Optical experiment table for high-temperature structural design of optical objective lens group of endoscope

Abstract

The invention provides an optical experiment table for high-temperature structural design of an optical objective lens group of an endoscope. The optical experiment table comprises a long sliding rail; the direction adjusting assembly is arranged on the long sliding rail and can move in the first direction, the second direction and the third direction relative to the long sliding rail, and the first direction, the second direction and the third direction are perpendicular to one another; and the lens module group is arranged on the direction adjusting assembly and can move along with the direction adjusting assembly. An initial endoscope group structure is designed through early-stage thermal environment numerical simulation and optical software, and the experiment table is used for testing, so that an optimal high-temperature endoscope group structure can be quickly obtained, and a large amount of early-stage design and test time is saved.

Description

Technical Field

[0001] The invention relates to the technical field of optical experimental equipment, and in particular to an optical experimental table used for high-temperature structural design of an optical objective lens group of an endoscope. Background Art

[0002] As a key device in the field of aviation engines, high-temperature endoscopes can detect the strain of hot-end components of engines in high-temperature environments. Its working principle is that a high-speed camera uses the optical lens group in the high-temperature endoscope to take pictures of the hot-end components of the engine in operation, and obtains key data such as its strain through algorithms. However, the lens group will undergo certain deformations due to thermal expansion and contraction, thermal stress, etc. at high temperatures, causing changes in the key parameters of the lens group, which will seriously affect the quality of the camera photos and the credibility of the strain data. In order to solve the detection error problem caused by the deformation of the lens group at high temperatures, a lot of preliminary design and testing are required. Therefore, it is imperative to build an optical test bench and design method for the high-temperature design of the endoscope lens group.

[0003] CN 111514955 A discloses an optical adjustment platform for quantum optical experiments. The lens can be rotated around the axis by adjusting the rod seat, which increases the dimension of the test platform to adjust the direction. At the same time, the rotatable legs make the platform foldable, which greatly improves the portability of the platform. Although the invention increases the adjustment dimension of the lens rotation around the axis, the dimension of its translation adjustment is not increased. It can only be translated in one direction, and the adjustment range of the optical experiment is limited. The test platform is only suitable for optical experiments at room temperature and does not involve the problem of optical experiments at high temperatures. . Summary of the invention

[0004] In view of this, the present invention provides an optical experimental platform for high-temperature structural design of an endoscope optical objective lens group, so as to achieve adjustment of a single lens in multiple dimensional directions.

[0005] The present invention provides the following technical solution: an optical experimental table for high-temperature structural design of an endoscope optical objective lens group, comprising: a long slide rail; a direction adjustment component, which is arranged on the long slide rail, and the direction adjustment component can move along a first direction, a second direction and a third direction relative to the long slide rail, and the first direction, the second direction and the third direction are perpendicular to each other; a lens module group, which is arranged on the direction adjustment component and can move with the direction adjustment component.

[0006] Furthermore, the direction adjustment component includes a plurality of direction adjustment units having the same structure and being independent of each other.

[0007] Furthermore, the direction adjustment unit includes: a first direction adjustment component, which is arranged on the long slide rail and can move along the first direction relative to the long slide rail; a second direction adjustment component, which is arranged on the first direction adjustment component and can move along the second direction relative to the first direction adjustment component; a third direction adjustment component, which is arranged on the second direction adjustment component and can move along the third direction relative to the second direction adjustment component, and the corresponding lens in the lens module group can be arranged on the third direction adjustment component.

[0008] Furthermore, the first direction adjustment component includes: a first direction slide, which is arranged on the long slide rail; a first direction adjustment knob, which is arranged on the first direction slide and meshes with the rack on the long slide rail, and the first direction adjustment knob can drive the first direction slide to move along the first direction relative to the long slide rail; a first direction stop knob, which is arranged on the first direction slide and can abut against the long slide rail.

[0009] Furthermore, the second direction adjustment component includes: a second direction slide, which is arranged on the first direction adjustment component; a second direction adjustment knob, which is arranged on the second direction slide and engages with the rack on the first direction adjustment component, and the second direction adjustment knob can drive the second direction slide to move along the second direction relative to the first direction adjustment component.

