Endoscope lens and endoscope

Abstract

The endoscope lens comprises a lens seat, a light guide lens and a camera shooting part, the lens seat is provided with a head end face, the head end face is provided with a through hole and a light guide hole, the light guide lens is arranged in the light guide hole and used for allowing light in the lens seat to penetrate outwards, and the camera shooting part is arranged in the through hole and provided with a light passing face. At least part of the light passing face protrudes out of the head end face, and the maximum distance between the light passing face and the head end face is larger than that between the light guide lens and the head end face. By reducing the maximum distance between the light guide lens and the head end face, the distance between the light guide lens and the irradiated object is increased, and the light irradiation range of the light guide lens is enlarged, so that the size of an illumination field formed by the light guide lens is larger than the field angle of the camera part, the regional brightness and visibility in the field angle of the camera part are improved, and the image pickup efficiency is improved. Interference of light of a non-target area on imaging is reduced, and the imaging definition of the camera shooting part is improved.

Description

Technical Field

[0001] This application relates to the field of endoscope technology, specifically to an endoscope lens and an endoscope. Background Technology

[0002] An endoscope is an advanced diagnostic tool widely used in the medical field. It is mainly used to visualize the internal structure of the human body and assist doctors in diagnosis, treatment and surgery.

[0003] Traditional endoscopes typically consist of a camera and a light guide lens. The camera captures images of the area to be observed and presents them to the doctor on a monitor. The light guide lens directs light onto the area to provide sufficient illumination. However, in some related technologies, the camera and light guide lens are poorly designed, resulting in a small illumination field and poor imaging quality. Utility Model Content

[0004] The purpose of this application is to provide an endoscope lens and endoscope, which aims to solve the problems of small illumination field and poor imaging effect of endoscopes in related technologies.

[0005] To achieve the objectives of this application, in a first aspect, this application provides an endoscope, comprising:

[0006] A lens mount, wherein the lens mount has a head end face, and the head end face is provided with a through hole and a light guide hole;

[0007] A light guide lens is disposed within the light guide hole, and the light guide lens is used to allow light from the lens mount to pass outward.

[0008] A camera unit is disposed in the through hole. The camera unit has a light-transmitting surface. At least a portion of the light-transmitting surface protrudes outside the head end face. The maximum distance between the light-transmitting surface and the head end face is greater than the maximum distance between the light guide lens and the head end face.

[0009] In one possible implementation, the distance between the farthest end of the light-transmitting surface facing away from the head end face and the farthest end of the light-guiding lens facing away from the head end face is A, where 0.18mm≤A≤0.23mm.

[0010] In one possible implementation, the light guide lens includes a first light guide lens, a second light guide lens, and a third light guide lens, which are arranged around the camera unit.

[0011] In one possible implementation, the distance between the first light guide lens and the camera unit is B, where 3.5mm ≤ B ≤ 4mm; and / or

[0012] The distance C between the second light guide lens and the camera unit is 3.5mm ≤ C ≤ 4mm; and / or

[0013] The distance between the third light guide lens and the camera unit is D, where 2.5mm ≤ D ≤ 3.0mm.

[0014] In one possible implementation, the diameters of the first and second light guide lenses are E, and the diameter of the third light guide lens is F, satisfying the following relationships: 0.6*E≤F≤0.8*E, and / or, 1.5mm≤E≤2mm, and / or, 1.0mm≤F≤1.5mm.

[0015] In one possible implementation, the light guide lens includes a first light guide lens, a second light guide lens, and a third light guide lens;

[0016] The distance between the first light guide lens and the second light guide lens is G, where 7.5mm ≤ G ≤ 8.0mm; and / or

[0017] The distance between the first light guide lens and the third light guide lens is H, where 5.5mm ≤ H ≤ 6.0mm; and / or

[0018] The distance between the second light guide lens and the third light guide lens is J, where 4.5mm ≤ J ≤ 5.0mm.

