Dual-focusing time-sharing coaxial optical imaging device

Abstract

The application relates to the technical field of optical element detection, and provides a double-focusing time-sharing coaxial optical imaging device, which comprises a mounting seat, a 45-degree light splitting prism and a lens barrel assembly; the mounting seat is provided with an object plane A side and an object plane B side; the optical axis of the object plane A side is perpendicular to the optical axis of the object plane B side; the 45-degree light splitting prism is arranged at the intersection position of the two optical axes and is used for bending and converging two orthogonal light paths into a coaxial light path of a single A / B shared optical axis; the lens barrel assembly comprises an imaging assembly and a lens barrel component; the imaging assembly is used for completing light path focusing, image collection and outputting imaging signals; and the lens barrel component is used for constraining light to propagate along a preset path. The application realizes double-viewing-angle time-sharing collection through the light splitting prism by using a single imaging assembly, effectively solves the problem of non-uniformity of the traditional multi-camera scheme reference, ensures that the imaging centers completely coincide, and can accurately calculate the spatial geometric position relationship between different surface features of a measured object, and has the advantages of compact structure, stable light path and high detection precision.

Description

Technical Field

[0001] This invention relates to the field of optical element detection technology, and specifically to a dual-focusing time-division coaxial optical imaging device. Background Technology

[0002] In existing optical component inspection technologies, for scenarios requiring simultaneous acquisition of features from both sides and multiple angles of a workpiece, a dual-camera or multi-camera independent imaging inspection scheme is commonly used. Two cameras are used to acquire images of two perpendicular surfaces of the object being measured, respectively, to obtain appearance features from different angles, thereby completing inspection tasks such as dimensional measurement, defect detection, and position matching.

[0003] However, existing dual-camera independent imaging schemes have significant drawbacks in practical applications: the independent deployment of multiple cameras results in mechanical installation deviations and optical path reference deviations, making it difficult to ensure that the imaging target center and imaging reference of the two perspectives are completely coincident. This leads to spatial reference misalignment and offset issues in the acquired images of the two object surfaces. Inconsistent references directly cause large errors and low matching accuracy in subsequent calculations of the spatial geometric relationship of the two-sided features, seriously affecting the accuracy and stability of precision detection.

[0004] Therefore, there is an urgent need to design an optical imaging device that can achieve dual-view time-division coaxial imaging and a unified imaging benchmark for a single camera. Summary of the Invention

[0005] To address the problems of existing technologies, such as the inability to measure and calculate the spatial geometric positional relationship of the object being measured, the present invention aims to provide a dual-focusing time-division coaxial optical imaging device.

[0006] To address the above problems, the present invention provides the following technical solution: A dual-focusing time-division coaxial optical imaging device, comprising: The mounting base has an object surface A side and an object surface B side, and the optical axis of the object surface A side is perpendicular to the optical axis of the object surface B side. A 45-degree beam splitter is positioned at the intersection of the optical axis on the A side of the object plane and the optical axis on the B side of the object plane. It is used to bend and merge two orthogonal optical paths into a single coaxial optical path with a shared A / B optical axis. The lens barrel assembly is coaxially arranged with the 45-degree beam splitter along the shared optical axis A / B. The lens barrel assembly includes an imaging component and a lens barrel tube component. The imaging component is used to receive the beam combining optical path, complete the optical path focusing, image acquisition and output imaging signal; The lens tube component is used to constrain light rays to propagate stably along a preset path.

[0007] In some embodiments, the mounting base has an outwardly open first cavity and a second cavity respectively corresponding to the object surface A side and the object surface B side. The 45-degree beam splitter is located in the mounting base at the intersection of the first cavity and the second cavity, and is directly opposite the incident light path of the first cavity and the second cavity.

[0008] In some embodiments, the lens tube assembly includes a first lens tube, a second lens tube, and a third lens tube that are connected in sequence, and the first lens tube, the second lens tube, and the third lens tube are coaxially arranged.

