Insertion section of magnifying endoscope, magnifying endoscope, and endoscope system

Abstract

The application is suitable for the technical field of medical devices, and provides an insertion part of a magnifying endoscope, the magnifying endoscope and an endoscope system. The insertion part comprises multiple optical illumination assemblies. Each optical illumination assembly comprises a lens barrel, a light guide arranged at least partially in the lens barrel, and an illumination lens arranged in the lens barrel and located on the light exit side of the light guide. In at least one optical illumination assembly, there is an air gap between the light entrance side of the illumination lens and the light exit side of the light guide. The length of the air gap is d, the outer diameter of the illumination lens is X, and X / 2≤d≤X. The light guide is prevented from being imaged on the light entrance surface of the illumination lens. At a position 2-5 mm away from the light exit end of the optical illumination assembly, the number of fiber filaments observed in the light guide is not more than 0.5% of the total number of fiber filaments. In the near scene illumination scenario, the light exit uniformity of the illumination lens is obviously improved. Without using complex optical components such as a light homogenizing rod, the volume of the insertion part is miniaturized.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an insertion part of a magnifying endoscope, a magnifying endoscope, and an endoscope system. Background Technology

[0002] A magnifying endoscope is an endoscope that can magnify physiological tissues, allowing for stepless focusing within the body to observe lesions both close-up and at a distance. When performing magnified observation of physiological tissues, the magnifying endoscope generally needs to be placed close to the tissue to achieve better magnification. Specifically, the working distance for close-up magnification is generally 2 to 3 millimeters, with a few cases reaching 3 to 5 millimeters, while the working distance for distance observation is 5 to 100 millimeters. However, traditional magnifying endoscopes typically use a single illumination optical structure, which cannot effectively address the illumination needs of both close-up and distance observations. This means that during close-up observation, the layout of the illumination optical system affects the observation effect, especially when the distance to the subject is less than 2 millimeters, with the peripheral areas being brighter than the center of the image, failing to provide sufficient illumination for the subject to be positioned in the center.

[0003] Meanwhile, in magnifying endoscopes, the optical illumination assembly typically includes a light guide (usually an optical fiber), an illumination lens group, and a tube. The illumination lens group, placed inside the tube, diffuses the light emitted from the optical fiber. The focal point of the illumination lens group is usually located at the end face of one of the lenses. When the end face of the optical fiber is close to the illumination lens group, it causes the fiber filament to be imaged on the illumination surface, affecting the illumination effect. Adding a light-diffusing rod can alleviate the fiber filament imaging problem to some extent, but the light-diffusing rod requires high precision and has a complex manufacturing process, increasing manufacturing difficulty and cost, and also hindering the miniaturization of magnifying endoscopes to some extent.

[0004] Therefore, how to provide good illumination in magnifying endoscopes, especially under close-up illumination, while ensuring the miniaturization of the magnifying endoscope, has become a pressing technical problem that needs to be solved. Summary of the Invention

[0005] The purpose of this application is to provide an insertion part for a magnifying endoscope, aiming to provide a solution that balances the illumination effect of the magnifying endoscope with its miniaturization.

[0006] This application provides an insertion part for a magnifying endoscope. The insertion part includes multiple optical illumination components. Each optical illumination component includes a lens barrel, a light guide at least partially disposed within the lens barrel, and an illumination lens disposed within the lens barrel and located on the light-emitting side of the light guide. In at least one of the optical illumination components, there is an air gap between the light-incident side of the illumination lens and the light-emitting side of the light guide. The length of the air gap is d, and the outer diameter of the illumination lens is X, where X / 2 ≤ d ≤ X.

[0007] In some embodiments, the insertion portion further includes an imaging component; the plurality of optical illumination components include a first optical illumination component, a second optical illumination component, and a third optical illumination component; the first optical illumination component and the second optical illumination component are disposed close to the imaging component, and the third optical illumination component is disposed away from the imaging component.

[0008] In some embodiments, both the first optical illumination component and the second optical illumination component satisfy the following conditions: there is an air gap between the light-incident side of the illumination lens and the light-outceasing side of the light guide, the length of the air gap is d, the outer diameter of the illumination lens is X, and X / 2≤d≤X.

[0009] In some embodiments, the third optical illumination component satisfies the following conditions: there is an air gap between the light-incident side of the illumination lens and the light-outceasing side of the light guide, the length of the air gap is d, the outer diameter of the illumination lens is X, and X / 2≤d≤X.

[0010] In some embodiments, the line connecting the center point of the first optical illumination component and the center point of the imaging component is designated as the first line, and the line connecting the center point of the second optical illumination component and the center point of the imaging component is designated as the second line. The divergence angles of the first and second optical illumination components are greater than or equal to 90° and less than or equal to 130°; on the side where the third optical illumination component is located, the included angle between the first and second connecting lines is greater than or equal to 120° and less than or equal to 180°.

