Long base line multi-segment optical path multi-dimensional precision tuning lens adjusting structure

Abstract

The application relates to the technical field of optical lenses, and particularly provides a long-baseline multi-division light path multi-dimensional precision tuning lens adjusting structure, which comprises a lens group module, a first connecting barrel, a mounting barrel, a translation adjusting frame and an imaging camera, the lens group module is provided with a main light path and a plurality of sub-light path exit ends, and is respectively connected with the first connecting barrel and the mounting barrels. One end of the two types of barrels is provided with a square flange, a differential adjuster is matched through a bolt, and a precision alignment is realized; the other end is provided with a circular flange, a tension bolt with an arc-shaped groove is matched, a jackscrew is connected, the translation adjusting frame and the imaging camera are connected. The structure can precisely calibrate the parallelism of the optical axes of the multi-lens array, the baseline length and the division alignment accuracy, solves the problems of traditional debugging and adjustment interference, error accumulation and field misalignment, has high debugging precision and strong universal adaptability, and can effectively improve the imaging quality and operation reliability of the long-baseline multi-division imaging system.

Description

Technical Field

[0001] This invention relates to the field of optical lens technology, and in particular to a long-baseline multi-segment optical path multidimensional precision tuning lens adjustment structure. Background Technology

[0002] Long-baseline multi-span optical path systems are core optical devices in fields such as medical fluorescence tracking, high-speed imaging, and transient physical process observation. They achieve multi-channel synchronous spanning imaging, large field-of-view stitched imaging, or stereo baseline ranging imaging through multiple lens arrays arranged along a fixed baseline spacing. The imaging accuracy, field-of-view stitching consistency, and baseline measurement accuracy of this system directly depend on the mechanical assembly precision and optical path tuning precision of each lens array. The matching of multi-dimensional mechanical parameters such as lens axial position, radial eccentricity, angular tilt, and baseline spacing is a key factor determining the overall system performance.

[0003] Current lens adjustment mechanisms calibrate for lens focusing or single-axis eccentricity, failing to consider the coupling interference of multi-dimensional mechanical parameters in long-baseline optical paths. Axial displacement and angular tilt can indirectly cause optical axis misalignment, while radial eccentricity adjustment affects baseline parallelism, leading to repeated deviations and poor calibration stability after adjustment. Long-baseline optical paths exhibit significant error accumulation effects. Tiny mechanical assembly errors that are negligible over short distances are amplified considerably during long-baseline transmission, causing problems such as non-parallel optical axes of multi-frame lenses, field-of-view misalignment, and inconsistent image scaling ratios, severely impacting the accuracy of multi-frame image stitching. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-dimensional precision tuning lens adjustment structure for a long baseline multi-segment optical path, which can realize multi-dimensional adjustment of the lens and ensure the optical axis consistency, baseline accuracy and segmentation imaging quality of the long baseline multi-segment optical path.

