Endoscope

Abstract

The utility model belongs to the technical field of imaging devices, and particularly discloses an endoscope which comprises an imaging device used for transmitting images; the first image sensor is arranged on the image side of the imaging device, and the first image sensor is used for receiving the light transmitted by the imaging device and collecting an image; the amplifying device comprises a photoelectric conversion device, an image display, a second image sensor and an amplifying lens group; the photoelectric conversion device is used for converting images acquired by the first image sensor into electric signals and transmitting the electric signals to the image display; the image display is used for displaying the images; the image display is arranged on the object side of the magnifying lens group, the second image sensor is arranged on the image side of the magnifying lens group, and the magnifying lens group is used for magnifying an image displayed by the image display and projecting the magnified image to the second image sensor. According to the endoscope, the technical problem that the image definition is reduced due to the fact that pixels of an obtained image frame are enlarged through a software interpolation algorithm processing means can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of imaging devices, and specifically relates to an endoscope. Background Art

[0002] Endoscopes are widely used in medical analysis, industrial inspection, precision design, and energy exploration. They capture images within a specific space, then magnify them and display them on a terminal display. Currently, this method primarily uses software interpolation algorithms to increase image pixel size, but this magnification method can reduce image clarity. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide an endoscope to solve the technical problem in the prior art of using software interpolation algorithm processing means to enlarge the pixels of the image obtained by the endoscope, resulting in a decrease in image clarity.

[0004] To achieve the above-mentioned objectives, an embodiment of the present application provides an endoscope, comprising: an imaging device for transmitting images; a first image sensor, arranged on the image side of the imaging device, the first image sensor being used to receive light transmitted by the imaging device and capture images; an amplifying device, the amplifying device comprising a photoelectric conversion device, an image display, a second image sensor and a magnifying lens group; the photoelectric conversion device being electrically connected to the first image sensor and the image display, the photoelectric conversion device being used to convert the image captured by the first image sensor into an electrical signal and transmit the signal to the image display, the image display being used to receive the electrical signal transmitted by the photoelectric conversion device and display the image; the image display being arranged on the object side of the magnifying lens group, the second image sensor being arranged on the image side of the magnifying lens group, the magnifying lens group being used to amplify the image displayed on the image display and project the amplified image onto the second image sensor.

[0005] In some embodiments, the magnifying lens assembly includes a bi-telecentric lens.

[0006] In some embodiments, the magnifying lens group includes a first meniscus lens, a first doublet lens, a first aperture, a second doublet lens, a third doublet lens, a second meniscus lens, a third meniscus lens, a fourth meniscus lens, and a fifth meniscus lens, which are arranged in sequence from the image display to the second image sensor; the first meniscus lens is used to converge the light transmitted by the image display and transmit the light to the first doublet lens, the first doublet lens is used to converge the light transmitted by the first meniscus lens and transmit the light to the second doublet lens, and the second doublet lens is used to converge the light transmitted by the first doublet lens and transmit the light to The third doublet lens is used to converge the light transmitted by the second doublet lens and transmit the light to the second meniscus lens. The second meniscus lens is used to diverge the light transmitted by the third doublet lens and transmit the light to the third meniscus lens. The third meniscus lens is used to diverge the light transmitted by the second meniscus lens and transmit the light to the fourth meniscus lens. The fourth meniscus lens is used to converge the light transmitted by the third meniscus lens and transmit the light to the fifth meniscus lens. The fifth meniscus lens is used to converge the light transmitted by the fourth meniscus lens and form parallel light. The second image sensor is used to receive the parallel light emitted from the fifth meniscus lens.

[0007] In some embodiments, the imaging device includes a disposable image-transmitting light-guiding device and an imaging lens group, and the disposable image-transmitting light-guiding device includes a front-end imaging device and a light guide; the front-end imaging device is arranged on the imaging side of the light guide; the light guide is arranged between the front-end imaging device and the imaging lens group; the first image sensor is arranged on the image side of the imaging lens group; the front-end imaging device is used to receive light reflected by the object to be observed and transmit the light to the light guide; the light guide is used to receive light transmitted by the front-end imaging device and transmit the light to the imaging lens group, and the imaging lens group is used to receive light transmitted by the light guide and transmit the light to the first image sensor.

[0008] In some embodiments, the front-end imaging device includes a first light-incoming surface, a first reflecting surface and a first light-emitting surface; the first light-incoming surface and the first reflecting surface are arranged along a first direction, the first direction is perpendicular to the optical axis of the light guide, and the first light-incoming surface is used to transmit the light reflected by the object to be observed; the first reflecting surface is arranged at an angle to the first light-incoming surface and the first light-emitting surface, and the first reflecting surface is used to reflect the light transmitted by the first light-incoming surface and reflect the light toward the light guide; the first light-emitting surface and the first reflecting surface are arranged along the optical axis direction of the light guide, and the first light-emitting surface is used to transmit the light reflected by the first reflecting surface; or, the front-end imaging device extends along the optical axis direction of the light guide, and the front-end imaging device has a second light-incoming surface and a second light-emitting surface, and the second light-incoming surface and the second light-emitting surface are respectively arranged at both ends of the front-end imaging device along the optical axis direction of the light guide.

[0009] In some embodiments, the first light incident surface is an arc surface or a plane, the first reflective surface is an arc surface or a plane, and the first light emitting surface is an arc surface or a plane.

[0010] In some embodiments, optical glue is provided between the front-end imaging device and the light guide, and the thickness of the optical glue ranges from 5um to 10um; or, the front-end imaging device and the light guide are an integrated structure.

[0011] In some embodiments, the imaging lens group includes a first convex lens, a first concave lens, a second concave lens and a second convex lens arranged in sequence from the object side to the image side along its optical axis; the first convex lens is used to converge the light transmitted by the light guide and transmit the light to the first concave lens, the first concave lens is used to diverge the light transmitted by the first convex lens and transmit the light to the second concave lens, the second concave lens is used to diverge the light transmitted by the first concave lens and transmit the light to the second convex lens, the second convex lens is used to converge the light transmitted by the second concave lens and form parallel light, and the first image sensor is used to receive the parallel light emitted from the second convex lens.

[0012] In some embodiments, the imaging lens group includes at least one aspherical surface; the refractive index of the first convex lens and the second convex lens ranges from 1.49 to 1.65; and the refractive index of the first concave lens and the second concave lens ranges from 1.55 to 1.95.

[0013] In some embodiments, the imaging lens group further includes a protective lens and an infrared filter. The protective lens is arranged on a side of the first convex lens away from the first concave lens; the infrared filter is arranged between the second convex lens and the first image sensor.

[0014] In some embodiments, the extension direction of the light guide is consistent with the arrangement direction of the light guide and the front-end imaging device, and the light guide is used to transmit the main light with an angle a with its optical axis, a greater than or equal to -0.5° and less than or equal to 0.5°.

[0015] In some embodiments, the optical axis of the imaging lens group coincides with the optical axis of the light guide; or, the optical axis of the imaging lens group is set at an angle to the optical axis of the light guide, and a turning prism is provided between the imaging lens group and the light guide, the turning prism has a second reflecting surface, the second reflecting surface is set at an angle to the optical axis of the light guide, the second reflecting surface is set at an angle to the optical axis of the imaging lens group, and the turning prism is used to reflect the light transmitted by the light guide toward the imaging lens group.

[0016] In some embodiments, the disposable image transmission and light guiding device includes an auxiliary light source, which is arranged on a side of the front-end imaging device close to the object to be observed, and is used to provide illumination.

[0017] In some embodiments, the endoscope includes an illumination assembly, which includes a main light source and a dichroic prism; the main light source is arranged on the side of the dichroic prism along the optical axis of the vertical light guide, and the main light source is used to emit light to the dichroic prism; the dichroic prism is arranged along the optical axis direction of the light guide on the side of the imaging lens group and the light guide away from the front-end imaging device, and the dichroic prism is used to reflect the light emitted by the main light source to the light guide, and the dichroic prism is also used to transmit the light emitted from the light guide to the dichroic prism.

[0018] In some embodiments, the disposable image transmission and light guide device also includes a shell member extending along the length direction of the light guide member, the light guide member and the front-end imaging device are arranged in the shell member, and the disposable image transmission and light guide device is detachably connected to the imaging lens group; the light guide member and the shell member are double-material injection-molded; or, the light guide member and the shell member are interference fit.

[0019] In some embodiments, the endoscope includes two magnifying devices, which are respectively a first magnifying device and a second magnifying device; the photoelectric conversion device in the first magnifying device is electrically connected to the first image sensor; the photoelectric conversion device in the second magnifying device is electrically connected to the second image sensor in the first magnifying device.

[0020] In some embodiments, the endoscope includes at least three magnification devices.