[0011] In some embodiments, the distance between the first optical illumination component and the imaging component is less than or equal to 3 mm; the distance between the second optical illumination component and the imaging component is less than or equal to 3 mm.

[0012] In some embodiments, the divergence angle of the third optical illumination component is smaller than that of the first optical illumination component, and the divergence angle of the third optical illumination component is smaller than that of the second optical illumination component.

[0013] In some embodiments, the light-emitting area of ​​the third optical illumination component is greater than that of the first optical illumination component, and the light-emitting area of ​​the third optical illumination component is greater than that of the second optical illumination component.

[0014] In some embodiments, the diameter of the first optical illumination component is 0.8 mm to 1.2 mm; the diameter of the second optical illumination component is 0.8 mm to 1.2 mm; and the diameter of the third optical illumination component is 1.7 mm to 2.3 mm.

[0015] In some embodiments, the line connecting the center point of the first optical illumination component and the center point of the second optical illumination component is designated as the fourth line; the distance between the third optical illumination component and the fourth line is less than or equal to 3 mm; and the divergence angle of the third optical illumination component is greater than or equal to 80° and less than or equal to 100°.

[0016] In some embodiments, the insertion portion has a clamping orifice; the line connecting the center point of the first optical illumination component and the center point of the imaging component is designated as the first line, the line connecting the center point of the second optical illumination component and the center point of the imaging component is designated as the second line, and the center point of the third optical illumination component and the clamping orifice are located on opposite sides of the angle bisector between the first line and the second line.

[0017] In some embodiments, a limiting portion is provided on the outer peripheral surface of the light guide, the limiting portion being located outside the lens barrel and abutting against the end face of the lens barrel.

[0018] Another objective of this application is to provide a magnifying endoscope, including a connecting part, an operating part, and an insertion part as described in the above embodiments.

[0019] Another object of the embodiments of this application is to provide an endoscope system, including an image processing device, a light source device, and a magnifying endoscope as described in the above embodiments.

[0020] The beneficial effects of the magnifying endoscope insertion part, magnifying endoscope, and endoscope system provided in this application embodiment are as follows: The insertion part of the magnifying endoscope provided in this application embodiment forms an air gap between the illumination lens and the light guide on their adjacent sides. The length of the air gap is greater than or equal to half the outer diameter of the illumination lens and less than or equal to the outer diameter of the illumination lens. This avoids the problem of the light guide forming an image on the light-incident surface of the illumination lens. At a distance of 2 mm to 5 mm from the light-emitting end of the optical illumination component, the number of observed fiber filaments does not exceed 0.5% of the total number of fiber filaments in the light guide. In close-range illumination scenarios, this significantly improves the uniformity of light output from the illumination lens and enhances the illumination effect. It eliminates the need for complex optical components such as light-diffusing rods, thereby reducing the production and assembly costs of the insertion part and facilitating the miniaturization of the insertion part. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the magnifying endoscope provided in the embodiments of this application; Figure 2 This is a schematic diagram of the end face structure of the insertion part of the magnifying endoscope provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of an optical illumination assembly in the insertion part of a magnifying endoscope provided in an embodiment of this application; Figure 4 This is another structural schematic diagram of the optical illumination assembly in the insertion part of the magnifying endoscope provided in the embodiments of this application; Figure 5 This is a schematic diagram of the end face structure of the light guide in the insertion part of the magnifying endoscope provided in the embodiments of this application; Figure 6 This is a schematic diagram of the light field distribution of the insertion part of the magnifying endoscope provided in this application embodiment under near-field illumination; Figure 7 This is a schematic diagram of the insertion part of a magnifying endoscope provided in an embodiment of this application; Figure 8 This is another schematic diagram of the insertion part of the magnifying endoscope provided in the embodiments of this application; Figure 9 This is another structural schematic diagram of the insertion part of the magnifying endoscope provided in the embodiments of this application; Figure 10 This is another schematic diagram of the insertion part of the magnifying endoscope provided in the embodiments of this application; Figure 11 This is another structural schematic diagram of the insertion part of the magnifying endoscope provided in the embodiments of this application; Figure 12 This is a schematic diagram showing the divergence angle of the optical illumination component in the insertion section of the magnifying endoscope provided in this application embodiment.