[0009] In some embodiments, the imaging component includes a first imaging convex lens and a second imaging convex lens; The first imaging convex lens is disposed inside the first lens tube; The end of the third lens tube away from the second lens tube extends into the mounting base, and the extended end is provided with the second imaging convex lens, which is arranged opposite to the 45-degree beam splitter.

[0010] In some embodiments, the first imaging convex lens is coaxially disposed with the first lens tube; The second imaging convex mirror is coaxially arranged with the third mirror tube.

[0011] In some embodiments, the second lens tube is provided with an aperture at the docking end near the first lens tube. The aperture is used to adjust the light-transmitting aperture, thereby controlling the imaging depth of field and the amount of light entering the lens.

[0012] In some embodiments, the first cavity is provided with an A-side LED light panel, and the A-side LED light panel is provided with an A-side focusing ring; The LED panel on side A has a first ring of LED lights located inside the spotlight ring on side A. The LED panel on side A has a second ring of LED lights and a third ring of LED lights located on the outer periphery of the spotlight ring on side A, arranged sequentially from the side closer to the spotlight ring on side A to the side farther away from the spotlight ring on side A. The third ring of LED lights surrounds the outer periphery of the second ring of LED lights on side A.

[0013] In some embodiments, the second cavity is provided with a B-side LED light panel, and the B-side LED light panel is provided with a B-side focusing ring; The B-side LED light panel has a first ring of LED lights located inside the B-side focusing ring. The B-side LED light panel has a second ring of LED lights and a third ring of LED lights located on the outer periphery of the B-side focusing ring, arranged sequentially from the side closer to the B-side focusing ring to the side farther away from the B-side focusing ring. The third ring of LED lights surrounds the outer periphery of the second ring of LED lights.

[0014] In some embodiments, the imaging assembly further includes an imaging camera, wherein the imaging camera is disposed at one end of the first lens tube away from the second lens tube, and the imaging camera is coaxially disposed with the first lens tube.

[0015] In some embodiments, an adjustment ring is provided between the imaging camera and the first lens tube. The adjustment ring is sleeved on the end of the first lens tube and connected to the imaging camera, and is used to adjust the attitude of the imaging camera to ensure that the imaging reference is coaxially aligned with the optical path.

[0016] The beneficial effects of this invention are: 1. This invention sets mutually perpendicular optical axes on the A and B sides of the object plane, and uses a 45-degree beam splitter to bend and merge the two orthogonal optical paths into a single coaxial optical path with a shared A / B optical axis. This achieves an imaging mode with a single optical path and a single imaging reference for dual-viewpoint sharing, completely abandoning the traditional dual-camera independent imaging structure. It eliminates the problems of multi-camera assembly errors and optical path reference offset from the root, making the imaging target centers of the two object planes completely coincide, and greatly improving the accuracy of spatial geometric position calculation and detection consistency of corresponding features on both sides.

[0017] 2. This invention adopts a dual-optical-path orthogonal coaxial and time-division imaging working mode, which can effectively avoid the problems of image ghosting and optical path crosstalk caused by dual-optical-path synchronous imaging, ensure the purity and accuracy of independent imaging of each object surface, significantly improve the stability and detection accuracy of machine vision precision inspection, and adapt to the double-sided and multi-angle feature detection needs of various high-precision workpieces. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of a dual-focusing time-division coaxial optical imaging device according to the present invention; Figure 2 for Figure 1 A magnified view of a section at point C; Figure 3 This is a schematic diagram showing the propagation of the optical axis in a dual-focusing time-division coaxial optical imaging device according to the present invention; Figure 4 This is a side view of a dual-focusing time-division coaxial optical imaging device according to the present invention; Figure 5 This is a bottom view of a dual-focus time-division coaxial optical imaging device according to the present invention.