[0021] The beneficial effect of the endoscope provided by the present application is that: after the imaging device amplifies the image, the photoelectric conversion device can transmit the image to the image display, so that the magnifying lens group can amplify the image again. Compared with the electronic amplification method, the light is focused by the lens to form an amplified image, and the light is focused by the magnifying lens group for optical amplification, which can well preserve the original information of the image and transmit it to the subsequent application, reduce the image distortion, improve the image clarity, and facilitate the observation of the amplified image. The magnifying lens group and the imaging device can be connected by a cable, and the volume of the magnifying lens group does not affect the operator's hand-held operation of the magnifying lens group, so the magnifying lens group can be set to a larger diameter, which can achieve high resolution and large magnification display of the image. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 Schematic diagram of an endoscope provided in some embodiments of the present application Figure 1 ;

[0024] Figure 2 Schematic diagram of an imaging device provided in some embodiments of the present application Figure 1 ;

[0025] Figure 3 for Figure 2 Schematic diagram of the internal structure of the imaging device;

[0026] Figure 4 Schematic diagram of an imaging device provided in some embodiments of the present application Figure 2 ;

[0027] Figure 5 Schematic diagram of the front-end imaging device and part of the light guide provided in some embodiments of the present application Figure 1 ;

[0028] Figure 6 Schematic diagram of the front-end imaging device and part of the light guide provided in some embodiments of the present application Figure 2 ;

[0029] Figure 7 Parameter values ​​of each lens in the imaging device provided in some embodiments of the present application;

[0030] Figure 8 The high-order coefficients of the image-facing side of the second convex lens provided in some embodiments of the present application;

[0031] Figure 9 for Figure 4 Schematic diagram of the imaging optical path of the imaging device;

[0032] Figure 10 Schematic diagram of an imaging device provided in some embodiments of the present application Figure 3 ;

[0033] Figure 11 for Figure 10 Schematic diagram of the illumination light path of the imaging device;

[0034] Figure 12 Schematic diagram of an imaging device provided in some embodiments of the present application Figure 4 ;

[0035] Figure 13 for Figure 12 Schematic diagram of the imaging optical path of the imaging device;

[0036] Figure 14 Schematic diagram of an imaging device provided in some embodiments of the present application Figure 5 ;

[0037] Figure 15 A schematic diagram of an amplification device provided in some embodiments of the present application;

[0038] Figure 16Parameter values ​​of each lens in the magnifying lens group provided in some embodiments of the present application;

[0039] Figure 17 for Figure 15 Schematic diagram of the imaging optical path of the middle magnification device;

[0040] Figure 18 Schematic diagram of an endoscope provided in some embodiments of the present application Figure 2 .

[0041] Among them, the reference numerals in the figures are:

[0042] 100. Endoscope;

[0043] 10. Imaging device; 11. Disposable image transmission and light guide device; 111. Front-end imaging device; 1111. First light-incoming surface; 1112. First reflecting surface; 1113. First light-emitting surface; 1114. Second light-incoming surface; 1115. Second light-emitting surface; 1116. First turning optical axis; 1117. Second turning optical axis; 112. Auxiliary light source; 113. Light guide; 114. Housing; 12. Imaging lens assembly; 121. Protective lens; 122. First convex lens; 123. First concave lens; 124. Second concave lens; 125. Second convex lens; 126. Infrared filter; 127. Filter; 13. Second aperture; 14. Turning prism; 141. Second reflecting surface; 15. Handle;

[0044] 20. a first image sensor;

[0045] 30. Amplifying device; 31. Photoelectric conversion device; 32. Image display; 33. Amplifying lens group; 331. First meniscus lens; 332. First doublet lens; 333. First aperture; 334. Second doublet lens; 335. Third doublet lens; 336. Second meniscus lens; 337. Third meniscus lens; 338. Fourth meniscus lens; 339. Fifth meniscus lens; 34. Second image sensor; 35. First amplifying device; 36. Second amplifying device;

[0046] 40. Lighting assembly; 41. Main light source; 42. Beam splitter prism; 43. Collimating lens;

[0047] 50. Object to be observed. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0049] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0050] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0051] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0052] An embodiment of the present application provides an endoscope for acquiring and magnifying images. It can be understood that the endoscope can be used to acquire images of the interior of the human body in medical analysis, and can also be used to acquire images of confined spaces in other fields such as industrial inspection.

[0053] Please refer to Figure 1 The endoscope 100 includes an imaging device 10, a first image sensor 20 and a magnifying device 30; the imaging device 10 is used to transmit images; the first image sensor 20 is arranged on the image side of the imaging device 10, and the first image sensor 20 is used to receive the light transmitted by the imaging device 10 and collect images; the magnifying device 30 includes a photoelectric conversion device 31, an image display 32, a second image sensor 34 and a magnifying lens group 33; the photoelectric conversion device 31 is electrically connected to the first image sensor 20 and the image display 32, the photoelectric conversion device 31 is used to convert the image collected by the first image sensor 20 into an electrical signal and transmit it to the image display 32, the image display 32 is used to receive the electrical signal transmitted by the photoelectric conversion device 31 and display the image; the image display 32 is arranged on the object side of the magnifying lens group 33, and the second image sensor 34 is arranged on the image side of the magnifying lens group 33, the magnifying lens group 33 is used to magnify the image displayed on the image display 32, and project the magnified image to the second image sensor 34.

[0054] The imaging device 10 is configured to transmit light reflected from an object 50 to be observed. Specifically, the imaging device 10 can capture and transmit an image of the object 50. For example, the imaging device 10 can include a lens assembly that can magnify the image of the object 50. For example, the optical path of the imaging device 10 is a bi-telecentric optical path.

[0055] The first image sensor 20 is disposed on the image side of the imaging device 10 and is configured to receive light emitted from the imaging device 10 to the image side, that is, to receive the image transmitted by the imaging device 10. The first image sensor 20 is configured to capture image pixels.

[0056] Optionally, the size of the first image sensor 20 is greater than or equal to 1 / 31 inch and less than or equal to 1 / 9 inch. For example, the size of the first image sensor 20 is 1 / 18 inch, the number of pixels is 160K, the pixel size is 1.75 μm, and the sensing area size is 714 μm × 707 μm. The first image sensor 20 is set to a smaller size to adapt to the imaging device 10 with a smaller diameter, making it easier for the imaging device 10 to enter a narrow space.

[0057] The photoelectric conversion device 31 can convert optical signals into electrical signals. The input end of the photoelectric conversion device 31 is electrically connected to the first image sensor 20, and the photoelectric conversion device 31 can convert the image captured by the first image sensor 20 into an electrical signal; the output end of the photoelectric conversion device 31 is electrically connected to the image display 32, and the photoelectric conversion device 31 can transmit the electrical signal with image information to the image display 32.

[0058] The photoelectric conversion device 31 and the first image sensor 20, as well as the photoelectric conversion device 31 and the image display 32, can be connected via signal transmission cables. For example, the photoelectric conversion device 31 can be an embedded system, including a first controller corresponding to the first image sensor 20, capable of performing image data acquisition and image processing. For example, the photoelectric conversion device 31 can also include a second controller capable of transmitting images processed by the first controller to the image display 32.

[0059] The image display 32 can display an image of the object to be observed 50 according to the electrical signal transmitted by the photoelectric conversion device 31 , and can emit the image to the magnifying lens group 33 in the form of light.

[0060] For example, the image display 32 includes a DIP (Digital Light Processing) display, an LCOS (Liquid Crystal On Silicon) display, a MiniLED (Sub-millimeter Light-Emitting Diode) display, or a MicroLED (Micro Light-Emitting Diode) display, and the size of the image display 32 is greater than or equal to 0.1 inches and less than or equal to 1.0 inches. Optionally, the pixel size of the image display 32 is greater than or equal to 1.5 μm and less than or equal to 3.5 μm, and the PPI (Pixels Per Inch) is greater than or equal to 2,000 and less than or equal to 20,000.

[0061] The magnifying lens group 33 can receive light emitted by the image display 32 and transmit the light to the image side of the magnifying lens group 33. That is, the magnifying lens group 33 can transmit the image displayed by the image display 32 to the second image sensor 34. The magnifying lens group 33 is a lens group that can magnify the image.

[0062] The second image sensor 34 is disposed on the image side of the magnifying lens group 33. The second image sensor 34 can receive light emitted by the magnifying lens group 33, that is, receive the image magnified by the magnifying lens group 33. The second image sensor 34 is used to collect image pixels.

[0063] For example, the resolution of the second image sensor 34 is greater than 25 million pixels. For example, the pixel resolution of the second image sensor 34 is 11276 (horizontal) × 9200 (vertical). Optionally, the pixel size of the second image sensor 34 is greater than or equal to 2 μm and less than or equal to 10 μm. The second image sensor 34 uses global shutter technology and adopts the CXP12 protocol (CoaXPress) or the GigE protocol (Gigabit Ethernet Vision), with an acquisition speed exceeding 20 fps (frames per second) at full resolution.

[0064] The working process of the embodiment of the present application is as follows: the imaging device 10 transmits an image of the object 50 to be observed to the first image sensor 20. The first image sensor 20 receives the light transmitted by the imaging device 10 to capture the image of the object 50. The photoelectric conversion device 31 converts the image captured by the first image sensor 20 into an electrical signal and transmits the electrical signal to the image display 32. The image display 32 receives the electrical signal transmitted by the photoelectric conversion device 31 to display the image transmitted by the photoelectric conversion device 31. The image display 32 transmits the image in the form of light to the magnifying lens group 33. The magnifying lens group 33 receives the light emitted by the image display 32, amplifies the image displayed by the image display 32, and transmits it to the second image sensor 34. The second image sensor 34 captures the image transmitted by the magnifying lens group 33 toward the image side. The final image captured by the second image sensor 34 is transmitted to an external display screen, and the image can be observed.