[0005] This invention is implemented as follows: This invention provides a long baseline multi-fraction optical path multi-dimensional precision tuning lens adjustment structure, including a lens group module, a first connecting tube, a mounting tube, a translation adjustment frame, and an imaging camera; The mirror module has a main optical path output end and several sub-optical path output ends. The main optical path output end is connected to a first connecting cylinder, and each of the sub-optical path output ends is connected to a mounting cylinder. One end of the first connecting cylinder has a first square flange, and one end of the mounting cylinder has a second square flange. The other ends of the first connecting cylinder and the mounting cylinder are respectively provided with circular flanges. The first square flange is connected to the first connecting cylinder through a first adjustment mechanism, and the second square flange is connected to the mounting cylinder through a second adjustment mechanism. The circular flanges are connected to the translation adjustment frame via the third adjustment mechanism, and the translation adjustment frame is connected to the imaging camera. The first adjustment mechanism includes a limiting bolt and a first differential adjuster. The main optical path emission end is provided with a first top plate. One end of the limiting bolt passes through the first square flange and the first top plate and is connected to a nut. One end of the first differential adjuster passes through the first square flange and abuts against the first top plate. There are four limiting bolts and four first differential adjusters. The four limiting bolts are located at the four corners of the first square flange. The four first differential adjusters are divided into two groups and located on both sides of the first square flange. Among the four limiting bolts, the outer walls of the two limiting bolts located diagonally are also connected to fixing nuts and pre-locking nuts. The fixing nuts and pre-locking nuts are located between the first square flange and the first top plate, with one end face of the fixing nut contacting the first top plate and the pre-locking nut contacting the first square flange. The second adjustment mechanism includes a connecting bolt and a second differential adjuster. The sub-optical path output end is provided with a second top plate. One end of the connecting bolt passes through the second square flange and is connected to the second top plate. One end of the second differential adjuster passes through the second square flange and abuts against the second top plate. The third adjustment mechanism includes a tensioning bolt and a set screw. The circular flange has several arc-shaped grooves, each corresponding to a tensioning bolt. The tensioning bolt passes through the arc-shaped groove and connects to the translation adjustment frame. The set screw is threaded to the circular flange and passes through the circular flange to abut against the translation adjustment frame.

[0006] Furthermore, the sub-optical path has two output ends and three imaging cameras, namely a 500nm spectral image receiving camera, a 600nm spectral image receiving camera, and a full-band spectral image receiving camera. The mounting cylinders are respectively the second connecting cylinder and the third connecting cylinder; The full-band spectral image receiving camera is connected to the first connecting cylinder via the first translation adjustment frame, the 500nm spectral image receiving camera is connected to the second connecting cylinder via the second translation adjustment frame, and the 600nm spectral image receiving camera is connected to the third connecting cylinder via the third translation adjustment frame.

[0007] Furthermore, the lens assembly module includes a first lens barrel, a second lens barrel, a third lens barrel, a fourth lens barrel, a fifth lens barrel, and a sixth lens barrel. The first lens barrel and the second lens barrel are coaxially connected. The upper end of the second lens barrel is provided with a first connecting hole. The lower end of the third lens barrel is provided with a first shaft member, which is connected to the first connecting hole. The end face of the third lens barrel is provided with a second connecting hole. The end face of the fourth lens barrel facing the third lens barrel is provided with a second shaft member, which is connected to the second connecting hole. The two sides of the fourth lens barrel are respectively provided with a third connecting hole and a fourth connecting hole. The fifth lens barrel and the sixth lens barrel are respectively provided with a third shaft member and a fourth shaft member. The third shaft member is connected to the third connecting hole, and the fourth shaft member is connected to the fourth connecting hole. The first top plate is located at the end of the fourth lens tube away from the third lens tube, one of the second top plates is located on the side of the fifth lens tube, and the other of the first top plates is located on the end face of the sixth lens tube.

[0008] Furthermore, a first mounting hole is provided on the side of the third mirror tube, the first mounting hole is connected to a first rotating platform, and the first rotating platform is connected to a total reflection mirror; The fourth mirror tube has a second mounting hole and a third mounting hole on its side. The second mounting hole and the third mounting hole are respectively connected to a second rotating platform and a third rotating platform. The second rotating platform is connected to a first dichroic mirror, and the third rotating platform is connected to a second dichroic mirror. The fifth lens barrel has a fourth mounting hole, the fourth mounting hole is connected to a fourth rotating platform, and the fourth rotating platform is connected to a third dichroic mirror.

[0009] Furthermore, there are four connecting bolts and four second differential adjusters, with the four second differential adjusters located at the four corners of the second square flange and the four connecting bolts located at the center of the four sides of the second square flange.