[0019] Figure label: Mounting base 100, surface A side 100a, surface B side 100b, first cavity 110, second cavity 120; 45-degree beam splitter prism 200; Lens tube assembly 300, imaging assembly 310, first imaging convex lens 311, second imaging convex lens 312, imaging camera 313, lens tube assembly 320, first lens tube 321, second lens tube 322 and third lens tube 323, and adjustment ring 330; Aperture 400; LED light panel 500 on side A, spotlight ring 510 on side A, first ring LED light 511 on side A, second ring LED light 512 on side A, third ring LED light 513 on side A; LED light panel 600 on side B, spotlight ring 610 on side B, first ring LED light 611 on side B, second ring LED light 612 on side B, third ring LED light 613 on side B. Detailed Implementation

[0020] 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. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] For ease of description of the first, second, and third directions in the embodiments of this application, the first direction is the left-right direction in the figures, the second direction is the front-back direction in the figures, and the third direction is the up-down direction in the figures. The x-axis arrow direction is referred to as the "right" direction, the y-axis arrow direction as the "up" direction, and the z-axis arrow direction as the "back" direction, but these are not the sole limitations in the actual application of this application.

[0023] like Figures 1 to 5 As shown, this embodiment provides a dual-focus time-division coaxial optical imaging device, mainly applied in optical component inspection scenarios. It is used to perform time-division, common-reference high-definition imaging of two mutually perpendicular surfaces of a workpiece, realizing the spatial position correlation detection of dual-surface features. Specifically, it includes: a mounting base 100, a 45-degree beam splitter prism 200, and a lens barrel assembly 300.

[0024] Mounting base 100, as the core support carrier of the dual-focus time-division coaxial optical imaging device, plays a key supporting and positioning role in the entire device. It not only provides a precise mounting reference for other optical components, but also achieves effective isolation and guidance of the optical path through its internal cavity design. The mounting base 100 has an object surface A side 100a and an object surface B side 100b, which are used to receive optical signals from different directions, respectively. The design of the object surface A side 100a and the object surface B side 100b has the following significant features: First, the optical axis on object plane A is perpendicular to the optical axis on object plane B. This orthogonal arrangement allows the device to simultaneously capture target information in two dimensions, significantly expanding the imaging field of view. Second, the surfaces of object plane A 100a and object plane B 100b are precision polished to reduce light signal scattering and loss, ensuring stable image quality. Furthermore, the optical axes of object plane A 100a and object plane B 100b intersect at the center of the mounting base 100 and coincide with the optical axis of the 45-degree beam splitter 200. This design ensures efficient and accurate optical path transmission, laying a solid foundation for subsequent optical beam combining and imaging processing.

[0025] The 45-degree beam splitter prism 200 is located at the intersection of the optical axis on the A side of the object plane and the optical axis on the B side of the object plane. It is the core optical element for realizing the coaxial synthesis of two optical paths. It is used to bend and merge two orthogonal optical paths into a single coaxial optical path with a shared A / B optical axis, so that the two imaging optical paths in different directions eventually converge to the same imaging axis, achieving complete overlap of the target center in dual-view imaging.

[0026] The lens barrel assembly 300 and the 45-degree beam splitter prism 200 are coaxially arranged along the shared optical axis A / B. The lens barrel assembly 300 includes an imaging component 310 and a lens barrel tube component 320.

[0027] Among them, the lens tube component 320 serves as an optical path constraint structure, used to constrain the light after beam combining to propagate stably along a preset path throughout the entire process, avoiding light divergence, deviation, and stray light interference, and ensuring the regularity and stability of optical path transmission. The imaging component 310, as an integrated imaging execution structure, is used to receive the light path after beam combining by the 45-degree beam splitter 200, complete the optical path focusing, precision imaging, image acquisition and output standard imaging signals for back-end equipment to perform defect detection, size measurement and spatial position calculation.