[0065] The endoscope 100 generally needs to be used in a small space, so the imaging device 10 is relatively small. Due to the limitation of the size of the imaging device 10, the image transmitted by the imaging device 10 is usually difficult to be magnified multiple times, resulting in unclear images, and the image needs to be magnified for observation; the currently commonly used image magnification method is mainly electronic magnification, which uses software "interpolation" algorithm processing to expand the image pixels, resulting in a decrease in image clarity, a blurred image display effect, and distorted color images.

[0066] Accordingly, the imaging device 10 of this embodiment can initially magnify the image, and the photoelectric conversion device 31 can transmit the image to the image display 32, so that the magnifying lens group 33 can magnify the image again. Compared with the electronic magnification method, light is focused by a lens to form an enlarged image. The optical magnification by focusing light by the magnifying lens group 33 can well preserve the original information of the image and transmit it to the subsequent application, reduce the image distortion, improve the image clarity, and facilitate the observation of the magnified image. The magnifying lens group 33 can be connected to the imaging device 10 by a cable. The size of the magnifying lens group 33 does not affect the operator's operation of the magnifying lens group 33 by holding it. Therefore, the magnifying lens group 33 can be set to a larger diameter, which can achieve high resolution and large magnification of the image.

[0067] In some embodiments, the magnifying lens group 33 includes a bi-telecentric lens.

[0068] The object-side chief ray and the image-side chief ray of the bi-telecentric lens are parallel or nearly parallel to the optical axis of the bi-telecentric lens.

[0069] It can be understood that the magnifying lens group 33 can transmit the light vertically to the second image sensor 34 .

[0070] Traditional optical magnification methods are mostly microscope magnification. When the object surface is large, the microscope magnification system needs to be designed with a smaller numerical aperture to ensure the depth of field. However, a small numerical aperture will cause image blur and distortion, resulting in imaging distortion.

[0071] Accordingly, the imaging lens group 12 of the embodiment of the present application includes a double telecentric lens, which can achieve smooth magnification of the image based on the low-aberration, high-resolution image received by the second image sensor 34.

[0072] In some embodiments, please refer to Figures 15 to 17 The magnifying lens group 33 includes a first meniscus lens 331, a first doublet lens 332, a first aperture 333, a second doublet lens 334, a third doublet lens 335, a second meniscus lens 336, a third meniscus lens 337, a fourth meniscus lens 338, and a fifth meniscus lens 339, which are arranged in sequence from the image display 32 to the second image sensor 34. The first meniscus lens 331 is used to converge the light transmitted from the image display 32 and transmit the light to the first doublet lens 332. The first doublet lens 332 is used to converge the light transmitted from the first meniscus lens 331 and transmit the light to the second doublet lens 334. The second doublet lens 334 is used to converge the light transmitted from the first doublet lens 332 and transmit the light to the third doublet lens 335. The third doublet lens 335 is used to converge the light transmitted from the second doublet lens 334 and transmit the light to the second meniscus lens 336. 36 is used to diverge the light transmitted by the third doublet lens 335 and transmit the light to the third meniscus lens 337. The third meniscus lens 337 is used to diverge the light transmitted by the second meniscus lens 336 and transmit the light to the fourth meniscus lens 338. The fourth meniscus lens 338 is used to converge the light transmitted by the third meniscus lens 337 and transmit the light to the fifth meniscus lens 339. The fifth meniscus lens 339 is used to converge the light transmitted by the fourth meniscus lens 338 and form parallel light. The second image sensor 34 is used to receive the parallel light emitted from the fifth meniscus lens 339.

[0073] It can be understood that the fifth concave-convex lens 339 diverges the light transmitted by the fourth concave-convex lens 338 and forms parallel light which is approximately parallel to the optical axis of the magnifying lens group 33 , and the angle between the parallel light and the optical axis of the magnifying lens group 33 is within a small range.

[0074] Each of the first doublet lens 332 , the second doublet lens 334 , and the third doublet lens 335 includes two adjacent lenses, and the curvature radii of adjacent surfaces of the two adjacent lenses are equal and the air gap is extremely small.

[0075] Optionally, when the adjacent surface curvatures of adjacent lenses are equal and the air gap is extremely small, the adjacent lenses can be connected to form a cemented lens by gluing to eliminate red-blue color difference and off-axis aberrations. For example, the second meniscus lens 336 and the third meniscus lens 337 can be provided separately or connected by gluing to form a doublet. For example, the third meniscus lens 337 and the fourth meniscus lens 338 can be provided separately or connected by gluing to form a doublet.

[0076] Optionally, the parameter values ​​of each lens in the magnifying lens group 33 can be found in Figure 16 It should be noted that Figure 16 "Surface" in the table is the serial number of each surface, arranged sequentially from the image side to the object side. Each doublet lens includes three "surfaces." "Radius of Curvature" is the spherical radius of each surface. The unit of "Radius of Curvature" is millimeters. If the surface is convex toward the image side, the "Radius of Curvature" is positive; if the surface is convex toward the object side, the "Radius of Curvature" is negative. "Infinity" means that the surface is flat. "Thickness" is the distance between the surface and the adjacent surface from the image side to the object side on the optical axis of the magnifying lens assembly 33. The unit of "Thickness" is millimeters. If the surface and the adjacent surface from the image side to the object side belong to the same lens, it indicates the thickness of the lens.

[0077] The image-facing surface of the image display 32 is flat, with a clear aperture of 6.411061 mm. The distance between the image display 32 and the first meniscus lens 331 is 5.851267 mm. The object-facing surface of the first meniscus lens 331 is convex toward the image side, with a radius of curvature of 39.93667 mm and a clear aperture of 15.23021 mm. The image-facing surface of the first meniscus lens 331 is convex toward the image side, with a radius of curvature of 12.17377 mm and a clear aperture of 18.78153 mm. The first meniscus lens 331 is made of H-ZLAF89L and has a thickness of 7.408964 mm. The distance between the first meniscus lens 331 and the first doublet lens 332 is 1.211929 mm.

[0078] For ease of description, the lens closest to the object side of the first doublet lens 332 is defined as the first object-side lens, and the lens closest to the image side of the first doublet lens 332 is defined as the first image-side lens. The first object-side lens has a surface facing the object side that is convex, a radius of curvature of 19.73364 mm, and a clear aperture of 17.2167 mm. The first object-side lens has a surface facing the image side that is convex, a radius of curvature of 8.316012 mm, and a clear aperture of 14.51238 mm. The first object-side lens is 2.5 mm thick and made of H-ZF72A. The side of the first image side lens facing the object side is convex toward the object side, with a curvature radius of 8.316012mm and a net aperture of 14.51238mm; the side of the first image side lens facing the image side is convex toward the image side, with a curvature radius of 54.49134mm and a net aperture of 14.42094mm; the thickness of the first image side lens is 5.177395mm, the material is H-LAF1, and the distance between the first image side lens and the first aperture is 6.155678mm.

[0079] The first aperture 333 is a plane, has a clear aperture of 9.663797 mm, and a distance between the first aperture 333 and the second doublet lens 334 is 1.198197 mm.

[0080] For ease of description, the lens closest to the object side of the second doublet lens 334 is defined as the second object-side lens, and the lens closest to the image side of the second doublet lens 334 is defined as the second image-side lens. The second object-side lens has a surface facing the object side that is convex, a radius of curvature of 11.63053 mm, and a clear aperture of 12.08273 mm. The second object-side lens has a surface facing the image side that is convex, a radius of curvature of 44.97196 mm, and a clear aperture of 10.9368 mm. The second object-side lens is 3.302482 mm thick and made of H-ZLAF68N. It is capable of converging light. The side of the second image side lens facing the object side is convex toward the object side, with a curvature radius of 44.97196 mm and a net aperture of 10.9368 mm; the side of the second image side lens facing the image side is convex toward the object side, with a curvature radius of 7.649842 mm and a net aperture of 8.703032 mm; the thickness of the second image side lens is 2.594789 mm, and the material is H-LAF4GT. The second image side lens can diverge light, and the distance between the second image side lens and the third doublet lens 335 is 2.364475 mm.

[0081] For ease of description, the lens closest to the object side of the third doublet lens 335 is defined as the third object-side lens, and the lens closest to the image side of the third doublet lens 335 is defined as the third image-side lens. The third object-side lens has a convex surface facing the object side, a radius of curvature of -35.54751 mm, and a clear aperture of 8.569654 mm. The third object-side lens has a convex surface facing the image side, a radius of curvature of 7.364 mm, and a clear aperture of 8.420074 mm. The third object-side lens is 2.5 mm thick and made of H-ZF4AGT. The side of the third image side lens facing the object side is convex toward the image side, with a curvature radius of 7.364mm and a net aperture of 8.420074mm; the side of the third image side lens facing the image side is convex toward the object side, with a curvature radius of 30.204mm and a net aperture of 8.214935mm; the thickness of the third image side lens is 5.451352mm, and the material is H-ZLAF68C. The distance between the third image side lens and the second concave-convex lens 336 is 4.97519mm.

[0082] The object-facing side of the second meniscus lens 336 is convex toward the image side, with a radius of curvature of 7.523588 mm and a net aperture of 8.828666 mm. The image-facing side of the second meniscus lens 336 is convex toward the image side, with a radius of curvature of 304.3156 mm and a net aperture of 13.43391 mm. The material of the second meniscus lens 336 is H-ZLAF71AGT, with a thickness of 5.000305 mm. The distance between the second meniscus lens 336 and the third meniscus lens 337 is 4.894181 mm.

