Endoscope fluorescent module and endoscope system

Abstract

The utility model relates to an endoscope fluorescent module which comprises a switching cavity, and the switching cavity is provided with a first channel for receiving incident light, a second channel for transmitting the incident light to an object end and a third channel for receiving reflected light of the object end and transmitting the reflected light to an image end. The endoscope fluorescent module further comprises a fixing module contained and fixedly installed in the adapter cavity, and the fixing module comprises a first fixing piece fixedly abutting against the inner wall of the adapter cavity, a dichroscope fixedly arranged on the first fixing piece and a second fixing piece fixedly installed in the third channel and connected with the first fixing piece in an abutting mode. The included angle between the dichroscope and the incident light direction is 45 degrees, so that smooth transmission of an optical path is ensured, the conditions of abnormal transmission of optical signals and breakage of the dichroscope caused by displacement of the dichroscope in use are avoided, and meanwhile, the influence on the fixing and using effects of other components is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an endoscope fluorescence module and an endoscope system. Background Art

[0002] An endoscope is a device that uses a head probe and an optical lens to inspect and treat internal human tissues. The principle of optical imaging is that light enters the human body from a light source behind the body, is reflected by the inner wall of the endoscope head, and is finally guided to the observation equipment by optical fiber.

[0003] In a traditional endoscope, the incident light enters the fluorescence module from the incident optical fiber, and is emitted to the surface of the object end after total reflection on the surface of the dichroic mirror. After reflection at the object end, the reflected light passes through the dichroic mirror to the CMOS (Complementary Metal Oxide Semiconductor). In order to prevent the dichroic mirror in the endoscope fluorescence module from slipping and other failures, the traditional technology uses a structure of two metal fixings and metal washers to fix the dichroic mirror, but such a structure may cause damage to the dichroic mirror, thereby affecting the use of the endoscope. Utility Model Content

[0004] Based on this, it is necessary to provide an endoscope fluorescence module and an endoscope system that can fix the dichroic mirror while avoiding lens damage.

[0005] In a first aspect, the present application provides an endoscope fluorescence module, the endoscope fluorescence module comprising:

[0006] The adapter cavity is provided with a first channel for receiving incident light, a second channel for transmitting the incident light to the object end, and a third channel for receiving light reflected from the object end and transmitting it to the image end. The endoscope fluorescence module also includes a fixed module accommodated and fixedly installed in the adapter cavity. The fixed module includes a first fixing member fixedly abutting against the inner wall of the adapter cavity, a dichroic mirror fixedly arranged on the first fixing member, and a second fixing member fixedly installed in the third channel and abutting against the first fixing member. The dichroic mirror forms an angle of 45° with the direction of the incident light.

[0007] In one embodiment, the first channel, the second channel, and the third channel converge at the center of the transfer cavity to form a receiving cavity, and the fixed module is received and fixedly installed in the receiving cavity.

[0008] In one embodiment, the first fixing member includes a horizontally arranged first positioning surface, a pair of second positioning surfaces extending upward from both sides of the first positioning surface, and a third positioning surface extending vertically upward from the first positioning surface close to the image end, wherein the first positioning surface is rectangular and the second positioning surface is triangular, and the first fixing member also includes a receiving groove 306 that is at an angle of 45° to the first positioning surface for supporting and fixing the dichroic mirror.

[0009] In one embodiment, the first fixing member further includes a pair of positioning angles extending from the top of the second positioning surface, and the first positioning surface, the pair of second positioning surfaces, and the pair of positioning angles respectively abut against the bottom wall, side wall, and top wall of the receiving cavity.

[0010] In one embodiment, the second fixing member is provided with at least one pair of tooling grooves.

[0011] In one embodiment, the endoscope fluorescence module also includes an excitation filter arranged on the dichroic mirror from the direction of the incident light and a fluorescence filter arranged between the dichroic mirror and the image end. The incident light is vertically incident on the excitation filter to form an incident light of 470nm~480nm. The fluorescence filter performs secondary filtering on the excitation fluorescence after passing through the dichroic mirror and forms an excitation fluorescence of 525nm±20nm.

[0012] In one embodiment, a first mounting hole is formed from bottom to top on the first positioning surface of the first fixing member, and a first cut-off surface is formed below the dichroic mirror. The excitation filter is installed in the first mounting hole and cut off at the first cut-off surface.

[0013] In one embodiment, the second fixing member forms a second mounting hole from the image end to the object end, and forms a second cut-off surface behind the dichroic mirror. The fluorescent filter is installed in the second mounting hole and cuts off at the second cut-off surface.

