which is: when the coke surface is snapped into the carrier plate 19, the coke surface can be fixed on the carrier plate 19 by the adhesive of the adhesive blocks 110.

[0037] Each collar block 112 is fixedly connected to the fixed shaft on the telescopic rod 14, telescopic rod 2 16, and telescopic rod 3 111, fitting snugly against the telescopic shaft but not restricting its extension and retraction. A cavity is provided inside the collar block 112, covering the connection between the fixed shaft and the telescopic shaft.

[0038] When the adjustment assembly is running, the operator inserts each focal plane of the corresponding focal plane group into each carrier plate 19, so that each focal plane is glued and fixed to the carrier plate 19 by the adhesive block 110. At this time, the user can adjust the spacing between each focal plane by adjusting the extension and retraction of the extension shafts of multiple telescopic rods 111; by adjusting the rotation of the universal ball 18 corresponding to each focal plane in the block 17, the deflection angle of each focal plane can be adjusted; by adjusting the sliding of the slider 13 in the guide groove 12 and the extension and retraction of the extension shafts of the first telescopic rod 14 and the second telescopic rod 16, the positions of multiple focal planes can be adjusted simultaneously on the X, Y, and Z axes, so that each focal plane can be flexibly adjusted in three-dimensional space. After the adjustment is completed, the operator no longer operates the multiple movable structures. Since each movable structure has an interference fit design, the position of each focal plane after adjustment is temporarily fixed until the operator adjusts it again. This achieves the following: Because of the interrelationship between the various focal plane groups, each focal plane group requires repeated adjustments to its installation position to ensure pixel overlap in the vertical direction, thus avoiding focal plane gaps and other focal plane problems. In other words, adjusting a single focal plane group requires corresponding adjustments to the others. The interference-fit movable structure ensures that the previously adjusted focal plane group's position is temporarily fixed while the operator adjusts other focal plane groups, facilitating comparative adjustments between multiple focal plane groups. This prevents movement of multiple focal plane groups during adjustment from interfering with the operator's work.

[0039] The adjustment assembly requires the use of adhesive. Since the adjustment assembly contains multiple movable structures, after the focal planes are assembled, the user can drip adhesive into the cavities of each collar block 112 through the glue injection port 113. It can also be dripped into the contact parts of the slider 13 and the guide groove 12, and onto each universal ball 18. Through the curing and bonding of the adhesive, the telescopic shafts and fixed shafts of the telescopic rod 14, telescopic rod 26, and telescopic rod 311 are fixed to each other, and the slider 13 is completely fixed in the guide groove 12, and the universal ball 18 is completely fixed in the block 17. This solidifies the movable structures within the adjustment assembly. That is, after the position of each focal plane is adjusted, in addition to the original threaded connection and glue fixation, the movable structures required for adjusting the position are also solidified, thereby ensuring the immovability of the focal plane splicing structure after assembly, and ensuring the stability of the optical imaging formed by the focal plane splicing structure.

[0040] By adjusting the operation of the components, the following beneficial effects can be achieved: Firstly, since adjusting a single focal plane group requires corresponding adjustments to the other focal plane groups, the interference-fit movable structure ensures that the previously operated focal plane group's position is temporarily fixed while the operator adjusts other focal plane groups. This facilitates comparative adjustments between multiple focal plane groups, preventing movement of multiple focal plane groups from interfering with the operator's adjustments.

[0041] Secondly, by solidifying the movable structures within the adjustment assembly, that is, after adjusting the position of each focal plane, in addition to removing the original threaded connection and glue fixation, the movable structures required for adjusting the position can also be solidified, thereby ensuring the immovability of the focal plane splicing structure after splicing, that is, ensuring the optical imaging stability formed by the focal plane splicing after the focal plane splicing structure is completed.

[0042] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A focal plane splicing structure, characterized in that: A focal plane splicing structure includes a focal plane frame (2), which is hollow and has a one-way opening. The outer walls of the focal plane frame (2) are symmetrically fixed to the left focal plane group (1) and the right focal plane group (7) by bolts. The inner walls of the focal plane frame (2) are symmetrically fixed to the left splicing mirror (3) and the right splicing mirror (6) by bolts. The side of the focal plane frame (2) away from the opening is fixed to the lower left (4), the lower right (9) and the upper middle (5) of the middle focal plane group by bolts in a triangular shape. The side of the focal plane frame (2) near the lower left (4) of the middle focal plane group is fixed to the heat dissipation component (8) by bolts.

2. The focal plane splicing structure according to claim 1, characterized in that: The left focal plane group (1), the lower left of the middle focal plane group (4), the upper middle of the middle focal plane group (5), the right focal plane group (7), and the lower right of the middle focal plane group (9) are all detachably connected to the focal plane frame (2) by bolts.

3. The focal plane splicing structure according to claim 1, characterized in that: The focal plane groups are composed of multiple individual focal planes, including the left focal plane group (1), the lower left of the middle focal plane group (4), the upper middle of the middle focal plane group (5), the right focal plane group (7), and the lower right of the middle focal plane group (9).

4. The focal plane splicing structure according to claim 1, characterized in that: Multiple adjustment components are provided on the focal plane frame (2), each adjustment component corresponding to a focal plane group. The adjustment component includes a support block (11), which is fixedly connected to the focal plane frame (2). A guide groove (12) is provided on the side of the support block (11) away from the focal plane frame (2). A slider (13) is slidably connected in the guide groove (12). A telescopic rod (14) is fixedly connected on the side of the slider (13) away from the support block (11). The telescopic rod (14) includes a fixed shaft and a telescopic shaft. The telescopic shaft end of the telescopic rod (14) faces the side away from the slider (13). A bearing block (15) is fixedly connected to the telescopic shaft end of the telescopic rod (14). The bearing block (15) is set in an L shape. A telescopic rod (16) is fixedly connected on the bearing block (15). The telescopic rod (16) is divided into a fixed shaft and a telescopic shaft. The telescopic shaft end of telescopic rod two (16) faces away from the bearing block (15). Multiple blocks (17) are provided on the telescopic shaft end of telescopic rod two (16). Telescopic rod two (16) is fixedly connected to one of the blocks (17). Each block (17) is rotatably connected to a universal ball (18). Each universal ball (18) is fixedly connected to a carrier plate (19) at its top. The carrier plate (19) is U-shaped. Two adhesive blocks (110) are symmetrically fixedly connected to the inner surface of each carrier plate (19). A telescopic rod three (111) is connected between two adjacent blocks (17). A collar block (112) is fixedly connected to each telescopic rod one (14), telescopic rod two (16), and multiple telescopic rod three (111). Each collar block (112) has an injection port (113).

5. The focal plane splicing structure according to claim 4, characterized in that: The guide groove (12) and the slider (13) are interference fit, that is, the two are closely fitted.

6. The focal plane splicing structure according to claim 4, characterized in that: The telescopic shafts and fixed shafts of telescopic rod one (14), telescopic rod two (16) and multiple telescopic rod three (111) are all interference fit, that is, the two are tightly fitted together.

7. The focal plane splicing structure according to claim 4, characterized in that: The omnidirectional ball (18) and the block (17) are interference fit, that is, the two are closely fitted, and the omnidirectional ball (18) slides within the block (17).

8. The focal plane splicing structure according to claim 4, characterized in that: The adhesive surfaces are set on the side of the two adhesive blocks (110) on a single carrier plate (19) that are close to each other.

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