[0083] The object-facing side of the third meniscus lens 337 is convex toward the image side, with a radius of curvature of 12.44502 mm and a net aperture of 16.34701 mm; the image-facing side of the third meniscus lens 337 is convex toward the image side, with a radius of curvature of 16.89214 mm and a net aperture of 23.19652 mm; the material of the third meniscus lens 337 is H-ZLAF50D, with a thickness of 5.779923 mm, and the distance between the third meniscus lens 337 and the fourth meniscus lens 338 is 5.630167 mm.

[0084] The object-facing surface of the fourth meniscus lens 338 is convex toward the image side, has a radius of curvature of 34.41025 mm, and a clear aperture of 32.12845 mm; the image-facing surface of the fourth meniscus lens 338 is convex toward the image side, has a radius of curvature of 25.71929 mm, and a clear aperture of 35.83135 mm; the fourth meniscus lens 338 is made of H-ZLAF78B and has a thickness of 6.264287 mm. The distance between the fourth meniscus lens 338 and the fifth meniscus lens 339 is 1.200683 mm.

[0085] The surface of the fifth meniscus lens 339 facing the object side is convex toward the image side, with a radius of curvature of 103.0595 mm and a net aperture of 40.62526; the surface of the fifth meniscus lens 339 facing the image side is convex toward the image side, with a radius of curvature of 38.31446 mm and a net aperture of 42.44939 mm; the material of the fifth meniscus lens 339 is H-ZLAF68B, with a thickness of 7.540739 mm, and the distance between the fifth meniscus lens 339 and the second image sensor 34 is 32.99896 mm.

[0086] The surface of the second image sensor 34 facing the object side is a flat surface, and the net aperture of the second image sensor 34 is 6.411061 mm.

[0087] The beneficial effects of the embodiments of the present application are as follows: the magnifying lens group 33 adopts the above-mentioned lens combination, and the main light rays of the object-side field of view close to the image display 32 are perpendicular or nearly perpendicular to the image display 32, so that the angle between the main light rays of the object-side field of view and the optical axis of the magnifying lens group 33 is less than or equal to 1°; the main light rays of the image-side field of view close to the second image sensor 34 are also perpendicular or nearly perpendicular to the second image sensor 34, so that the angle between the main light rays of the image-side field of view and the optical axis of the magnifying lens group 33 is less than or equal to 1°, so that the magnifying lens group 33 can form a double telecentric optical path and can smoothly magnify the image.

[0088] In some embodiments, please refer to Figure 2 The imaging device 10 includes a disposable image transmission light guide device 11 and an imaging lens group 12. The disposable image transmission light guide device 11 includes a front-end imaging device 111 and a light guide member 113; the front-end imaging device 111 is arranged on the imaging side of the light guide member 113; the light guide member 113 is arranged between the front-end imaging device 111 and the imaging lens group 12; the first image sensor 20 is arranged on the image side of the imaging lens group 12.

[0089] The front-end imaging device 111 is used to receive the light reflected by the object to be observed 50 and transmit the light to the light guide 113; the light guide 113 is used to receive the light transmitted by the front-end imaging device 111 and transmit the light to the imaging lens group 12, and the imaging lens group 12 is used to receive the light transmitted by the light guide 113 and transmit the light to the first image sensor 20.

[0090] The front-end imaging device 111 is used to receive light reflected by the object to be observed 50 and transmit an image of the object to be observed 50. Optionally, the front-end imaging device 111 includes a prism, a lens, or a lens assembly.

[0091] The light guide 113 is provided on the light-emitting side of the front imaging device 111 to receive the image transmitted by the front imaging device 111 and transmit the image to the imaging lens group 12. Optionally, the light guide 113 may include a rod lens or a rotating lens group.

[0092] The imaging lens assembly 12 can magnify the image transmitted by the light guide 113 and transmit the image to the first image sensor 20. The imaging lens assembly 12 can also transmit the image in a one-to-one ratio. Optionally, the imaging lens assembly 12 can be installed in the handle 15 of the endoscope 100.

[0093] Optionally, all components in the disposable image-transmitting light-guiding device 11 are disposable, replaceable components. Each time the endoscope 100 is used, a new disposable image-transmitting light-guiding device 11 can be connected to the imaging lens assembly 12. In other words, the disposable image-transmitting light-guiding device 11 and the imaging lens assembly 12 can be detachably connected, for example, by a detachable structure such as a bolt or a snap. After each use of the endoscope 100, the disposable image-transmitting light-guiding device 11 can be discarded.

[0094] The beneficial effects of the embodiments of the present application are as follows: the image of the object 50 to be observed can be transmitted from a confined space to the imaging lens assembly 12 via the imaging device and light guide 113; the imaging lens assembly 12 is configured to facilitate alignment and matching with the first image sensor 20, enabling the first image sensor 20 to stably capture images. The disposable image transmission and light guide device 11 is a disposable device, eliminating the need for subsequent cleaning steps, reducing contamination of the disposable image transmission and light guide device 11, and facilitating in-vivo testing.

[0095] In some embodiments, please refer to Figure 5 The front-end imaging device 111 includes a first light-incoming surface 1111, a first reflecting surface 1112 and a first light-emitting surface 1113; the first light-incoming surface 1111 and the first reflecting surface 1112 are arranged along a first direction X, the first direction X is perpendicular to the optical axis of the light guide 113, and the first light-incoming surface 1111 is used to transmit the light reflected by the object to be observed 50; the first reflecting surface 1112 is arranged at an angle to the first light-incoming surface 1111 and the first light-emitting surface 1113, and the first reflecting surface 1112 is used to reflect the light transmitted by the first light-incoming surface 1111 and reflect the light toward the light guide 113; the first light-emitting surface 1113 and the first reflecting surface 1112 are arranged along the optical axis direction of the light guide 113, and the first light-emitting surface 1113 is used to transmit the light reflected by the first reflecting surface 1112.

[0096] It can be understood that the front-end imaging device 111 may include one optical element or multiple optical elements. The first light-incoming surface 1111, the first reflecting surface 1112 and the first light-emitting surface 1113 may be arranged on one optical element or on multiple optical elements. Optionally, the front-end imaging device 111 may include a prism, and the first light-incoming surface 1111, the first reflecting surface 1112 and the first light-emitting surface 1113 may be arranged on one prism; the front-end imaging device 111 may also include two lenses and a reflector, and the first light-incoming surface 1111 and the first light-emitting surface 1113 may be arranged on two lenses respectively, and the first reflecting surface 1112 may be arranged on the reflector.

[0097] The first light-incident surface 1111 and the first reflective surface 1112 are arranged along a first direction X, that is, a first turning optical axis 1116 passing through the centers of the first light-incident surface 1111 and the first reflective surface 1112 extends along the first direction X. The first light-incident surface 1111 can receive an image of the object to be observed 50 located on a side of the first light-incident surface 1111 away from the first reflective surface 1112 along the first direction X.

[0098] The normal direction passing through the center of the first reflective surface 1112 forms an angle with the normal direction passing through the center of the first light-incoming surface 1111; the normal direction passing through the center of the first reflective surface 1112 forms an angle with the normal direction passing through the center of the first light-emitting surface 1113, so that the first reflective surface 1112 can reflect light parallel or nearly parallel to the first turning optical axis 1116 into light parallel or nearly parallel to the axis of the light guide 113. Optionally, the angle between the normal direction passing through the center of the first reflective surface 1112 and the normal direction passing through the center of the first light-incoming surface 1111 is 45°, and the angle between the normal passing through the center of the first reflective surface 1112 and the normal passing through the center of the first light-emitting surface 1113 is 45°.

[0099] The first light emitting surface 1113 and the first reflective surface 1112 are arranged along the optical axis of the light guide 113. That is, a second turning optical axis 1117 passing through the centers of the first light emitting surface 1113 and the first reflective surface 1112 extends along the optical axis of the light guide 113. The first light emitting surface 1113 is disposed between the first reflective surface 1112 and the light guide 113 to transmit light reflected from the first reflective surface 1112 to the light guide 113.

[0100] Optionally, on the side of the first light incident surface 1111 close to the object to be observed 50, the main light of each object field of view is almost parallel to the first turning optical axis 1116, and the angle between the main light of the object field of view and the first turning optical axis 1116 is greater than or equal to -0.2° and less than or equal to 0.2°.

[0101] The beneficial effects of the embodiments of the present application are as follows: the first light incident surface 1111 is arranged on one side of the optical axis of the light guide 113 along the first direction X, so as to facilitate acquisition of an image of the object to be observed 50 located on one side of the front imaging device 111 along the first direction X, and facilitate detection of the inner wall of the tubular organoid; the first reflecting surface 1112 is arranged to reflect the light transmitted by the first light incident surface 1111 to the light guide 113, so as to transmit the image of the object to be observed 50 to the imaging lens group 12.

[0102] In some embodiments, please refer to Figure 12 and Figure 13 The front-end imaging device 111 extends along the optical axis direction of the light guide 113, and the front-end imaging device 111 has a second light-incoming surface 1114 and a second light-outgoing surface 1115. The second light-incoming surface 1114 and the second light-outgoing surface 1115 are respectively arranged at the two ends of the front-end imaging device 111 along the optical axis direction of the light guide 113.

[0103] Optionally, the front-end imaging device 111 includes a cylindrical lens or the like.