[0023] The markings in the diagram mean: 200 - Magnifying endoscope, 91 - Connecting part, 92 - Operating part; 100 - Insertion section; 10 - Optical illumination assembly, 11 - First optical illumination assembly, 12 - Second optical illumination assembly, 13 - Third optical illumination assembly; 101-lens tube, 102-light guide, 1020-fiber optic cable, 1021-limiting part, 103-air gap, 104-illumination lens, 1041-lens; 109 - Camera element; 20 - Imaging components; 30-Pliers opening; 40 - Rinse port. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly fixed to or set on that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of 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, and therefore should not be construed as a limitation of this patent. The terms "first" and "second" are used only for the purpose of description and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly specified.

[0026] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be single or multiple. Furthermore, in the description of this application, "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single items or multiple items. For example, at least one of a, b, and c can be represented as: a, b, c, a+b, a+c, b+c, a+b+c, where a, b, and c can be single or multiple. As another example, at least one of a, b, or c can be represented as: a, b, c, a+b, a+c, b+c, a+b+c, where a, b, and c can be single or multiple.

[0027] To illustrate the technical solutions described in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0028] This application first provides an endoscope system, which includes a light source device (not shown), and, as... Figure 1 As shown, it also includes a magnifying endoscope 200 connected to a light source device. The light source device generates a light beam of a specific wavelength, which enters the magnifying endoscope 200 from one end and exits from the other end, serving as an illumination beam provided by the magnifying endoscope 200. For example, when performing a gastrointestinal examination using the magnifying endoscope 200, the illumination beam exiting from the other end of the magnifying endoscope 200 will illuminate the observed gastrointestinal region, achieving effective illumination of the gastrointestinal tissues. Furthermore, the magnifying endoscope 200 is also used to acquire images of the illuminated region.

[0029] In some embodiments, the endoscope system further includes an image processing device (not shown) capable of receiving and processing images acquired by the magnifying endoscope 200. For example, in some alternative embodiments, the image processing device may perform image enhancement processing, physiological site identification, etc.

[0030] In some embodiments, the endoscope system also includes a display device (not shown), to which an image processing device sends image processing results.

[0031] like Figure 1As shown, the magnifying endoscope 200 provided in this embodiment includes a connecting portion 91 and an insertion portion 100 connected together. The connecting portion 91 is used to connect to the aforementioned light source device to transmit light from the light source device to the insertion portion 100. The insertion portion 100 is used for insertion into a patient's body.

[0032] like Figure 1 As shown, in some embodiments, the magnifying endoscope 200 further includes an operation section 92 connected between the connection section 91 and the insertion section 100. The operation section 92 includes a plurality of control knobs or buttons to control the related movements of the insertion section 100.

[0033] like Figure 2 As shown, the insertion portion 100 of the magnifying endoscope 200 provided in this embodiment includes a plurality of optical illumination components 10. Viewed from the end face of the insertion portion 100, the plurality of optical illumination components 10 are spaced apart. The end face of the insertion portion 100 is generally circular or circular, and the end faces of the optical illumination components 10 are generally circular or circular. The overall external dimensions of the insertion portion 100 are relatively small, and both the end faces of the insertion portion 100 and the optical illumination components 10 can be considered circular.

[0034] like Figure 3 and Figure 4 As shown, in the embodiments of this application, each optical illumination assembly 10 includes a lens barrel 101, a light guide 102 at least partially disposed within the lens barrel 101, and an illumination lens 104 disposed within the lens barrel 101 and located on the light-emitting side of the light guide 102. In at least one optical illumination assembly 10, an air gap 103 is provided between the light-incident side of the illumination lens 104 and the light-emitting side of the light guide 102.

[0035] By forming an air gap 103 between the sides of the illumination lens 104 and the light guide 102 that are close to each other, the problem of the light guide 102 forming an image on the light incident surface of the illumination lens 104 can be avoided, the uniformity of light output of the illumination lens 104 can be improved, and the illumination effect can be improved. There is no need to use complex optical components such as light diffusing rods, which can reduce the production cost and assembly cost of the insertion part 100, and is conducive to the miniaturization of the insertion part 100.

[0036] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, the length of the air gap 103 is d, and the outer diameter of the illumination lens 104 is X, where X / 2 ≤ d ≤ X. It has been verified that within this range, the imaging of the light guide 102 on the end face of the illumination lens 104 can be effectively reduced, while the impact on the overall size (length) of the insertion part 100 is minimal.

[0037] like Figure 5As shown, in some embodiments of this application, the light guide 102 includes a plurality of optical fiber filaments 1020, which are arranged in parallel and emit light independently. The end faces of the optical fiber filaments 1020 are generally circular and can be considered as circular. Specifically, when X / 2≤d≤X, at a distance L from the light-emitting end of the optical illumination assembly 10, the number of observed optical fiber filaments 1020 does not exceed 0.5% of the total number of optical fiber filaments 1020 in the light guide 102, where L is 2 mm to 5 mm. Within this range, the brightness uniformity during near-field illumination can be significantly improved. At the same time, the brightness uniformity during far-field illumination is also correspondingly improved.

