Visible light and short wave infrared fluorescence endoscopic imaging system and method

Abstract

The invention provides a visible light and short wave infrared fluorescent endoscopic imaging system and method, and belongs to the technical field of fluorescent endoscopic imaging, and the system comprises an endoscope which is used for guiding a light signal into a position needing to be checked and collecting a light signal reflected or transmitted from a target tissue; a light source; the light source adopts a multimode light source and is connected with the endoscope through an optical fiber; a camera module; the camera module is connected with the endoscope through the optical bayonet, and the camera module can receive optical signals output by the endoscope and convert the optical signals into image information; and the controller is in control connection with the light source, the camera module and the display, the camera module transmits the image information into the controller for processing, and the display displays the image information processed by the controller. By fusing the visible light imaging mode and the short wave infrared fluorescence imaging mode, surface details and deep structure information of the tissue can be captured at the same time, and the high-resolution and high-definition imaging effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of fluorescent endoscopy imaging, and in particular relates to a visible light and short-wave infrared fluorescent endoscopy imaging system and method. Background Art

[0002] In the field of medical imaging, endoscopic imaging technology has been regarded as a revolutionary diagnostic tool, providing doctors with an intuitive and non-invasive means of observation. In particular, fluorescence endoscopic imaging technology can capture and analyze fluorescence signals within tissues by irradiating biological tissues with excitation light of a specific wavelength, thereby revealing the physiological and pathological states of tissues. However, traditional fluorescence endoscopic imaging technology mainly relies on the visible light band, which to some extent limits its application in deep tissue imaging and complex biological environments.

[0003] Although visible light imaging has high resolution and intuitive image quality, it is severely affected by absorption and scattering when penetrating biological tissues, resulting in poor imaging of deep tissues. In contrast, near-infrared fluorescence imaging technology, especially the short-wave infrared band, has stronger tissue penetration and lower optical scattering, and can capture fluorescence signals in deeper tissues, thereby providing more comprehensive tissue information.

[0004] In order to give full play to the respective advantages of visible light and near-infrared fluorescence imaging, multimodal imaging technology has gradually become a research hotspot in recent years. By integrating the two imaging modes of visible light and short-wave infrared fluorescence imaging, complementary imaging can be achieved, which not only retains the high resolution and intuitiveness of visible light imaging, but also utilizes the deep tissue penetration ability of near-infrared fluorescence imaging, thereby providing more comprehensive and accurate diagnostic information.

[0005] Therefore, the present invention proposes a visible light and short-wave infrared fluorescence endoscopic imaging system and method. The method aims to solve the shortcomings of traditional fluorescence endoscopic imaging technology in deep tissue imaging, realize the complementary fusion of the two imaging modes, and improve the clarity, accuracy and comprehensiveness of the endoscopic imaging system for the target. Summary of the invention

[0006] In order to solve the above problems in the prior art, a visible light and short-wave infrared fluorescence endoscopic imaging system and method are proposed.

[0007] The technical solution of the present invention to solve the technical problem is: on the one hand, a visible light and short-wave infrared fluorescence endoscopic imaging system is proposed, comprising: Endoscope, which is used to introduce light signals into the location to be examined and collect light signals reflected or transmitted from the target tissue; Light source: The light source adopts a multi-mode light source, and the light source is connected to the endoscope through an optical fiber; The camera module is connected to the endoscope through an optical bayonet, and the camera module can receive the optical signal output by the endoscope and convert the optical signal into image information; The controller controls the connection between the light source, the camera module and the display. The camera module transmits the image information to the controller for processing, and the display displays the image information processed by the controller.