[0028] In this embodiment, the mounting base 100 has an outwardly open first cavity 110 and a second cavity 120 corresponding to the object surface A side 100a and object surface B side 100b, respectively. The open structure facilitates the smooth incident light from the light source onto the surface of the object being measured. The position, shape, and function of these cavities have a significant impact on the overall performance of the device. The axes of the first cavity 110 and the second cavity 120 are completely aligned with the optical axes of the object surface A side 100a and object surface B side 100b. This design not only provides ample physical space for the transmission of optical signals but also effectively reduces stray light interference through the reflection effect of the inner walls of the cavities. In addition, a 45-degree beam splitter 200 is located inside the mounting base 100 at the intersection of the first cavity 110 and the second cavity 120, and is directly opposite the incident light paths of the first cavity 110 and the second cavity 120, enabling precise beam combining of the two orthogonal optical paths. By rationally designing the geometric parameters of the cavity, the device can achieve efficient optical path integration within a limited space, while also providing convenient conditions for the installation and debugging of other optical components.

[0029] The 45-degree beam splitter prism 200, as a key optical component in a dual-focusing time-division coaxial optical imaging device, plays a decisive role in the beam combining effect of the optical path due to its optical characteristics. In this embodiment, the beam splitter prism is preferably made of high-quality quartz glass, which has a high refractive index (n=1.458) and low dispersion characteristics, enabling efficient optical signal transmission over a wide wavelength range. Furthermore, one surface of the 45-degree beam splitter prism 200 is coated with a dielectric film with a reflectivity of 50% and a transmittance of 50%, thus splitting the incident light into two beams of equal intensity reflected and transmitted light. When the two orthogonal optical paths enter the mounting base 100 from the object plane A side 100a and object plane B side 100b respectively, they undergo refraction and reflection at the 45-degree beam splitter prism 200, ultimately being combined into a single coaxial optical path sharing an A / B optical axis. This process fully utilizes the optical characteristics of the beam splitter prism, ensuring efficient integration and transmission of the optical signal.

[0030] In this embodiment, the lens tube component 320 includes a first lens tube 321, a second lens tube 322, and a third lens tube 323 connected in sequence. Its main function is to constrain the light propagation path and ensure stable transmission of the optical signal. The first lens tube 321, the second lens tube 322, and the third lens tube 323 are coaxially assembled to form a complete axial optical path channel, ensuring that the combined light beam is transmitted coaxially throughout the entire process and avoiding the optical path offset problem caused by the segmented lens tube structure.

[0031] In this embodiment, the imaging component 310 includes a first imaging convex lens 311 and a second imaging convex lens 312; wherein, the first imaging convex lens 311 is disposed inside the first lens tube 321, close to the imaging camera 313, and is used to perform secondary focusing on the final beam combining optical path, correct imaging distortion, and improve imaging clarity. The end of the third lens tube 323 away from the second lens tube 322 extends into the mounting base 100. The extended end is provided with a second imaging convex lens 312. The second imaging convex lens 312 is arranged opposite to the 45-degree beam splitter prism 200 and is used to converge and shape the initial light path after the beam splitter prism is aligned, gather the diverging light rays, and ensure that the focal length of the dual light path imaging is uniform.

[0032] In this embodiment, the first imaging convex mirror 311 is coaxially arranged with the first lens tube 321, and the second imaging convex mirror 312 is coaxially arranged with the third lens tube 323. The two convex mirrors are strictly coaxially matched and share the optical axis, which can further eliminate optical path eccentricity error and ensure that the imaging focal length and imaging magnification of the A and B optical paths are completely consistent.

[0033] The dual-focusing function relies on the precise coordinated operation of the first imaging convex lens 311 and the second imaging convex lens 312. When the combined light beam enters the lens tube assembly 300, it is first initially focused by the second imaging convex lens 312. This lens is located inside the third lens tube 323, and its focal length and radius of curvature are optimized to adapt to different imaging distances. Subsequently, the light continues to propagate to the first lens tube 321, where it is refocused at the first imaging convex lens 311.