[0010] Furthermore, the third direction adjustment component includes: a support assembly, which is arranged on the second direction adjustment component, and the support assembly has an inner cavity; a workbench, which is arranged at the upper end of the support assembly, and the corresponding lens in the lens module group is arranged on the workbench; a rotating control block, which is hingedly arranged in the inner cavity, and the movable end of the rotating control block can abut against the workbench; a third direction adjustment knob, which is arranged on the support assembly and abuts against the rotating control block, and the third direction adjustment knob can drive the rotating control block to rotate and drive the workbench to be propped up or dropped along the third direction.

[0011] The third direction adjustment component also includes: a stop plate, which is provided with spaced fixing holes and long holes, and the fixing screws pass through the fixing holes and fix one end of the stop plate to the workbench; a third direction stop knob, which is arranged on the support assembly and connected to the long hole, and the third direction stop knob can press the other end of the stop plate against the support assembly.

[0012] Furthermore, the optical experimental platform for high-temperature structural design of the endoscope optical objective lens group also includes a heating module, which is arranged on the third direction adjustment component, and the lens module group is arranged in the heating module.

[0013] Furthermore, the optical experimental bench used for high-temperature structural design of the endoscope optical objective lens group also includes: an optical fiber bundle connected to the heating module through a fixed flange; and a high-speed camera connected to the optical fiber bundle and capable of photographing the lens module group.

[0014] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted by the present invention include at least:

[0015] 1. The initial endoscope lens group structure is designed through the preliminary thermal environment numerical simulation and optical software, and the test bench is used for testing, which can quickly obtain the optimal high-temperature endoscope lens group structure and save a lot of time for preliminary design and testing.

[0016] 2. Through the interconnection of the first direction adjustment mechanism, the second direction adjustment mechanism and the third direction adjustment mechanism, the lens and the standard sample can be independently adjusted in multiple dimensions. At the same time, in conjunction with the heating module, the device has the function of independent multi-dimensional direction adjustment of multiple modules in a high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural axonometric diagram of the present invention.

[0019] Figure 2 It is a cross-sectional view of the present invention.

[0020] Figure 3 This is a view of the third direction adjustment mechanism of the present invention.

[0021] Figure 4 for Figure 3 Horizontal cross-sectional view.

[0022] Figure 5 for Figure 3 Longitudinal section view of .

[0023] The reference numerals in the figure are: 1. long slide; 2. first direction slide; 3. first direction adjustment knob; 4. first direction stop knob; 5. second direction slide; 6. third direction adjustment knob; 7. boss; 8. rotation control block; 9. optical axis; 10. front support; 11. rear support; 12. cylindrical roller slide; 13. base; 14. workbench; 15. stop plate; 16. gasket; 17. third direction stop knob; 18. sapphire transparent light window; 19. heating module; 20. fixed flange; 21. optical fiber bundle; 22. high-speed camera; 23. standard template; 24. first lens; 25. second lens; 26. third lens; 27. fourth lens; 28 lens support; 29 ball bearing; 30 second direction adjustment knob. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0026] like Figures 1 to 5 As shown, an embodiment of the present invention provides an optical experimental table for high-temperature structural design of an endoscope optical objective lens group, comprising a long slide rail 1, a direction adjustment component and a lens module group; the direction adjustment component is arranged on the long slide rail 1, and the direction adjustment component can move relative to the long slide rail 1 along a first direction, a second direction and a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the lens module group is arranged on the direction adjustment component and can move with the direction adjustment component.

[0027] The present invention adopts a high-dimensional, multi-module lens group adjustment design to achieve adjustment of a single lens in multiple dimensional directions.

[0028] Preferably, the direction adjustment assembly includes a plurality of direction adjustment units having the same structure and being independent of each other. Each direction adjustment unit includes:

[0029] A first direction adjustment component, which is disposed on the long slide rail 1 and can move along a first direction relative to the long slide rail 1;

[0030] A second direction adjusting component, disposed on the first direction adjusting component and capable of moving along a second direction relative to the first direction adjusting component;

[0031] The third direction adjustment component is arranged on the second direction adjustment component and can move along the third direction relative to the second direction adjustment component, and the corresponding lens or standard template module in the lens module group can be arranged on the third direction adjustment component.