[0038] In some alternative embodiments, X / 2 < d < X. In some alternative embodiments, d can specifically be 0.5X, 0.6X, 0.7X, 0.8X, 0.9X, X, etc.

[0039] like Figure 3 and Figure 4 As shown, assuming there is an image sensor 109 at a distance L from the light-emitting surface of the light guide 102, the image sensor 109 captures an image of the light-emitting end of the optical illumination assembly 10. Because multiple fiber optic strands 1020 emit and diffuse light independently, the captured image exhibits a certain degree of brightness uniformity. For example... Figure 6 As shown, an image is captured at a distance L from the light-emitting end of the optical illumination component 10. In the obtained image, the number of observable fiber optic filaments 1020 does not exceed 0.5% of the total number of fiber optic filaments 1020 in the light guide 102. That is, within each light guide 102, only no more than 0.5% of the fiber optic filaments 1020 have a different brightness than the other fiber optic filaments 1020 and are thus clearly identifiable. Processing the captured image to identify the number of fiber optic filaments 1020 with different brightness can be implemented using existing technology and will not be elaborated further.

[0040] The form of the illumination lens 104 is not limited. The illumination lens 104 may include a single lens 1041, such as... Figure 4 As shown, it can also include a lens group composed of multiple lenses 1041, such as Figure 3 As shown.

[0041] For example, Figure 3 As shown, the illumination lens 104 may include two plano-convex lenses with their convex surfaces abutting each other. The air gap 103 is located between the plane of the plano-convex lens near the light guide 102 and the end face of the light guide 102. The air gap 103 is generally in the shape of a disk with a uniform thickness.

[0042] For example, Figure 4As shown, the illumination lens 104 may include a concave lens, with its concave surface located on the side closest to the light guide 102. An air gap 103 is located between the concave surface of the lens and the end face of the light guide 102. The air gap 103 is generally convex in shape. In further embodiments, the illumination lens 104 may have other lens combinations, and correspondingly, the air gap 103 may also have other forms.

[0043] The light-emitting end face of the light guide 102 can be planar.

[0044] It should be noted that for air gaps 103 of different shapes, their dimensions along the light path can be equal or unequal at different positions. Here, the length d of the air gap 103 refers to the minimum value of its dimensions along the light path at different positions, that is, the minimum value of the distance between the light-incident side of the illumination lens 104 and the light-exit side of the light guide 102 at different positions.

[0045] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, a limiting part 1021 is provided on the outer peripheral surface of the light guide 102. The limiting part 1021 is located outside the lens barrel 101 and abuts against the end face of the lens barrel 101.

[0046] The limiting part 1021 restricts the length of the light guide 102 inserted into the lens barrel 101, thereby creating a predetermined air gap 103 between the light guide 102 and the illumination lens 104. The form of the limiting part 1021 is not limited; for example, it can be a protrusion integrally formed or welded to the outer surface of the light guide 102, or other available forms, as long as its dimensions are designed to prevent it from entering the lens barrel 101.

[0047] An illumination beam emitted from the light-emitting end of multiple optical illumination components 10 reaches the surface of the human tissue to be inspected, and is used to illuminate the surface of the human tissue.

[0048] In some embodiments of this application, such as Figure 2 As shown, the insertion unit 100 also includes an imaging component 20. The imaging component 20 is used to acquire images of the surface of the irradiated human tissue.

[0049] like Figure 2 As shown, in some embodiments of this application, the plurality of optical illumination components 10 includes a first optical illumination component 11, a second optical illumination component 12, and a third optical illumination component 13; as Figure 7 and Figure 8 As shown, in some embodiments of this application, the first optical illumination component 11 and the second optical illumination component 12 are disposed close to the imaging component 20, and the third optical illumination component 13 is disposed away from the imaging component 20.

[0050] Viewed from the end face of the insertion portion 100, the imaging component 20 has a certain area (which may refer to the area used for receiving light). The first optical illumination component 11, the second optical illumination component 12, and the third optical illumination component 13 each have a certain light-emitting area. In this application, the distance between each optical illumination component 10 and the imaging component 20 is considered only as the length of the portion outside the optical illumination component 10 and the imaging component 20 on the line connecting the center point of the optical illumination component 10 and the center point of the imaging component 20. That is, the distance between each optical illumination component 10 and the imaging component 20 is calculated between the edges of the optical illumination component 10 and the imaging component 20 that are close to each other.

