Perpendicularity adjusting device for heavy objective lens

Abstract

The utility model provides a kind of perpendicularity adjusting device for heavy load objective lens, including pedestal and bearing seat, the side of the pedestal is set in the upper of bearing seat and is provided with gap between bearing seat;The bearing seat and pedestal are connected respectively by centering mechanism, adjusting mechanism, orientation mechanism, limiting mechanism;The four corner positions of bearing include first angle, second angle, third angle and fourth angle, the first angle and third angle are diagonally set, the second angle and fourth angle are diagonally set;The centering mechanism and orientation mechanism are respectively set in first angle and third angle, and the centering mechanism cooperates orientation mechanism for realizing the centering of bearing seat relative to pedestal;The adjusting mechanism is at least set in one of second angle, fourth angle, for realizing the fine adjustment of objective lens and heavy load support;The limiting mechanism is used to limit the maximum angle when bearing seat is inclined relative to pedestal.

Description

Technical Field

[0001] This utility model relates to the field of optical instrument technology, specifically to a verticality adjustment device for a heavy-duty objective lens, and more particularly to a verticality adjustment device for a high-precision heavy-duty objective lens. Background Technology

[0002] High-precision microscope systems have wide applications in semiconductor testing, biomedical research, materials science, and precision manufacturing, demanding extremely high imaging resolution and positioning accuracy. As the core optical component of a microscope, the positioning accuracy and stability of the objective lens directly affect image quality and repeatability. The installation and adjustment of heavy-duty objectives place higher demands on the structural rigidity, load-bearing capacity, and anti-tipping performance of the mechanism. Especially in the use of heavy-duty objectives or combined objective systems, due to the large weight and complex structure of the microscope body, conventional adjustment mechanisms often struggle to simultaneously achieve high-precision fine-tuning, stable load-bearing capacity, and reliable positioning.

[0003] Chinese patent CN220252273U discloses a microscope objective lens adjustment mechanism, relating to the field of optical microscopy imaging technology. The mechanism includes a microscope base and a microscope tube. An arm is fixed to the base. An objective lens is mounted at the lower end of the microscope tube, and an eyepiece is mounted at the upper end. The arm has a movable adjustment plate, at least three set screws, and at least three through-holes. Adjusting screws are installed within the through-holes, with a clearance fit between the screws and the holes. The heads of the adjusting screws abut against the upper surface of the arm, and the lower ends of the screws are threaded to the adjustment plate. A spring is fitted onto the adjusting screw, with the upper end of the spring abutting against the arm and the lower end against the adjustment plate. The set screws are threaded to the arm, with a gap between the lower end of the set screw and the adjustment plate, and the set screws can be screwed until their lower ends abut against the adjustment plate. The adjustment plate has a insertion hole through which the microscope tube passes from top to bottom in a movable fit. The adjustment plate also has locking bolts for securing the microscope tube.

[0004] Traditional objective lens adjustment devices often rely on simple threaded structures or spring preload for coarse adjustment and fixation, which suffers from problems such as large return clearance, insufficient rigidity, and susceptibility to external interference, resulting in poor adjustment repeatability and insufficient stability. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a verticality adjustment device for heavy-duty objective lenses.

[0006] According to the present invention, a verticality adjustment device for heavy-duty objective lenses includes a base and a support, wherein one side of the base is disposed above the support and a gap is provided between the base and the support. The bearing seat and the base are connected by a centering mechanism, an adjustment mechanism, an orientation mechanism, and a limiting mechanism, respectively. The four corner positions of the support include a first corner, a second corner, a third corner, and a fourth corner, with the first corner and the third corner being diagonally opposite each other, and the second corner and the fourth corner being diagonally opposite each other; The centering mechanism and the orientation mechanism are respectively located at the first corner and the third corner. The centering mechanism works in conjunction with the orientation mechanism to achieve the centering of the bearing seat relative to the base. The adjustment mechanism is located at least in one of the second and fourth corners, and is used to achieve fine adjustment and heavy-duty support of the objective lens; The limiting mechanism is used to limit the maximum angle when the bearing seat is tilted relative to the base.

[0007] Preferably, the centering mechanism includes a first precision steel ball, which is disposed in a circular hole opened on the surface of the bearing seat, and the first precision steel ball matches the conical surface of the base.