[0032] The direction adjustment component realizes accurate three-dimensional spatial positioning of the lens or standard sample module in the lens module group through its unique multi-level structural design. Each direction adjustment unit operates independently, so that the lens or standard sample module can be accurately moved and positioned along three orthogonal directions (first direction, second direction, and third direction). This design provides a high degree of flexibility and adjustment accuracy, allowing the optical system to adapt to different experimental conditions and requirements. By moving the first direction adjustment component along the long slide rail 1, the translation of the lens or standard sample module in the first direction can be achieved; the movement of the second direction adjustment component relative to the first direction adjustment component allows adjustment in the second direction; and the third direction adjustment component provides fine-tuning capabilities in the third direction. Overall, this design enables the optical laboratory bench to respond quickly to different experimental settings, improves the efficiency and accuracy of the experiment, and also enhances the adaptability and versatility of the optical system.

[0033] It should be noted that the first direction is the X direction, the second direction is the Y direction, and the third direction is the Z direction.

[0034] Specifically, the first direction adjustment component includes:

[0035] The first direction slide 2 is arranged on the long slide rail 1;

[0036] A first direction adjustment knob 3 is disposed on the first direction slide 2 and meshes with the rack on the long slide rail 1. The first direction adjustment knob 3 can drive the first direction slide 2 to move relative to the long slide rail 1 along the first direction;

[0037] The first direction stop knob 4 is disposed on the first direction slide table 2 and can abut against the long slide rail 1 .

[0038] By meshing the first direction adjustment knob 3 with the rack on the long slide rail 1, the first direction slide 2 can be accurately driven to move along the set first direction to achieve micron-level positioning accuracy. This design not only improves the flexibility and accuracy of adjustment, but also allows fine positioning of optical components, which is crucial for optical experiments and equipment that require high-precision alignment.

[0039] The setting of the first direction stop knob 4 further enhances the stability and safety of the system. When the first direction slide 2 moves to the desired position, the first direction stop knob 4 abuts against the long slide rail 1 to firmly lock the position of the first direction slide 2, preventing displacement caused by external vibration or accidental touch, and ensuring the precise alignment and stability of the optical elements. This design not only improves the convenience of operation, but also ensures the reliability and repeatability of the experiment process, which is an important technological advancement for high-precision optical experiments and equipment.

[0040] In the embodiment of the present invention, the first direction slide table 2 is connected with the long slide rail 1 through a dovetail groove, and the extension direction of the long slide rail 1 is parallel to the first direction. The first direction slide table 2 is provided with a second direction slide rail.

[0041] The second direction adjustment component in the embodiment of the present invention includes:

[0042] The second direction slide 5 is arranged on the first direction adjustment component;

[0043] The second direction adjusting knob 30 is disposed on the second direction slide 5 and meshes with the rack on the first direction adjusting component. The second direction adjusting knob 30 can drive the second direction slide 5 to move along the second direction relative to the first direction adjusting component.

[0044] The above scheme realizes accurate two-dimensional adjustment on the first direction adjustment component. The second direction slide 5 allows the optical element to move independently in the second direction, and the second direction adjustment knob 30 is engaged with the rack on the first direction adjustment component, providing an accurate power transmission mechanism, so that the second direction slide 5 can move accurately along the second direction.

[0045] This design not only enhances the adjustment flexibility of the system, but also allows the position of the optical element to be further fine-tuned based on the positioning by the first direction adjustment component to achieve a more precise alignment. By operating the second direction adjustment knob 30, translation in a plane perpendicular to the first direction can be achieved.

[0046] Further, the third direction adjustment component includes:

[0047] A support assembly is arranged on the second direction adjustment component, and the support assembly has an inner cavity;

[0048] A workbench 14 is arranged at the upper end of the support assembly, and corresponding lenses in the lens module group are arranged on the workbench 14;

[0049] A rotating control block 8 is hingedly disposed in the inner cavity, and a movable end of the rotating control block 8 can abut against the workbench 14;

[0050] The third direction adjustment knob 6 is arranged on the supporting assembly and abuts against the rotation control block 8. The third direction adjustment knob 6 can drive the rotation control block 8 to rotate and drive the workbench 14 to be propped up or dropped along the third direction.

[0051] The movable end of the rotating control block 8 is in contact with the workbench 14, so that when the third direction adjustment knob 6 is extended or retracted, the rotating control block 8 can rotate, thereby driving the workbench 14 and the lens thereon to rise or fall along the third direction. This design not only provides fine-tuning capability in the vertical direction, but also can achieve precise positioning of the lens in the vertical direction through the drive of the third direction adjustment knob 6.