[0034] The second imaging convex lens 312 is positioned opposite the 45-degree beam splitter prism 200. Its position and focal length can be finely adjusted via the adjustment ring 330, thereby achieving precise focusing at different target distances. At different imaging distances, adjusting the position of the second imaging convex lens 312 changes the convergence point of the light rays, ensuring that the imaging plane is always located on the image sensor of the imaging camera 313. This dual-focusing mechanism not only improves imaging resolution but also significantly enhances the device's adaptability to different scenes. Furthermore, the dual-focusing design effectively compensates for aberrations common in single-lens systems, further improving image quality.

[0035] In this embodiment, the second lens tube 322 is provided with an aperture 400 at the docking end near the first lens tube 321. Its main function is to manually or automatically adjust the size of the light-transmitting aperture. By changing the amount of light transmitted, it can flexibly adapt to the detection needs of different light and dark environments and workpieces of different materials, effectively control the imaging depth range, realize clear imaging of objects at near and far, and filter stray light to further optimize the imaging quality.

[0036] The aperture of f / 400 has a maximum aperture diameter of 25mm, a minimum aperture diameter of 5mm, and an adjustment step of 1mm, allowing for flexible adjustment of light throughput within a certain range. When the aperture diameter is larger, the device can obtain a higher amount of light, suitable for imaging tasks under low-light conditions; while when the aperture diameter is smaller, the device can achieve a greater depth of field, suitable for imaging scenarios requiring high detail. Through the rational design of the aperture parameters and adjustment mechanism, the device can maintain stable imaging performance in different working environments, providing a reliable guarantee for subsequent image processing.

[0037] In this embodiment, the first cavity 110 is provided with an A-side LED light disk 500, the main function of which is to provide uniform and adjustable illumination for the A-side 100a of the object surface to improve the imaging quality. The A-side LED light disk 500 is provided with an A-side focusing ring 510, which is made of a high reflectivity material and can concentrate the light emitted by the LED light onto the A-side 100a of the object surface, thereby improving the light energy utilization rate. On the A-side LED light panel 500, an A-side first ring LED light 511 is provided on the inner side of the A-side focusing ring 510 to provide basic lighting. On the outer periphery of the A-side LED light panel 500, an A-side second ring LED light 512 and an A-side third ring LED light 513 are arranged sequentially from the side closer to the A-side focusing ring 510 to the side farther away from the A-side focusing ring 510, forming a multi-layer ring lighting structure. The multi-layer lights can achieve supplementary lighting effects at different angles, effectively eliminating reflections and shadows on the workpiece surface, and adapting to the lighting needs of workpieces with different shapes.

[0038] The third ring of LED lights 513 on side A is arranged around the outer periphery of the second ring of LED lights 512 on side A. The second ring of LED lights 512 on side A is used to enhance the lighting intensity, while the third ring of LED lights 513 on side A is used to meet the high brightness lighting requirements. By rationally arranging the number and power of LED beads, the device can achieve flexible lighting adjustment under different imaging conditions, thereby significantly improving the contrast and clarity of the image.

[0039] In this embodiment, the second cavity 120 is provided with a B-side LED light panel 600, which is similar in design and function to the A-side LED light panel 500. It is mainly used to provide uniform and adjustable illumination for the B-side 100b of the object surface. The B-side LED light panel 600 is provided with a B-side focusing ring 610, which is also made of a high reflectivity material. It can efficiently focus the light emitted by the LED light onto the B-side 100b of the object surface, thereby reducing the waste of light energy. On the B-side LED light panel 600, inside the B-side focusing ring 610, there is a first ring of LED lights 611 for providing basic lighting. On the outer periphery of the B-side LED light panel 600, from the side closer to the B-side focusing ring 610 to the side farther away from the B-side focusing ring 610, there are a second ring of LED lights 612 and a third ring of LED lights 613. The third ring of LED lights 613 surrounds the outer periphery of the second ring of LED lights 612. The second ring of LED lights 612 is used to enhance the lighting intensity, and the third ring of LED lights 613 is used to meet the high brightness lighting requirements. By reasonably arranging the number and power of LED beads, the device can achieve flexible lighting adjustment under different imaging conditions, thereby significantly improving the contrast and clarity of the image.

