Endoscope

Abstract

An endoscope includes an optical module and a chip module. The chip module receives an imaging beam acquired by the endoscope through the optical module and generates an image signal. The optical module includes a mount, a light window, and an anti-glare component. The mount has a mounting hole and a mounting cavity communicating with the mounting hole. The light window is welded into the mounting hole. At least one of the mounting hole and the mounting cavity has a mounting portion. The anti-glare component is disposed on the mounting portion, with one end contacting the light window and the other end extending away from the mounting hole to absorb reflected light irradiating the mounting portion.

Description

Technical Field

[0001] This application relates to the field of endoscopy technology, and more particularly to an endoscope. Background Technology

[0002] As a modern medical instrument, the airtightness and waterproofness of the internal cavity of an endoscope are crucial for clear imaging. The endoscope mount and aperture, a combination of the lens and stainless steel, are often the core of the overall sealing of the instrument. They are typically fixed by welding to avoid degrading the endoscope's sealing performance due to repeated high-temperature and high-pressure sterilization. However, during use, the confined space and smooth surface of the endoscope mount make it extremely prone to reflecting light near the aperture, causing glare and poor image quality, thus affecting the doctor's assessment of the patient's condition. Summary of the Invention

[0003] This application provides an endoscope that can prevent stray light problems such as glare and ghosting in the optical path by using an anti-glare component fixed on the mounting hole and / or mounting cavity, thereby making the endoscope image clearer.

[0004] This application provides an endoscope, including an optical module and a chip module, wherein the chip module receives the imaging beam acquired by the endoscope through the optical module and generates an image signal; The optical module includes a lens mount, a light window, and an anti-glare component. The lens mount has a mounting hole and a mounting cavity communicating with the mounting hole. The light window is welded into the mounting hole. At least one of the mounting hole and the mounting cavity has a mounting portion. The anti-glare component is disposed on the mounting portion. One end of the anti-glare component contacts the light window, and the other end of the anti-glare component extends toward the side away from the mounting hole to absorb reflected light illuminating the mounting portion.

[0005] In an embodiment of the endoscope of this application, the mounting hole includes a first countersunk hole and a second countersunk hole with an inner diameter smaller than that of the first countersunk hole. A metal film is formed at the part where the light window is connected to the mirror base. The metal film is welded to the first countersunk hole. The mounting part is disposed in the second countersunk hole. The anti-glare component covers at least a portion of the mounting part.

[0006] In an embodiment of the endoscope of this application, the ratio of the thickness of the light window to the axial length of the mounting portion along the mirror mount is between 0.1 and 10.

[0007] In an embodiment of the endoscope of this application, the ratio of the outer diameter of the light window to the outer diameter of the anti-glare component is not greater than 2.

[0008] In an endoscope according to one embodiment of this application, the anti-glare component includes a black metal ring, the mounting portion is formed by at least a portion of the inner wall of the second countersunk hole, and the black metal ring is fixedly connected to the inner wall of the second countersunk hole.

[0009] In one embodiment of the endoscope of this application, the black metal ring is laser-welded to the inner wall of the second countersunk hole; or, the black metal ring is fixed to the inner wall of the second countersunk hole with glue.

[0010] In an endoscope according to one embodiment of this application, at least a portion of the black metal ring protrudes from the second countersunk hole toward the first countersunk hole, and the light window abuts against the black metal ring.

[0011] In an endoscope according to one embodiment of this application, the anti-glare component includes a black coating, the mounting portion is formed by at least a portion of the inner wall of the second countersunk hole, and the black coating is applied to the outer side of the mounting portion.

[0012] In an endoscope according to one embodiment of this application, the black coating can withstand a temperature of not less than 300°C.

[0013] In an embodiment of the endoscope of this application, the mounting hole includes a first mounting hole and a second mounting hole, and the anti-glare component is disposed in the second countersunk hole of the first mounting hole and the second mounting hole.

[0014] In an embodiment of the endoscope of this application, the light window includes a sapphire lens, which is fixed in the first countersunk hole of the first mounting hole and the second mounting hole by brazing.