[0051] like Figure 7 and Figure 8 As shown, in some embodiments of this application, it is assumed that the center point of the imaging component 20 is A, the center point of the first optical illumination component 11 is B, the center point of the second optical illumination component 12 is C, and the center point of the third optical illumination component 13 is D. The line connecting the center point B of the first optical illumination component 11 and the center point A of the imaging component 20 is the first line BA, the line connecting the center point C of the second optical illumination component 12 and the center point A of the imaging component 20 is the second line CA, and the line connecting the center point D of the third optical illumination component 13 and the center point A of the imaging component 20 is the third line DA.

[0052] The distance from the first optical illumination component 11 to the imaging component 20 is the length of the portion of the first line BA located outside the first optical illumination component 11 and the imaging component 20. The distance from the second optical illumination component 12 to the imaging component 20 is the length of the portion of the second line CA located outside the second optical illumination component 12 and the imaging component 20. The distance from the third optical illumination component 13 to the imaging component 20 is the length of the portion of the third line DA located outside the third optical illumination component 13 and the imaging component 20.

[0053] The first optical illumination component 11 and the second optical illumination component 12 are positioned close to the imaging component 20 and are primarily used to illuminate the wall surface of human tissue during close-up imaging. During close-up illumination, the illumination range of the first optical illumination component 11 and the second optical illumination component 12 is relatively small, but the illuminance per unit area is relatively high, and the illumination range is concentrated near the imaging component 20. Therefore, the wall surface of human tissue in a small target area can be effectively illuminated, solving the problem of insufficient brightness at the center of the image during close-up illumination.

[0054] As the viewing distance increases, the illumination range of the first optical illumination component 11, the second optical illumination component 12, and the third optical illumination component 13 also increases. For distant viewing, the third optical illumination component 13 primarily provides illumination. The first optical illumination component 11 and the second optical illumination component 12 also provide some auxiliary illumination. A relatively uniform illuminance is provided across the entire field of view for distant viewing.

[0055] Thus, by arranging multiple optical lighting components 10, the illuminance requirements for both distant and near-field lighting, as well as the requirement for illuminance uniformity, can be met.

[0056] In some embodiments of this application, the first optical illumination component 11 and the second optical illumination component 12 both satisfy the following: there is an air gap 103 between the light-incident side of the illumination lens 104 and the light-outceasing side of the light guide 102, the length of the air gap 103 is d, the outer diameter of the illumination lens 104 is X, and X / 2≤d≤X.

[0057] In some embodiments of this application, the third optical illumination component 13 satisfies the following: there is an air gap 103 between the light-incident side of the illumination lens 104 and the light-outceasing side of the light guide 102, the length of the air gap 103 is d, the outer diameter of the illumination lens 104 is X, and X / 2≤d≤X.

[0058] In some optional embodiments, the divergence angle of the first optical illumination component 11 can be greater than or equal to 90° and less than or equal to 130°, for example, 120°, 130°, etc. The divergence angle of the second optical illumination component 12 can be greater than or equal to 90° and less than or equal to 130°, for example, 120°, 130°, etc.

[0059] The divergence angle is defined as the angle at which the light intensity of the optical illumination component 10 is half of the highest intensity at the center, when the illumination distance is 2.5 mm to 3 mm. For example... Figure 12 As shown, the light intensity of the optical illumination component 10 decreases sequentially from the center to the edge. When the light intensity (normalized light intensity) is 0.5, the corresponding angle can be used as the divergence angle of the corresponding optical illumination component 10.

[0060] like Figure 10 As shown, the third optical illumination component 13 avoids the first connection BA and the second connection CA, and the third optical illumination component 13 is located inside one of the two angles formed by the first connection BA and the second connection CA. In some embodiments of this application, such as Figure 10 As shown, on the side where the third optical illumination component 13 is set, the included angle α between the first line BA and the second line CA is greater than or equal to 120° and less than or equal to 180°.

[0061] The divergence angles of the first optical illumination component 11 and the second optical illumination component 12, as described above, can be greater than or equal to 90° and less than or equal to 130°. The purpose of this arrangement is to ensure that, during near-field illumination, the illumination range of the first optical illumination component 11 and the second optical illumination component 12 can cover the entire field of view of the imaging component 20 as much as possible, avoiding dark areas due to gaps between the illumination ranges of the first optical illumination component 11 and the second optical illumination component 12, and further improving the brightness uniformity of the center and edges within the field of view. In addition, the positional arrangement of the first optical illumination component 11, the second optical illumination component 12, and the third optical illumination component 13 ensures that both the near-field illumination range and the far-field illumination range can be kept in the central area of ​​the field of view, without excessive deviation between the illumination area and the field of view, thus avoiding uneven brightness or insufficient brightness within the field of view.

[0062] In some embodiments, when illuminated at close range, the brightness difference between the center and the edge of the field of view does not exceed 30%.