[0014] In a second aspect, the present application provides an endoscope system, which includes an incident light module, an objective lens module, a fluorescence module, and an imaging module. The incident light module provides incident light to the fluorescence module, and the incident light is reflected by the fluorescence module and then reaches the objective lens module. The objective lens module reflects the incident light again along the original path and returns to the fluorescence module. The incident light passes through the fluorescence module again and then reaches the imaging module.

[0015] The fluorescent modules include:

[0016] The adapter cavity is provided with a first channel for receiving incident light, a second channel for transmitting the incident light to the objective lens module, and a third channel for receiving light reflected by the objective lens module and transmitting it to the imaging module. The fluorescence module also includes a fixed module accommodated and fixedly installed in the adapter cavity. The fixed module includes a first fixing member fixedly abutting against the inner wall of the adapter cavity, a dichroic mirror fixedly arranged on the first fixing member, and a second fixing member fixedly installed in the third channel and abutting against the first fixing member. The dichroic mirror forms an angle of 45° with the direction of the incident light.

[0017] In one embodiment, the first channel, the second channel, and the third channel of the adapter cavity are fixedly connected to the incident light module, the objective lens module, and the imaging module, respectively.

[0018] The above-mentioned endoscope fluorescence module and endoscope system are composed of an endoscope fluorescence module through an adapter cavity, a fixed module and a dichroic mirror; the dichroic mirror is fixed in the adapter cavity through the fixed module, and the dichroic mirror is ensured to be at a 45° angle with the incident light, which can ensure that the vertically incident light is parallelly emitted to the object end along the second channel, and the reflected light reflected from the object end can accurately pass through the third channel to the image end, avoiding the displacement of the dichroic mirror during use and causing abnormal transmission of optical signals. The dichroic mirror is fixed between the first fixing part and the second fixing part, and is kept tilted, so that the dichroic mirror will not be subjected to a bidirectional clamping force during assembly and use, avoiding the dichroic mirror from breaking, and also avoiding affecting the fixing and use effects of other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic diagram of the optical path of an endoscope system in conventional technology;

[0020] FIG2 is a schematic diagram of the structure of an endoscope fluorescence module in an embodiment of the present invention;

[0021] FIG3 is a schematic diagram of the optical path of an endoscope fluorescence module in an embodiment of the present invention;

[0022] FIG4 is a schematic diagram of the cross-sectional structure of the switching cavity in an embodiment of the present invention;

[0023] FIG5 is a schematic structural diagram of a first fixing member in an embodiment of the present utility model;

[0024] FIG. 6 is a schematic diagram of the structure of an endoscope system in one embodiment. DETAILED DESCRIPTION

[0025] An endoscope is a medical device that integrates multiple scientific technologies. It is mainly used for the inspection and minimally invasive treatment of the internal structure of the human body. It uses a head probe and an optical lens, based on optical imaging and probe technology, and introduces a light source and a lens into the body cavity or tissue to observe the microscopic structure or diseased tissue in the living body to be tested.

[0026] The optical imaging principle of the endoscope is that light enters the human body from a light source behind the human body, is reflected by the inner wall of the endoscope, and is guided to the observation equipment through optical fiber. The optical lens of the endoscope focuses the light to form an enlarged image for the doctor to observe.

[0027] The endoscope realizes optical imaging through an internally arranged optical system, with one end of the living tissue as the front end. The optical system includes an objective lens, a relay lens group, a fluorescence module and an eyepiece which are arranged in sequence from the front end to the rear end. The objective lens is used to collect information of the living tissue to be tested and to form an image based on it, the relay lens group is used to transmit the image, the fluorescence module is used to make the incident and outgoing light propagate in the same lumen and realize filtering of specific fluorescence bands, and the eyepiece is used to amplify the image.

[0028] In the traditional endoscope structure, as shown in Figure 1, the solid line represents the optical path, and the direction of the arrow is the direction of light emission. The incident light enters the fluorescent module from the incident optical fiber from the bottom, and is emitted to the object end surface after total reflection on the surface of the dichroic mirror. After reflection, the reflected light is irradiated to the CMOS through the dichroic mirror. In order to avoid the dichroic mirror from slipping, the traditional technology uses a structure of two semi-triangular metal fixings and metal washers to fix the dichroic mirror, but in actual use, the glass mirror surface of the dichroic mirror will be broken. Once the dichroic mirror is damaged, it needs to be disassembled and replaced. These processes are relatively cumbersome and waste manpower and material resources. Therefore, a more solid endoscope fluorescent module and endoscope system are needed to solve the problem of dichroic mirror damage.