[0008] Preferably, the camera module includes a shell, one end of which is provided with a light inlet, a retaining ring is connected to the outside of the light inlet, and the retaining ring is connected to the optical mount, so that the light signal is transmitted into the camera module through the light inlet; the shell is filled with light-transmitting glass, and a short-wave infrared dichroic coating is inlaid in the light-transmitting glass, and the short-wave infrared dichroic coating is arranged obliquely with the light inlet; the short-wave infrared dichroic coating can transmit short-wave infrared light signals and reflect visible light signals; a short-wave infrared long-wave pass filter is provided at the transmission end of the short-wave infrared dichroic coating, and the short-wave infrared long-wave pass filter is fixed on the shell, and the infrared light signal is filtered by the short-wave infrared long-wave pass filter and then emitted into the short-wave infrared image sensor; a visible light short-wave pass filter is provided at the reflection end of the short-wave infrared dichroic coating, and the visible light signal is filtered by the visible light short-wave pass filter and then emitted into the visible light image sensor.

[0009] Preferably, the short-wave infrared dichroic coating is arranged at 45 degrees to the light signal entering the light inlet, so that the incoming visible light signal and short-wave infrared light signal reach the corresponding image sensor at the same time.

[0010] Preferably, the optical mount includes a connecting portion and a zoom portion, one end of the zoom portion is connected to the connecting portion, and the other end is threadedly connected to the endoscope; the zoom portion includes a tube seat, a lens is provided in the tube seat, a light signal can be injected from one end of the tube seat, and emitted from the other end after passing through the lens, and the lens can slide in the tube seat along the axial direction of the tube seat to achieve zooming; the connecting portion is detachably connected to the camera module.

[0011] Preferably, the two ends of the lens are connected to guide rods, and the corresponding inner wall of the tube seat is connected to guide blocks, and the guide blocks are provided with guide grooves, and the guide rods can slide in the guide grooves; the top of the lens is connected to the first inclined block, and the first inclined block is inclined along the axial direction; a threaded hole is provided at the top of the tube seat, and the threaded hole is connected to the focusing threaded rod, the bottom of the focusing threaded rod penetrates into the tube seat, and the bottom of the focusing threaded rod is rotatably connected to the second inclined block, and the inclined surface of the first inclined block is fitted with the inclined surface of the second inclined block; a T-shaped slot is provided on the first inclined block, and the corresponding T-shaped block is connected to the second inclined block, and the T-shaped block can slide in the T-shaped slot so that the first inclined block and the second inclined block slide along the fitted inclined surfaces.

[0012] Preferably, the connecting part includes a fixed plate, which is fixed to the end of the zoom part, and a light-transmitting hole is provided in the middle of the fixed plate; a connecting ring is rotatably connected to the light-transmitting hole, and a plurality of limit rods are provided on the fixed plate, and one end of the limit rod is rotatably connected to the fixed plate; a plurality of through grooves are provided on the corresponding connecting rings, and a sliding block is rotatably connected to the through grooves, the sliding block is hollow, the sliding block is sleeved on the limit rod, and the sliding block is slidably connected to the limit rod; the other end of the limit rod extends into the through groove, and a fixed space capable of clamping the clamping ring is formed between the end of the limit rod extending into the through groove and the fixed plate, thereby realizing connection with the camera module; a fixed block is connected to the fixed plate, a toggle block is connected to the connecting ring, and a limit spring is connected between the fixed block and the toggle block.

[0013] Preferably, the light-transmitting glass is made of quartz glass, and an anti-reflection coating is provided on the quartz glass to reduce reflection losses in the optical system and improve transmittance and optical transmission efficiency.

[0014] On the other hand, a method for using the visible light and short-wave infrared fluorescence endoscopic imaging system is provided, comprising the following steps: S1. Installation; Assemble the endoscope and the camera module, thread the endoscope and the optical bayonet, move the toggle block toward the fixed block, insert the retaining ring into the fixed space and fix it, release the toggle block, and the limit rod clamps the retaining ring under the action of the reset spring to achieve the connection between the camera module and the endoscope; S2. Fluorescent marking: inject fluorescent markers at the location where examination is required; S3 emits a light signal; the output end of the endoscope is placed at the position to be inspected, the light source is turned on by the controller, so that it emits a laser, and the laser irradiates the fluorescent marker at the inspection position to generate a light signal; S4. Transmission; the endoscope collects the light signals reflected and refracted from the inspection position, transmits them to the optical mount through the optical fiber, and focuses them through the lens in the optical mount and finally injects them into the camera module; S5. Spectroscopic processing; the camera module divides the light signal into a short-wave infrared light signal and a visible light signal through a short-wave infrared dichroic coating. The short-wave infrared light signal is transmitted and then injected into the short-wave infrared image sensor for processing. The visible light signal is reflected and then injected into the visible light image sensor for processing. S6. Display; the short-wave infrared image sensor and the visible light image sensor convert the optical signal into an electrical signal, which is then processed by the controller and displayed on the display; S7. Adjustment: The position of the lens is adjusted by rotating the focus threaded rod to ensure the clarity of the image on the display.