[0019] In one possible implementation, the endoscope further includes a water-air nozzle disposed on the head end face, the water-air nozzle being used to spray water to clean the light-transmitting surface;

[0020] The maximum distance between the water vapor nozzle and the head end face is greater than the maximum distance between the light-transmitting surface and the head end face.

[0021] In one possible implementation, the endoscope further includes a water vapor nozzle disposed on the head end face, the water vapor nozzle being used to spray water to clean the camera unit;

[0022] The field of view of the camera is α1, the maximum distance between the water vapor nozzle and the head end face is K, and the distance between the water vapor nozzle and the camera is L, satisfying the following relationships: 155°≤α1≤175°, 0.5mm≤K≤0.7mm, L≥4.0mm.

[0023] In one possible implementation, the camera unit further includes a side surface connected to the light-transmitting surface, the side surface being at least partially inserted through the through hole, and the side surface being provided with a light-shielding layer.

[0024] Secondly, this application also provides an endoscope, the endoscope including an endoscope lens, the endoscope comprising:

[0025] A lens mount, wherein the lens mount has a head end face, and the head end face is provided with a through hole and a light guide hole;

[0026] A light guide lens is disposed within the light guide hole, and the light guide lens is used to allow light from the lens mount to pass outward.

[0027] A camera unit is disposed in the through hole. The camera unit has a light-transmitting surface. At least a portion of the light-transmitting surface protrudes outside the head end face. The maximum distance between the light-transmitting surface and the head end face is greater than the maximum distance between the light guide lens and the head end face.

[0028] This application reduces the maximum distance between the light guide lens and the head end face, thereby increasing the distance between the light guide lens and the irradiated object and expanding the light illumination range of the light guide lens. As a result, the size of the illumination field formed by the light guide lens is larger than the field of view of the camera, improving the brightness and visibility of the area within the field of view of the camera, reducing the interference of light from non-target areas on the imaging, and improving the clarity of the imaging of the camera. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 from these drawings without creative effort.

[0030] Figure 1 A schematic diagram of one embodiment of the endoscope provided in this application;

[0031] Figure 2 for Figure 1 Schematic diagram of the structure of a central endoscope;

[0032] Figure 3 for Figure 2 A structural diagram from another perspective;

[0033] Figure 4 A graph showing the relationship between the spatial angle and light intensity for endoscopic lens illumination;

[0034] Figure 5 This is a diagram showing the illuminance distribution on the receiving surface when the light source from the endoscope shines on it.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1000-Endoscope;

[0037] 100-Endoscope;

[0038] 1-Lens mount, 11-Head end face, 12-Through hole, 13-Light guide hole, 131-First light guide hole, 132-Second light guide hole, 133-Third light guide hole, 14-Operation hole, 15-Ventilation hole;

[0039] 2-Light guide lens, 21-First light guide lens, 22-Second light guide lens, 23-Third light guide lens;

[0040] 3-Camera section, 31-Light-transmitting surface, 32-Side view;

[0041] 4-Water vapor nozzle;

[0042] 200 - Bending section;

[0043] 300-Insertion section;

[0044] 400-Operating Department. Detailed Implementation

[0045] 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 a part of the embodiments of this application, and not all of them. 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.

[0046] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0048] 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.

[0049] Please refer to Figure 1This application discloses an endoscope 1000. In some embodiments, the endoscope 1000 includes an operating part 400, an insertion part 300, a bending part 200, a light source module (not shown in the figure), and an endoscope lens 100. The operating part 400 is used to control the movement and function settings of the endoscope 1000, so that the operator can flexibly adjust the direction and posture of the endoscope 1000 during the examination. One end of the insertion part 300 is connected to the operating part 400, and the other end is connected to the endoscope lens 100. The insertion part 300 is used to guide the transmission of light and image signals and provides a channel to facilitate the insertion and movement of the endoscope 1000 inside the body.

[0050] The curved part 200 is connected to the insertion part. The curved part 200 is used to rotate flexibly in narrow or tortuous internal spaces, so that the endoscope 1000 can be flexibly adjusted at different angles and directions, improving the adaptability and operability of the endoscope 1000.