[0008] Preferably, the adjustment mechanism includes a fine-tuning screw, a spherical washer, a conical washer, a first disc spring, and a fine-tuning nut. The conical washer and the spherical washer are sequentially disposed in the countersunk holes of the base, and the first disc spring is disposed in the first countersunk hole of the bearing seat. The threaded end of the fine-tuning screw passes through a spherical washer, a conical washer, and a first disc spring in sequence before engaging with the fine-tuning nut on the bearing seat.

[0009] Preferably, the spherical surface of the spherical gasket matches the conical surface of the conical gasket.

[0010] Preferably, the two ends of the first disc spring abut against the bottom of the first countersunk hole of the base and the bearing seat respectively through the first precision washer.

[0011] Preferably, the first disc spring is composed of multiple disc springs connected in series.

[0012] Preferably, the orientation mechanism includes a second precision steel ball and a compression spring. One end of the compression spring abuts against the bottom of the second countersunk hole of the bearing seat, and the other end of the compression spring abuts against the second precision steel ball, which is connected to the base.

[0013] Preferably, the limiting mechanism includes a second disc spring and a limiting screw. The second disc spring is disposed in the third countersunk hole of the bearing seat, and the threaded end of the limiting screw passes through the through hole of the base and the second disc spring in sequence and then engages with the threaded hole of the bearing seat.

[0014] Preferably, the two ends of the second disc spring abut against the bottom of the third countersunk hole of the base and the bearing seat respectively through the second precision washer.

[0015] Preferably, the second disc spring is composed of multiple disc springs connected in series.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model achieves high-precision fine adjustment of the objective lens by setting a centering mechanism, an orientation mechanism, and an adjustment mechanism to eliminate backlash, and ensures extremely high stability after adjustment; 2. This utility model provides a huge load support capacity for heavy-duty objectives by setting both the adjustment mechanism and the limiting mechanism to include a unique series combination of disc springs and precision shims. 3. This utility model provides a basic fine transmission ratio by using a fine-threaded fine-tuning screw. A constant axial preload is applied by setting a disc spring group at the bottom of the fine-tuning screw. This preload always acts on the fine-tuning screw. No matter whether the fine-tuning screw rotates forward or backward, the thread surface can maintain close contact, thereby completely eliminating the backlash and realizing high-precision fine-tuning and heavy-duty support of the objective lens. 4. This utility model has a compact overall structure and sufficient rigidity, which can effectively resist external vibration and force interference, ensuring reliability for long-term use; 5. This utility model supports both manual and tool-based adjustment methods and features a locking and anti-fall-off structure, making adjustment convenient and safe. 6. This utility model has good compatibility and versatility: the standardized interface design enables it to be quickly adapted to a variety of objectives and converters, which greatly improves the functionality and working efficiency of the microscope system. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is an assembly drawing of the verticality adjustment device, which is the main feature of this utility model. Figure 2 This is a cross-sectional view of the structure of the centering mechanism, which is the main feature of this utility model. Figure 3 This is a cross-sectional view of the main structure of the adjustment mechanism of this utility model; Figure 4 This is a cross-sectional view of the structure of the orientation mechanism, which is the main feature of this utility model. Figure 5 This is a cross-sectional view of the structure of the limiting mechanism, which is the main feature of this utility model.

[0018] In the picture: Base A; Bearing seat B; Centering mechanism B1; First precision steel ball 71; Adjustment mechanism B2; Fine-tuning screw 1; 2. Spherical washer; 3. Conical washer; 41. First precision washer; 51. First disc spring; 6. Fine-tuning nut; Orientation mechanism B3; Second precision steel ball 72; Compression spring 8; Limiting mechanism B4; Limiting screw 9; Second precision gasket 42; Second disc spring 52 Detailed Implementation The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0019] like Figure 1 As shown, the present invention provides a verticality adjustment device for heavy-duty objectives, comprising a base A and a support B. The base A is fixed to the corresponding position on a microscope or other equipment via its side positioning edge and mounting screw through-holes, providing a stable support foundation for the entire device. The support B is used to mount the objective lens and integrates the adjustment function. A gap is provided between the support B and the base A, which provides necessary allowance for verticality adjustment and also compensates for errors generated during parts processing and assembly.

