Microscope coaxial structure

Abstract

This invention discloses a coaxial microscope structure, comprising a main body, a tube lens assembly, a mirror assembly, and a camera assembly. The main body has an internal cavity through which light can pass. The tube lens assembly is disposed within the cavity of the main body and is horizontally movable relative to the main body, allowing light to enter the cavity through it. The mirror assembly is movably disposed on the main body along the optical path and reflects the light entering from the tube lens assembly. The camera assembly is disposed on one side of the main body along the optical path to receive the light reflected by the mirror assembly. This coaxial microscope structure, by incorporating a movable tube lens assembly, facilitates the coaxial arrangement of the tube lens and objective lens. The position of the mirror assembly can also be adjusted to accurately adjust the angle of the reflected light, thereby ensuring the coaxiality of the optical path in a microscope where the objective lens and tube lens are separate. The coaxiality of the objective lens, tube lens, and camera no longer depends on the precision of mechanical processing.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, specifically relating to a coaxial structure for a microscope. Background Technology

[0002] Currently, the optical systems of coaxial microscopes typically rely on mechanical structures to ensure coaxiality. The three core optical components—objective, tube, and camera—are fixed to the microscope body via threaded connections, while the various structural components are assembled using mechanical fits such as threads, sleeves, or dovetail joints. This design is highly dependent on the precision of machining, resulting in extremely stringent requirements for the machining tolerances of individual structural components. For example, the fit between the shaft sleeve and the camera connecting sleeve requires extremely high concentricity; even a slight deviation between the slider and the groove can cause optical axis misalignment, reducing image sharpness. Furthermore, to reduce assembly errors, precision adjustment mechanisms such as micrometers are often introduced, further increasing the complexity of the structure and manufacturing costs.

[0003] In microscope designs where the objective lens and tube lens are separate (such as some dual-field systems or vacuum coaxial microscopes), ensuring coaxiality is more difficult due to the lack of direct structural connections. Such systems typically rely on optical elements such as beam splitters and mirrors for optical path integration. However, if there is an angular deviation in the optical path, a significant discrepancy will occur between the pre-observation area and the actual measurement area.

[0004] Furthermore, the assembly and calibration of current coaxial microscopes heavily rely on the operator's experience. Debugging personnel must repeatedly adjust mechanical components to calibrate the optical path, a tedious and inefficient process. For example, in component assembly, coaxiality errors must be measured and end-face machining adjustments calculated for correction. This human intervention not only introduces uncertainty but also leads to variations between devices, making standardized production difficult. For complex systems, specialized personnel are required to adjust the mirror angles to switch modes, further increasing the barrier to entry.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a coaxial structure for a microscope, which can adjust the position of the tube end assembly relative to the objective lens and the angle of the mirror assembly to achieve coaxiality of the optical path in a microscope where the objective lens and tube end are separate.

[0007] To achieve the above objectives, a specific embodiment of this utility model provides the following technical solution: A coaxial microscope structure includes a main body, a microscope tube assembly, a mirror assembly, and a camera assembly. The main body has an internal cavity through which light can pass; the microscope tube assembly is disposed within the cavity of the main body and is horizontally movable relative to the main body, allowing light to enter the cavity through the microscope tube assembly; the mirror assembly is movably disposed on the main body along the optical path and reflects the light entering from the microscope tube assembly; the camera assembly is disposed on one side of the main body along the optical path to receive the light reflected by the mirror assembly.

[0008] In one or more embodiments of the present invention, the main body is provided with a plurality of first fixing set screws and first adjusting set screws in the circumferential direction. The first fixing set screws and first adjusting set screws abut against the endoscope assembly to fix and adjust the endoscope assembly.