[0052] It should be noted that a ball 29 is provided at the contact position between the lower end of the workbench 14 and the rotation control block 8 .

[0053] The present invention can realize accurate alignment and adjustment in three-dimensional space, and improves the flexibility and precision of optical experiments. Through the operation of the third directional adjustment component, the lens can be quickly positioned and the height adjusted, which is particularly important for optical systems that require fine adjustment of focal length and alignment. In addition, this design also enhances the stability of the system because it can firmly fix the lens, reduce displacement caused by external factors such as vibration or impact, and ensure the repeatability and reliability of optical experiments.

[0054] Preferably, the third direction adjustment component further includes:

[0055] The stopper 15 is provided with fixing holes and long holes distributed at intervals, and the fixing screws pass through the fixing holes and fix one end of the stopper 15 to the workbench 14;

[0056] The third direction stop knob 17 is disposed on the support assembly and is connected with the long hole. The third direction stop knob 17 can press the other end of the stop sheet 15 onto the support assembly.

[0057] By operating the third directional stop knob 17, the workbench 14 can be locked in axial displacement by the stopper 15, ensuring that the lens module is fixed firmly and adjustable in the vertical direction. This precise fixing and fine-tuning capability is essential to maintain the precise alignment of optical components, especially in the design of high-temperature endoscope optical objective lens groups that require stable imaging for a long time. In addition, this design also helps to reduce displacement caused by external vibration or temperature changes, thereby improving the repeatability of the experiment and the accuracy of the results.

[0058] It should be noted that a washer 16 is provided between the third direction stop knob 17 and the stop plate 15 .

[0059] The supporting assembly includes: a boss 7, an optical axis 9, a front platform 10, a rear platform 11 and a base 13. The third direction adjustment knob 6 passes through the boss 7 and is threadedly connected to the boss 7, the boss 7 is connected to the front platform 10 by a fixing screw, the optical axis 9 passes through the front platform 10 and is hinged to the rotation control block 8, the front platform 10 is connected to the base 13 by a fixing screw, and the rear platform 11 is connected to the front platform 10 by a fixing screw.

[0060] The embodiment of the present invention further comprises a cylindrical roller guide rail 12 connected to the rear platform 11 via fixing screws, and the workbench 14 is connected to the cylindrical roller guide rail 12 via fixing screws and abuts against the rotation control block 8 .

[0061] The optical experiment table for high temperature structure design of endoscope optical objective lens group of the present invention also includes a heating module 19, which is arranged on the third direction adjustment component, and the lens module group is arranged in the heating module 19. A sapphire transparent light window 18 is installed on one side of the heating module 19, and a shooting through hole is provided on the other side.

[0062] The optical experimental platform for high temperature structure design of endoscope optical objective lens group of the present invention also includes:

[0063] The optical fiber bundle 21 is connected to the shooting through hole of the heating module 19 through the fixing flange 20;

[0064] The high-speed camera 22 is connected to the optical fiber bundle 21 and can photograph the lens module group.

[0065] The lens module group in the embodiment of the present invention includes a first lens 24, a second lens 25, a third lens 26 and a fourth lens 27 arranged in sequence, each lens is fixed to the workbench 14 of the corresponding direction adjustment unit through a lens support 28 to achieve independent adjustment. The standard template 23 is fixedly connected to the workbench 14 of the corresponding direction adjustment unit through a fixing screw.

[0066] A specific implementation is provided below for illustration:

[0067] First, an Ansys thermal simulation analysis is performed on the endoscope lens group with clear imaging at room temperature. The thermal deformation parameters, curvature change parameters and other important parameters affecting imaging of each lens in the endoscope lens group are analyzed. The analyzed parameters are imported into the optical software, and the initial lens group is reversely designed. For example, the simulation analysis shows that the diameter deformation of the lens in a thermal environment is +0.03mm. In this way, the lens diameter is reduced by 0.03mm in the optical software to achieve the theoretical effect of clear high-temperature imaging. After the optimized endoscope lens group is processed, the device is used for testing. First, fix the lens on the lens support 28 through the card slot, use the second direction adjustment mechanism and the third direction adjustment mechanism to ensure that each lens and the standard sample 23 remain on the same axis, add the heating module 19, and connect the fixed flange 20 to the heating module 19 through the fixing screws, and connect the optical fiber bundle 21 to the fixed flange 20. After the use environment of the lens is heated to the specified temperature, the high-speed camera 22 shoots the standard sample through the optical fiber bundle 21, the high-temperature endoscope lens group and the sapphire transparent light window 18, and the first direction adjustment knob 3 is rotated to adjust the focal length between the lenses and the focal length between the standard sample 23 and the heating module 19 until the picture is clear.