[0015] In an embodiment of the endoscope of this application, the thickness of the light window is not greater than the depth of the first countersunk hole.

[0016] The technical solution provided in this application embodiment may include the following beneficial effects: This application designs an endoscope, including a mount, a light window, and an anti-glare component. The light window is welded into the mounting hole of the mount, and the anti-glare component is disposed on the mounting part of the mounting hole and / or mounting cavity. This solves the problem that the endoscope is prone to glare at the position near the light window or at the step formed by the mount and the light window, so that the reflected light illuminating the position near the light window or at the step formed by the mount and the light window can be absorbed, reducing the glare generated by the light in the mount and improving the imaging quality of the lens.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the structure of an endoscope provided in one embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the endoscope in the image; Figure 3 yes Figure 2 A cross-sectional schematic diagram of the optical module in the diagram; Figure 4 yes Figure 2 A cross-sectional view of the optical module from another angle; Figure 5 yes Figure 4 An exploded view of the optical module in the diagram; Figure 6 yes Figure 4 A schematic diagram of the mirror mount, light window, and anti-glare components; Figure 7 yes Figure 6 A schematic diagram of the mirror mount structure; Figure 8 yes Figure 6 A cross-sectional schematic diagram of the mirror mount.

[0020] Explanation of reference numerals in the attached figures: 100. Optical module; 10. Mirror base; 11. Mounting hole; 11a. First mounting hole; 12a. Second mounting hole; 111. First countersunk hole; 112. Second countersunk hole; 12. Mounting cavity; 13. Mounting position; 20. Lens barrel; 30. Light window; 40. Anti-glare components; 50. Lens assembly; 51. Negative lens; 52. Steering mirror; 53. Plano-convex lens; 54. Plane lens; 55. Meniscus lens; 56. Biconvex lens; 200. Chip module. Detailed Implementation

[0021] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should also be understood that the terminology used in this application specification is merely for describing specific realities within the scope of this application. It is important to understand that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. 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 indicated technical features. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] like Figure 1 and Figure 2 As shown, this application provides an endoscope, including an optical module 100 and a chip module 200. The chip module 200 receives the imaging beam acquired by the endoscope through the optical module 100 and generates an image signal. The generated image signal is sent to the endoscope processor, enabling the endoscope processor to process the received image signal and then send the processed image signal to a display device so that an image corresponding to the received image signal can be displayed on the display device.

[0025] In one optional embodiment, the chip module 200 includes a housing, a chip assembly, and an adjustment component. The chip assembly is installed inside the housing and includes components such as an image sensor and an endoscope processor. The image sensor is used to convert light signals into electrical signals, and the endoscope processor is used to amplify, filter, and process the electrical signals output by the image sensor before transmitting the processed electrical signals to the display device for further processing.

[0026] In one alternative implementation, such as Figure 2 and Figure 3As shown, the optical module 100 includes a lens barrel 20, a lens mount 10, an optical window 30, and a lens assembly 50. One end of the lens mount 10 is connected to the housing, and the lens mount 10 is mounted on the other end of the lens barrel 20. The optical window 30 is mounted on the lens mount 10. The lens assembly 50 is fixed in the cavity formed by the lens barrel 20 and the lens mount 10 and extends along the length of the lens barrel 20, used to transmit the imaging beam to the chip assembly so that the chip module 200 can generate an image signal. To control cross-infection and improve medical safety, endoscopes are usually sterilized using high-temperature and high-pressure methods. This application uses welding to fix the optical window 30 to the lens mount 10, preventing water vapor from seeping into the interior of the endoscope from the joint between the optical window 30 and the lens mount 10 under high temperature and pressure, thus preventing fogging of the lens assembly 50 and image sensor.