[0020] The support B and the base A are connected by a centering mechanism B1, an adjustment mechanism B2, an orientation mechanism B3, and a limiting mechanism B4. The four corners of the support B include a first corner, a second corner, a third corner, and a fourth corner, with the first and third corners diagonally opposite each other, and the second and fourth corners also diagonally opposite each other. The centering mechanism B1 and the orientation mechanism B3 are respectively located at the first and third corners, and the centering mechanism B1, in conjunction with the orientation mechanism B3, is used to center the support B relative to the base A. The adjustment mechanism B2 is located at least at one of the second or fourth corners, and is used for fine-tuning and heavy-duty support of the objective lens. The limiting mechanism B4 is used to limit the maximum angle at which the support B tilts relative to the base A.

[0021] like Figure 2 As shown, the centering mechanism B1 includes a first precision steel ball 71, which is disposed in a circular hole on the surface of the bearing seat B. The first precision steel ball 71 matches the conical surface of the base. The first precision steel ball 71 cooperates with the conical positioning features at both ends of the base A and the bearing seat B to jointly determine the overall reference of the device and ensure the initial centering accuracy.

[0022] like Figure 3As shown, the adjustment mechanism B2 is the core for fine-tuning. It includes a fine-tuning screw 1, a spherical washer 2, a conical washer 3, a first precision washer 41, a first disc spring 51, and a fine-tuning nut 6. The conical washer 3 and the spherical washer 2 are sequentially placed inside the countersunk hole of the base A, and the first disc spring 51 is placed inside the first countersunk hole of the bearing seat B. The threaded end of the fine-tuning screw 1 passes through the spherical washer 2, the conical washer 3, and the first disc spring 51 in sequence before threadedly engaging with the fine-tuning nut 6 on the bearing seat B. The two ends of the first disc spring 51 abut against the bottom of the first countersunk hole of the base A and the bearing seat B respectively through the first precision washer 41.

[0023] The fine-tuning screw 1 employs a full-thread precision thread pair, providing a basic fine transmission ratio. Its top is equipped with a hand-tightening nut and an internal hexagonal socket, supporting both manual fine-tuning and tool-based adjustments for convenient operation. A constant axial preload is applied by the first disc spring 51 at the bottom of the fine-tuning screw 1. This preload always acts on the thread pair, ensuring tight contact between the thread surfaces regardless of whether the fine-tuning screw 1 rotates clockwise or counterclockwise. This completely eliminates backlash, achieving high-precision fine-tuning and heavy-duty support for the objective lens.

[0024] The spherical shim 2 and the conical shim 3 are used together. The spherical surface of the spherical shim 2 matches the conical surface of the conical shim 3 to form a self-positioning function, which can ensure that the fine-tuning screw 1 always remains axially tight during the rotation adjustment process and avoids radial movement that may cause loosening.

[0025] The first precision shim 41 and the first disc spring 51 are combined in series. This design increases the effective adjustment distance and provides a continuous and stable axial preload throughout the entire stroke range to eliminate the backlash between the fine-tuning screw and the fine-tuning nut. It also provides a larger load, enabling the carrier to stably support heavier objective lens assemblies.

[0026] The internal thread of the fine-tuning nut 6 is precisely fitted with the fine-tuning screw 1, and its external thread is a fine thread, used to fix the fine-tuning screw 1 to the bearing seat B. The bearing seat B has a locking thread hole on its side, which can be tightened by screwing in a screw to effectively prevent the fine-tuning nut 6 from flipping or falling off during use.

[0027] like Figure 4 As shown, the orientation mechanism B3 includes a second precision steel ball 72 and a compression spring 8. One end of the compression spring 8 abuts against the bottom of the second countersunk hole of the bearing seat B, and the other end of the compression spring 8 abuts against the second precision steel ball 72. The second precision steel ball 72 is connected to the base A. The compression spring 8 can provide a constant clamping force throughout its stroke, ensuring stable contact between the second precision steel ball 72 and the machining guide surface, preventing axial movement during adjustment, and ensuring that the bearing seat B moves only along its axial direction, achieving high straightness guidance.

[0028] like Figure 5 As shown, the limiting mechanism B4 includes a second precision washer 42, a second disc spring 52, and a limiting screw 9. The second disc spring 52 is disposed in the third countersunk hole of the support B. The threaded end of the limiting screw 9 passes through the through hole of the base A and the second disc spring 52 in sequence, and then engages with the threaded hole of the support B. This is used to limit the maximum angle when the support B is tilted relative to the base A, preventing over-adjustment from causing structural damage or loss of precision. The second disc spring 52 is composed of multiple disc springs connected in series. The combination of the second precision washer 42 and the second disc spring 52 provides a huge load support capacity, which is specially designed for heavy-duty objectives.