[0015] Compared with the prior art, the above technical solution has the following advantages or beneficial effects: 1. High-definition imaging: By integrating visible light and short-wave infrared fluorescence imaging modes, it is possible to capture both the surface details and deep structural information of tissues, achieving high-resolution and high-definition imaging effects. This is of great significance for doctors to accurately determine the location and nature of lesions during surgery or diagnosis.

[0016] 2. Enhanced diagnostic capabilities: Short-wave infrared fluorescence imaging technology has high sensitivity and specificity for certain specific biomarkers, and can more accurately identify key tissues such as tumors and blood vessels. Combined with visible light imaging, doctors can obtain more comprehensive diagnostic information and improve the accuracy and reliability of diagnosis.

[0017] 3. Convenient adjustment: The optical mount of the present invention can achieve fine-tuning zoom through the zoom part, so that the endoscopic image becomes a real image on the image sensor, ensuring the best optical performance and imaging quality; at the same time, its connecting part can not only fix the camera module, but also adapt to most imaging devices on the market, and is widely applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 It is a system diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the camera module.

[0021] Figure 3 It is a schematic diagram of the transmission of optical signals within the camera module.

[0022] Figure 4 This is a schematic diagram of the structure of the optical mount.

[0023] Figure 5 This is a diagram of the interior of the zoom unit.

[0024] Figure 6 It is a schematic diagram of the structure with the outer shell removed from the connecting part.

[0025] Figure 7 This is the system endoscopic imaging effect diagram.

[0026] Description of reference numerals: 1. Endoscope; 2. Optical bayonet; 21. Zoom unit; 211. Tube base; 212. Lens; 213. Guide rod; 214. Guide block; 215. Guide groove; 216. Focusing threaded rod; 217. Second inclined block; 218. First inclined block; 219. T-shaped groove; 220. T-shaped block; 22. Connecting unit; 221. Fixing plate; 222. Connecting ring; 223. Light-transmitting hole; 224. Through groove; 225. Limit rod; 226. Slider; 227. Toggle block; 228, fixed block; 229, fixed space; 230, limit spring; 231, shell; 232, toggle slot; 3, camera module; 31, shell; 32, short-wave infrared long-wave pass filter; 33, short-wave infrared image sensor; 34, light-transmitting glass; 35, short-wave infrared dichroic coating; 36, visible light short-wave pass filter; 37, visible light image sensor; 38, light inlet; 4, light source; 5, optical fiber; 6, controller; 7, display. DETAILED DESCRIPTION

[0027] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in combination with the accompanying drawings. The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. The present invention omits the description of known components and processing technologies and processes to avoid unnecessary limitations on the present invention. The orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 the present invention. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] This system can be used in medical, endoscopic diagnosis and other fields, including but not limited to the following applications: (1) Digestive system diagnosis: In the diagnosis of digestive tract diseases, the use of a fusion visible light and short-wave infrared fluorescence endoscopy imaging system can simultaneously observe the morphology of the digestive tract mucosa and the distribution of fluorescent markers, thereby improving the accuracy and efficiency of lesion detection; (2) Tumor detection: In tumor diagnosis, by injecting fluorescent markers into the patient's body, the fusion imaging system can be used to observe the location, size, and boundaries of the tumor in real time, providing accurate navigation for surgery; (3) Vascular imaging: In the diagnosis of vascular diseases, the fusion imaging system can clearly display the morphology of blood vessels and blood flow conditions, and at the same time use fluorescent markers to detect lesions within the blood vessels, such as plaques, stenosis, etc.