[0027] In one alternative implementation, such as Figure 2 , Figure 5 and Figure 8 As shown, the endoscope mount 10 is provided with a mounting hole 11 and a mounting cavity 12 communicating with the mounting hole 11. The light window 30 is welded into the mounting hole 11. The endoscope mount 10 and the mounting cavity 12 are connected to form a cavity for fixing the lens assembly 50. The chip module 200 is connected to the end of the cavity away from the endoscope mount 10. In this embodiment, at least one of the mounting hole 11 and the mounting cavity 12 is provided with a mounting portion 13. An anti-glare component 40 is provided on the mounting portion 13. One end of the anti-glare component 40 contacts the light window 30, and the other end of the anti-glare component 40 extends toward the side away from the mounting hole 11 to absorb the reflected light irradiated on the mounting portion 13. This solves the problem that the endoscope is prone to glare at the position near the light window 30 or at the step formed by the endoscope mount 10 and the light window 30, thereby reducing the glare phenomenon and ensuring the normal operation of the endoscope.

[0028] For example, because the space of the mounting hole 11 and the mounting cavity 12 is relatively small and the surface is smooth, reflected light is easily generated near the light window 30 or at the step formed by the lens mount 10 and the light window 30, which can cause glare. Therefore, when the light light passes through the light window 30 from the observation area and returns, some of the light light will be scattered on the surface of the mounting hole 11 near the light window 30 or at the step formed by the mounting hole 11 and the light window 30 and absorbed by the anti-glare component 40. This prevents the reflected light that causes glare from passing through the lens assembly 50 and entering the image sensor. It also solves the optical problems of stray light such as glare and ghosting caused by the endoscope in places where light reflection is easy to occur, and improves the imaging quality of the endoscope. In addition, it can also improve the space utilization inside the lens mount 10 and make the endoscope smaller.

[0029] Specifically, to avoid irritation or other unpleasant experiences for patients when the endoscope is inserted, the outer diameter of the endoscope is kept as small as possible. Generally, the outer diameter of the endoscope does not exceed 10mm. It is also necessary to ensure that water vapor does not seep into the endoscope from the joint between the light window 30 and the endoscope base 10 under high temperature and pressure, so that the endoscope can be sterilized under high temperature and pressure. This limits the size of the endoscope base 10 and the connection process between the light window 30 and the endoscope base 10, making it impossible to implement appropriate anti-glare measures within the narrow mounting hole 11 and mounting cavity 12. Therefore, this application provides a high-temperature resistant anti-glare component 40 at the mounting location 13 of the mounting hole 11 and / or mounting cavity 12. This ensures that the anti-glare component 40 is not affected by the welding temperature of the light window 30 and the endoscope base 10, preventing the anti-glare component 40 from moving, deforming, or even melting during the welding process, thus ensuring the overall quality of the endoscope.

[0030] Furthermore, by having the anti-glare component 40 in contact with the light window 30, this application can not only more effectively cover areas inside the endoscope that are prone to light reflection, preventing light from passing through the gap between the light window 30 and the anti-glare component 40 and forming reflected light, which would cause obvious ghosting, halos, or glare after entering the lens assembly 50, thus significantly degrading the image quality; it also facilitates the positioning of the anti-glare component 40, allowing it to be directly fixed to the mounting position 13 while ensuring contact between the anti-glare component 40 and the light window 30, without restricting the relative distance between the anti-glare component 40 and the light window 30, and without causing installation difficulties due to the anti-glare component 40 being inside the mounting cavity 12.

[0031] In one alternative implementation, such as Figure 2 , Figure 5 and Figure 8 As shown, the mounting hole 11 includes a first countersunk hole 111 and a second countersunk hole 112, the inner diameter of the second countersunk hole 112 being smaller than the inner diameter of the first countersunk hole 111. A metal film is formed at the connection between the light window 30 and the mirror mount 10. The metal film is welded to the first countersunk hole 111. The mounting part 13 is disposed in the second countersunk hole 112. The anti-glare component 40 covers at least a portion of the mounting part 13. This prevents excessive molten solder from flowing directly from the first countersunk hole 111 into the mounting cavity 12 during the high-temperature welding process between the light window 30 and the mirror mount 10, thus avoiding contamination of the anti-glare component 40 and the inner wall of the mounting cavity 12, which would affect the optical performance of the endoscope. In addition, this application can also form an annular overflow groove with the upper end face of the second countersunk hole 112 and the anti-glare component 40 fixed in the mounting part 13, which can increase the storage of solder and prevent the solder in the annular overflow groove from flowing from the anti-glare component 40 into the second countersunk hole 112 and the mounting cavity 12, greatly improving the welding quality of the light window 30 and the mirror base 10.