[0063] In some embodiments, on the side where the third optical illumination component 13 is located, the included angle α between the first connecting line BA and the second connecting line CA is greater than or equal to 120° and less than 180°. The purpose of this arrangement is that, while the first and second optical illumination components 11 and 12 are arranged at approximately equal distances on both sides of the imaging component 20, they are also positioned closer to the side where the third optical illumination component 13 is located. This ensures that, during distant illumination, the illumination range of each of the three optical illumination components 11, 12, and 13 is utilized as much as possible within the field of view of the imaging component 20, thereby improving the light utilization rate of each optical illumination component 10.

[0064] like Figure 7 As shown, in some embodiments, the distance from the first optical illumination component 11 to the imaging component 20 can be greater than 0. Alternatively, as... Figure 8 As shown, in some embodiments, the distance between the first optical illumination component 11 and the imaging component 20 can be equal to 0. Optionally, the distance between the first optical illumination component 11 and the imaging component 20 can be less than or equal to 3 mm.

[0065] like Figure 7 As shown, in some embodiments, the distance between the second optical illumination component 12 and the imaging component 20 can be greater than 0. Alternatively, as... Figure 8 As shown, in some embodiments, the distance between the second optical illumination component 12 and the imaging component 20 can be equal to 0. Optionally, the distance between the second optical illumination component 12 and the imaging component 20 can be less than or equal to 3 mm.

[0066] The purpose of this arrangement is to ensure that, with the distance between the first optical illumination component 11 and the imaging component 20 not exceeding 3 mm, and the distance between the second optical illumination component 12 and the imaging component 20 not exceeding 3 mm, and considering the divergence angles of the first and second optical illumination components 11 and 12, a uniformly bright illumination range can be formed during near-field illumination. Furthermore, by considering the relative positional relationship between the first, second, and third optical illumination components 13, the influence of the third optical illumination component 13 on near-field illumination can be reduced or even avoided.

[0067] In some embodiments, the distance from the second optical illumination component 12 to the imaging component 20 may be equal to the distance from the first optical illumination component 11 to the imaging component 20.

[0068] In some embodiments of this application, such as Figure 7 and Figure 8 As shown, the light-emitting area of ​​the third optical illumination component 13 is larger than that of the first optical illumination component 11, and the light-emitting area of ​​the third optical illumination component 13 is larger than that of the second optical illumination component 12. This is beneficial for providing sufficient illuminance within the field of view during distant illumination, and for ensuring that the average illuminance within the field of view is similar during both near-field and distant illumination, thus avoiding significant changes in average illuminance within the field of view when switching between distant and near-field observation.

[0069] Furthermore, by combining the divergence angle of the first optical illumination component 11 and the divergence angle of the second optical illumination component 12, as well as the relative positional relationship between the first optical illumination component 11, the second optical illumination component 12 and the third optical illumination component 13, a suitable illuminance can be provided within the field of view during close-up illumination, and the light from the third optical illumination component 13 will not affect the close-up illumination effect.

[0070] In some alternative embodiments, the size (diameter) of the first optical illumination component 11 can be 1 mm ± 0.2 mm, for example, 1 mm. The size (diameter) of the second optical illumination component 12 can be 1 mm, for example, 1 mm. The size (diameter) of the third optical illumination component 13 can be 2 mm ± 0.3 mm, for example, 2 mm.

[0071] In some embodiments, the light-emitting area of ​​the second optical illumination component 12 may be approximately equal to the light-emitting area of ​​the first optical illumination component 11. This "approaching equal" can include the light-emitting area of ​​the second optical illumination component 12 being equal to the light-emitting area of ​​the first optical illumination component 11, or it can include cases where the light-emitting areas of the first optical illumination component 11 and the second optical illumination component 12 are different, but the ratio of their light-emitting areas is within the range of 0.9 to 1.1.

[0072] With the above settings, the first optical illumination component 11 and the second optical illumination component 12 can provide approximately equal illumination areas and approximately the same illuminance at the same positions on both sides of the imaging component 20.

[0073] In some embodiments of this application, such as Figure 12 As shown, the divergence angle of the third optical illumination component 13 is smaller than that of the first optical illumination component 11, and the divergence angle of the third optical illumination component 13 is smaller than that of the second optical illumination component 12. Therefore, the larger divergence angles of the first and second optical illumination components 11 and 12 are beneficial for ensuring relatively uniform illuminance per unit area during near-field illumination, while the smaller divergence angle of the third optical illumination component 13 is beneficial for ensuring a suitable illumination range during far-field illumination. Furthermore, considering the relative positions of the first, second, and third optical illumination components 11 and 12, the beam of the third optical illumination component 13 can minimize its entry into the field of view during near-field illumination, reducing the impact of its light emission on illuminance uniformity.