[0051] The light source module is integrated into the endoscope host and is connected to the endoscope lens 100 via optical fiber or light guide material, thereby providing a light source for the target area observed by the endoscope lens 100 and improving the clarity of the observation of the target area by the endoscope lens 100. The light source module can be an LED light source, a halogen light source, or a laser light source; this application does not impose any restrictions on this.

[0052] The endoscope 100 is located at the end of the curved portion 200 away from the insertion portion 300. The endoscope 100 is used to capture images of the target observation area and transmit them to an external display device to achieve real-time observation and diagnosis, while ensuring clear and high-definition image quality during the examination.

[0053] Please refer to Figure 2 and Figure 3 In some embodiments, the endoscope 100 includes a lens mount 1, a light guide lens 2, and an imaging unit 3. The lens mount 1 serves as the main structural component of the endoscope 100, supporting and connecting the various parts of the endoscope 100 assembly. The lens mount 1 has a lens cavity that communicates with the cavity of the lens cavity insertion part 300. Light from the light source module can enter the lens cavity through the cavity of the insertion part 300 via an optical fiber or other light guide material. The lens mount 1 has a head end face 11 facing the observation area, and the head end face 11 has a through hole 12 and a light guide hole 13.

[0054] In some embodiments, the lens mount 1 is further formed with an operation hole 14 communicating with the lens cavity. The operation hole 14 is used for external surgical instruments or devices to pass through in order to operate, treat or sample the observation area.

[0055] In some embodiments, the lens mount 1 is provided with a vent 15. Correspondingly, the insertion part 300 or the operation part 400 is integrated with an air source component. The air source component can blow airflow into the observation area through the vent 15, thereby dispersing the fog and water vapor generated in the observation area, and removing blood, tissue fragments or other impurities in the observation area, ensuring that doctors can obtain clearer images when performing diagnosis or surgery.

[0056] The camera unit 3 is installed within the through-hole 12 to capture images and videos of the observation area and transmit them in real time to an external monitor or recording device for diagnosis and surgical procedures by the doctor. The camera unit 3 can be a charge-coupled device (CCD) camera, a complementary metal-oxide-semiconductor (CMOS) camera, or a high-definition or ultra-high-definition camera; this application does not limit the scope of the application.

[0057] In some embodiments, the camera unit 3 includes a light-transmitting surface 31 and a side surface 32 connected to the light-transmitting surface 31. The light-transmitting surface 31 is used to receive and transmit light from the observation area so as to transmit image signals to the processing system of the endoscope 1000. The side surface 32 at least partially passes through the through hole 12 so that the camera unit 3 can be installed in the through hole 12.

[0058] In some embodiments, the side 32 is provided with a light-shielding layer for further reducing or blocking stray light from the surrounding environment, reducing interference from background light on the imaging unit 3, thereby ensuring that the imaging unit 3 can receive a clearer and more accurate image signal. The light-shielding layer can be made of black plastic, rubber, or a metal coating; this application does not limit this. In some embodiments, the light-shielding layer uses carbon powder. Compared to other materials, carbon powder has excellent light-shielding effect, effectively blocking stray light intrusion and ensuring that the light received by the imaging unit 3 comes only from the observation area, thereby improving image quality. In addition, carbon powder is relatively lightweight, which helps to improve the portability and operational flexibility of the endoscope 1000.

[0059] A light guide lens 2 is disposed within the light guide hole 13. The light guide lens 2 is used to guide the light from the light source module to illuminate the observation area, thereby providing illumination for the imaging of the camera unit 3 and improving the clarity of the image formed by the camera unit 3. The light guide lens 2 can be a spherical lens, an aspherical lens, or a planar lens; this application does not impose any limitations on this.

[0060] In related technologies, the light guide lens 2 and the camera unit 3 are usually disposed on the same plane. The illumination field formed by the light guide lens 2 is small, and the imaging clarity of the camera unit 3 is poor.