[0029] The carrier B provides standardized adapter features and corresponding adapter hole features, which can support the quick installation and replacement of a single heavy-duty objective lens or a multi-objective converter, improving the compatibility and efficiency of the equipment.

[0030] The perpendicularity adjustment device of this invention employs a centering mechanism B1 in conjunction with an orientation mechanism B3, achieving automatic centering through the engagement of precision steel balls and a conical surface. A limiting mechanism B4 restricts the maximum adjustment angle. The adjustment mechanism B2 uses a series combination of a fine-tuning screw and a disc spring, along with a self-positioning structure of a spherical washer 2 and a conical washer 3, providing constant axial preload throughout the entire stroke range. This effectively eliminates thread backlash and achieves high-precision, lag-free perpendicularity fine-tuning. This perpendicularity adjustment device features high rigidity, high load capacity, and excellent anti-interference capabilities, making it suitable for the rapid installation and stable adjustment of heavy-duty objectives or multi-objective turrets, significantly improving the positioning accuracy and reliability of microscope systems.

[0031] The verticality adjustment device of this invention has a standardized interface and quick assembly / disassembly capability, which can meet the requirements of modern microscope systems that often need to be compatible with multiple objectives or quickly change modules. Compared with most current adjustment mechanisms that still rely on manual experience for repeated adjustments and lack integrated centering, limiting and orientation mechanisms, the adjustment device of this invention has high installation efficiency and low operation complexity.

[0032] The adjustment device of this invention balances fine-tuning accuracy with load support, offering controllability, especially when fine-tuning in the vertical direction is required, while also ensuring the coaxiality of the optical system. This vertical adjustment device provides high precision, hysteresis-free adjustment, convenient fine-tuning, and good repeatability and stability, thus improving the overall performance and reliability of the microscope system.

[0033] The overall assembly and specific structural relationship of the verticality adjustment device: Pre-assembly of Mount B: Mount B serves as the mounting platform and adjustment body for the objective lens. The sub-mechanisms need to be assembled first, including the centering mechanism B1, the adjustment mechanism B2, the orientation mechanism B3, and the limiting mechanism B4. The assembly process must be carried out strictly in accordance with the design requirements to ensure the fit accuracy between the components and the overall performance of the device.

[0034] Installation of adjustment mechanism B2: First, screw the fine-tuning nut 6 into the threaded hole of the bearing seat B. The external thread of the fine-tuning nut 6 is a fine thread, which fits tightly with the threaded hole of the bearing seat B. By screwing the set screw into the locking threaded hole on the side of the bearing seat B, the loosening nut 6 can be effectively prevented from falling off, ensuring the stability of the adjustment.

[0035] The first disc spring 51 and the first precision washer 41 are placed in the countersunk hole of the bearing seat B in sequence. The first disc spring 51 is placed in series to provide sufficient load support capacity and elastic deformation.

[0036] Place the conical shim 3 and the spherical shim 2 into the countersunk hole of the base A to prepare for subsequent centering and adjustment operations.

[0037] Centering mechanism B1 installation: Insert the first precision steel ball 71 into the round hole of the bearing seat B.

[0038] The assembled support B is placed on the corresponding conical positioning feature on the base A, corresponding to the two first precision steel balls 71. Under the action of gravity, the first precision steel balls 71 will automatically center with the conical surfaces of the base A and support B, initially establishing the reference of the device and ensuring the initial alignment of the objective lens.

[0039] Screw the threaded end of the fine-tuning screw 1 into the fixed fine-tuning nut 6, and screw the fine-tuning screw 1 in so that the spherical washer 2 at its end contacts the bearing surface on the base A, providing a support point for subsequent verticality adjustment. The fine-tuning screw 1 adopts a full-thread precision thread pair to ensure smooth adjustment without backlash, improving the accuracy and reliability of the adjustment.