[0068] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An optical experimental platform for high temperature structure design of endoscope optical objective lens group, characterized in that: include: Long slide rail (1); A direction adjustment component is arranged on the long slide rail (1), and the direction adjustment component can move relative to the long slide rail (1) along a first direction, a second direction and a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The lens module group is arranged on the direction adjustment component and can move together with the direction adjustment component.

2. The optical experimental platform for high temperature structure design of endoscope optical objective lens assembly according to claim 1, characterized in that: The direction adjustment component includes a plurality of direction adjustment units which have the same structure and are independent of each other.

3. The optical experimental platform for high temperature structure design of endoscope optical objective lens assembly according to claim 2, characterized in that: The direction adjustment unit includes: A first direction adjustment component, which is arranged on the long slide rail (1) and is capable of moving along a first direction relative to the long slide rail (1); A second direction adjusting component, disposed on the first direction adjusting component and capable of moving along a second direction relative to the first direction adjusting component; The third direction adjusting component is arranged on the second direction adjusting component and can move along the third direction relative to the second direction adjusting component, and the corresponding lens in the lens module group can be arranged on the third direction adjusting component.

4. The optical experimental platform for high temperature structure design of endoscope optical objective lens assembly according to claim 3, characterized in that: The first direction adjustment component comprises: A first direction slide table (2) is arranged on the long slide rail (1); A first direction adjustment knob (3) is arranged on the first direction slide table (2) and meshes with the rack on the long slide rail (1), and the first direction adjustment knob (3) can drive the first direction slide table (2) to move relative to the long slide rail (1) along a first direction; The first direction stop knob (4) is arranged on the first direction slide platform (2) and can abut against the long slide rail (1).

5. The optical experimental platform for high temperature structure design of endoscope optical objective lens assembly according to claim 3, characterized in that: The second direction adjustment component comprises: A second direction slide table (5) is arranged on the first direction adjustment component; The second direction adjustment knob (30) is arranged on the second direction slide table (5) and meshes with the rack on the first direction adjustment component. The second direction adjustment knob (30) can drive the second direction slide table (5) to move along the second direction relative to the first direction adjustment component.

6. The optical experimental platform for high temperature structure design of endoscope optical objective lens assembly according to claim 3, characterized in that: The third direction adjustment component includes: A support assembly is arranged on the second direction adjustment component, and the support assembly has an inner cavity; A workbench (14) is arranged at the upper end of the support assembly, and corresponding lenses in the lens module group are arranged on the workbench (14); A rotating control block (8) is hingedly arranged in the inner cavity, and a movable end of the rotating control block (8) can abut against a workbench (14); The third direction adjustment knob (6) is arranged on the support assembly and abuts against the rotation control block (8). The third direction adjustment knob (6) can drive the rotation control block (8) to rotate and drive the workbench (14) to be lifted or lowered along the third direction.

7. The optical experimental platform for high temperature structure design of endoscope optical objective lens assembly according to claim 6, characterized in that: The third direction adjustment component also includes: The stopper (15) is provided with fixing holes and long holes which are spaced apart from each other, and the fixing screws pass through the fixing holes and fix one end of the stopper (15) to the workbench (14); A third direction stop knob (17) is arranged on the support assembly and is connected in cooperation with the long hole. The third direction stop knob (17) can press the other end of the stop sheet (15) onto the support assembly.

8. The optical experimental platform for high temperature structure design of endoscope optical objective lens assembly according to any one of claims 1 to 7, characterized in that: The optical experimental platform for high-temperature structural design of an endoscope optical objective lens group also includes a heating module (19) arranged on a third direction adjustment component, and the lens module group is arranged in the heating module (19).

9. The optical experimental platform for high temperature structure design of endoscope optical objective lens assembly according to claim 8, characterized in that: The optical experimental platform for high temperature structure design of endoscope optical objective lens group also includes: The optical fiber bundle (21) is connected to the heating module (19) via a fixing flange (20); A high-speed camera (22) is connected to the optical fiber bundle (21) and is capable of photographing the lens module group.

Images