[0104] A second light-emitting surface 1115 is disposed between the second light-incoming surface 1114 and the light guide 113. Both the second light-incoming surface 1114 and the second light-emitting surface 1115 are configured to transmit light reflected from the object 50. The normals of the second light-incoming surface 1114 and the second light-emitting surface 1115 are aligned with the axis of the light guide 113. Optionally, the second light-incoming surface 1114 and the second light-emitting surface 1115 may be arcuate surfaces, enabling the front-end imaging device 111 to both transmit and refract light.

[0105] Optionally, when using the endoscope 100 , the distance between the second light incident surface 1114 and the object to be observed 50 is controlled to be greater than or equal to 4 mm and less than or equal to 30 mm.

[0106] Optionally, on the side of the second light-entry surface 1114 close to the object to be observed 50, the main light of each object field of view is almost parallel to the optical axis of the front-end imaging device 111, and the angle between the main light of the object field of view and the optical axis of the front-end imaging device 111 is greater than or equal to -0.2° and less than or equal to 0.2°.

[0107] The beneficial effect of the embodiment of the present application is: the second light input surface 1114 and the second light output surface 1115 are arranged along the optical axis direction of the light guide 113, which facilitates the acquisition of the image of the object to be observed 50 located on the side of the front-end imaging device 111 along the optical axis direction of the light guide 113, and facilitates the detection of non-tubular organs.

[0108] In some embodiments, please refer to Figure 5 and Figure 6 The first light incident surface 1111 is an arc surface or a plane, the first reflecting surface 1112 is an arc surface or a plane, and the first light emitting surface 1113 is an arc surface or a plane.

[0109] When the first light incident surface 1111 and the first light emitting surface 1113 are planes, they can transmit light; when the first reflecting surface 1112 is a plane, it can reflect parallel light to the same angle.

[0110] When the first light incident surface 1111 is an arc surface, it can transmit and refract light; when the first light incident surface 1111 protrudes in a direction close to the first reflecting surface 1112, the first light incident surface 1111 can make the light reflected by the object to be observed 50 diverge in a direction away from the first turning optical axis 1116; when the first light incident surface 1111 protrudes in a direction away from the first reflecting surface 1112, the first light incident surface 1111 can make the light reflected by the object to be observed 50 converge in a direction close to the first turning optical axis 1116.

[0111] When the first reflective surface 1112 is an arc-shaped surface, it can reflect parallel light to different angles. When the first reflective surface 1112 protrudes into the front imaging device 111, the first reflective surface 1112 can cause the reflected light to diverge in a direction away from the second turning optical axis 1117. When the first reflective surface 1112 protrudes outward from the front imaging device 111, the first reflective surface 1112 can cause the reflected light to converge in a direction close to the second turning optical axis 1117. Optionally, the first reflective surface 1112 is a plane, and the angle between the normal of the first reflective surface 1112 and the optical axis of the light guide 113 is 45°.

[0112] When the first light emitting surface 1113 is a circular arc surface, it can transmit and refract light; when the first light emitting surface 1113 protrudes in a direction close to the first reflecting surface 1112, the first light emitting surface 1113 can make the light reflected by the first reflecting surface 1112 diverge in a direction away from the second turning optical axis 1117; when the first light emitting surface 1113 protrudes in a direction away from the first reflecting surface 1112, the first light emitting surface 1113 can make the light reflected by the first reflecting surface 1112 converge in a direction close to the second turning optical axis 1117.

[0113] According to the convergence or divergence of the light beam reflected by the object to be observed 50 toward the first light incident surface 1111, the first light incident surface 1111, the first reflecting surface 1112 and the first light emitting surface 1113 are set to different shapes, so that the light is converged or diverged to form a light beam that tends to be consistent with the optical axis direction of the light guide 113.

[0114] For examples, please refer to Figure 6When light reflected from the object 50 toward the first light-incoming surface 1111 gradually diverges, the first light-incoming surface 1111 is configured as a circular arc surface convex away from the first reflective surface 1112, the first reflective surface 1112 is configured as a circular arc surface convex outward from the front imaging device 111, and the first light-emitting surface 1113 is configured as a circular arc surface convex toward the first reflective surface 1112. Light reflected from the object 50, after passing through the first light-incoming surface 1111, converges toward the first turning optical axis 1116. Then, after reflecting from the first reflective surface 1112, the light converges again toward the second turning optical axis 1117. The light then passes through the first light-emitting surface 1113 and diverges away from the second turning optical axis 1117. Within the light guide 113, the light tends to align with the optical axis of the light guide 113.

[0115] For example, when light reflected from the object 50 toward the first light-incoming surface 1111 gradually converges, the first light-incoming surface 1111 is configured as an arcuate surface convex toward the first reflective surface 1112, the first reflective surface 1112 is configured as an arcuate surface convex toward the front imaging device 111, and the first light-emitting surface 1113 is configured as an arcuate surface convex away from the first reflective surface 1112. The light reflected from the object 50, after passing through the first light-incoming surface 1111, diverges in a direction away from the first turning optical axis 1116. The light refracted from the first light-incoming surface 1111 then reflects from the first reflective surface 1112 and diverges in a direction away from the second turning optical axis 1117. The light reflected from the first reflective surface 1112 then passes through the first light-emitting surface 1113 and diverges in a direction away from the second turning optical axis 1117. The light refracted from the first light-emitting surface 1113, within the light guide 113, tends to align with the optical axis of the light guide 113.

[0116] The beneficial effects of the embodiments of the present application are as follows: the first light-incoming surface 1111, the first reflecting surface 1112 and the first light-emitting surface 1113 are set as planes, which facilitates directly reflecting the parallel light beam reflected by the object to be observed 50 into a light beam that is nearly parallel to the axis of the light guide 113; setting the first light-incoming surface 1111, the first reflecting surface 1112 and the first light-emitting surface 1113 as arc surfaces can converge the divergent light beam reflected by the object to be observed 50, or diverge the convergent light beam reflected by the object to be observed 50, and can adjust a specific light beam to a light beam that is nearly parallel to the axial direction of the light guide 113, can increase the number of light rays transmitted from the light guide 113 to the imaging lens group 12, can increase the field of view angle, and increase the telecentricity of the optical path.

[0117] In some embodiments, optical glue is disposed between the front imaging device 111 and the light guide 113 , and the thickness of the optical glue ranges from 5 um to 10 um.

[0118] It is understood that the front-end imaging device 111 and the light guide 113 are spaced apart, and optical glue is filled between the front-end imaging device 111 and the light guide 113. The thickness range of the optical glue is the distance between the front-end imaging device 111 and the light guide 113. The front-end imaging device 111 and the light guide 113 are connected by optical glue. Optionally, optical glue is filled between the first light-emitting surface 1113 and the light guide 113, or between the second light-emitting surface 1115 and the light guide 113. Optionally, the thickness of the optical glue can be 5 μm, 8 μm, or 10 μm.

[0119] The beneficial effects of the embodiment of the present application are: using optical glue to conveniently connect the front-end imaging device 111 and the light guide 113 together, and the optical glue is light-transmissive, which facilitates the transmission of light between the front-end imaging device 111 and the light guide 113.

[0120] In some embodiments, the front-end imaging device 111 and the light guide 113 are an integrated structure.

[0121] It can be understood that there is no light-transmitting surface between the front-end imaging device 111 and the light-guiding member 113 , and the front-end imaging device 111 does not include the first light-emitting surface 1113 .

[0122] Optionally, the front-end imaging device 111 and the light guide member 113 are integrally formed using a process such as injection molding.

[0123] The beneficial effects of the embodiment of the present application are as follows: the front-end imaging device 111 and the light guide 113 are integrally formed, and there is no need to connect the front-end imaging device 111 and the light guide 113 , which makes manufacturing more convenient.

[0124] In some embodiments, please refer to Figure 4 and Figure 9 The imaging lens group 12 includes a first convex lens 122, a first concave lens 123, a second concave lens 124 and a second convex lens 125 arranged in sequence along its optical axis from the object side to the image side; the first convex lens 122 is used to converge the light transmitted by the light guide 113 and transmit the light to the first concave lens 123, the first concave lens 123 is used to diverge the light transmitted by the first convex lens 122 and transmit the light to the second concave lens 124, the second concave lens 124 is used to diverge the light transmitted by the first concave lens 123 and transmit the light to the second convex lens 125, the second convex lens 125 is used to converge the light transmitted by the second concave lens 124 and form parallel light, and the first image sensor 20 is used to receive the parallel light emitted from the second convex lens 125.

[0125] Optionally, a surface of the first convex lens 122 facing the object side is convex toward the object side, and a surface of the second convex lens 125 facing the image plane is convex toward the image side.

[0126] It can be understood that the second convex lens 125 converges the light transmitted by the second concave lens 124 to form parallel light that is approximately parallel to the optical axis of the imaging lens group 12, and the angle between the parallel light and the optical axis of the imaging lens group 12 is within a small range.

[0127] Optionally, the first convex lens 122 , the first concave lens 123 , the second concave lens 124 and the second convex lens 125 include plastic lenses or glass lenses.

[0128] The beneficial effects of the embodiments of the present application are as follows: the imaging lens group 12 adopts the above-mentioned lens combination to enable the imaging device 10 to have an image-side telecentric optical path, so that the angle between the main light of each image-side field of view between the second convex lens 125 and the first image sensor 20 and close to the first image sensor 20 and the optical axis of the imaging lens group 12 is greater than or equal to -0.2° and less than or equal to 0.2°, so that the main light of the image-side field of view is almost parallel to the optical axis of the imaging lens group 12, and the image can be smoothly magnified.