[0061] To address the aforementioned problems, in one embodiment of this application, at least a portion of the light-transmitting surface 31 protrudes beyond the head end face 11, and the maximum distance between the light-transmitting surface 31 and the head end face 11 is greater than the maximum distance between the light guide lens 2 and the head end face 11. This reduces the maximum distance between the light guide lens 2 and the head end face 11, thereby increasing the distance between the light guide lens 2 and the irradiated object, expanding the light illumination range of the light guide lens 2. Consequently, the size of the illumination field formed by the light guide lens 2 is greater than the field of view of the imaging unit 3, improving the brightness and visibility of the area within the field of view of the imaging unit 3, reducing interference from light from non-target areas on imaging, and improving the clarity of the image formed by the imaging unit 3.

[0062] It should be noted that in determining the maximum distance between the light-transmitting surface 31 and the head end surface 11, if both the light-transmitting surface 31 and the head end surface 11 are planes, then the maximum distance between the light-transmitting surface 31 and the head end surface 11 refers to the perpendicular distance from any point on the light-transmitting surface 31 to the head end surface 11. If the light-transmitting surface 31 and the head end surface 11 are curved surfaces or other irregularly shaped surfaces, then the maximum distance between the light-transmitting surface 31 and the head end surface 11 refers to the straight-line distance between the farthest endpoints of the light-transmitting surface 31 and the head end surface 11 in the illumination direction of the light source module.

[0063] In determining the maximum distance between the light guide lens 2 and the head end face 11, if the light guide lens 2 and the head end face 11 are planar surfaces, then the maximum distance between the light guide lens 2 and the head end face 11 is the perpendicular distance from any point on the light guide lens 2 to the head end face 11. If the light guide lens 2 and the head end face 11 are curved surfaces or other regular or irregular shaped surfaces, then the maximum distance between the light guide lens 2 and the head end face 11 refers to the straight-line distance between the farthest endpoints of the light guide lens 2 and the head end face 11 in the illumination direction of the light source module.

[0064] There are several ways to make the maximum distance between the light-transmitting surface 31 and the head end surface 11 greater than the maximum distance between the light guide lens 2 and the head end surface 11. In some embodiments, both the light-transmitting surface 31 and the light guide lens 2 protrude beyond the head end surface 11, and the protrusion distance of the light-transmitting surface 31 is greater than the protrusion distance of the light guide lens 2. In this way, the maximum distance between the light-transmitting surface 31 and the head end surface 11 is greater than the maximum distance between the light guide lens 2 and the head end surface 11, thereby increasing the distance between the light guide lens 2 and the irradiated object.

[0065] In some embodiments, the light-transmitting surface 31 can protrude beyond the end face 11, while the light guide lens 2 is recessed into the lens cavity. In this case, the distance by which the light-transmitting surface 31 protrudes beyond the end face 11 is greater than the distance by which the light guide lens 2 is recessed into the lens cavity. This also allows the maximum distance between the light-transmitting surface 31 and the end face 11 to be greater than the maximum distance between the light guide lens 2 and the end face 11, thus increasing the distance between the light guide lens 2 and the irradiated object. Understandably, compared to recessing the light guide lens 2 into the lens cavity, protruding the light guide lens 2 beyond the end face 11 can effectively increase the angle of incidence of light, improve the effective illumination range of light, reduce the possibility of foreign objects falling into the lens cavity, and improve the light guiding effect of the light guide lens 2.

[0066] In some embodiments, the distance between the farthest point of the light-transmitting surface 31 facing away from the head end face 11 and the farthest point of the light guide lens 2 facing away from the head end face 11 is A, 0.18mm≤A≤0.23mm. Within this size constraint, an excessively large distance between the light-transmitting surface 31 and the light guide lens 2 can be avoided, which would lead to excessive scattering or attenuation of light during transmission, affecting the clarity and brightness of the image. Simultaneously, it ensures that the light can be fully focused, optimizing the illumination effect to achieve the desired image quality. Furthermore, an excessively small distance between the light-transmitting surface 31 and the light guide lens 2 can be avoided, which would reduce the area of ​​the illumination field formed by the light guide lens 2, or allow the light from the light guide lens 2 to directly enter the light-transmitting surface 31, thus forming stray light and affecting the image quality of the camera unit 3.