[0009] In one or more embodiments of this utility model, the plurality of first fixing set screws are fixedly disposed on the main body, and a first elastic member is disposed between each first fixing set screw and the endoscope assembly. One end of the first elastic member abuts against the side wall of the endoscope assembly, and the other end is fixed to the first fixing set screw, and the first elastic member is always in a compressed state; one end of the first adjusting set screw abuts against the endoscope assembly, and the first adjusting set screw can move closer to or further away from the endoscope assembly to move the endoscope assembly; each first adjusting set screw is provided with a self-locking structure.

[0010] In one or more embodiments of this utility model, the first fixing set screw and the first adjusting set screw are symmetrically arranged on both sides of the main body along the circumference of the main body.

[0011] In one or more embodiments of this invention, the reflector assembly includes a reflector and a mounting base. The mounting base is movably connected to the side wall of the main body to adjust the angle of the reflector.

[0012] In one or more embodiments of this utility model, the mounting base is movably connected to the main body via a plurality of second fixing screws and a plurality of second adjusting screws. The second fixing screws pass through the mounting base and are fixed relative to the main body, while the second adjusting screws pass through the mounting base and are movable relative to the mounting base.

[0013] In one or more embodiments of this utility model, a second elastic element is provided on the second fixing set screw, one end of the second elastic element abuts against the mounting base, and the other end is connected to the second fixing set screw, and the elastic force of the second elastic element causes the mounting base to abut against the main body; the end of the second adjusting set screw abuts against the main body, and each second adjusting set screw is provided with a self-locking structure.

[0014] In one or more embodiments of this utility model, the plurality of second fixing screws and the plurality of second adjusting screws are arranged sequentially at intervals along the circumference of the mounting base.

[0015] In one or more embodiments of the present invention, the endoscope assembly includes an endoscope and a sleeve; the endoscope is disposed inside the sleeve and the first fixing set screw and the first adjusting set screw abut against the sleeve; wherein, a plurality of abutting planes are provided on the side wall of the sleeve along its circumference, and the first fixing set screw and the first adjusting set screw abut against the abutting planes.

[0016] In one or more embodiments of this utility model, the camera assembly includes a camera sleeve and a camera. One end of the camera sleeve is connected to the main body and located in the optical path; the camera is disposed at the other end of the camera sleeve; wherein a lens group is disposed inside the camera sleeve.

[0017] Compared with existing technologies, the coaxial microscope structure of this invention, by setting a movable tube-eye assembly and using a first adjusting set screw and a first fixing set screw to fix and adjust the tube-eye, makes it easier to achieve coaxial setup of the tube-eye and objective lens. The reflecting mirror assembly can also be moved, and the angle of the reflecting mirror can be adjusted by adjusting the second adjusting set screw and the second fixing set screw, achieving accurate adjustment of the angle of reflected light, thereby ensuring the coaxiality of the optical path in the microscope with the objective lens and tube-eye separated. With this setting, the coaxiality of the objective lens, tube-eye, and camera no longer depends on the precision of machining, which can reduce machining costs. At the same time, different microscopes can use the same set of tooling for debugging, reducing the differences between equipment and avoiding the impact of batch differences in machined parts. In addition, the adjustment of this coaxial microscope structure is simpler, thereby reducing the requirements for the debugging skills of technicians. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a first perspective view of the coaxial structure of a microscope in one embodiment of the present invention;

[0020] Figure 2 This is a second perspective view of the coaxial structure of a microscope in one embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the coaxial structure of a microscope in one embodiment of the present invention;

[0022] Figure 4 This is a top view of the coaxial structure of a microscope in one embodiment of the present invention;

[0023] Figure 5 for Figure 4 A sectional view along the AA axis.