[0032] In one alternative implementation, such as Figures 3 to 6 As shown, the ratio of the thickness of the light window 30 to the axial length of the mounting part 13 along the mirror mount 10 is between 0.1 and 10. The anti-glare component 40 covers the mounting part 13 to ensure that the anti-glare component 40 can absorb the light passing through the light window 30 and scattered on the mounting part 13, so that the light passing through the light window 30 will not cause the mounting part 13 to generate reflected light, thereby achieving the anti-glare effect and improving the imaging quality of the endoscope.

[0033] In an optional embodiment, the ratio of the outer diameter of the light window 30 to the outer diameter of the anti-glare component 40 is no greater than 2, so that the light passing through the light window 30 and scattered on the side wall of the second countersunk hole 112 or the mounting cavity 12 can be absorbed by the anti-glare component 40, while also preventing the imaging beam passing through the lens assembly 50 from being blocked by the anti-glare component 40, thus affecting the imaging quality of the endoscope.

[0034] In an optional embodiment, the anti-glare component 40 includes a black metal ring, and the mounting portion 13 is formed by at least a portion of the inner wall of the second countersunk hole 112. The black metal ring is fixedly connected to the inner wall of the second countersunk hole 112 to ensure that the anti-glare component 40 is not affected by the welding temperature of the light window 30 and the lens mount 10, thereby better adapting to the welding environment of the light window 30 and the lens mount 10, which helps to improve the stability of welding quality and can also prevent the anti-glare component 40 from shifting during the welding process of the light window 30 and the lens mount 10.

[0035] After adopting the above technical solution, since the welding temperature of the light window 30 and the mirror base 10 is in the range of 300 to 400°C, this application sets the black metal ring as the anti-glare component 40. This not only adapts to the welding temperature of the light window 30 and the mirror base 10, effectively solving the stability of the anti-glare component 40 during the welding of the light window 30 and the mirror base 10, and ensuring the stability and high quality of the welding process, but also facilitates the fixed installation of the anti-glare component 40. It can accurately fix the anti-glare component 40 on the installation position 13 of the second countersunk hole 112 and the mounting cavity 12, covering the reflective parts inside the endoscope that are prone to reflection. This is used to limit the reflected light that is scattered on the inner wall of the second countersunk hole 112 and the mounting cavity 12 after passing through the light window 30, thereby achieving the anti-glare effect and improving the imaging quality of the endoscope.

[0036] In an alternative embodiment, the black metal ring is laser-welded to the inner wall of the second countersunk hole 112 to ensure the strong connection between the black metal ring and the endoscope mount 10, and the welding position is flatter and will not affect the imaging quality of the endoscope.

[0037] In one optional embodiment, to ensure the stability of laser welding, the wall thickness of the ferrous metal ring is not less than 0.05 mm to ensure the quality of the welded ferrous metal ring. Of course, in order to facilitate the welding of the optical window 30 and the mirror mount 10, the optical window 30 can press the ferrous metal ring so that the ferrous metal ring can abut against the surface of the optical window 30, and the wall thickness of the ferrous metal ring can also be slightly less than 0.05 mm. This application does not impose any limitations.

[0038] In an optional embodiment, at least a portion of the black metal ring protrudes from the second countersunk hole 112 toward one side of the first countersunk hole 111, and the optical window 30 abuts against the black metal ring to ensure that the black metal ring can always maintain contact with the optical window 30 when the optical window 30 is welded to the lens mount 10. This reduces the positioning difficulty of the black metal ring during installation, increases the installation efficiency of the black metal ring, and also ensures that the black metal ring can contact the optical window 30 after welding.