[0029] Embodiment 1: See also Figure 1-Figure 6 In view of the technical difficulties existing in the existing endoscopic imaging technology in realizing synchronous imaging of visible light and short-wave infrared fluorescence, and in simultaneously fusing the two imaging modes for comprehensive analysis, a visible light and short-wave infrared fluorescence endoscopic imaging system is provided, including: an endoscope 1, which is used to introduce optical signals into a position to be inspected and collect optical signals reflected or transmitted from a target tissue; a light source 4; the light source 4 adopts a multimode light source 4, and the light source 4 is connected to the endoscope 1 through an optical fiber 5; a camera module 3; the camera module 3 is connected to the endoscope 1 through an optical bayonet 2, and the camera module 3 can receive the optical signal output by the endoscope 1 and convert the optical signal into image information; a controller 6, the controller 6 controls the connection between the light source 4, the camera module 3 and the display 7, the camera module 3 transmits the image information to the controller 6 for processing, and the display 7 displays the image information processed by the controller 6.

[0030] In this embodiment, the camera module 3 includes a shell 31, one end of the shell 31 is provided with a light inlet 38, the outer side of the light inlet 38 is connected to a retaining ring, and the retaining ring is connected to the optical mount 2, so that the optical signal is transmitted into the camera module 3 through the light inlet 38; the shell 31 is filled with a light-transmitting glass 34, in this embodiment, the light-transmitting glass 34 is made of quartz glass, and an anti-reflection coating is provided on the quartz glass to reduce the reflection loss in the optical system and improve the transmittance and optical transmission efficiency; a short-wave infrared dichroic coating 35 is inlaid in the light-transmitting glass 34, and the short-wave infrared dichroic coating 35 is tilted with the light inlet 38; the short-wave infrared The external dichroic coating 35 can transmit short-wave infrared light signals and reflect visible light signals; a short-wave infrared long-wave pass filter 32 is provided at the transmission end of the short-wave infrared dichroic coating 35, and the short-wave infrared long-wave pass filter 32 is fixed on the housing 31. The infrared light signal is filtered by the short-wave infrared long-wave pass filter 32 and then emitted into the short-wave infrared image sensor 33; a visible light short-wave pass filter 36 is provided at the reflection end of the short-wave infrared dichroic coating 35, and the visible light short-wave pass filter 36 is fixed on the housing 31. The visible light signal is filtered by the visible light short-wave pass filter 36 and then emitted into the visible light image sensor 37.

[0031] The short-wave infrared dichroic coating 35 and the light signal entering the light inlet 38 are set at 45 degrees, so that the incoming visible light signal and short-wave infrared light signal reach the corresponding image sensor at the same time. The light signal is split at the short-wave infrared dichroic coating 35, and the visible light signal enters the visible light image sensor 37 through dichroic light splitting reflection. Similarly, the short-wave infrared signal enters the short-wave infrared image sensor 33 through dichroic light splitting transmission. In this module, the travel distances of the two optical signals remain equal, that is, fdn=fdv, to ensure the synchronous acquisition of the short-wave infrared spectrum fluorescence image signal and the high-definition visible light image.

[0032] Embodiment 2: See also Figure 1-Figure 6 , the other parts are the same as those of the first embodiment, except that: the optical mount 2 includes a connecting portion 22 and a zoom portion 21, one end of the zoom portion 21 is connected to the connecting portion 22, and the other end is threadedly connected to the endoscope 1; the zoom portion 21 includes a tube seat 211, and a lens 212 is arranged in the tube seat 211. The optical signal can be injected from one end of the tube seat 211 and emitted from the other end after passing through the lens 212. The lens 212 can slide in the tube seat 211 along the axial direction of the tube seat 211 to achieve zooming; the connecting portion 22 is detachably connected to the camera module 3.

