Deep hole detection equipment for mechanical part

Abstract

The utility model discloses deep hole detection equipment for a mechanical part. The deep hole detection equipment comprises a camera, a field angle lens and a linear polarization laser. The field angle lens comprises a lens barrel and a polarized light cube optical splitter, the lens barrel comprises a first part, a second part and a third part which are connected in sequence, and the first part, the second part and the third part are communicated. The first part is provided with a light inlet, the third part is connected with the camera, the polarized light cubic optical splitter is arranged in the second part, and the second part is provided with a laser incidence hole. Linear polarization laser emitted by the linear polarization laser enters the lens barrel through the laser incidence hole, then is emitted out through the polarized light cube optical splitter and the light inlet, is reflected by the deep hole of the mechanical part, and then enters the camera through the light inlet and the polarized light cube optical splitter in sequence, so that shooting of the deep hole is achieved. According to the utility model, through the cooperation of the optical components, the purposes of simplifying the deep hole detection process and improving the deep hole detection efficiency are achieved.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to a deep hole testing device for mechanical components. Background Technology

[0002] In the manufacturing and quality control of mechanical components, the inspection of deep holes (hereinafter referred to as "deep holes") is a crucial step. Deep hole inspection typically involves measuring the hole's diameter and observing its internal structure and wall details, such as wall roughness. Traditional inspection methods often require complex equipment and lengthy inspection times. Therefore, developing a deep hole inspection device that simplifies the inspection process and improves efficiency is of significant practical importance. Utility Model Content

[0003] This invention provides a deep hole inspection device for mechanical components. By using a camera, a field-of-view lens, and a linearly polarized laser in combination, it is possible to quickly and accurately detect the internal structural features of deep holes, thereby simplifying the inspection process and improving inspection efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A deep hole inspection device for mechanical components, characterized in that it includes a camera, a field-of-view lens, and a linearly polarized laser, wherein the field-of-view lens includes a lens barrel and a polarizing cube beam splitter, and the lens barrel includes a first part, a second part, and a third part connected in sequence, wherein the first part, the second part, and the third part are interconnected.

[0006] The polarizing cube beam splitter includes a first right-angle prism and a second right-angle prism, with the inclined surfaces of the first right-angle prism and the second right-angle prism arranged opposite each other. The inclined surface of the first right-angle prism faces away from the laser entrance aperture, and the inclined surface of the second right-angle prism faces away from the camera.

[0007] The inclined surface of the first right-angle prism is coated with a dielectric polarizing beam-splitting film;

[0008] The first part is provided with a light inlet, the third part is connected to the camera, the polarizing cube beam splitter is located inside the second part, the second part is provided with a laser entrance aperture, and the linearly polarized laser is located at the laser entrance aperture, so that the linearly polarized laser emitted by the linearly polarized laser enters the lens barrel through the laser entrance aperture, and then exits through the polarizing cube beam splitter and the light inlet. After being reflected by the deep hole of the mechanical component, it sequentially passes through the light inlet, the polarizing cube beam splitter, and enters the camera to achieve the imaging of the deep hole.

[0009] Furthermore, the field-of-view lens also includes an aperture stop, which is located inside the third part.

[0010] Furthermore, the field-of-view lens also includes an aperture adjustment knob, which is connected to the aperture. The aperture adjustment knob is located outside the third part and is used to adjust the light-transmitting aperture of the aperture.

[0011] Furthermore, the second part is provided with a connecting component, the connecting component having a connection port that communicates with the laser incident hole, and the connecting component being connected to the linearly polarized laser.

[0012] Furthermore, the linearly polarized laser includes a rotating linear polarizer and a laser generator, with the rotating linear polarizer positioned in the light-emitting direction of the laser generator; the deep hole detection device also includes a rotation adjustment angle component connected to the rotating linear polarizer, which is used to adjust the polarization direction of the linearly polarized laser.

[0013] Furthermore, the field-of-view lens also includes a first lens group, a second lens group, and a third lens group disposed within the lens barrel. The first lens group is disposed between the light inlet and the polarizing cube beam splitter, the second lens group is disposed between the polarizing cube beam splitter and the aperture stop, and the third lens group is disposed between the aperture stop and the camera.

[0014] Furthermore, the deep hole detection device also includes a motor module connected to the camera, which drives the camera to move so that the field-of-view lens moves closer to or further away from the deep hole.