[0040] By independently controlling the illumination intensity of the LED light panel 500 on side A and the LED light panel 600 on side B, the device can flexibly adjust the lighting conditions according to actual needs, thereby achieving the best imaging effect in different imaging scenarios.

[0041] In this embodiment, the imaging component 310 also includes an imaging camera 313. The imaging camera 313 is located at the end of the first lens tube 321 away from the second lens tube 322. During operation, light first passes through the first imaging convex lens 311 for initial focusing, and then passes through the second imaging convex lens 312 to further optimize the focusing effect, and finally reaches the imaging camera 313 to complete image acquisition and signal output. The imaging camera 313 is coaxially set with the first lens tube 321.

[0042] In this embodiment, an adjustment ring 330 is provided between the imaging camera 313 and the first lens tube 321. The adjustment ring 330 is sleeved on the end of the first lens tube 321 and connected to the imaging camera 313. Its main function is to fine-tune the attitude of the imaging camera 313 to ensure that the imaging reference is coaxially aligned with the optical path. It is connected to the imaging camera 313 by six evenly distributed adjustment screws. The adjustment range of each screw is ±1mm, and the adjustment accuracy can reach 0.05mm, enabling fine adjustment of the imaging camera 313 in three-dimensional space. Furthermore, the outer surface of the adjustment ring 330 is engraved with scale lines, allowing the operator to intuitively understand the adjustment amount. By rationally designing the structure and parameters of the adjustment ring 330, the device can quickly complete the alignment operation of the imaging reference under different working conditions, thereby significantly improving imaging efficiency and accuracy.

[0043] The time-division coaxial mechanism is one of the core innovations of this device. Its design goal is to image targets on both sides of the object plane (A and B) at different times, while ensuring the coaxiality of the optical path. To achieve this, the device employs a programmable light source switching system and dynamic optical path adjustment technology. During a certain time period, the system prioritizes activating the light source on the object plane A side (e.g., the LED light panel 500 on A side) while simultaneously deactivating the light source on the object plane B side (e.g., the LED light panel 600 on B side). At this time, light enters the device only from the object plane A side and completes the imaging process. During another time period, the system switches to the object plane B side light source and deactivates the object plane A side light source, thus achieving time-division imaging of targets on both sides. Throughout this process, the 45-degree beam splitter prism 200 and the lens barrel assembly 300 remain in fixed positions, ensuring that the coaxiality of the optical path is not affected. Furthermore, by fine-tuning the attitude of the imaging camera 313 through the adjustment ring 330, the reference alignment accuracy of the imaging on both sides can be further optimized. This time-division coaxial mechanism not only improves the imaging efficiency of the device, but also significantly expands its application scenarios, especially in situations where multiple orthogonal planes need to be monitored simultaneously.

[0044] The optical path of the dual-focus time-division coaxial optical imaging device is ingeniously designed, ensuring efficient light transmission and high imaging quality. Light enters the device from object plane A side 100a and object plane B side 100b, propagating along their respective optical axes. At their intersection within the mounting base 100, they are combined by a 45-degree beam-splitting prism 200. Specifically, the light from object plane A first passes through the first cavity 110, while the light from object plane B passes through the second cavity 120. Both are refracted and reflected at the 45-degree beam-splitting prism 200, ultimately merging into a single A / B shared optical axis. The combined light then enters the lens tube assembly 300, sequentially passing through the third lens tube 323, the second lens tube 322, and the first lens tube 321. During this process, the light is constrained by the lens tube assembly 320, propagating stably along a preset path, avoiding optical path deviation or energy loss. Finally, the light reaches the imaging component 310, where it is focused by the combined action of the first imaging convex lens 311 and the second imaging convex lens 312, and then captured and output as a digital signal by the imaging camera 313. This optical path design not only achieves efficient light utilization, but also significantly improves the clarity and stability of the image through the precise cooperation between the beam splitter and the lens barrel assembly.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A dual-focusing time-division coaxial optical imaging device, characterized in that, include: The mounting base has an object surface A side and an object surface B side, and the optical axis of the object surface A side is perpendicular to the optical axis of the object surface B side. A 45-degree beam splitter is positioned at the intersection of the optical axis on the A side of the object plane and the optical axis on the B side of the object plane. It is used to bend and merge two orthogonal optical paths into a single coaxial optical path with a shared A / B optical axis. The lens barrel assembly is coaxially arranged with the 45-degree beam splitter along the shared optical axis A / B. The lens barrel assembly includes an imaging component and a lens barrel tube component. The imaging component is used to receive the beam combining optical path, complete the optical path focusing, image acquisition and output imaging signal; The lens tube component is used to constrain light rays to propagate stably along a preset path.