[0024] Explanation of key figure labels:

[0025] 1-Main body, 11-Cavity, 2-Pipe assembly, 21-Pipe, 22-Sleeve, 221-Abutting plane, 3-Reflector assembly, 31-Reflector, 32-Mounting base, 4-Camera assembly, 41-Camera sleeve, 42-Camera, 43-Lens group, 5-First adjusting screw, 6-First fixing screw, 61-First elastic element, 7-Second adjusting screw, 8-Second fixing screw, 81-Second elastic element. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0027] In microscopes with separate objectives and tubes, when light enters through the objective, passes through the tube, and forms an image at the center of the camera's target surface, the optical axes of the objective, tube, and camera can be considered coaxial, meaning the optical paths are coaxial. In this type of microscope, the objective and tube are located on separate structures and then assembled onto the same housing or base, with no direct physical contact between them. Due to the lack of direct structural connections, after installation, light cannot propagate coaxially among the three components, thus affecting microscopic observation.

[0028] like Figures 1-5 As shown, a coaxial microscope structure according to one embodiment of the present invention includes a main body 1, a microscope assembly 2, a mirror assembly 3, and a camera assembly 4. The main body 1 has an internal cavity 11 through which light can pass. The microscope assembly 2 is disposed within the cavity 11 of the main body 1 and can move horizontally relative to the main body 1; light enters the cavity 11 from the microscope assembly 2. The mirror assembly 3 travels along the optical path (…). Figure 5The path indicated by the middle arrow a) is movably mounted on the main body 1 and can reflect light entering from the tube lens assembly 2. The camera assembly 4 is positioned on one side of the main body 1 along the optical path to receive light reflected by the mirror assembly 3, that is, the light is imaged at the camera assembly 4, and the camera assembly 4 can observe the sample at the objective lens.

[0029] Specifically, the main body 1 is roughly L-shaped, and the lens assembly 2 is vertically positioned at one end of the main body 1. The lens assembly 2 moves horizontally within the main body 1. The mirror assembly 3 is positioned along the light path at the bottom of the side wall of the main body 1. The camera assembly 4 is horizontally positioned at the other end of the main body 1, thus creating an L-shaped light path within the main body 1.

[0030] In the above embodiment, a phase contrast ring is provided on the objective lens. When the phase contrast ring is located at the center of the target surface of the camera assembly 4, it means that the optical paths of the objective lens, the tube mirror assembly 2, and the camera assembly 4 are coaxially aligned, meaning that the sample at the objective lens can be observed. When using the microscope, the objective lens is first mounted on the microscope, with the objective lens close to the end of the microscope where the tube mirror assembly 2 is located in the coaxial structure. Since the objective lens and the tube mirror assembly 2 are not in direct contact, they are not coaxial. The tube mirror assembly 2 is movably disposed within the cavity 11 of the main body 1, allowing it to move within the cavity 11 to adjust its position relative to the objective lens in the horizontal direction, making the tube mirror assembly 2 coaxial with the objective lens. When the objective lens and the tube mirror assembly 2 are coaxial, light passes sequentially through the objective lens and the tube mirror assembly 2 to the mirror assembly, and then the light is reflected to the camera assembly 4. At this time, the optical path of the reflected light may also be coaxial with the camera assembly 4. Since the reflector assembly 3 can also be movably mounted on the main body 1, the position or tilt angle of the reflector assembly 3 can be adjusted, so that the angle of light reflection changes, thereby making the light path coaxial with the camera assembly 4, and realizing the coaxiality of the light path between the objective lens, the tube lens assembly 2 and the camera assembly 4.

[0031] This coaxial microscope structure, through the inclusion of a movable endoscope assembly 2 and a reflecting mirror assembly 3, allows adjustment of the position of the endoscope assembly 2 relative to the objective lens, while simultaneously adjusting the angle of the reflecting mirror assembly 3. This enables coaxiality of the optical path within a microscope where the objective lens and endoscope are separate. Achieving coaxiality among the objective lens, endoscope assembly 2, and camera assembly 4 no longer relies on machining precision, simplifying the adjustment process.