[0067] In some embodiments, the light guide aperture 13 includes a first light guide aperture 131, a second light guide aperture 132, and a third light guide aperture 133, which are arranged around the imaging unit 3. The light guide lens 2 includes a first light guide lens 21, a second light guide lens 22, and a third light guide lens 23, with the first light guide lens 21 disposed within the first light guide aperture 131, the second light guide lens 22 disposed within the second light guide aperture 132, and the third light guide lens 23 disposed within the third light guide aperture 133, thereby arranging the first light guide lens 21, the second light guide lens 22, and the third light guide lens 23 around the imaging unit 3. This effectively guides light to various directions of the imaging unit 3, ensuring uniform light distribution throughout the observation area and improving the uniformity of the illumination field.

[0068] In some embodiments, the distance between the first light guide lens 21 and the camera unit 3 is B, the distance between the second light guide lens 22 and the camera unit 3 is C, the distance between the third light guide lens 23 and the camera unit 3 is D, the distance between the first light guide lens 21 and the second light guide lens 22 is G, the distance between the first light guide lens 21 and the third light guide lens 23 is H, and the distance between the second light guide lens 22 and the third light guide lens 23 is J. B, C, D, G, H, and J satisfy the following relationships: 3.5mm≤B≤4mm, and / or, 3.5mm≤C≤4mm, and / or, 2.5mm≤D≤3.0mm, and / or, 7.5mm≤G≤8.0mm, and / or, 5.5mm≤H≤6.0mm, and / or, 4.5mm≤J≤5.0mm.

[0069] Please refer to Figure 4 and Figure 5 ,in, Figure 4 This is a graph showing the relationship between the spatial angle and light intensity of illumination from an endoscope lens 100. Figure 5 This is a diagram showing the illuminance distribution on the receiving surface when the light source of the endoscope lens 100 illuminates it. Figure 4 and Figure 5 As can be seen, with the above-mentioned size settings, the illumination field formed by the light guide lens 2 can form an illumination field with relatively uniform light intensity within the field of view of the camera unit 3, and the light intensity does not decrease to 0 at ±90° of the field of view of the camera unit 3. The range of the illumination field is larger than the field of view, and the camera unit 3 has a better imaging effect.

[0070] In some embodiments, the diameters of the first light guide lens 21 and the second light guide lens 22 are E, and the diameter of the third light guide lens 23 is F, satisfying the following relationships: 0.6*E≤F≤0.8*E, and / or, 1.5mm≤E≤2mm, and / or, 1.0mm≤F≤1.5mm. This configuration, on the one hand, ensures the illumination effect of the first light guide lens 21, the second light guide lens 22, and the third light guide lens 23 while effectively controlling the size of the head end face 11 of the lens mount 1, reducing the volume of the endoscope 100, and expanding the application scenarios of the endoscope 100, all within this size constraint. By reducing the diameter of the third light guide lens 23, the area of ​​the head end face 11 of the lens mount 1 can be effectively reduced, the volume of the endoscope 100 can be reduced, the interference of the third light guide lens 23 on the internal channel of the endoscope 1000 can be reduced, the movable space of external surgical instruments or equipment within the endoscope 1000 can be increased, and the application scenarios of the endoscope 100 can be expanded.

[0071] To improve the imaging quality and clarity of the camera unit 3, in some embodiments, the endoscope lens 100 further includes a water vapor nozzle 4, which is disposed on the head end face 11. The water vapor nozzle 4 is used to spray water to clean the light-transmitting surface 31, thereby keeping the light-transmitting surface 31 clean, preventing the accumulation of body fluids and impurities, thereby ensuring that light can fully pass through the light-transmitting surface 31 and improving the clarity of the imaging of the camera unit 3.