[0015] Furthermore, the motor module includes a drive component and a sliding device, the camera is mounted on the sliding device, and the drive component is used to drive the sliding device to move the camera.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a deep hole detection device for mechanical components, including a camera, a field-of-view lens, and a linearly polarized laser. The linearly polarized laser emitted by the linearly polarized laser enters the lens barrel of the field-of-view lens through the laser entrance aperture, and then exits through the polarizing cube beam splitter and the light inlet of the field-of-view lens. After being reflected by the deep hole of the mechanical component, it enters the camera to realize the imaging of the deep hole of the mechanical component. The entire detection process includes the linearly polarized laser emitted by the linearly polarized laser, the transmission of the linearly polarized laser by the field-of-view lens, and the imaging by the camera. It does not require complicated operations, the detection process is simple, and the detection efficiency is high.

[0017] Furthermore, linearly polarized lasers offer advantages such as more concentrated beams and higher energy efficiency, which helps illuminate the interior of deep holes. The polarizing cube beam splitter in the field-of-view lens effectively reduces reflected linearly polarized laser light from non-target directions, enhancing the detail contrast of the deep hole surface, especially for areas with different refractive indices or surface roughness. Capturing polarized images of the deep hole with a camera helps inspectors observe the details of the hole walls more clearly, and simultaneously measures the hole diameter using these images. The combined effect of these various optical components significantly improves the clarity of the polarized images of the deep hole, thereby enhancing inspection accuracy.

[0018] By adding an aperture stop and an aperture stop adjustment knob to the field-of-view lens, the size of the aperture stop can be adjusted to control the brightness and depth of field of the acquired deep hole polarization image, enabling inspectors to obtain the best deep hole imaging effect inside the deep hole being tested.

[0019] By configuring the motor module, when the depth of the deep hole exceeds the depth of field of the field-of-view lens, the motor module can be controlled in small steps to scan progressively, achieving segmented focusing of the deep hole. This can be applied to deep holes of different diameters and depths, avoiding the problem of detection blind spots and exhibiting high versatility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0021] Figure 2 This is a vertical three-dimensional sectional view of the structure of this utility model;

[0022] Figure 3 This is a vertical planar sectional view and a schematic diagram of the deep hole of this utility model;

[0023] Figure 4 This is a top view of the structure of this utility model;

[0024] The reference numerals in the attached figures are explained as follows: 10-Camera; 11-Camera target surface; 12-Camera power interface; 13-Camera data transmission interface; 14-C-Mount interface; 20-Field of view lens; 21-First part; 211-First lens group; 22-Second part; 221-Second lens group; 23-Third part; 231-Third lens group; 24-Light inlet; 25-Polarizing cube beam splitter; 251-First right-angle prism; 252-Second right-angle prism; 26-Lens barrel; 27-Laser entrance aperture; 28-Aperture; 281-Aperture adjustment knob; 29-Connecting component; 30-Linearly polarized laser; 31-Rotating linear polarizer; 32-Laser generator; 33-Rotation adjustment angle component; 40-Motor module; 41-Driver; 42-Sliding device; 50-Deep hole. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "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 utility model 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 utility model.

[0027] Furthermore, the terms "first," "second," etc., in the specification, claims, or accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. The terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In embodiments of this utility model, unless otherwise expressly specified and limited, the terms "connected," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] Deep hole inspection is a crucial step in the manufacturing and quality control of mechanical components. Deep hole inspection typically involves measuring the diameter of the deep hole and observing its internal structure and wall details, such as wall roughness. Traditional inspection methods often employ contact measurements or radiographic testing, requiring complex equipment and lengthy inspection times. Therefore, developing a deep hole inspection device that simplifies the inspection process and improves efficiency is of significant practical importance.

[0030] To solve the above problems, this utility model provides an appendix. Figures 1-4 This utility model provides a deep hole inspection device for mechanical components, including: a camera 10, a field-of-view lens 20, and a linearly polarized laser 30. The field-of-view lens 20 includes a lens barrel 26 and a polarizing cube beam splitter 25. The lens barrel 26 includes a first part 21, a second part 22, and a third part 23 connected in sequence. The first part 21, the second part 22, and the third part 23 are connected.

[0031] The polarizing cube beam splitter 25 includes a first right-angle prism 251 and a second right-angle prism 252. The inclined surfaces of the first right-angle prism 251 and the second right-angle prism 252 are arranged opposite each other. The inclined surface of the first right-angle prism 251 faces away from the laser entrance aperture 27, and the inclined surface of the second right-angle prism 252 faces away from the camera 10.