[0033] Among them, the two ends of the lens 212 are connected to the guide rod 213, and the inner wall of the corresponding tube seat 211 is connected to the guide block 214. The guide block 214 is provided with a guide groove 215, and the guide rod 213 can slide in the guide groove 215; the top of the lens 212 is connected to the first inclined block 218, and the first inclined block 218 is inclined along the axial direction; a threaded hole is provided at the top of the tube seat 211, and the threaded inner thread of the threaded hole is connected to the focusing threaded rod 216, and the bottom of the focusing threaded rod 216 penetrates into the tube seat 211, and the bottom of the focusing threaded rod 216 is rotatably connected to the second inclined block 217, and the inclined surface of the first inclined block 218 is in contact with the inclined surface of the second inclined block 217; a T-shaped groove 219 is provided on the first inclined block 218, and the corresponding second inclined block 217 is connected with a T-shaped block 220, and the T-shaped block 220 can slide in the T-shaped groove 219 so that the first inclined block 218 and the second inclined block 217 slide along the in contacting inclined surfaces. When the focusing threaded rod 216 is rotated, the second inclined block 217 moves up and down following the focusing threaded rod 216 , and the first inclined block 218 moves axially under the pressure of the second inclined block 217 to perform focusing.

[0034] In addition, in the present embodiment, the connecting portion 22 includes a fixing plate 221, the fixing plate 221 is fixed to the end of the zoom portion 21, and a light-transmitting hole 223 is provided in the middle of the fixing plate 221; the light-transmitting hole 223 is rotatably connected to a connecting ring 222, a plurality of limiting rods 225 are provided on the fixing plate 221, and one end of the limiting rod 225 is rotatably connected to the fixing plate 221; a plurality of through grooves 224 are provided on the corresponding connecting ring 222, and a sliding block 226 is rotatably connected to the through groove 224, the sliding block 226 is hollow, the sliding block 226 is sleeved on the limiting rod 225, and the sliding block 226 is slidably connected to the limiting rod 225; the limiting The other end of the positioning rod 225 extends into the through slot 224, and a fixed space 229 is formed between one end of the limiting rod 225 extending into the through slot 224 and the fixing plate 221, in which the snap ring can be clamped, thereby realizing connection with the camera module 3; the fixing plate 221 is connected to a fixing block 228, the connecting ring 222 is connected to a toggle block 227, and a limiting spring 230 is connected between the fixing block 228 and the toggle block 227; a shell 231 can be installed outside the entire connecting part 22, and a toggle groove 232 is provided on the shell 231, and the toggle block 227 can slide in the toggle groove 232, so that the connecting part 22 is an integrated structure.

[0035] By moving the toggle block 227 toward the fixed block 228, the toggle block 227 drives the connecting ring 222 to rotate, causing the end of the limiting rod 225 to retract outward. At this time, the retaining ring can be extended into the fixed space 229, and then the toggle block 227 is released, and the end of the limiting rod 225 is extended again to fix the camera module 3.

[0036] Embodiment three: Please refer to 1- Figure 7 In this embodiment, a method for using the visible light and short-wave infrared fluorescence endoscopy imaging system described in the second embodiment is proposed, comprising the following steps: S1. Installation; Assemble the endoscope 1 and the camera module, thread the endoscope 1 and the optical bayonet 2, move the toggle block 227 toward the fixed block 228, insert the snap ring into the fixed space 229 and fix it, release the toggle block 227, and the limit rod 225 clamps the snap ring under the action of the reset spring to achieve the connection between the camera module and the endoscope 1; S2. Fluorescent marking: inject fluorescent markers at the location where examination is required; S3 emits a light signal; the output end of the endoscope 1 is placed at a position to be inspected, the light source 4 is turned on by the controller 6, so that it emits a laser, and the laser irradiates the fluorescent marker at the inspection position to generate a light signal; S4 transmission; the endoscope 1 collects the light signal reflected and refracted from the inspection position, transmits it to the optical mount 2 through the optical fiber 5, and focuses through the lens 212 in the optical mount 2 and finally injects it into the camera module; S5. Spectroscopic processing; the camera module divides the light signal into a short-wave infrared light signal and a visible light signal through a short-wave infrared dichroic coating 35. After the short-wave infrared light signal is transmitted, it is incident on the short-wave infrared image sensor 33 for processing, and after the visible light signal is reflected, it is incident on the visible light image sensor 37 for processing; S6 display; short-wave infrared image sensor 33 and visible light image sensor 37 convert the optical signal into an electrical signal, which is processed by controller 6 and then displayed on display 7; S7. Adjustment; the position of the lens 212 is adjusted by rotating the focusing threaded rod 216 to ensure the clarity of the image on the display 7.