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] Referring to Figures 2 and 3, Figure 2 shows a schematic diagram of the structure of an endoscope fluorescence module in an embodiment of the utility model, and Figure 3 shows a schematic diagram of the optical path of an endoscope fluorescence module in an embodiment of the utility model. In some embodiments, the endoscope fluorescence module 100 includes a transfer cavity 200, the transfer cavity is provided with a first channel 202 for receiving incident light, a second channel 204 for transmitting the incident light to the object end, and a third channel 206 for receiving the reflected light from the object end and transmitting it to the image end. The endoscope fluorescence module also includes a fixed module accommodated and fixedly installed in the transfer cavity 200, the fixed module includes a first fixing member 300 fixedly abutting against the inner wall of the transfer cavity, a dichroic mirror 400 fixedly arranged on the first fixing member, and a second fixing member 500 fixedly installed in the third channel 206 and abutting against the first fixing member, and the dichroic mirror is at an angle of 45° with the direction of the incident light.

[0036] Specifically, the first fixing member 300 is against the inner wall of the transfer cavity, and the end of the first fixing member 300 close to the image end is against and connected with the second fixing member 500, and the second fixing member 500 is against and connected with the inner wall of the transfer cavity. The dichroic mirror 400 is located between the first fixing member 300 and the second fixing member 500, and the dichroic mirror 400 is fixed in the transfer cavity 200 by a fixing assembly, the end of the dichroic mirror 400 close to the object end is the first fixing member 300, and the end of the dichroic mirror 400 close to the image end is the second fixing member 500, and the dichroic mirror 400 forms a 45° angle with the second fixing member 500, and forms a 45° angle with the incident light.

[0037] Exemplarily, the incident light enters the adapter cavity 200 vertically through the first channel 202, irradiates the dichroic mirror 400, and is emitted from the second channel 204 of the adapter cavity to the object end after being totally reflected by the dichroic mirror 400 fixed on the fixed module. Since the surface of the object to be measured at the object end is pre-fluorescently dyed, under the excitation of the fluorescent substance, the reflected light of a specific wavelength is excited, and the reflected light is incident on the dichroic mirror again through the second channel 204. Since the wavelength band of the excited reflected light has changed, it has a certain phase difference with the wavelength band of the initial incident light. Therefore, when the reflected light excited by the object end reaches the surface of the dichroic mirror again, it passes through the dichroic mirror 400 and enters the third channel 206, and is transmitted to the back-end photoelectric conversion module.

[0038] In this embodiment, an endoscope fluorescence module is formed by a transfer cavity, a fixed module and a dichroic mirror; the dichroic mirror is fixed in the transfer cavity by the fixed module, and the dichroic mirror is ensured to be at an angle of 45° with the incident light, so that the vertically incident light can be parallelly incident along the second channel to the object end, and the reflected light reflected from the object end can be accurately transmitted through the third channel to the image end, so as to avoid the displacement of the dichroic mirror during use and cause abnormal transmission of optical signals. The dichroic mirror is fixed between the first fixing member and the second fixing member, and is kept tilted, so that the dichroic mirror will not be subjected to a bidirectional clamping force during assembly and use, so as to avoid the dichroic mirror from being broken, and also avoid affecting the fixing and use effects of other components.

[0039] Please continue to refer to Figure 2 in conjunction with Figure 4, which shows a schematic diagram of the cross-sectional structure of the adapter cavity in an embodiment of the utility model. In some embodiments, the first channel, the second channel, and the third channel converge at the center of the adapter cavity to form a receiving cavity, and the fixed module is received and fixedly installed in the receiving cavity.

[0040] Specifically, the first channel 202 is a channel for receiving incident light and is parallel to the incident light, the second channel 204 is a channel for transmitting the incident light to the object end, and the third channel 206 is a channel for receiving the reflected light from the object end and transmitting it to the image end, and the second channel 204 and the third channel 206 are perpendicular to the incident light and parallel to the reflected light. The first channel 202, the second channel 204, and the third channel 206 converge at the center of the adapter cavity 200 to form a receiving cavity, and the receiving cavity fixedly receives the first fixing member 300, the second fixing member 500, and the dichroic mirror 400.

[0041] In this embodiment, the first channel, the second channel and the third channel leading to the light path are constructed and a receiving cavity is formed to ensure the smoothness of the light path; the receiving cavity provides a placement space for the fixed module and the dichroic mirror, thereby improving the accuracy and stability of the incident light and the reflected light.

[0042] Please continue to refer to Figure 2, and in combination with Figure 5, Figure 5 shows a schematic structural diagram of the first fixing member in an embodiment of the utility model. In some embodiments, the first fixing member includes a horizontally arranged first positioning surface, a pair of second positioning surfaces extending upward from both sides of the first positioning surface, and a third positioning surface extending vertically upward from the side of the first positioning surface close to the image end, wherein the first positioning surface is rectangular and the second positioning surface is triangular, and the first fixing member also includes a receiving groove that is at an angle of 45° to the first positioning surface for carrying and fixing the dichroic mirror.