[0039] In an alternative embodiment, the black metal ring is fixed to the inner wall of the second countersunk hole 112 with glue, which is convenient to operate and highly practical.

[0040] In an optional embodiment, the anti-glare component 40 includes a black coating. The mounting portion 13 is formed by at least a portion of the inner wall of the second countersunk hole 112. The black coating is applied to the outer side of the mounting portion 13 to solve the problem of reflected light generated by the inner wall of the second countersunk hole 112 and / or the mounting cavity 12, and to prevent the endoscope from causing stray light problems such as glare and ghosting due to reflected light.

[0041] In one optional embodiment, the black coating can withstand a temperature of not less than 300°C to prevent the black coating from being affected by the welding temperature of the light window 30 and the lens mount 10. At the same time, it can also ensure that the black coating will not undergo a chemical reaction at this temperature, thus better ensuring the overall quality of the endoscope during the welding process.

[0042] In one alternative implementation, such as Figure 3 , Figure 6 and Figure 7 As shown, the mounting hole 11 includes a first mounting hole 11a and a second mounting hole 12a, and the anti-glare component 40 is disposed in the second countersunk hole 112 of the first mounting hole 11a and the second mounting hole 12a. The first mounting hole 11a and the second mounting hole 12a are symmetrically arranged about the central axis of the mirror base 10. In an optional embodiment, the light window 30 includes a sapphire lens, which is fixed to the first countersunk hole 111 of the first mounting hole 11a and the second mounting hole 12a by brazing. This not only ensures that the sapphire lens is firmly fixed to the first mounting hole 11a and the second mounting hole 12a, guaranteeing the sealing performance after the sapphire lens is connected to the endoscope base 10, but also ensures that the weld between the sapphire lens and the endoscope base 10 can maintain high strength and is not prone to oxidation and corrosion during subsequent repeated high-temperature and high-pressure sterilization of the endoscope. The brazing is done with a gold-tin alloy solder, which does not contain harmful lead, reducing harm to human health. The sapphire lens has high hardness, and its end face is not easily scratched, exhibiting good wear resistance and thus a long service life.

[0043] In an optional embodiment, the thickness of the light window 30 is not greater than the depth of the first countersunk hole 111, which can prevent damage to the end face of the light window 30 during later use and storage, thereby effectively protecting the outer surface of the light window 30.

[0044] For example, the end face of the light window 30 is about 1-2 mm lower than the end face of the mirror mount 10, but this is not specifically limited here.

[0045] In one alternative implementation, such as Figure 1 , Figure 3 and Figure 4 As shown, the lens assembly 50 includes a first lens group and a second lens group. The first lens group and the second lens group are arranged sequentially from the light window 30 to the chip module 200 along the optical axis of the endoscope. The first lens group is used to generate a real image of the target being detected. It has negative optical power and can effectively couple light from a large field of view into the objective lens module, thereby increasing the field of view of the objective lens module and shortening the total optical length of the objective lens module. The second lens group has positive optical power, which helps to reduce the incident angle of light on the surface of the second lens group, further compressing the principal ray angle, while also correcting aberrations. It can also be matched with an image sensor with a large principal ray angle, thereby improving the imaging quality.

[0046] In an optional embodiment, the first lens group includes a negative lens 51 and a steering mirror 52 for optical path deflection. The negative lens 51, the steering mirror 52, and the second lens group are arranged sequentially from the optical window 30 to the chip module 200 along the optical axis of the endoscope. The negative lens 51 can obtain the wide viewing angle required by the endoscope and ensure the back focus. It is mainly to reduce the projection angle of the incident light with a high field of view to the steering mirror 52, thereby achieving a large field of view. The steering mirror 52 is used to change the viewing angle of the objective lens module so that targets not in the field of view directly in front of the lens can be observed by deflecting the optical axis, thereby improving the observation range. Combined with the second lens group with positive optical power, it is beneficial to correct magnification chromatic aberration and suppress the increase in the total length of the objective lens module, thereby reducing the size of the objective lens module.