[0010] The beneficial effects of this invention are as follows: The structure of this invention enables precise calibration of the optical axis parallelism, baseline length, and framing alignment accuracy of multi-lens arrays, effectively solving the technical problems of mutual interference in single-dimensional adjustments, accumulation of long-distance optical path deviations, and misalignment of the field of view in multi-framing imaging during traditional debugging. This adjustment structure has high debugging accuracy, good stability, and strong versatility, and can be adapted to optical lens systems with different baseline lengths and different numbers of framing sections, significantly improving the imaging quality and operational reliability of long-baseline multi-framing imaging systems. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1This is a schematic diagram of a long-baseline multi-segment optical path multidimensional precision tuning lens adjustment structure according to the present invention.

[0013] Figure 2 This is a schematic diagram of the connection structure between the lens assembly and the first connecting tube and the mounting tube in this invention.

[0014] Figure 3 This is a schematic diagram of the connection structure between the first connecting cylinder or mounting cylinder and the displacement adjustment frame and imaging camera in this invention.

[0015] Figure 4 For the present invention Figure 1 A partial structural diagram of the structure shown.

[0016] Figure 5 This is a schematic diagram of the connection structure of the second, third, and fourth lens barrels in this invention.

[0017] Figure 6 This is a schematic diagram of the structure of the third, fourth, and fifth lens tubes and the lenses inside the three lens tubes in this invention.

[0018] Figure 7 This is a schematic diagram of the connection structure between the dichroic mirror and the rotating platform in this invention.

[0019] Figure 8 This is a schematic diagram of the optical path structure of the medical fluorescence tracking optical system of the present invention.

[0020] Figure 9 for Figure 8 The diagram shows the main optical path of the optical system.

[0021] Figure 10 for Figure 8 The diagram shows the 500nm band optical path of the optical system.

[0022] Figure 11 for Figure 8 The diagram shows the 600nm band optical path of the optical system.

[0023] Explanation of the labels in the diagram: 1. Lens module; 101. First top plate; 102. Second top plate; 103. First lens barrel; 104. Second lens barrel; 1041. First connecting hole; 105. Third lens barrel; 1051. First shaft; 106. Fourth lens barrel; 1061. Second shaft; 107. Fifth lens barrel; 108. Sixth lens barrel; 2. First connecting cylinder; 21. First square flange; 3. Mounting cylinder; 31. Second square flange; 32. Second connecting cylinder; 33. Third connecting cylinder; 4. Translation adjustment bracket; 5. Imaging camera; 51. 500nm spectral image receiving camera; 52. 600nm spectral image receiving camera; 53. Full-wave... 6. Spectral image receiving camera; 7. Circular flange; 8. Arc groove; 9. First adjustment mechanism; 10. Limit bolt; 11. First differential adjuster; 12. Second adjustment mechanism; 13. Connecting bolt; 14. Second differential adjuster; 15. Third adjustment mechanism; 16. Tensioning bolt; 17. Set screw; 18. Nut; 19. First rotating platform; 20. Total reflection mirror; 11. Second rotating platform; 11. Third rotating platform; 12. 550nm long-pass dichroic mirror; 13. 600nm long-pass dichroic mirror; 14. Fourth rotating platform; 15. 520nm short-pass dichroic mirror; 16. Fixing nut; 27. Pre-locking nut. Detailed Implementation

[0024] Please see Figures 1 to 11 The present invention provides a long baseline multi-span optical path multi-dimensional precision tuning lens adjustment structure, including lens group module 1, first connecting tube 2, mounting tube 3, translation adjustment frame 4 and imaging camera 5; The lens module 1 has a main optical path output end and several sub-optical path output ends. Taking the medical fluorescence tracking optical system shown in the figure as an example, it includes a main optical path, a 500nm band optical path, and a 600nm band optical path. Therefore, in this invention, there are two sub-optical path output ends, corresponding to the 500nm band optical path and the 600nm band optical path, respectively. The imaging camera 5 has three cameras, namely a 500nm spectral image receiving camera 51, a 600nm spectral image receiving camera 52, and a full-band spectral image receiving camera 53.