[0074] In some embodiments of this application, the divergence angles of the first optical illumination component 11 and the second optical illumination component 12 may be approximately equal. This "approaching equality" can include the divergence angle of the second optical illumination component 12 being equal to the divergence angle of the first optical illumination component 11, or it can include cases where the divergence angles of the first optical illumination component 11 and the second optical illumination component 12 are different, but their ratio is within the range of 0.9 to 1.1.

[0075] In some embodiments, the first optical illumination component 11 and the second optical illumination component 12 can be optical illumination components 10 with identical structures. This includes having the same light-emitting area, the same divergence angle, and the same power, etc. The first optical illumination component 11 and the second optical illumination component 12 can provide the same illumination effect at the same positions on both sides of the imaging component 20, further improving the uniformity of illumination during near-field and far-field illumination.

[0076] Furthermore, by combining the divergence angle of the first optical illumination component 11, the divergence angle of the second optical illumination component 12, and the relative positional relationship between the first optical illumination component 11, the second optical illumination component 12, and the third optical illumination component 13, uniform illuminance can be provided within the field of view during close-up illumination, and the light from the third optical illumination component 13 will not affect the close-up illumination effect.

[0077] In some embodiments, the divergence angle of the third optical illumination component 13 can be greater than or equal to 80° and less than or equal to 100°, such as 90°.

[0078] like Figure 9 and Figure 10 As shown, it is assumed that the line connecting the center point B of the first optical illumination component 11 and the center point C of the second optical illumination component 12 is the fourth line BC. In some embodiments of this application, such as Figure 9 As shown, the distance between the third optical illumination component 13 and the fourth connecting line BC is less than or equal to 3 millimeters. Figure 9 As shown, a perpendicular line is drawn from the center point D of the third optical illumination component 13 to the fourth line BC, resulting in the perpendicular line segment DF. The distance between the third optical illumination component 13 and the fourth line BC refers to the length of the portion of the perpendicular line segment DF located outside the third optical illumination component 13.

[0079] The purpose of this configuration is that, when the distance between the third optical illumination component 13 and the fourth connecting line BC is less than or equal to 3 mm, combined with the aforementioned divergence angle of the third optical illumination component 13 being greater than or equal to 80° and less than or equal to 100°, a uniform illumination range can be formed during distant illumination. At the same time, during close-up illumination, the light from the third optical illumination component 13 can be kept away from entering the field of view as much as possible, further ensuring the uniformity of brightness in close-up illumination.

[0080] In some embodiments of this application, such as Figure 2 As shown, the insertion part 100 also has a clamping port 30, which is used for inserting end instruments (such as clamps) into the human body to perform operations such as sampling and treatment on the human tissue wall.

[0081] In some embodiments of this application, such as Figure 2 As shown, the insertion part 100 also has a rinsing port 40, which serves as a liquid inlet and outlet for rinsing and cleaning the walls of human tissues or for aspirating bodily fluids from the human body.

[0082] In some embodiments of this application, such as Figure 7 and Figure 8As shown, the clamping port 30 and the flushing port 40 are located on opposite sides of the third line DA. This makes the relative positions of the components of the insertion part 100 reasonable, and the entry and exit paths of the end instrument and the liquid are spaced as far apart as possible and do not interfere with each other. At the same time, the first optical illumination component 11, the second optical illumination component 12 and the third optical illumination component 13 can illuminate the area of ​​the clamping port 30 and the flushing port 40.

[0083] In some embodiments of this application, the center point D of the third optical illumination component 13 may be located on the perpendicular bisector of the fourth line BC, or it may be offset from the perpendicular bisector of the fourth line BC.

[0084] like Figure 10 As shown and Figure 11 In some embodiments of this application, the angle bisector of the angle α formed by the first line BA and the second line CA is denoted as AE. Figure 10 As shown, the center point D of the third optical illumination component 13 can be located on the angle bisector AE, or, as... Figure 11 As shown, the center point D of the third optical illumination component 13 can also be offset from the angle bisector AE.

[0085] When the first optical illumination component 11 and the second optical illumination component 12 have the same structure and are equidistantly distributed on both sides of the imaging component 20, the angle bisector AE is the perpendicular bisector of the fourth line BC.

[0086] In some embodiments of this application, the center point D of the third optical illumination component 13 and the clamping opening 30 are located on opposite sides of the angle bisector AE. The clamping opening 30 has a large area, and the third optical illumination component 13 is disposed on the other side of the angle bisector AE. The third optical illumination component 13 and the clamping opening 30 can be separated as much as possible, which can reduce the possibility of structural interference between the third optical illumination component 13 and the clamping opening 30.