[0032] In one implementation, such as Figure 1 , Figure 3 and Figure 4As shown, the main body 1 is circumferentially provided with multiple first fixing screws 6 and first adjusting screws 5. The first fixing screws 6 and first adjusting screws 5 abut against the endoscope assembly 2 to adjust and fix the endoscope assembly 2. Specifically, the first fixing screws 6 are used to fix the position of the endoscope assembly 2, and the first adjusting screws 5 are used to move the endoscope assembly 2. It can be understood that when the endoscope assembly 2 is vertically positioned at one end of the main body 1, the first adjusting screws 5 and first fixing screws 6 are used to move the endoscope assembly 2 horizontally.

[0033] Specifically, multiple first adjusting screws 5 and first fixing screws 6 abut against the endoscope assembly 2, thereby applying pressure to the endoscope assembly 2 in the horizontal direction and clamping it horizontally. The multiple first fixing screws 6 are fixed to the body 1 circumferentially, and a first elastic member 61 is provided between the first fixing screws 6 and the endoscope assembly 2. One end of the first elastic member 61 abuts against the side wall of the endoscope assembly 2, and the other end is fixed to the first fixing screw 6. Furthermore, the first elastic member 61 is always in a compressed state, thus always possessing elastic force to abut against the endoscope assembly 2 together with the first adjusting screws 5.

[0034] One end of the first adjusting screw 5 abuts against the endoscope assembly 2. The first adjusting screw 5 can move closer to or further away from the endoscope assembly 2, thereby adjusting the pressure applied to the endoscope assembly 2 and thus adjusting its position. It is understood that the first adjusting screw 5 is provided with a self-locking structure, so that its position can be locked after it has moved.

[0035] The adjustment method of the first fixing screw 6 and the first adjusting screw 5 for the position of the endoscope assembly 2 is as follows: First, both the first fixing screw 6 and the first adjusting screw 5 apply pressure to the endoscope assembly 2, thereby fixing the endoscope assembly 2 within the cavity 11 of the main body 1. When the user moves the first adjusting screw 5 closer to the endoscope assembly 2, the first adjusting screw 5 moves towards the main body 1, thereby compressing the elastic element on the first fixing screw 6, and the endoscope assembly 2 moves in the direction in which the first elastic element 61 is compressed. Conversely, when the user moves the first adjusting screw 5 away from the endoscope assembly 2, the first adjusting screw 5 moves out of the main body 1, thereby restoring the elastic element 61 on the first fixing screw 6, and the endoscope assembly 2 moves in the direction in which the elastic element 61 has been restored. By adjusting the first adjusting screw 5 in different directions, the position of the endoscope assembly 2 can be moved, thereby achieving coaxiality with the objective lens.

[0036] Preferred, such as Figure 4As shown, the first fixing screw 6 and the first adjusting screw 5 are symmetrically arranged on both sides of the main body 1 along its circumference. For example, when the cross-section of the main body 1 corresponding to the periphery of the endoscope assembly 2 is rectangular, the first fixing screw 6 and the first adjusting screw 5 are symmetrically arranged on both sides of the main body 1, and can also be symmetrically arranged at the four corners. With this arrangement, the first fixing screw 6 and the first adjusting screw 5 are located on the same side. The force on both sides of the endoscope assembly 2 is more even, and adjustment can be made on only the side where the first adjusting screw 5 is located to achieve adjustment of the endoscope assembly 2 in multiple directions, making adjustment more convenient.

[0037] In one implementation, such as Figure 3 As shown, the endoscope assembly 2 includes an endoscope 21 and a sleeve 22. The endoscope 21 is disposed within the sleeve 22, and both the first fixing screw 6 and the first adjusting screw 5 abut against the sleeve 22. The sleeve 22 prevents the first fixing screw 6 from directly abutting against the endoscope 21, thus avoiding damage to the endoscope 21. Furthermore, multiple abutment surfaces 221 are provided circumferentially on the side wall of the sleeve 22. The first fixing screw 6 and the first adjusting screw 5 abut against the abutment surfaces 221. Compared to a curved surface, the abutment surfaces 221 ensure that the first fixing screw 6 and the first adjusting screw 5 can stably clamp the endoscope assembly 2, preventing axial movement of the endoscope assembly 2.