[0025] The main optical path output end is connected to a first connecting cylinder 2, and each of the sub-optical paths output ends is connected to a mounting cylinder 3. Lenses are respectively provided inside the first connecting cylinder 2 and the mounting cylinder 3. One end of the first connecting cylinder 2 has a first square flange 21, and one end of the mounting cylinder 3 has a second square flange 31. The other ends of the first connecting cylinder 2 and the mounting cylinder 3 are respectively provided with circular flanges 6. The first square flange 21 is connected to the first connecting cylinder 2 through a first adjusting mechanism 7, and the second square flange 31 is connected to the mounting cylinder 3 through a second adjusting mechanism 8. The circular flange 6 is connected to the translation adjustment frame 4 via the third adjustment mechanism 9, and the translation adjustment frame 4 is connected to the imaging camera 5. The three translation adjustment frames 4 are cage-type XY translation adjustment frames of model CXY2-PM manufactured by Guangzhou Base Optical Technology Co., Ltd. Due to the mechanical fit and the effects of adjustment, the overall image of the lens may not be centered on the image of the imaging camera 5. The cage-type XY translation adjustment frame is used to adjust the position of the imaging camera 5 so that the image of the lens is centered on the image of the imaging camera 5.

[0026] The first adjustment mechanism 7 includes a limiting bolt 71 and a first differential adjuster 72. The main optical path emission end is provided with a first top plate 101. One end of the limiting bolt 71 passes through the first square flange 21 and the first top plate 101 and is connected to a nut 10. The outer wall of the first differential adjuster 72 is connected to the first square flange 21 through a brass adapter. The end of the first differential adjuster 72 is ball-shaped and passes through the first square flange 21 to abut against the first top plate 101. By rotating the first differential adjuster 72, the tilt angle of the first connecting cylinder 2 is adjusted to solve the problem of optical axis misalignment.

[0027] The second adjustment mechanism 8 includes a connecting bolt 81 and a second differential adjuster 82. The sub-optical path output end is provided with a second top plate 102. One end of the connecting bolt 81 passes through the second square flange 31 and is connected to the second top plate 102. The outer wall of the second differential adjuster 82 is connected to the second square flange 31 through a brass adapter. The end of the second differential adjuster 82 is ball-shaped and passes through the second square flange 31 to abut against the second top plate 102. By rotating the second differential adjuster 82, the tilt angle of the mounting cylinder 3 is adjusted to solve the problem of optical axis misalignment.

[0028] Due to the cumulative errors caused by the mechanical fit and the machining errors of mechanical parts, tilting or wobbling may occur during the assembly of the lens barrel and connecting tube. For lenses with low sensitivity, this can easily lead to optical path off-axis, resulting in image motion blur. The first adjustment mechanism 7 and the second adjustment mechanism 8 can adjust the tilt or wobbling of the corresponding connecting tube to avoid image motion blur caused by optical path off-axis. Moreover, compared to the third adjustment mechanism 9 where the set screw 92 adjusts for image motion blur, the adjustment of the first differential adjuster 72 and the second differential adjuster 82 is a coarse adjustment.

[0029] In the first square flange 21, the first top plate 101, the second square flange 31, and the second top plate 102, the inner diameter of the bolt hole through which the bolt passes is larger than the outer diameter of the bolt, so as to provide the first connecting sleeve 2, the second connecting sleeve 32, and the third connecting sleeve 33 with degrees of freedom for swaying.

[0030] The first differential regulator 72 and the second differential regulator 82 are differential regulators of model PSM25-C manufactured by Guangzhou Jizuo Optical Technology Co., Ltd.

[0031] The third adjustment mechanism 9 includes a tension bolt 91 and a set screw 92. The circular flange 6 has four arc-shaped grooves 61, each corresponding to a tension bolt 91. The tension bolt 91 passes through the arc-shaped grooves 61 and connects to the translation adjustment frame 4. The set screw 92 is threaded to the circular flange 6 and passes through the circular flange 6 to abut against the translation adjustment frame 4.