[0047] In an optional embodiment, the steering mirror 52 includes a steering prism with a high-reflectivity coating on its bottom surface to increase the reflectivity of light incident at small angles and improve light energy utilization. The prism is made of a high-refractive-index material to reduce the critical angle of total internal reflection, causing more optical fibers to reflect. The bottom surface is coated with a high-reflectivity film, and the light-transmitting surface is coated with a high-transmittance film, increasing the amount of light transmitted.

[0048] In an optional embodiment, the second lens group includes a plano-convex lens 53 and a plane lens 54, the plano-convex lens 53 being disposed on the side near the steering prism, and the convex surface of the plane lens 54 facing the plane lens 54.

[0049] In an optional embodiment, the second lens group includes a meniscus lens 55 and a biconvex lens 56, which are sequentially arranged along the optical axis from the optical window 30 to the chip module 200. The negative lens 51, the steering prism, the plano-convex lens 53, the plane lens 54, the meniscus lens 55, and the biconvex lens 56 are all separated by air gaps, making the entire lens assembly 50 more compact and meeting the requirements for a large field of view, miniaturization, and low cost for endoscope lenses.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. 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, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An endoscope, characterized by, It includes an optical module and a chip module, wherein the chip module receives the imaging beam acquired by the endoscope through the optical module and generates an image signal; The optical module includes a lens mount, a light window, and an anti-glare component. The lens mount has a mounting hole and a mounting cavity communicating with the mounting hole. The light window is welded into the mounting hole. At least one of the mounting hole and the mounting cavity has a mounting portion. The anti-glare component is disposed on the mounting portion. One end of the anti-glare component contacts the light window, and the other end of the anti-glare component extends toward the side away from the mounting hole to absorb reflected light illuminating the mounting portion.

2. The endoscope of claim 1, wherein, The mounting hole includes a first countersunk hole and a second countersunk hole with an inner diameter smaller than the first countersunk hole. A metal film is formed at the part where the light window is connected to the mirror base. The metal film is welded to the first countersunk hole. The mounting part is disposed in the second countersunk hole. The anti-glare component covers at least part of the mounting part.

3. The endoscope of claim 2, wherein, The ratio of the thickness of the light window to the axial length of the mounting part along the mirror mount is between 0.1 and 10.

4. The endoscope of claim 2, wherein, The ratio of the outer diameter of the light window to the outer diameter of the anti-glare component is no greater than 2.

5. The endoscope of any one of claims 2 to 4, wherein, The anti-glare component includes a black metal ring, and the mounting portion is formed by at least a portion of the inner wall of the second countersunk hole, wherein the black metal ring is fixedly connected to the inner wall of the second countersunk hole.

6. The endoscope of claim 5, wherein, The black metal ring is laser-welded to the inner wall of the second countersunk hole; or, the black metal ring is fixed to the inner wall of the second countersunk hole with glue.

7. The endoscope of claim 5, wherein, At least a portion of the black metal ring protrudes from the second countersunk hole toward one side of the first countersunk hole, and the light window abuts against the black metal ring.

8. The endoscope of any one of claims 2 to 4, wherein, The anti-glare component includes a black coating, and the mounting portion is formed by at least a portion of the inner wall of the second countersunk hole, with the black coating applied to the outer side of the mounting portion.

9. The endoscope according to claim 8, characterized in that, The black coating can withstand temperatures of not less than 300°C.

10. The endoscope according to any one of claims 2 to 4, characterized in that, The mounting holes include a first mounting hole and a second mounting hole, and the anti-glare component is disposed in the second countersunk hole of the first mounting hole and the second mounting hole.

11. The endoscope according to claim 10, characterized in that, The light window includes a sapphire lens, which is fixed in the first countersunk hole of the first mounting hole and the second mounting hole by brazing.

12. The endoscope according to any one of claims 2 to 4, characterized in that, The thickness of the light window is no greater than the depth of the first countersunk hole.

Images