[0129] In some embodiments, the imaging lens group 12 includes at least one aspherical surface; the refractive index of the first convex lens 122 and the second convex lens 125 ranges from 1.49 to 1.65; and the refractive index of the first concave lens 123 and the second concave lens 124 ranges from 1.55 to 1.95.

[0130] Optionally, the image-facing side of the second convex lens 125 is an aspheric surface. For the high-order coefficients of the aspheric surface, please refer to Figure 8 : The coefficient of r^2 is 0, the coefficient of r^4 is 0.46615231, the coefficient of r^6 is 0, the coefficient of r^8 is 0, the coefficient of r^10 is 0, the coefficient of r^12 is 0, the coefficient of r^14 is 0, and the coefficient of r^16 is 0.

[0131] The beneficial effects of the embodiments of the present application are as follows: the first convex lens 122 and the second convex lens 125 of the imaging lens group 12 adopt a lower refractive index, and the first concave lens 123 and the second concave lens 124 adopt a higher refractive index. The combination of high refractive index and low refractive index can eliminate red-blue color difference and off-axis aberration.

[0132] In some embodiments, please refer to Figure 3 and Figure 4 The imaging lens group 12 further includes a protective lens 121 and an infrared filter 126 . The protective lens 121 is arranged on a side of the first convex lens 122 away from the first concave lens 123 ; the infrared filter 126 is arranged between the second convex lens 125 and the first image sensor 20 .

[0133] The protective lens 121 is used to protect the convex lens and the concave lens in the imaging lens group 12 from being damaged. Optionally, the protective lens 121 is connected to the handle 15 of the endoscope 100 to isolate the convex lens and the concave lens in the imaging lens group 12 from the outside.

[0134] The infrared filter 126 is used to filter infrared rays emitted from the second lens to the first image sensor 20. Optionally, the angle between the infrared filter 126 and the first image sensor 20 and the chief ray of each image-side field of view near the first image sensor 20 and the optical axis of the imaging lens group 12 is greater than or equal to -0.2° and less than or equal to 0.2°.

[0135] The beneficial effects of the embodiment of the present application are as follows: the protective lens 121 can separate the convex lens and concave lens in the imaging lens group 12 from the disposable image transmission and light guide device 11, thereby protecting the convex lens and concave lens in the imaging lens group 12 from damage during the disassembly and assembly of the disposable image transmission and light guide device 11. The infrared filter 126 can filter infrared rays, reducing the impact of infrared rays on the image.

[0136] In some embodiments, please refer to Figures 2 to 4 The imaging device 10 further includes a second aperture 13 disposed between the imaging lens group 12 and the light guide 113. The imaging lens group 12 further includes a filter 127 disposed between the protective lens 121 and the first convex lens 122. The filter 127 can control the amount of light and adjust the color.

[0137] Optionally, the filter 127 includes an ultraviolet filter 127, which can reduce the impact of ultraviolet rays in the atmosphere on the image.

[0138] Optionally, the parameter values ​​of each lens in the imaging device 10 can be found in Figure 7 It should be noted that Figure 7The "surface" in the figure is the serial number of each surface arranged in sequence from the object side to the image side, where serial number 2 is the first light-incoming surface 1111, serial number 4 is the first reflecting surface 1112, and serial number 6 is the first light-emitting surface 1113. "Surfaces" 3 and 5 are coordinate breakpoints, indicating that the first reflecting surface 1112 is turned at an angle. The "radius of curvature" is the spherical radius of each surface, and the unit of the "radius of curvature" is millimeters. From serial number 1 to serial number 4, if the surface is convex toward the object side, the "radius of curvature" is positive, and if the surface is convex toward the image side, the "radius of curvature" is negative; from serial number 5 to the image plane, if the surface is convex toward the object side, the "radius of curvature" is negative, and if the surface is convex toward the image side, the "radius of curvature" is positive; "infinite" means that the surface is a plane. "Thickness" is the distance between the surface and the adjacent surface from the image side to the object side on the optical axis of the imaging device 10. From numbers 1 to 4, the thickness from the object side to the image side is positive, and the thickness from the image side to the object side is negative. From numbers 5 to the image plane, the thickness from the object side to the image side is negative, and the thickness from the image side to the object side is positive. "Thickness" is expressed in millimeters. If the surface and the adjacent surface from the image side to the object side belong to the same lens, it represents the thickness of the lens. "Glass" is the material of the device on which the corresponding surface is located. E48R, K26R, and EP5000 are plastic types. The E48R plastic lens has high optical clarity and precision molding capabilities; the K26R plastic lens has high transparency, high fluidity, low birefringence, low haze, and low hygroscopicity; and the EP5000 plastic lens has excellent light transmittance, heat resistance, mechanical strength, and chemical stability.

[0139] The side of the object to be observed 50 facing the front imaging device 111 is flat and has a clear aperture of 1.550435 mm. The distance between the object to be observed 50 and the first light-incoming surface 1111 of the front imaging device 111 is 4 mm. The first light-incoming surface 1111 is convex toward the image side (first reflecting surface 1112), has a radius of curvature of 12.44858 mm, and a clear aperture of 1.794939 mm. The distance between the first light-incoming surface 1111 and the first reflecting surface 1112 is 1.1 mm. The first reflecting surface 1112 is flat and has a clear aperture of 2.535719 mm. The distance between the first reflecting surface 1112 and the first light-emitting surface 1113 is 1.5 mm. The first light-emitting surface 1113 is flat and has a clear aperture of 1.766209 mm. The distance between the first light-emitting surface 1113 and the light guide 113 is 0.02 mm. The material of the front-end imaging device 111 is E48R.

[0140] The object-facing side of the light guide 113 is flat, with a net aperture of 1.765865 mm; the image-facing side of the light guide 113 is flat, with a net aperture of 1.399978 mm; the light guide 113 is made of E48R, has a length of 32.7 mm, and a distance between the light guide 113 and the second aperture 13 is 0.2 mm.

[0141] The second aperture 13 is a plane, the net aperture of the second aperture 13 is 1.396536 mm, and the distance between the second aperture 13 and the protective lens 121 is 4.2 mm.

[0142] The side of the protective lens 121 facing the object side is flat and has a net aperture of 2.4 mm; the side of the protective lens 121 facing the image side is flat and has a net aperture of 2.4 mm; the material of the protective lens 121 is N-BK7 and has a thickness of 0.6 mm. The distance between the protective lens 121 and the filter 127 is 0.2 mm.

[0143] The filter 127 is a plane, the clear aperture of the filter 127 is 1.956938 mm, and the distance between the filter 127 and the first convex lens 122 is 0.1999367 mm.

[0144] The surface of the first convex lens 122 facing the object side is convex toward the object side, has a curvature radius of 1.672889 mm, and a net aperture of 2.4 mm; the surface of the first convex lens 122 facing the image side is convex toward the image side, has a curvature radius of 2.872571 mm, and a net aperture of 2.4 mm; the material of the first convex lens 122 is K26R, with a thickness of 0.9843793 mm, and the distance between the first convex lens 122 and the first concave lens 123 is 0.3148351 mm.

[0145] The object-side surface of the first concave lens 123 is convex toward the image side, has a radius of curvature of 1.558712 mm, and a clear aperture of 2 mm; the image-side surface of the first concave lens 123 is convex toward the image side, has a radius of curvature of 9.296908 mm, and a clear aperture of 2.4 mm; the material of the first concave lens 123 is EP5000, has a thickness of 0.4999588 mm, and the distance between the first concave lens 123 and the second concave lens 124 is 2.203409 mm.

[0146] The object-side surface of the second concave lens 124 is convex toward the image side, has a radius of curvature of 16.6465 mm, and a net aperture of 1.2 mm; the image-side surface of the second concave lens 124 is convex toward the object side, has a radius of curvature of 0.3804097 mm, and a net aperture of 0.6 mm; the material of the second concave lens 124 is EP5000, has a thickness of 0.4999985 mm, and the distance between the second concave lens 124 and the second convex lens 125 is 0.3148351 mm.

[0147] The side of the second convex lens 125 facing the object side is convex toward the image side, with a curvature radius of 1.105022 mm and a net aperture of 0.8 mm; the side of the second convex lens 125 facing the image side is convex toward the image side, with a curvature radius of 0.8333165 mm, a net aperture of 1.6 mm, and a cone coefficient of 2.497126; the material of the second convex lens 125 is EP5000, with a thickness of 1.179615 mm, and the distance between the second convex lens 125 and the infrared filter 126 is 1.193128 mm.

[0148] The infrared filter 126 has a flat surface facing the object side and a clear aperture of 1.6 mm. The infrared filter 126 also has a flat surface facing the image side and a clear aperture of 1.6 mm. The infrared filter 126 is made of N-BK7 and has a thickness of 0.21 mm. The distance between the infrared filter 126 and the first image sensor 20 is 0.4 mm. The first image sensor 20 has a flat surface facing the object side and a clear aperture of 6.9917051 mm.

[0149] In some embodiments, please refer to Figures 2 to 4 The extension direction of the light guide 113 is consistent with the arrangement direction of the light guide 113 and the front-end imaging device 111. The light guide 113 is used to transmit the main light with an angle a with its optical axis, and a is greater than or equal to -0.5° and less than or equal to 0.5°.