[0032] Multi-frame lenses need to maintain the consistency of the plane angle of each imaging frame to ensure that the observer can observe the details of the same object through multiple frames. In the prior art, due to the deviation of the camera installation, there are differences in the plane angle of multiple frames. At this time, the imaging camera 5 and the corresponding translation adjustment bracket 4 are rotated together to adjust the plane angle of the imaging frames of multiple imaging cameras 5 to be consistent. Then, the tension bolt 91 is tightened.

[0033] Due to mechanical errors, the focal plane of the optical path may not always fall on the sensing surface of the imaging camera 5, resulting in out-of-focus images and motion blur. By rotating the set screw 92, the distance between the imaging camera 5 and the first connecting cylinder 2 and / or mounting cylinder 3 can be controlled. Furthermore, by controlling the extension of the four set screws 92, the tilt angle of the imaging camera 5 relative to the radial reference plane of the optical axis can be adjusted, thereby achieving the effects of focusing and adjusting the motion blur. The adjustment of the motion blur by the set screws 92 is a fine-tuning technique.

[0034] Specifically, there are two sub-optical path output ends and three imaging cameras 5, namely a 500nm spectral image receiving camera 51, a 600nm spectral image receiving camera 52 and a full-band spectral image receiving camera 53. The mounting cylinder 3 is a second connecting cylinder 32 and a third connecting cylinder 33; the lenses installed in the second connecting cylinder 32 and the third connecting cylinder 33 are different.

[0035] The full-band spectral image receiving camera 53 is connected to the first connecting cylinder 2 via the first translation adjustment frame 4, the 500nm spectral image receiving camera 51 is connected to the second connecting cylinder 32 via the second translation adjustment frame 4, and the 600nm spectral image receiving camera 52 is connected to the third connecting cylinder 33 via the third translation adjustment frame 4.

[0036] Specifically, the lens assembly module 1 includes a first lens barrel 103, a second lens barrel 104, a third lens barrel 105, a fourth lens barrel 106, a fifth lens barrel 107, and a sixth lens barrel 108. The first lens barrel 103 and the second lens barrel 104 are coaxially connected. The upper end of the second lens barrel 104 is provided with a first connecting hole 1041. The lower end of the third lens barrel 105 is provided with a first shaft 1051, which is connected to the first connecting hole 1041. The end face of the third lens barrel 105 is provided with a second... The fourth lens barrel 106 has a second shaft 1061 on its end face facing the third lens barrel 105. The second shaft 1061 is connected to the second connecting hole. The two sides of the fourth lens barrel 106 are respectively provided with a third connecting hole (not shown) and a fourth connecting hole (not shown). The fifth lens barrel 107 and the sixth lens barrel 108 are respectively provided with a third shaft (not shown) and a fourth shaft (not shown). The third shaft is connected to the third connecting hole, and the fourth shaft is connected to the fourth connecting hole. The mechanical structure with concentric hole-shaft fit can improve the optical axis misalignment and lens assembly eccentricity between mechanical parts to a great extent. The hole-shaft fit can also resist the lateral shear force to a great extent, which can effectively improve the rigidity and coaxiality of the mechanical mating structure of the lens assembly.

[0037] The first top plate 101 is located at the end of the fourth lens barrel 106 away from the third lens barrel 105, one of the second top plates 102 is located on the side of the fifth lens barrel 107, and the other first top plate 101 is located on the end face of the sixth lens barrel 108.

[0038] The main optical path is as follows: the light passes through the first mirror tube 103, the second mirror tube 104, the total reflection mirror 12, the third mirror tube 105, the fourth mirror tube 106 and the first connecting tube 2, and is finally received by the full-band spectrum image receiving camera 53.

[0039] The optical path in the 500nm band is as follows: the light passes through the first mirror tube 103, the second mirror tube 104, the total reflection mirror 12, the third mirror tube 105, the 550nm long-pass dichroic mirror 15, the 520nm short-pass dichroic mirror 18, and the second connecting tube 32, and is finally received by the 500nm spectral image receiving camera 51.