[0040] Orientation Mechanism B3 Installation: Install orientation mechanism B3 in holes at different positions on the support base B than on the centering mechanism B1 and the adjusting mechanism B2. The specific operation is as follows: Place the compression spring 8 at the bottom of the hole, then insert the second precision steel ball 71. The compression spring 8 will continuously push the second precision steel ball 71 upwards, maintaining a constant point contact pressure between it and the corresponding smooth surface on the base A. This provides stable positioning, prevents the support base B from rotating in the horizontal plane, and ensures the orientation accuracy of the device.

[0041] Installation of limiting mechanism B4: In the bearing seat B, the second disc spring 52 and the second precision shim 42 are placed into the countersunk hole. Then, the limiting screw 9 is passed through the through hole of the base A and screwed into the threaded hole of the bearing seat B. By turning the limiting screw 9, the gap between the bearing seat B and the base A at that point can be adjusted, thereby limiting the maximum tilt angle of the bearing seat B relative to the base A during the adjustment process, playing an overload protection role and preventing damage to the device due to excessive adjustment.

[0042] Final assembly and clearance setting: After completing the above assembly, gently lower the support seat B so that it contacts the base A through the centering mechanism B1, the orientation mechanism B3, and the adjustment mechanism B2. At this time, there should be a small, uniform horizontal gap between the support seat B and the base A. This gap is ensured by precision machining and the pre-compression of the first disc spring 51 and the second disc spring 52, providing the necessary space for verticality adjustment and compensating for the machining errors of the parts, ensuring the accuracy and stability of the adjustment.

[0043] Objective lens installation and adjustment: Objective lens installation: Secure the heavy-duty objective lens or standardized objective lens adapter plate to the standardized adapter features and adapter holes provided on the top of the carrier B using screws. During installation, ensure that the screws are tightened to a moderate torque to avoid damaging the objective lens or adapter plate due to overtightening, or causing the objective lens to loosen due to overloosening.

[0044] Coarse verticality adjustment: Thanks to the centering mechanism B1, the objective lens has achieved initial alignment. After mounting the objective lens, a simple verticality check can be performed to confirm its approximate verticality, preparing for subsequent fine-tuning.

[0045] Verticality fine-tuning: The operator can make fine adjustments by hand-tightening the hand nut on top of the fine-tuning screw 1, or by inserting an Allen wrench into the Allen hole on top of it. Rotating the fine-tuning screw 1 clockwise or counterclockwise will cause it to move forward or backward in the fine-tuning nut 6 through the precision thread pair.

[0046] The axial movement of the fine-tuning screw 1 is transformed into a smooth lifting or lowering of one corner of the support seat B through the self-positioning combination of the spherical shim 2 and the conical shim 3. Since the other two points are supported by the centering mechanism B1 and the orientation mechanism B3, the tilt angle of the support seat B relative to the base A can be precisely changed by adjusting the adjustment mechanism B2, thereby achieving high-precision fine-tuning of the objective lens perpendicularity.

[0047] During the adjustment process, the fine-tuning screw 1 should be rotated slowly, and the change in the perpendicularity of the objective lens should be observed in real time to ensure the accuracy of the adjustment.

[0048] Eliminating backlash and maintaining preload: Throughout the adjustment process, the first disc spring 51 and the second disc spring 52 are always in a compressed state, providing axial preload force throughout the entire stroke. This preload force not only eliminates the backlash of the threaded pair, ensuring the accuracy and repeatability of the adjustment, but its series design also provides a huge load support capacity, which can stably support the weight of heavy-duty objectives, prevent them from falling due to their own weight, and ensure the long-term stability and reliability of the device.

[0049] Locking and Use: After adjusting to the required precision, no additional locking operation is required, and the entire system can remain stable under the preload. To prevent accidental activation, tighten the set screw next to the fine-tuning nut 6, and then you can use the microscope for observation normally.

[0050] Key components and process requirements: Base A and bearing B: Made of high-strength aluminum alloy by precision CNC machining to ensure structural rigidity and dimensional stability; key positioning surfaces need to be ground to achieve high flatness and low surface roughness.

[0051] First precision steel ball 71 and second precision steel ball 72: G10 grade bearing steel balls are used to ensure the accuracy of centering and orientation.

[0052] Fine-tuning screw 1 and fine-tuning nut 6: The threaded pair is recommended to be manufactured using a precision rolling process with a precision grade of not less than 6g / 6H to ensure smooth transmission and no backlash.