[0037] like Figure 7 The figure shows the system imaging effect diagram provided by this embodiment; the effect diagram clearly shows the actual application effect of the patent technology in the field of endoscopic imaging. In the figure, three main imaging areas can be seen: visible light imaging area, short-wave infrared fluorescence imaging area and fusion imaging area.

[0038] Although the above describes the specific implementation mode of the invention in conjunction with the drawings, it is not intended to limit the scope of protection of the invention. Based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A visible light and short-wave infrared fluorescence endoscopic imaging system, characterized in that: include: An endoscope (1), the endoscope (1) is used to introduce a light signal into a location to be inspected and collect the light signal reflected or transmitted from a target tissue; Light source (4); the light source (4) is a multimode light source (4), and the light source (4) is connected to the endoscope (1) via an optical fiber (5); A camera module (3); the camera module (3) is connected to the endoscope (1) via an optical bayonet (2); the camera module (3) is capable of receiving optical signals output by the endoscope (1) and converting the optical signals into image information; A controller (6) is configured to control the connection between the light source (4), the camera module (3) and the display (7); the camera module (3) transmits image information to the controller (6) for processing; and the display (7) displays the image information processed by the controller (6).

2. A visible light and short-wave infrared fluorescence endoscopic imaging system according to claim 1, characterized in that: The camera module (3) comprises a housing (31), one end of which is provided with a light inlet (38), the outer side of the light inlet (38) being connected to a snap ring, the snap ring being connected to an optical snap mount (2), so that a light signal is transmitted into the camera module (3) through the light inlet (38); the housing (31) is filled with a light-transmitting glass (34), the light-transmitting glass (34) being inlaid with a short-wave infrared dichroic coating (35), the short-wave infrared dichroic coating (35) being arranged obliquely with respect to the light inlet (38); the short-wave infrared dichroic coating (35) is capable of transmitting short-wave infrared light signals and reflecting visible light signals; ... A short-wave infrared long-wave pass filter (32) is provided at the transmission end of the infrared dichroic coating (35), and the short-wave infrared long-wave pass filter (32) is fixed on the housing (31). The infrared light signal is filtered by the short-wave infrared long-wave pass filter (32) and then emitted into the short-wave infrared image sensor (33). A visible light short-wave pass filter (36) is provided at the reflection end of the short-wave infrared dichroic coating (35), and the visible light short-wave pass filter (36) is fixed on the housing (31). The visible light signal is filtered by the visible light short-wave pass filter (36) and then emitted into the visible light image sensor (37).

3. A visible light and short-wave infrared fluorescence endoscopic imaging system according to claim 2, characterized in that: The short-wave infrared dichroic coating (35) is arranged at 45 degrees to the light signal entering from the light inlet (38), so that the entering visible light signal and the short-wave infrared light signal reach the corresponding image sensor at the same time.

4. The visible light and short-wave infrared fluorescence endoscopic imaging system according to claim 1, characterized in that: The optical bayonet (2) comprises a connecting portion (22) and a zoom portion (21); one end of the zoom portion (21) is connected to the connecting portion (22), and the other end is threadedly connected to the endoscope (1); the zoom portion (21) comprises a tube seat (211); a lens (212) is arranged in the tube seat (211); an optical signal can be injected from one end of the tube seat (211) and emitted from the other end after passing through the lens (212); the lens (212) can slide in the tube seat (211) along the axial direction of the tube seat (211) to achieve zooming; the connecting portion (22) is detachably connected to the camera module (3).