[0032] The inclined surface of the first right-angle prism 251 is coated with a dielectric polarizing beam splitter film.

[0033] The first part 21 is provided with a light inlet 24, and the third part 23 is connected to the camera 10. The polarizing cube beam splitter 25 is located inside the second part 22, and the second part 22 is provided with a laser entrance aperture 27. The linearly polarized laser 30 is located at the laser entrance aperture 27, so that the linearly polarized laser emitted by the linearly polarized laser 30 enters the lens barrel 26 through the laser entrance aperture 27, and then exits through the polarizing cube beam splitter 25 and the light inlet 24. After being reflected by the deep hole of the mechanical component, it sequentially passes through the light inlet 24, the polarizing cube beam splitter 25, and enters the camera 10 to achieve the imaging of the deep hole.

[0034] It should be noted that in this embodiment, the deep hole size range can be a hole with a diameter of 0.8 mm to 5 mm and a depth of 0.4 mm to 5 mm.

[0035] Specifically, the camera 10 has a camera target surface 11, a camera power interface 12, and a camera data transmission interface 13.

[0036] The camera target surface 11 is the effective light-sensitive area of ​​the photosensitive element in the camera 10. Its main function is to receive the light converged by the lens and convert the light signal into an electrical signal or a digital signal to ultimately form an image.

[0037] The camera power interface 12 is used to provide operating power to the camera 10.

[0038] The camera data transmission interface 13 connects to a display device, allowing the deep-hole polarization image acquired by the camera 10 to be transmitted to the display device. Inspectors can then obtain real-time, intuitive images of the object under test through the display device. For example, the deep-hole polarization image acquired by the camera 10 is transmitted to a controller via the camera data transmission interface 13. The controller is connected to a display, processes the acquired deep-hole polarization image, and displays the processed image on the display. The display device can be a computer or an industrial control computer, among other devices.

[0039] In some embodiments, the controller can also measure the aperture size in the deep hole polarization image and display the measurement results on a display, so that the inspector can directly obtain the measurement data of the deep hole size.

[0040] It should be noted that the center points of the camera target surface 11 and the polarizing cube beam splitter 25 are both located on the same straight line. Similarly, the center points of the linearly polarized laser 30, the laser entrance aperture 27, and the polarizing cube beam splitter 25 are all located on the same straight line. These two straight lines can be perpendicular to each other. The linearly polarized laser emitted from the linearly polarized laser 30 enters the lens barrel 26 through the laser entrance aperture 27 and strikes the polarizing cube beam splitter 25. The polarizing cube beam splitter 25 bends the linearly polarized laser by 90 degrees and strikes the inner surface of the deep aperture. The laser is then reflected back to the polarizing cube beam splitter 25 and enters the camera target surface 11 through the polarizing cube beam splitter 25, allowing the camera 10 to obtain a deep aperture polarized image.

[0041] Furthermore, the first part 21 of the lens barrel 26 is positioned near the deep hole, and the third part 23 of the lens barrel 26 is connected to the camera 10. The connection interface between the third part 23 and the camera 10 can be a C-Mount interface 14. The C-Mount interface 14 is a widely used lens interface standard for cameras 10, mainly used in industrial cameras 10, microscopes, security monitoring, and other fields. The C-Mount interface 14 adopts a threaded connection method and has the characteristics of simple structure, strong compatibility, and convenient installation. It is a key component for connecting the lens and the camera 10.

[0042] In some embodiments, the first part 21, the second part 22, and the third part 23 of the lens barrel 26 are all independent structures. The first part 21, the second part 22, and the third part 23 can be sequentially assembled to form the lens barrel 26. For example, the first part 21 and the second part 22, as well as the second part 22 and the third part 23, can be connected by threaded structures. This method makes the lens barrel 26 easy to carry and transport, while protecting it from deformation and damage during transportation.

[0043] In some embodiments, the first part 21, the second part 22, and the third part 23 of the lens barrel 26 may be an integrally formed structure, or two of the parts may be integrally formed, and the other part may be connected to the integral structure by splicing. This application does not make specific limitations here.