[0038] After the tube lens assembly 2 and the objective lens are coaxially aligned, light enters the interior of the main body 1 along the objective lens and tube lens 21, and is then reflected by the mirror assembly 3 onto the camera assembly 4. To achieve coaxiality of the optical path, it is also necessary to ensure that the light reflected by the mirror assembly 3 is coaxial with the camera assembly 4. Therefore, in one embodiment, as... Figure 2 and Figure 3 As shown, the reflector assembly 3 includes a reflector 31 and a mounting base 32. The mounting base 32 is movably connected to the side wall of the main body 1 to adjust the angle of the reflector 31. For example, when the main body 1 is L-shaped, the mounting base 32 is located at the bend of the L-shaped main body 1.

[0039] Specifically, the mounting base 32 is movably connected to the main body 1 via multiple second fixing screws 8 and multiple second adjusting screws 7. The second fixing screws 8 pass through the mounting base 32 and are fixedly connected to the main body 1, while the second adjusting screws 7 pass through the mounting base 32 and are movable relative to the mounting base 32.

[0040] A second elastic element 81 is fitted onto the second fixing screw 8. One end of the second elastic element 81 abuts against the mounting base 32, and the other end is connected to the second fixing screw 8. The elastic force of the second elastic element 81 causes the mounting base 32 to abut against the main body 1, thereby pressing the mounting base 32 onto the main body 1 through the elastic force of the second fixing screw 8. The end of the second adjusting screw 7 abuts against the main body 1. Understandably, the second adjusting screw 7 is also provided with a self-locking structure, so that its position can be locked after the second adjusting screw 7 moves.

[0041] The second fixing screw 8 and the second adjusting screw 7 adjust the mounting base 32 as follows: In the initial state, the elastic force of the second elastic element 81 on the second fixing screw 8 presses the mounting base 32 onto the main body 1. When it is necessary to adjust the base of the mounting base 32, the user moves the second adjusting screw 7, and the mounting base 32 moves closer to or further away from the main body 1 along the second adjusting screw 7. When the mounting base 32 moves away from the main body 1, the second elastic element 81 is compressed. When the mounting base 32 moves closer to the main body 1, the second elastic element 81 recovers its elasticity. By adjusting the second adjusting screw 7 at different positions, the angle of the mounting base 32 in different directions can be adjusted, so that the reflector 31 moves together with the mounting base 32, causing the angle of the reflected light to change, achieving coaxiality with the camera assembly 4. During this process, even if the second elastic element 81 recovers its elasticity, it is still in a compressed state, so that the position of the mounting base 32 can remain unchanged after adjustment.

[0042] Preferred, such as Figure 2 As shown, multiple second fixing screws 8 and multiple second adjusting screws 7 are arranged sequentially and spaced apart along the circumference of the mounting base 32. Unlike the adjustment of the tube lens assembly 2, the reflector assembly 3 needs to be adjusted in multiple directions. Therefore, the second fixing screws 8 and the second adjusting screws 7 are arranged spaced apart along the circumference of the mounting base 32, so that the mounting base 32 can have more adjustment positions and more adjustment angles to ensure that the reflected light can be coaxial with the camera assembly 4.

[0043] In one embodiment, the camera assembly 4 includes a camera sleeve 41 and a camera 42. One end of the camera sleeve 41 is connected to the main body 1 and located in the optical path. The camera 42 is disposed at the other end of the camera sleeve 41 and is used to observe the object at the objective lens. A lens group 43 is disposed inside the camera sleeve 41. The lens group 43 processes the light so that a clear image can be formed on the target surface of the camera 42.