[0150] The light guide 113 is a column extending in a straight line. When the angle between the light and the optical axis of the light guide 113 is less than -0.5° or greater than 0.5°, the light cannot be transmitted from one end to the other end of the light guide 113. Optionally, the light guide 113 is a square column or a cylinder.

[0151] The beneficial effects of the present embodiment are as follows: Compared to multiple rotating mirrors, the straight-line extension of light guide 113 facilitates installation and positioning. Light guide 113 can transmit light approximately parallel to imaging lens assembly 12. The combination of light guide 113 and imaging lens assembly 12 enables imaging device 10 to form a dual telecentric optical path, enabling smooth image magnification.

[0152] In some embodiments, please refer to Figures 2 to 4 , the optical axis of the imaging lens group 12 coincides with the optical axis of the light guide 113.

[0153] The beneficial effects of the embodiments of the present application are as follows: the handle 15 of the endoscope 100 extends in the same direction as the light guide 113, the optical axis of the imaging lens group 12 coincides with the optical axis of the light guide 113, the imaging lens group 12 can be installed in the handle 15 of the endoscope 100, and the overall volume of the endoscope 100 can be reduced.

[0154] In some embodiments, please refer to Figure 14The optical axis of the imaging lens group 12 is set at an angle to the optical axis of the light guide 113, and a turning prism 14 is set between the imaging lens group 12 and the light guide 113. The turning prism 14 has a second reflecting surface 141, and the second reflecting surface 141 is set at an angle to the optical axis of the light guide 113. The second reflecting surface 141 is set at an angle to the optical axis of the imaging lens group 12. The turning prism 14 is used to reflect the light transmitted by the light guide 113 toward the imaging lens group 12.

[0155] The second reflective surface 141 of the turning prism 14 is a plane. The angle between the second reflective surface 141 and the optical axis of the imaging lens group 12 is equal to the angle between the second reflective surface 141 and the optical axis of the light guide 113. The second reflective surface 141 is capable of reflecting light parallel to the optical axis of the light guide 113 to be parallel to the optical axis of the imaging lens group 12. Optionally, the turning prism 14 includes a total reflection prism, etc. Optionally, the angle between the second reflective surface 141 and the optical axis of the imaging lens group 12 is 45°, and the angle between the second reflective surface 141 and the optical axis of the light guide 113 is 45°, so that the optical axis of the imaging lens group 12 is perpendicular to the optical axis of the light guide 113.

[0156] The beneficial effects of the embodiments of the present application are as follows: setting the turning prism 14 can turn the light path, and can flexibly set the position of the imaging lens group 12 on the handle 15 of the endoscope 100. Compared with setting the imaging lens group 12 in the handle 15 of the endoscope 100, it can avoid the diameter of the imaging lens group 12 being too large to affect the size of the handle 15, and facilitate operation.

[0157] In some embodiments, please refer to Figure 2 and Figure 3 The disposable image transmission and light guiding device 11 includes an auxiliary light source 112. The auxiliary light source 112 is arranged on a side of the front imaging device 111 close to the object to be observed 50. The auxiliary light source 112 is used to provide illumination.

[0158] The auxiliary light source 112 is used to directly illuminate the object to be observed 50. The auxiliary light source 112 can be arranged around the first light-incoming surface 1111 or around the second light-incoming surface 1114. Optionally, the auxiliary light source 112 can include one or more chip LEDs (light-emitting diodes).

[0159] The beneficial effects of the embodiment of the present application are as follows: the auxiliary light source 112 can provide illumination, and can make the image of the object to be observed 50 clearer.

[0160] In some embodiments, please refer to Figure 10 and Figure 11The endoscope 100 includes an illumination assembly 40, which includes a main light source 41 and a dichroic prism 42; the main light source 41 is arranged on the side of the dichroic prism 42 along the optical axis of the vertical light guide 113, and the main light source 41 is used to emit light to the dichroic prism 42; the dichroic prism 42 is arranged along the optical axis direction of the light guide 113 on the side of the imaging lens group 12 and the light guide 113 away from the front-end imaging device 111, and the dichroic prism 42 is used to reflect the light emitted by the main light source 41 to the light guide 113, and the dichroic prism 42 is also used to transmit the light emitted from the light guide 113 to the dichroic prism 42.

[0161] The main light source 41 can emit a light beam with a center line perpendicular to the optical axis of the light guide 113 toward the beam splitter prism 42 .

[0162] The beam splitter prism 42 is capable of reflecting light perpendicular to the optical axis of the light guide 113 in a direction parallel to the optical axis of the light guide 113. The beam splitter prism 42 reflects light emitted by the main light source 41 into the light guide 113, allowing the illumination light to be transmitted through the light guide 113 and the front-end imaging device 111 to the object to be observed 50, coupling the illumination light path into the imaging light path to achieve coaxial coupling and confocal illumination. Optionally, the beam splitter prism 42 includes a 50 / 50 beam splitter prism 42 or a polarization beam splitter prism 42. Optionally, the first light-incoming surface 1111 of the front-end imaging device 111 is convex toward the object to be observed 50 to converge the illumination light.

[0163] Optionally, a collimating lens 43 is provided between the main light source 41 and the beam splitter prism 42, and the collimating lens 43 is used to collimate the light beam emitted by the main light source 41 into a parallel light beam; the collimating lens 43 includes a plano-convex lens, a concave-convex lens or a total reflection lens; one or more collimating lenses 43 can be provided.

[0164] The beneficial effects of the embodiment of the present application are as follows: the beam splitter prism 42 can reflect the light emitted by the main light source 41 into the light guide 113, so that the illumination light can be transmitted to the object to be observed 50 through the light guide 113, and the illumination light path is coupled into the imaging light path. Compared with using two light paths to transmit the illumination light and the imaging light respectively, the imaging light path and the illumination light path share the same light path, which makes the size of the disposable image transmission light guide device 11 smaller, making it convenient to place the disposable image transmission light guide device 11 in a small space.

[0165] In some embodiments, please refer to Figure 2 The disposable image transmission light guide device 11 also includes a shell member 114 extending along the length direction of the light guide member 113. The light guide member 113 and the front-end imaging device 111 are arranged in the shell member 114. The disposable image transmission light guide device 11 is detachably connected to the imaging lens group 12; the light guide member 113 and the shell member 114 are connected by double injection molding.

[0166] The housing 114 supports and protects the light guide 113 and the front imaging device 111. Optionally, the housing 114 can be connected to the imaging lens assembly 12 via a threaded or snap-fit ​​connection, facilitating assembly and disassembly. Optionally, both the housing 114 and the imaging lens assembly 12 are connected to the handle 15 of the endoscope 100, with the housing 114 being detachably connected to the imaging lens assembly 12 via the handle 15.

[0167] The housing 114 and the light guide 113 can be injection molded in the same mold, and can be connected and fixed simultaneously during the injection molding process.

[0168] Optionally, the auxiliary light source 112 is fixedly connected to the outer shell 114 .

[0169] The advantageous effects of the embodiment of the present application are as follows: the disposable image transmission and light guide device 11 can be integrally connected to the imaging lens assembly 12 via the housing 114, facilitating assembly and disassembly of the disposable image transmission and light guide device 11. The housing 114 and the light guide 113 are connected together during injection molding, resulting in low assembly difficulty, high assembly precision, and low manufacturing difficulty.

[0170] In some embodiments, please refer to Figure 2 The disposable image transmission light guide device 11 also includes a shell member 114 extending along the length direction of the light guide member 113. The light guide member 113 and the front-end imaging device 111 are arranged in the shell member 114. The disposable image transmission light guide device 11 and the imaging lens group 12 are detachably connected; the light guide member 113 and the shell member 114 are interference fit.

[0171] It can be understood that the light guide 113 and the outer shell 114 can be formed separately, and the light guide 113 can be inserted into the outer shell 114 and interference fit with the outer shell 114 .

[0172] The beneficial effects of the embodiment of the present application are as follows: the light guide member 113 and the outer shell member 114 are interference fit, and the light guide member 113 and the outer shell member 114 can be produced and molded separately, and the production method is more flexible.

[0173] In some embodiments, please refer to Figure 18 The endoscope 100 includes two magnifying devices 30, which are a first magnifying device 35 and a second magnifying device 36. The photoelectric conversion device 31 in the first magnifying device 35 is electrically connected to the first image sensor 20; the photoelectric conversion device 31 in the second magnifying device 36 is electrically connected to the second image sensor 34 in the first magnifying device 35.

[0174] An input end of the photoelectric conversion device 31 in the first amplifying device 35 is electrically connected to the first image sensor 20 , and an output end of the photoelectric conversion device 31 in the first amplifying device 35 is electrically connected to the image display 32 in the first amplifying device 35 .

[0175] The input end of the photoelectric conversion device 31 in the second amplifying device 36 is electrically connected to the second image sensor 34 in the first amplifying device 35 , and the output end of the photoelectric conversion device 31 in the second amplifying device 36 is electrically connected to the image display 32 in the second amplifying device 36 .