[0044] In some embodiments, the polarizing cube beam splitter 25 includes a first right-angle prism 251 and a second right-angle prism 252, with their inclined surfaces facing each other. The inclined surface of the first right-angle prism 251 faces away from the laser entrance aperture 27, and the inclined surface of the second right-angle prism 252 faces away from the camera 10. After the linearly polarized laser enters the lens barrel 26 through the laser entrance aperture 27, it is reflected by the inclined surface of the first right-angle prism 251 and exits through the light inlet 24. After being reflected through the deep aperture, the linearly polarized laser sequentially passes through the light inlet 24, through the first right-angle prism 251 and the second right-angle prism 252, and enters the camera 10 to achieve imaging of the deep aperture.

[0045] Specifically, the two right-angled prisms of the polarizing cubic beam splitter 25 can be made of ultraviolet fused silica. Ultraviolet fused silica is prepared using a vapor deposition process, resulting in an interior virtually free of bubbles, streaks, or crystalline particles, exhibiting excellent optical uniformity. This allows the optical surface of the beam splitter to achieve extremely high flatness, reducing light scattering and stray light, and possessing extremely high transmittance, thus improving image clarity. Simultaneously, a dielectric polarizing beam splitting film is coated on the surface of the ultraviolet fused silica to filter polarized light.

[0046] For example, the inclined surfaces of the first right-angle prism 251 and the second right-angle prism 252 can be bonded together using a photopolymer adhesive process. Using photopolymer adhesive avoids the stress, color difference, and aging problems associated with traditional adhesives. Photopolymer adhesive uses intermolecular van der Waals forces to tightly bond the surfaces of optical elements without introducing an additional dielectric layer, significantly reducing interface reflection loss and maintaining high light transmittance. Simultaneously, this process ensures that the optical surface accuracy of the two prisms is not affected, maintaining the uniformity and stability of the beam-splitting film, thereby improving the accuracy and reliability of polarization beam splitting and extending the lifespan of the elements. It is particularly suitable for fields with stringent optical performance requirements, such as laser processing and microscopic imaging.

[0047] In some embodiments, the inclined surface of the first right-angle prism 251 is coated with a dielectric polarizing beam splitter film.

[0048] It should be noted that, in this embodiment, a multilayer dielectric polarizing beam splitter film can be deposited on the inclined surface of the first right-angle prism 251. By depositing a multilayer dielectric polarizing beam splitter film on the inclined surface of the right-angle prism of the polarizing cube beam splitter 25, P-polarized light (polarized light parallel to the incident plane) is transmitted with almost no loss, while S-polarized light (polarized light perpendicular to the incident plane) is reflected in a specific direction, thereby achieving the separation and guidance of polarized light.

[0049] In this embodiment, the dielectric polarization beam splitter has the function of filtering linearly polarized laser light in the non-target direction and allowing linearly polarized laser light in the target direction to pass through the polarizing cube beam splitter 25, so that the camera 10 can acquire the linearly polarized laser light in the target direction.

[0050] In some embodiments, the field-of-view lens 20 further includes an aperture stop 28 located inside the third portion 23.

[0051] It should be noted that in order to obtain better imaging images, it is necessary to ensure that the center points of the camera target surface 11, the aperture 28, and the polarizing cube beam splitter 25 are on the same straight line.

[0052] In some embodiments, the field-of-view lens 20 further includes an aperture adjustment knob 281, which is connected to the aperture 28. The aperture adjustment knob 281 is located outside the third part 23 and is used to adjust the light-transmitting aperture of the aperture 28.

[0053] In this embodiment, the surface of the aperture adjustment knob 281 is provided with torsion stripes and is marked with a scale corresponding to the size of the light transmission aperture of the aperture 28, which facilitates fine adjustment by the testing personnel.

[0054] The inspector can adjust the aperture 281 to change the size of the light-gathering aperture. By controlling the size of the light-gathering aperture 28, the amount of light and depth of field can be adjusted, allowing the inspector to obtain the best deep-hole imaging effect.

[0055] In some embodiments, the second part 22 is provided with a connecting component 29, which has a connection port that communicates with the laser entrance aperture 27, and the connecting component 29 is connected to the linearly polarized laser 30.

[0056] In this embodiment, by providing a connecting component 29 in the second part 22, the linearly polarized laser 30 and the lens barrel 26 are fixed, preventing external vibrations and other factors from interfering with the direction of the linearly polarized laser emission.

[0057] Specifically, a linearly polarized laser bracket can also be provided on the linearly polarized laser 30. The linearly polarized laser 30 is fixedly connected to the connecting component 29 through the linearly polarized laser bracket to fix the linearly polarized laser 30.

[0058] It should be noted that the center points of the connecting component 29, the linearly polarized laser 30, and the polarized cube beam splitter 25 are all located on the same straight line, so that the linearly polarized laser can enter perpendicularly to the surface of the polarized cube beam splitter 25.