[0040] The optical path in the 600nm band is as follows: the light passes through the first mirror tube 103, the second mirror tube 104, the total reflection mirror 12, the third mirror tube 105, the 600nm long-pass dichroic mirror 16, and the third connecting tube 33, and is finally received by the 500nm spectral image receiving camera 51.

[0041] Specifically, the third mirror tube 105 has a first mounting hole on its side, the first mounting hole is connected to a first rotating platform 11, and the first rotating platform 11 is connected to a total reflection mirror 12. The fourth lens barrel 106 has a second mounting hole and a third mounting hole on its side. The second mounting hole and the third mounting hole are respectively connected to a second rotating platform 13 and a third rotating platform 14. The second rotating platform 13 is connected to a first dichroic mirror, and the third rotating platform 14 is connected to a second dichroic mirror. The first dichroic mirror is a 550nm long-pass dichroic mirror 15, and the second dichroic mirror is a 600nm long-pass dichroic mirror 16. The fifth lens barrel 107 has a fourth mounting hole, which connects to a fourth rotating platform 17. The fourth rotating platform 17 is connected to a third dichroic mirror. The third dichroic mirror is a 520nm short-pass dichroic mirror 18. The first to fourth rotating platforms 17 are composed of an LB60 rotating platform from Guangzhou Base Optics Technology Co., Ltd., and a lens holder of model LFM2-A. Their adjustment range is 5° for the X and Y axes and 2mm for the Z axis height.

[0042] Specifically, there are four limiting bolts 71 and four first differential adjusters 72. The four limiting bolts 71 are located at the four corners of the first square flange 21, and the four first differential adjusters 72 are divided into two groups, located on both sides of the first square flange 21. Of the four limiting bolts 71, the outer walls of the two diagonally opposite limiting bolts 71 are also connected to fixing nuts 19 and pre-locking nuts 20. The fixing nuts 19 and pre-locking nuts 20 are located between the first square flange 21 and the first top plate 101, with one end face of the fixing nut 19 contacting the first top plate 101 and the pre-locking nut 20 contacting the first square flange 21. Before adjustment, the position of the fixing nut 19 on the outer wall of the limiting bolts 71 is pre-adjusted according to the axial distance of the optical path, so that the distance between the first square flange 21 and the first top plate 101 is maintained within a set range to ensure the axial distance of the optical path. During adjustment, the pre-locking nut 20 can be loosened. After rotating the first differential adjuster 72, the first connecting cylinder 2 can swing relative to the optical axis, achieving the purpose of adjusting the optical axis.

[0043] The connecting bolts 81 and the second differential adjusters 82 are provided in four parts each. The four second differential adjusters 82 are located at the four corners of the second square flange 31, and the four connecting bolts 81 are located at the center of the four sides of the second square flange 31.

[0044] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A long-baseline multi-fraction optical path multi-dimensional precision tuning lens adjustment structure, characterized in that: It includes a lens assembly module, a first connecting tube, a mounting tube, a translation adjustment frame, and an imaging camera; The mirror module has a main optical path output end and several sub-optical path output ends. The main optical path output end is connected to a first connecting cylinder, and each of the sub-optical path output ends is connected to a mounting cylinder. One end of the first connecting cylinder has a first square flange, and one end of the mounting cylinder has a second square flange. The other ends of the first connecting cylinder and the mounting cylinder are respectively provided with circular flanges. The first square flange is connected to the first connecting cylinder through a first adjustment mechanism, and the second square flange is connected to the mounting cylinder through a second adjustment mechanism. The circular flanges are connected to the translation adjustment frame via the third adjustment mechanism, and the translation adjustment frame is connected to the imaging camera. The first adjustment mechanism includes a limiting bolt and a first differential adjuster. The main optical path emission end is provided with a first top plate. One end of the limiting bolt passes through the first square flange and the first top plate and is connected to a nut. One end of the first differential adjuster passes through the first square flange and abuts against the first top plate. There are four limiting bolts and four first differential adjusters. The four limiting bolts are located at the four corners of the first square flange. The four first differential adjusters are divided into two groups and located on both sides of the first square flange. Among the four limiting bolts, the outer walls of the two limiting bolts located diagonally are also connected to fixing nuts and pre-locking nuts. The fixing nuts and pre-locking nuts are located between the first square flange and the first top plate, with one end face of the fixing nut contacting the first top plate and the pre-locking nut contacting the first square flange. The second adjustment mechanism includes a connecting bolt and a second differential adjuster. The sub-optical path output end is provided with a second top plate. One end of the connecting bolt passes through the second square flange and is connected to the second top plate. One end of the second differential adjuster passes through the second square flange and abuts against the second top plate. The third adjustment mechanism includes a tensioning bolt and a set screw. The circular flange has several arc-shaped grooves, each corresponding to a tensioning bolt. The tensioning bolt passes through the arc-shaped groove and connects to the translation adjustment frame. The set screw is threaded to the circular flange and passes through the circular flange to abut against the translation adjustment frame.