[0072] In some embodiments, the maximum distance between the water vapor nozzle 4 and the head end face 11 is greater than the maximum distance between the light transmission surface 31 and the head end face 11. This ensures that the water mist from the water vapor nozzle 4 can fully cover the light transmission surface 31 when spraying water, thus achieving a more effective cleaning effect.

[0073] To avoid the water vapor nozzle obstructing the imaging of the camera unit 3, in one embodiment of this application, the field of view of the camera unit 3 is α1, the maximum distance between the water vapor nozzle 4 and the head end face 11 is K, and the distance between the water vapor nozzle 4 and the camera unit 3 is L, satisfying the following relationships: 155°≤α1≤175°, 0.5mm≤K≤0.7mm, and L≥4.0mm. Under the above limitations of the field of view and distance dimensions, it can be ensured that the water vapor nozzle is always outside the field of view of the camera unit 3, thereby avoiding the water vapor nozzle obstructing the imaging of the target area and ensuring the integrity of the image acquisition of the target area by the camera unit 3.

[0074] In the description of the embodiments of this application, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to 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 application.

[0075] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. An endoscope head, characterized by, The endoscope lens comprises: a lens seat having a head end face provided with a through hole and a light guide hole; a light guide lens arranged in the light guide hole, the light guide lens being used for light in the lens seat to transmit outwards; a camera unit arranged in the through hole, the camera unit having a light passing face, at least part of the light passing face being arranged outside the head end face, and the maximum distance between the light passing face and the head end face being greater than the maximum distance between the light guide lens and the head end face.

2. The endoscope head of claim 1, wherein, The distance between the farthest end of the light passing face away from the head end face and the farthest end of the light guide lens away from the head end face is A, and 0.18mm≤A≤0.23mm.

3. The endoscope head of claim 1, wherein, The light guide lens comprises a first light guide lens, a second light guide lens and a third light guide lens, and the first light guide lens, the second light guide lens and the third light guide lens are arranged around the camera unit.

4. The endoscope head of claim 3, wherein, The distance between the first light guide lens and the camera unit is B, and 3.5mm≤B≤4mm; and / or The distance between the second light guide lens and the camera unit is C, and 3.5mm≤C≤4mm; and / or The distance between the third light guide lens and the camera unit is D, and 2.5mm≤D≤3.0mm.

5. The endoscope head of claim 3, wherein The diameter of the first light guide lens and the second light guide lens is E, and the diameter of the third light guide lens is F, and the relationship is 0.6*E≤F≤0.8*E, and / or, 1.5mm≤E≤2mm, and / or, 1.0mm≤F≤1.5mm.

6. The endoscope head of any one of claims 1-5, wherein, The light guide lens comprises a first light guide lens, a second light guide lens and a third light guide lens; The distance between the first light guide lens and the second light guide lens is G, and 7.5mm≤G≤8.0mm; and / or The distance between the first light guide lens and the third light guide lens is H, and 5.5mm≤H≤6.0mm; and / or The distance between the second light guide lens and the third light guide lens is J, and 4.5mm≤J≤5.0mm.

7. The endoscope head of claim 1, wherein The endoscope lens further comprises a water and air nozzle arranged on the head end face, and the water and air nozzle is used for spraying water to clean the light passing face. The maximum distance between the water and air nozzle and the head end face is greater than the maximum distance between the light passing face and the head end face.

8. The endoscope head of claim 1, wherein, The endoscope lens further comprises a water and air nozzle arranged on the head end face, and the water and air nozzle is used for spraying water to clean the camera unit. The camera unit further comprises a side face connected with the light passing face, the side face is at least partially arranged in the through hole, and the side face is provided with a light shielding layer.

9. The endoscope head of claim 1, wherein The endoscope lens comprises the endoscope lens according to any one of claims 1-9.

10. An endoscope characterized by comprising: ​

Images