5. A visible light and short-wave infrared fluorescence endoscopic imaging system according to claim 4, characterized in that: The two ends of the lens (212) are connected to guide rods (213), and the inner wall of the corresponding tube seat (211) is connected to guide blocks (214), and the guide blocks (214) are provided with guide grooves (215), and the guide rods (213) can slide in the guide grooves (215); the top of the lens (212) is connected to a first inclined block (218), and the first inclined block (218) is inclined along the axial direction; a threaded hole is provided at the top of the tube seat (211), and the threaded hole is threadedly connected to a focusing threaded rod (216), and the focusing threaded rod (21 6) is inserted into the tube seat (211), the bottom of the focusing threaded rod (216) is rotatably connected to the second inclined block (217), and the inclined surface of the first inclined block (218) is fitted with the inclined surface of the second inclined block (217); a T-shaped groove (219) is provided on the first inclined block (218), and a T-shaped block (220) is connected to the corresponding second inclined block (217); the T-shaped block (220) can slide in the T-shaped groove (219) so that the first inclined block (218) and the second inclined block (217) slide along the fitted inclined surfaces.

6. The visible light and short-wave infrared fluorescence endoscopic imaging system according to claim 4, characterized in that: The connecting portion (22) comprises a fixing plate (221), the fixing plate (221) being fixed to the end of the zoom portion (21), and a light-transmitting hole (223) being provided in the middle of the fixing plate (221); the light-transmitting hole (223) being rotatably connected to a connecting ring (222), a plurality of limiting rods (225) being provided on the fixing plate (221), and one end of the limiting rods (225) being rotatably connected to the fixing plate (221); a plurality of through grooves (224) being provided on the corresponding connecting ring (222), and a sliding block (226) being rotatably connected to the through grooves (224), and the sliding block (226) being hollow. The slider (226) is sleeved on the limit rod (225) and is slidably connected to the limit rod (225); the other end of the limit rod (225) extends into the through groove (224); a fixed space (229) capable of clamping the clamping ring is formed between the end of the limit rod (225) extending into the through groove (224) and the fixed plate (221), thereby realizing connection with the camera module (3); the fixed plate (221) is connected to a fixed block (228); the connecting ring (222) is connected to a toggle block (227); and a limit spring (230) is connected between the fixed block (228) and the toggle block (227).

7. The visible light and short-wave infrared fluorescence endoscopic imaging system according to claim 2, characterized in that: The light-transmitting glass (34) is made of quartz glass, and an anti-reflection coating is provided on the quartz glass to reduce reflection loss in the optical system and improve transmittance and optical transmission efficiency.

8. A method for using the visible light and short-wave infrared fluorescence endoscopic imaging system according to any one of claims 1 to 7, characterized in that The following steps are involved: S1. Installation; Assemble the endoscope (1) and the camera module, thread the endoscope (1) and the optical bayonet (2), move the toggle block (227) toward the fixed block (228), insert the retaining ring into the fixed space (229) and fix it, release the toggle block (227), and under the action of the reset spring, the limit rod (225) clamps the retaining ring to achieve the connection between the camera module and the endoscope (1); S2. Fluorescent labeling; Inject fluorescent markers at locations that require examination; S3. Emitting a light signal; placing the output end of the endoscope (1) at a position to be inspected, turning on the light source (4) through the controller (6) to emit a laser, and irradiating the fluorescent marker at the inspection position with the laser to generate a light signal; S4. Transmission; the endoscope (1) collects the light signals reflected and refracted from the inspection position, transmits them to the optical mount (2) through the optical fiber (5), and focuses them through the lens (212) in the optical mount (2) and finally injects them into the camera module; S5. Spectroscopic processing; the camera module divides the light signal into a short-wave infrared light signal and a visible light signal through a short-wave infrared dichroic coating (35); the short-wave infrared light signal is transmitted and then incident on a short-wave infrared image sensor (33) for processing; the visible light signal is reflected and then incident on a visible light image sensor (37) for processing; S6. Display; the short-wave infrared image sensor (33) and the visible light image sensor (37) convert the optical signal into an electrical signal, which is processed by the controller (6) and then displayed on the display (7); S7. Adjustment: The position of the lens (212) is adjusted by rotating the focusing threaded rod (216) to ensure the clarity of the image on the display (7).

Images