[0176] The working process of the first amplifying device 35 and the second amplifying device 36 is as follows: the photoelectric conversion device 31 in the first amplifying device 35 converts the image captured by the first image sensor 20 into an electrical signal, and transmits the electrical signal to the image display 32 in the first amplifying device 35; the image display 32 in the first amplifying device 35 displays the image according to the electrical signal transmitted by the photoelectric conversion device 31, and emits light to the magnifying lens group 33 in the first amplifying device 35. The magnifying lens group 33 in the first amplifying device 35 amplifies the image displayed by the image display 32 and transmits it to the second image sensor 34. The second image sensor 34 in the first amplifying device 35 captures the image pixels transmitted by the magnifying lens group 33. The photoelectric conversion device 31 in the second amplifying device 36 converts the image captured by the second image sensor 34 in the first amplifying device 35 into an electrical signal, and transmits the electrical signal to the image display 32 in the second amplifying device 36; the image display 32 in the second amplifying device 36 displays the image according to the electrical signal transmitted by the photoelectric conversion device 31, and emits light to the magnifying lens group 33 in the second amplifying device 36. The magnifying lens group 33 in the second amplifying device 36 amplifies the image displayed on the image display 32 and transmits it to the second image sensor 34. The second image sensor 34 in the second amplifying device 36 captures the image pixels transmitted by the magnifying lens group 33; the image captured by the final second image sensor 34 is transmitted to the external display screen, and the image can be observed.

[0177] The beneficial effects of the embodiment of the present application are as follows: the imaging device 10, the first amplifying device 35 and the second amplifying device 36 can perform three-level amplification on the image, making the image clearer.

[0178] In some embodiments, the endoscope 100 includes at least three magnification devices 30 .

[0179] It can be understood that three amplifying devices 30 can be provided, or more than three can be provided.

[0180] The connection mode between adjacent amplifying devices 30 is the same as the connection mode between the first amplifying device 35 and the second amplifying device 36 .

[0181] The beneficial effects of the embodiment of the present application are as follows: the multiple magnification devices 30 can perform multi-level magnification on the image, which can make the image have less distortion and increase the image magnification factor.

[0182] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An endoscope, characterized in that: include: an imaging device for transmitting images; a first image sensor, disposed on the image side of the imaging device, the first image sensor being configured to receive light transmitted by the imaging device and capture an image; An amplifying device, the amplifying device comprising a photoelectric conversion device, an image display, a second image sensor, and a magnifying lens group; the photoelectric conversion device is electrically connected to the first image sensor and the image display, the photoelectric conversion device is used to convert the image captured by the first image sensor into an electrical signal and transmit it to the image display, the image display is used to receive the electrical signal transmitted by the photoelectric conversion device and display the image; the image display is arranged on the object side of the magnifying lens group, the second image sensor is arranged on the image side of the magnifying lens group, the magnifying lens group is used to amplify the image displayed on the image display and project the amplified image onto the second image sensor.

2. The endoscope according to claim 1, wherein The magnifying lens group includes a double telecentric lens.

3. The endoscope according to claim 2, wherein: The magnifying lens group includes a first meniscus lens, a first doublet lens, a first aperture, a second doublet lens, a third doublet lens, a second meniscus lens, a third meniscus lens, a fourth meniscus lens, and a fifth meniscus lens, which are arranged in sequence from the image display to the second image sensor; The first meniscus lens is used to converge the light transmitted by the image display and transmit the light to the first doublet lens, the first doublet lens is used to converge the light transmitted by the first meniscus lens and transmit the light to the second doublet lens, the second doublet lens is used to converge the light transmitted by the first doublet lens and transmit the light to the third doublet lens, the third doublet lens is used to converge the light transmitted by the second doublet lens and transmit the light to the second meniscus lens, the second meniscus lens is used to diverge the light transmitted by the third doublet lens and transmit the light to the third meniscus lens, the third meniscus lens is used to diverge the light transmitted by the second meniscus lens and transmit the light to the fourth meniscus lens, the fourth meniscus lens is used to converge the light transmitted by the third meniscus lens and transmit the light to the fifth meniscus lens, the fifth meniscus lens is used to converge the light transmitted by the fourth meniscus lens and form parallel light, and the second image sensor is used to receive the parallel light emitted from the fifth meniscus lens.

4. The endoscope according to claim 1, wherein The imaging device includes a disposable image transmission and light guide device and an imaging lens group. The disposable image transmission and light guide device includes a front-end imaging device and a light guide member. The front-end imaging device is arranged on the imaging side of the light guide member. The light guide is provided between the front-end imaging device and the imaging lens group; the first image sensor is provided on the image side of the imaging lens group; The front-end imaging device is used to receive the light reflected by the object to be observed and transmit the light to the light guide; the light guide is used to receive the light transmitted by the front-end imaging device and transmit the light to the imaging lens group, and the imaging lens group is used to receive the light transmitted by the light guide and transmit the light to the first image sensor.

5. The endoscope according to claim 4, wherein: The front-end imaging device includes a first light-incoming surface, a first reflecting surface, and a first light-emitting surface; the first light-incoming surface and the first reflecting surface are arranged along a first direction, the first direction is perpendicular to the optical axis of the light guide, and the first light-incoming surface is used to transmit the light reflected by the object to be observed; the first reflecting surface is arranged at an angle to the first light-incoming surface and the first light-emitting surface, and the first reflecting surface is used to reflect the light transmitted by the first light-incoming surface and reflect the light toward the light guide; the first light-emitting surface and the first reflecting surface are arranged along the optical axis direction of the light guide, and the first light-emitting surface is used to transmit the light reflected by the first reflecting surface; Alternatively, the front-end imaging device extends along the optical axis direction of the light guide member, and the front-end imaging device has a second light input surface and a second light output surface, and the second light input surface and the second light output surface are respectively arranged at both ends of the front-end imaging device along the optical axis direction of the light guide member.

6. The endoscope according to claim 5, wherein: The first light incident surface is an arc surface or a plane, the first reflecting surface is an arc surface or a plane, and the first light emitting surface is an arc surface or a plane.

7. The endoscope according to claim 4, wherein: Optical glue is provided between the front-end imaging device and the light guide, and the thickness of the optical glue ranges from 5um to 10um; Alternatively, the front-end imaging device and the light guide member are an integrated structure.

8. The endoscope according to claim 4, wherein: The imaging lens group includes a first convex lens, a first concave lens, a second concave lens and a second convex lens arranged in sequence from the object side to the image side along the optical axis direction; The first convex lens is used to converge the light transmitted by the light guide and transmit the light to the first concave lens, the first concave lens is used to diverge the light transmitted by the first convex lens and transmit the light to the second concave lens, the second concave lens is used to diverge the light transmitted by the first concave lens and transmit the light to the second convex lens, the second convex lens is used to converge the light transmitted by the second concave lens and form parallel light, and the first image sensor is used to receive the parallel light emitted from the second convex lens.

9. The endoscope according to claim 8, wherein: The imaging lens group includes at least one aspherical surface; the refractive index of the first convex lens and the second convex lens is in the range of 1.49-1.65; the refractive index of the first concave lens and the second concave lens is in the range of 1.55-1.

95.

10. The endoscope according to claim 8, wherein The imaging lens group further includes a protective lens and an infrared filter. The protective lens is arranged on a side of the first convex lens away from the first concave lens; the infrared filter is arranged between the second convex lens and the first image sensor.

11. The endoscope according to claim 4, wherein The extension direction of the light guide is consistent with the arrangement direction of the light guide and the front-end imaging device. The light guide is used to transmit the main light with an angle a with its optical axis, and a is greater than or equal to -0.5° and less than or equal to 0.5°.

12. The endoscope according to claim 4, wherein The optical axis of the imaging lens group coincides with the optical axis of the light guide member; Alternatively, the optical axis of the imaging lens group is set at an angle to the optical axis of the light guide, and a turning prism is arranged between the imaging lens group and the light guide, and the turning prism has a second reflecting surface, and the second reflecting surface is set at an angle to the optical axis of the light guide, and the second reflecting surface is set at an angle to the optical axis of the imaging lens group, and the turning prism is used to reflect the light transmitted by the light guide toward the imaging lens group.

13. The endoscope according to claim 4, wherein: The disposable image transmission and light guiding device includes an auxiliary light source, which is arranged on a side of the front-end imaging device close to the object to be observed, and is used to provide illumination.

14. The endoscope according to any one of claims 4 to 13, wherein: The endoscope includes an illumination assembly, which includes a main light source and a dichroic prism; the main light source is arranged on a side of the dichroic prism perpendicular to the optical axis of the light guide, and the main light source is used to emit light to the dichroic prism; the dichroic prism is arranged on a side of the imaging lens group and the light guide away from the front-end imaging device along the optical axis direction of the light guide, and the dichroic prism is used to reflect the light emitted by the main light source toward the light guide, and the dichroic prism is also used to transmit the light emitted from the light guide toward the dichroic prism.

15. The endoscope according to any one of claims 4 to 13, characterized in that The disposable image transmission and light guide device further comprises a housing extending along the length direction of the light guide, the light guide and the front-end imaging device are arranged in the housing, and the disposable image transmission and light guide device is detachably connected to the imaging lens group; The light guide member is connected to the housing member by double injection molding; Alternatively, the light guide member and the housing member are interference fit.

16. The endoscope according to any one of claims 1 to 13, wherein: The endoscope comprises two magnifying devices, which are respectively a first magnifying device and a second magnifying device; The photoelectric conversion device in the first amplifying device is electrically connected to the first image sensor; The photoelectric conversion device in the second amplifying device is electrically connected to the second image sensor in the first amplifying device.

17. The endoscope according to claim 16, wherein: The endoscope comprises at least three of the magnifying devices.

Images