2. The dual-focusing time-division coaxial optical imaging device according to claim 1, characterized in that: The mounting base has an outwardly open first cavity and a second cavity on the object surface A side and object surface B side, respectively. The 45-degree beam splitter is located inside the mounting base at the intersection of the first cavity and the second cavity, and is directly opposite the incident light path of the first cavity and the second cavity.

3. The dual-focusing time-division coaxial optical imaging device according to claim 2, characterized in that: The lens tube assembly includes a first lens tube, a second lens tube, and a third lens tube that are connected in sequence, and the first lens tube, the second lens tube, and the third lens tube are coaxially arranged.

4. The dual-focusing time-division coaxial optical imaging device according to claim 3, characterized in that: The imaging assembly includes a first imaging convex lens and a second imaging convex lens; The first imaging convex lens is disposed inside the first lens tube; The end of the third lens tube away from the second lens tube extends into the mounting base, and the extended end is provided with the second imaging convex lens, which is arranged opposite to the 45-degree beam splitter.

5. The dual-focusing time-division coaxial optical imaging device according to claim 4, characterized in that: The first imaging convex lens is coaxially arranged with the first lens tube; The second imaging convex mirror is coaxially arranged with the third mirror tube.

6. The dual-focusing time-division coaxial optical imaging device according to claim 4, characterized in that: The second lens tube is provided with an aperture at the joint end near the first lens tube. The aperture is used to adjust the light-transmitting aperture, thereby controlling the imaging depth of field and the amount of light entering the lens.

7. The dual-focusing time-division coaxial optical imaging device according to claim 2, characterized in that: The first cavity is provided with an A-side LED light panel, and the A-side LED light panel is provided with an A-side focusing ring; The LED panel on side A has a first ring of LED lights located inside the spotlight ring on side A. The LED panel on side A has a second ring of LED lights and a third ring of LED lights located on the outer periphery of the spotlight ring on side A, arranged sequentially from the side closer to the spotlight ring on side A to the side farther away from the spotlight ring on side A. The third ring of LED lights surrounds the outer periphery of the second ring of LED lights on side A.

8. The dual-focusing time-division coaxial optical imaging device according to claim 2, characterized in that: The second cavity is equipped with a B-side LED light panel, and the B-side LED light panel is equipped with a B-side focusing ring; The B-side LED light panel has a first ring of LED lights located inside the B-side focusing ring. The B-side LED light panel has a second ring of LED lights and a third ring of LED lights located on the outer periphery of the B-side focusing ring, arranged sequentially from the side closer to the B-side focusing ring to the side farther away from the B-side focusing ring. The third ring of LED lights surrounds the outer periphery of the second ring of LED lights.

9. The dual-focusing time-division coaxial optical imaging device according to claim 4, characterized in that: The imaging assembly further includes an imaging camera, which is located at one end of the first lens tube away from the second lens tube, and is coaxially arranged with the first lens tube.

10. The dual-focusing time-division coaxial optical imaging device according to claim 9, characterized in that: An adjustment ring is provided between the imaging camera and the first lens tube. The adjustment ring is sleeved on the end of the first lens tube and connected to the imaging camera. It is used to adjust the attitude of the imaging camera to ensure that the imaging reference is coaxially aligned with the optical path.

Images