[0044] In summary, this coaxial microscope structure, by incorporating a movable tube lens assembly 2 and using the first adjusting screw 5 and the first fixing screw 6 to fix and adjust the tube lens 21, makes it easier to achieve coaxial alignment between the tube lens 21 and the objective lens. The reflecting mirror assembly 3 can also be moved, and the angle of the reflecting mirror 31 can be adjusted by adjusting the second adjusting screw 7 and the second fixing screw 8, achieving accurate adjustment of the reflected light angle and ensuring the coaxiality of the light path in the microscope where the objective lens and tube lens 21 are separate. With this configuration, the coaxiality of the objective lens, tube lens 21, and camera 42 no longer relies on machining precision, reducing machining costs. Furthermore, different microscopes can use the same tooling for debugging, reducing differences between equipment and avoiding the impact of batch-to-batch variations in machined parts. In addition, the coaxial structure of this microscope is simpler to adjust, thus reducing the skill requirements for technicians.

[0045] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A microscope coaxial structure, characterized by, include: The main body has an internal cavity through which light can pass; A telescope assembly is disposed within the cavity of the main body, and the telescope assembly is horizontally movable relative to the main body, allowing light to enter the cavity from the telescope assembly. A reflector assembly, movably disposed on the main body along the optical path and capable of reflecting light entering from the tube mirror assembly; and A camera assembly is positioned on one side of the main body along the optical path to receive light reflected by the mirror assembly.

2. The microscope coaxial structure according to claim 1, characterized in that, The main body is provided with a plurality of first fixing screws and first adjusting screws in the circumferential direction. The first fixing screws and first adjusting screws abut against the endoscope assembly to fix and adjust the endoscope assembly.

3. The microscope coaxial structure according to claim 2, characterized in that The plurality of first fixing screws are fixedly disposed on the main body. A first elastic element is disposed between each first fixing screw and the endoscope assembly. One end of the first elastic element abuts against the side wall of the endoscope assembly, and the other end is fixed to the first fixing screw. The first elastic element is always in a compressed state. One end of the first adjusting set screw abuts against the endoscope assembly, and the first adjusting set screw can move closer to or further away from the endoscope assembly to move the endoscope assembly; each first adjusting set screw is provided with a self-locking structure.

4. The microscope coaxial structure according to claim 3, characterized in that, The first fixed set screw and the first adjusting set screw are symmetrically arranged on both sides of the main body along the circumference of the main body.

5. The microscope coaxial structure according to claim 1, characterized in that, The reflector assembly includes: Mirror; and The mounting base is movably connected to the side wall of the main body to adjust the angle of the reflector.

6. The microscope coaxial structure according to claim 5, characterized in that The mounting base is movably connected to the main body via multiple second fixing screws and multiple second adjusting screws. The second fixing screws pass through the mounting base and are fixed relative to the main body, while the second adjusting screws pass through the mounting base and are movable relative to the mounting base.

7. The microscope coaxial structure according to claim 6, characterized in that The second fixing screw is provided with a second elastic element. One end of the second elastic element abuts against the mounting base, and the other end is connected to the second fixing screw. The elastic force of the second elastic element causes the mounting base to abut against the main body. The end of the second adjusting set screw abuts against the main body, and each second adjusting set screw is provided with a self-locking structure.

8. The microscope coaxial structure according to claim 6, characterized in that The plurality of second fixed set screws and the plurality of second adjusting set screws are arranged sequentially at intervals along the circumference of the mounting base.

9. The microscope coaxial structure according to claim 2, characterized in that, The endoscope assembly includes: Endoscope; and A sleeve, wherein the endoscope is disposed inside the sleeve and the first fixing screw and the first adjusting screw abut against the sleeve; The sleeve has multiple abutment planes arranged circumferentially on its side wall, and the first fixing screw and the first adjusting screw abut against the abutment planes.

10. The microscope coaxial structure of claim 2, wherein, The camera assembly includes: A camera sleeve, one end of which is connected to the main body and located in the optical path; and The camera is located at the other end of the camera sleeve; The camera sleeve contains a lens assembly.

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