2. The long-baseline multi-fraction optical path multi-dimensional precision tuning lens adjustment structure as described in claim 1, characterized in that: The sub-optical path has two output ends and the imaging camera has three, namely a 500nm spectral image receiving camera, a 600nm spectral image receiving camera and a full-band spectral image receiving camera. The mounting cylinders are respectively the second connecting cylinder and the third connecting cylinder; The full-band spectral image receiving camera is connected to the first connecting cylinder via the first translation adjustment frame, the 500nm spectral image receiving camera is connected to the second connecting cylinder via the second translation adjustment frame, and the 600nm spectral image receiving camera is connected to the third connecting cylinder via the third translation adjustment frame.

3. The long-baseline multi-fraction optical path multi-dimensional precision tuning lens adjustment structure as described in claim 2, characterized in that: The lens assembly module includes a first lens barrel, a second lens barrel, a third lens barrel, a fourth lens barrel, a fifth lens barrel, and a sixth lens barrel. The first lens barrel and the second lens barrel are coaxially connected. The upper end of the second lens barrel is provided with a first connecting hole. The lower end of the third lens barrel is provided with a first shaft member, which is connected to the first connecting hole. The end face of the third lens barrel is provided with a second connecting hole. The end face of the fourth lens barrel facing the third lens barrel is provided with a second shaft member, which is connected to the second connecting hole. The two sides of the fourth lens barrel are respectively provided with a third connecting hole and a fourth connecting hole. The fifth lens barrel and the sixth lens barrel are respectively provided with a third shaft member and a fourth shaft member. The third shaft member is connected to the third connecting hole, and the fourth shaft member is connected to the fourth connecting hole. The first top plate is located at the end of the fourth lens tube away from the third lens tube, one of the second top plates is located on the side of the fifth lens tube, and the other of the first top plates is located on the end face of the sixth lens tube.

4. The long-baseline multi-fraction optical path multi-dimensional precision tuning lens adjustment structure as described in claim 3, characterized in that: The third mirror tube has a first mounting hole on its side, the first mounting hole is connected to a first rotating platform, and the first rotating platform is connected to a total reflection mirror. The fourth mirror tube has a second mounting hole and a third mounting hole on its side. The second mounting hole and the third mounting hole are respectively connected to a second rotating platform and a third rotating platform. The second rotating platform is connected to a first dichroic mirror, and the third rotating platform is connected to a second dichroic mirror. The fifth lens barrel has a fourth mounting hole, the fourth mounting hole is connected to a fourth rotating platform, and the fourth rotating platform is connected to a third dichroic mirror.

5. The long-baseline multi-fraction optical path multi-dimensional precision tuning lens adjustment structure as described in claim 1, characterized in that: The connecting bolts and the second differential adjusters are provided in four parts each. The four second differential adjusters are located at the four corners of the second square flange, and the four connecting bolts are located at the center of the four sides of the second square flange.

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