[0059] In some embodiments, the linearly polarized laser 30 includes a rotating linear polarizer 31 and a laser generator 32, wherein the rotating linear polarizer 31 is disposed in the light emission direction of the laser generator 32; the deep hole detection device further includes a rotation adjustment angle component 33, which is connected to the rotating linear polarizer 31 and is used to adjust the polarization direction of the linearly polarized laser.

[0060] By adjusting the polarization direction of the linearly polarized laser, the polarization direction of the reflected linearly polarized laser can be indirectly adjusted, effectively reducing the reflected linearly polarized laser from non-target directions and thus reducing the influence of stray light. This allows more linearly polarized laser from the target direction reflected back from the deep aperture to be captured by the field-of-view lens 20 and imaged in the camera 10, resulting in a clearer polarized image of the deep aperture.

[0061] For example, the rotation adjustment component 33 can be mounted on the linearly polarized laser support. By mounting the rotation adjustment component 33 on the linearly polarized laser support, the inspector can more accurately adjust the polarization direction of the linearly polarized laser 30, and the operation is convenient.

[0062] In some embodiments, the field-of-view lens 20 further includes a first lens group 211, a second lens group 221, and a third lens group 231 disposed within the lens barrel 26. The first lens group 211 is disposed between the light inlet 24 and the polarizing cube beam splitter 25, the second lens group 221 is disposed between the polarizing cube beam splitter 25 and the aperture stop 28, and the third lens group 231 is disposed between the aperture stop 28 and the camera 10.

[0063] In this embodiment, the first lens group 211 is mainly responsible for the initial convergence of light rays, determining the field of view range of the field-of-view lens 20, and initially correcting some aberrations. The second lens group 221 is mainly responsible for balancing complex aberrations such as chromatic aberration, field curvature, and coma, and controlling the light propagation path. The third lens group 231 is mainly responsible for completing the final convergence of light rays, correcting remaining aberrations, and matching the optical characteristics of the imaging surface (camera target surface 11). Through the cooperation of the three lens groups, wide-angle imaging without obvious distortion, uniform brightness without vignetting, clear overall image quality, and consistent sharpness at the edges and center are achieved.

[0064] Specifically, the field of view of the field-of-view lens 20 can reach 89°, which is sufficient to cover the bottom and surrounding walls of the deep hole. This allows it to collect more linearly polarized laser light reflected from the deep hole in more target directions, thus obtaining a more comprehensive image and related details of the interior of the deep hole.

[0065] In some embodiments, the deep hole detection device further includes a motor module 40 connected to the camera 10, which drives the camera 10 to move so that the field-of-view lens 20 approaches or moves away from the deep hole.

[0066] In this embodiment, since the distance between the field-of-view lens 20 and the deep hole is relatively short, the focusing method using the moving camera 10 and the field-of-view lens 20 can more accurately focus on the inside of the deep hole.

[0067] Specifically, by moving the motor module 40 up and down, the camera 10 can perform step-by-step scanning and segmented focusing on deep holes, which can be applied to deep holes of different diameters and depths and has high versatility.

[0068] In some embodiments, the motor module 40 includes a drive member 41 and a sliding device 42, the camera 10 is mounted on the sliding device 42, and the drive member 41 is used to drive the sliding device 42 to move the camera 10.

[0069] Specifically, the sliding device 42 can adopt a spiral lifting structure, which converts the rotational motion of the driving component 41 into a linear lifting motion along a spiral path through the meshing transmission of the screw and nut. This design enables the deep hole inspection equipment to have stable movement and precise focusing when making small step-by-step up-and-down movements relative to the deep hole.

[0070] The beneficial effects of this utility model are as follows: The deep hole detection device for mechanical components provided by this utility model includes a camera 10, a field-of-view lens 20, and a linearly polarized laser 30. The linearly polarized laser emitted by the linearly polarized laser 30 enters the lens barrel 26 of the field-of-view lens 20 through the laser entrance hole 27, and then exits through the polarizing cube beam splitter 25 and the light inlet 24 of the field-of-view lens 20. After being reflected by the deep hole of the mechanical component, it enters the camera 10 to realize the imaging of the deep hole of the mechanical component. The entire detection process includes the linearly polarized laser emitted by the linearly polarized laser 30, the transmission of the linearly polarized laser by the field-of-view lens 20, and the imaging by the camera 10. It does not require complicated operation, the detection process is simple, and the detection efficiency is high.