[0087] In some embodiments, the distance between the center point D of the third optical illumination component 13 and the angle bisector AE is h, where h is greater than 0 and less than or equal to the diameter of the third optical illumination component 13. In some optional embodiments, such as Figure 11 As shown, the angle bisector AE can pass through the third optical illumination component 13. Further optionally, as... Figure 11 As shown, h is the diameter of the third optical illumination component 13 that is greater than 0 and less than or equal to 0.

[0088] The purpose of this arrangement is to ensure that there is a suitable distance between the third optical illumination component 13 and the clamping opening 30, which can reduce the mutual interference between the two structures and keep the third optical illumination component 13 as close as possible to the angle bisector AE, or it can be located in the middle area of ​​the entire insertion end 100 end face, which is beneficial to improving the uniformity of illumination when illuminating distant scenes.

[0089] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An insertion section of a magnifying endoscope, characterized by comprising: The insertion part includes a plurality of optical illumination components. Each optical illumination component includes a lens barrel, a light guide at least partially disposed within the lens barrel, and an illumination lens disposed within the lens barrel and located on the light-emitting side of the light guide. In at least one of the optical illumination components, there is an air gap between the light-incident side of the illumination lens and the light-emitting side of the light guide. The length of the air gap is d, and the outer diameter of the illumination lens is X, where X / 2 ≤ d ≤ X.

2. The insert of claim 1, wherein The insertion portion further includes an imaging component; the plurality of optical illumination components include a first optical illumination component, a second optical illumination component, and a third optical illumination component; the first optical illumination component and the second optical illumination component are disposed close to the imaging component, and the third optical illumination component is disposed away from the imaging component.

3. The insert of claim 2, wherein, Both the first optical illumination component and the second optical illumination component satisfy the following conditions: there is an air gap between the light-incident side of the illumination lens and the light-outceasing side of the light guide, the length of the air gap is d, the outer diameter of the illumination lens is X, and X / 2≤d≤X.

4. The insert of claim 3, wherein, The third optical illumination component satisfies the following conditions: there is an air gap between the light-incident side of the illumination lens and the light-outceasing side of the light guide, the length of the air gap is d, the outer diameter of the illumination lens is X, and X / 2≤d≤X.

5. The insert of claim 2, wherein, Let the line connecting the center point of the first optical illumination component and the center point of the imaging component be the first line, and let the line connecting the center point of the second optical illumination component and the center point of the imaging component be the second line; The divergence angles of the first and second optical illumination components are greater than or equal to 90° and less than or equal to 130°; on the side where the third optical illumination component is located, the included angle between the first and second connecting lines is greater than or equal to 120° and less than or equal to 180°.

6. The insert of claim 5, wherein, The distance between the first optical illumination component and the imaging component is less than or equal to 3 mm; the distance between the second optical illumination component and the imaging component is less than or equal to 3 mm.

7. The insert part according to claim 5 or 6, characterized in that The divergence angle of the third optical illumination component is smaller than that of the first optical illumination component, and the divergence angle of the third optical illumination component is smaller than that of the second optical illumination component.

8. The insert of claim 6, wherein, The light-emitting area of ​​the third optical lighting component is greater than that of the first optical lighting component, and the light-emitting area of ​​the third optical lighting component is greater than that of the second optical lighting component.

9. The insert of claim 8, wherein, The diameter of the first optical illumination component is 0.8 mm to 1.2 mm; the diameter of the second optical illumination component is 0.8 mm to 1.2 mm; and the diameter of the third optical illumination component is 1.7 mm to 2.3 mm.

10. The insertion portion as claimed in claim 5, characterized in that, Let the line connecting the center point of the first optical illumination component and the center point of the second optical illumination component be the fourth line; the distance between the third optical illumination component and the fourth line is less than or equal to 3 mm; the divergence angle of the third optical illumination component is greater than or equal to 80° and less than or equal to 100°.

11. The insertion portion as claimed in any one of claims 2 to 6, characterized in that, The insertion part has a clamping opening; let the line connecting the center point of the first optical illumination component and the center point of the imaging component be the first line, let the line connecting the center point of the second optical illumination component and the center point of the imaging component be the second line, and let the center point of the third optical illumination component and the clamping opening be located on opposite sides of the angle bisector between the first line and the second line.

12. The insertion portion as claimed in any one of claims 1 to 6, characterized in that, A limiting part is provided on the outer peripheral surface of the light guide, and the limiting part is located outside the lens barrel and abuts against the end face of the lens barrel.

13. A magnifying endoscope, characterized in that, It includes a connecting part, an operating part, and an insertion part as described in any one of claims 1 to 12.

14. An endoscope system, characterized in that, It includes image processing equipment, light source equipment, and the magnifying endoscope as described in claim 13.

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