[0053] The first disc spring 51 and the second disc spring 52 are made of alloy spring steel and have undergone heat treatment and surface anti-corrosion treatment. The stiffness and preload of their combination (in series) need to be accurately calculated to meet the load and stroke requirements.

[0054] First precision gasket 41 and second precision disc 42: Made of high carbon steel and ground to ensure parallelism and surface finish, thereby reducing friction and wear.

[0055] Through the above specific implementation scheme, the high-precision, high-stability, and high-load objective lens perpendicularity adjustment device described in this utility model can be completely constructed and operated.

[0056] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A perpendicularity adjustment device for heavy-duty objective lenses, characterized in that, It includes a base (A) and a support (B), wherein one side of the base (A) is disposed above the support (B) and there is a gap between the base (A) and the support (B); The bearing seat (B) and the base (A) are connected by a centering mechanism (B1), an adjustment mechanism (B2), an orientation mechanism (B3), and a limiting mechanism (B4), respectively. The four corner positions of the support (B) include a first corner, a second corner, a third corner and a fourth corner, with the first corner and the third corner being diagonally opposite each other, and the second corner and the fourth corner being diagonally opposite each other; The centering mechanism (B1) and the orientation mechanism (B3) are respectively located at the first corner and the third corner. The centering mechanism (B1) works in conjunction with the orientation mechanism (B3) to achieve the centering of the bearing seat (B) relative to the base (A). The adjustment mechanism (B2) is provided at least in one of the second and fourth corners to achieve fine adjustment and heavy load support of the objective lens; The limiting mechanism (B4) is used to limit the maximum angle at which the bearing seat (B) tilts relative to the base (A).

2. The perpendicularity adjustment device for heavy-duty objective lenses as described in claim 1, characterized in that, The centering mechanism (B1) includes a first precision steel ball (71), which is disposed in a circular hole on the surface of the bearing seat (B) and matches the conical surface of the base.

3. The perpendicularity adjustment device for heavy-duty objective lenses as described in claim 1, characterized in that, The adjustment mechanism (B2) includes a fine-tuning screw (1), a spherical washer (2), a conical washer (3), a first disc spring (51), and a fine-tuning nut (6). The conical washer (3) and the spherical washer (2) are sequentially arranged in the countersunk hole of the base (A), and the first disc spring (51) is arranged in the first countersunk hole of the bearing seat (B). The threaded end of the fine-tuning screw (1) passes through the spherical washer (2), the conical washer (3), and the first disc spring (51) in sequence, and then engages with the fine-tuning nut (6) on the bearing seat (B).

4. The perpendicularity adjustment device for heavy-duty objective lenses as described in claim 3, characterized in that, The spherical surface of the spherical gasket (2) matches the conical surface of the conical gasket (3).

5. The perpendicularity adjustment device for heavy-duty objective lenses as described in claim 3, characterized in that, The two ends of the first disc spring (51) abut against the bottom of the first countersunk hole of the base (A) and the bearing seat (B) respectively through the first precision washer (41).

6. The perpendicularity adjustment device for heavy-duty objectives as described in claim 3, characterized in that, The first disc spring (51) is composed of multiple disc springs connected in series.

7. The perpendicularity adjustment device for heavy-duty objective lenses as described in claim 1, characterized in that, The orientation mechanism (B3) includes a second precision steel ball (72) and a compression spring (8). One end of the compression spring (8) abuts against the bottom of the second countersunk hole of the bearing seat (B), and the other end of the compression spring (8) abuts against the second precision steel ball (72). The second precision steel ball (72) is connected to the base (A).

8. The perpendicularity adjustment device for heavy-duty objective lenses as described in claim 1, characterized in that, The limiting mechanism (B4) includes a second disc spring (52) and a limiting screw (9). The second disc spring (52) is disposed in the third countersunk hole of the bearing seat (B). The threaded end of the limiting screw (9) passes through the through hole of the base (A) and the second disc spring (52) in sequence and then engages with the threaded hole of the bearing seat (B).

9. The perpendicularity adjustment device for heavy-duty objectives as described in claim 8, characterized in that, The two ends of the second disc spring (52) abut against the bottom of the third countersunk hole of the base (A) and the bearing seat (B) respectively through the second precision washer (42).

10. The perpendicularity adjustment device for heavy-duty objectives as described in claim 8, characterized in that, The second disc spring (52) is composed of multiple disc springs connected in series.

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