[0071] Furthermore, the linearly polarized laser 30 offers advantages such as more concentrated beam and higher energy efficiency, which helps illuminate the interior of deep holes. The polarizing cube beam splitter 25 in the field-of-view lens 20 effectively reduces reflected linearly polarized laser light from non-target directions, enhancing the detail contrast of the deep hole surface, especially for areas with different refractive indices or surface roughness. Capturing a polarized image of the deep hole using the camera 10 helps inspectors observe the details of the hole wall more clearly, while simultaneously measuring the deep hole diameter using the polarized image. The combined effect of these various optical components significantly improves the clarity of the deep hole polarized image, enhancing inspection accuracy.

[0072] By adding an aperture stop 28 and an aperture stop adjustment knob 281 to the field-of-view lens 20, the size of the aperture stop 28 can be adjusted to adjust the brightness and depth of field of the acquired deep hole polarization image, enabling the inspector to obtain the best deep hole imaging effect inside the deep hole being tested.

[0073] By setting the motor module 40, when the depth of the deep hole exceeds the depth of field of the field-of-view lens 20, the motor module 40 can be controlled in small steps to scan progressively, achieving segmented focusing of the deep hole. This can be applied to deep holes of different diameters and depths, avoiding the problem of detection blind spots and exhibiting high versatility.

[0074] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A deep hole inspection device for mechanical components, characterized in that, It includes a camera, a field-of-view lens, and a linearly polarized laser. The field-of-view lens includes a lens barrel and a polarizing cube beam splitter. The lens barrel includes a first part, a second part, and a third part connected in sequence. The first part, the second part, and the third part are interconnected. The first part is provided with a light inlet, the third part is connected to the camera, the polarizing cube beam splitter is located inside the second part, the second part is provided with a laser entrance hole, and the linearly polarized laser is located at the laser entrance hole; The polarizing cube beam splitter includes a first right-angle prism and a second right-angle prism, with the inclined surfaces of the first right-angle prism and the second right-angle prism arranged opposite each other. The inclined surface of the first right-angle prism faces away from the laser entrance aperture, and the inclined surface of the second right-angle prism faces away from the camera. The inclined surface of the first right-angle prism is coated with a dielectric polarizing beam-splitting film; The linearly polarized laser emitted by the linearly polarized laser enters the lens barrel through the laser entrance aperture, then exits through the polarizing cube beam splitter and the light inlet. After being reflected by the deep hole of the mechanical component, it sequentially passes through the light inlet, the polarizing cube beam splitter, and enters the camera to achieve the imaging of the deep hole.

2. The deep hole inspection device for mechanical components according to claim 1, characterized in that, The field-of-view lens also includes an aperture stop, which is located inside the third part.

3. The deep hole inspection device for mechanical components according to claim 2, characterized in that, The field-of-view lens also includes an aperture adjustment knob, which is connected to the aperture. The aperture adjustment knob is located outside the third part and is used to adjust the light-transmitting aperture of the aperture.

4. The deep hole inspection device for mechanical components according to claim 3, characterized in that, The second part is provided with a connecting component, which has a connection port that communicates with the laser incident hole and is connected to the linearly polarized laser.

5. The deep hole inspection device for mechanical components according to claim 4, characterized in that, The linearly polarized laser includes a rotating linear polarizer and a laser generator, with the rotating linear polarizer positioned in the light-emitting direction of the laser generator; the deep hole detection device further includes a rotation adjustment angle component connected to the rotating linear polarizer, which is used to adjust the polarization direction of the linearly polarized laser.

6. The deep hole inspection device for mechanical components according to claim 5, characterized in that, The field-of-view lens further includes a first lens group, a second lens group, and a third lens group disposed within the lens barrel. The first lens group is disposed between the light inlet and the polarizing cube beam splitter, the second lens group is disposed between the polarizing cube beam splitter and the aperture stop, and the third lens group is disposed between the aperture stop and the camera.

7. A deep hole inspection device for mechanical components according to any one of claims 1-6, characterized in that, The deep hole detection device also includes a motor module connected to the camera. The motor module drives the camera to move so that the field-of-view lens moves closer to or further away from the deep hole.

8. The deep hole inspection device for mechanical components according to claim 7, characterized in that, The motor module includes a drive component and a sliding device. The camera is mounted on the sliding device, and the drive component is used to drive the sliding device to move the camera.

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