[0043] Specifically, the first fixing member 300 includes a first positioning surface 302, a second positioning surface 316 and a third positioning surface 308. The first positioning surface 302 first contacts the incident light, and the first positioning surface 302 is horizontally arranged and abuts against the bottom wall of the receiving cavity. The second positioning surface 316 extends upward from both sides of the first positioning surface 302. The second positioning surfaces 316 are arranged at opposite ends of the first fixing member 300 and abut against the side wall of the receiving cavity. The third positioning surface 308 extends vertically upward from the side of the first positioning surface 302 close to the image end, and the third positioning surface 308 is parallel to the incident light; the third positioning surface 308 is abutted against the second fixing member 500. The first fixing member 300 also includes a pair of positioning angles 310 and 312 extending from the top of the second positioning surface 316, and the pair of positioning angles abut against the top wall of the receiving cavity. Exemplarily, the first positioning surface 302 is rectangular, the second positioning surface 316 is triangular, and the first fixing member 300 further includes a receiving groove, which forms a 45° angle with the first positioning surface 302 and is used to carry the dichroic mirror 400. The dichroic mirror 400 can be snapped into the receiving groove.

[0044] In this embodiment, by setting the first positioning surface and the second positioning surface, the fixed module can be stably against the receiving cavity, and combined with the positioning angle, the fixed module can be accurately installed at a predetermined position, avoiding displacement and rotation in the receiving cavity, which leads to reduced accuracy of optical signal transmission; the third positioning surface provides position information for the installation of the second fixing part, eliminating the need for positioning processing inside the receiving cavity, thereby improving the manufacturing accuracy of the endoscope fluorescence module.

[0045] Please continue to refer to FIG. 2 . In some embodiments, the second fixing member is provided with at least one pair of tooling grooves 502 .

[0046] Specifically, the second fixing member 500 is provided with tooling grooves, which are located at two opposite ends of the second fixing member 500 , and a plurality of pairs of tooling grooves may be provided.

[0047] Exemplarily, during the assembly of the endoscope fluorescence module, the tooling groove is engaged with the tooling groove by a corresponding screwdriver, and the second fixing member 500 is tightened and fixed in the accommodating cavity by the screwdriver, and the other end of the second fixing member 500 is abutted against the third positioning surface 308 of the first fixing member 300, so that the second fixing member 500 is fixed in the adapter cavity.

[0048] In this embodiment, by providing a tooling groove, the second fixing member can be conveniently installed and fixed in the adapter cavity, so that the second fixing member can be disassembled and replaced as needed.

[0049] Please continue to refer to FIG. 2 . In some embodiments, the endoscope fluorescence module further includes an excitation filter 700 disposed on the dichroic mirror in the direction of the incident light and a fluorescence filter 600 disposed between the dichroic mirror and the image end.

[0050] Specifically, the first positioning surface 302 of the first fixing member forms a first mounting hole (not shown) from bottom to top, the first mounting hole is parallel to the first channel 202, and forms a first cut-off surface (not shown) below the dichroic mirror 400, and the excitation filter 700 is horizontally installed in the first mounting hole and cuts off at the first cut-off surface. Optionally, the excitation filter 700 can be installed by moving up and down inside the first mounting hole.

[0051] Exemplarily, the incident light vertically enters the excitation filter 700 along the first channel 202 to form incident light of 470 nm to 480 nm.

[0052] In this embodiment, the excitation filter is disposed in the first mounting hole, and the position of the excitation filter in the first mounting hole can be adjusted as needed, and the incident light is filtered by the excitation filter so that the incident light can meet the light requirements of the endoscope and improve the quality of the incident light.

[0053] Please continue to refer to Figure 2. In some embodiments, the second fixing member forms a second mounting hole (not shown) from the image end to the object end, and forms a second cut-off surface (not shown) behind the dichroic mirror 400. The fluorescent filter is installed in the second mounting hole and cuts off at the second cut-off surface.

[0054] Specifically, the second fixing member 500 is located in the receiving cavity, the outer periphery of the second fixing member 500 abuts against the receiving cavity, the end of the second fixing member 500 close to the object end abuts against the first fixing member 300, and keeps the second fixing member 500 parallel to the third channel 206. The second fixing member 500 forms a second mounting hole from the image end to the object end, and forms a second cut-off surface behind the dichroic mirror 400. The fluorescent filter 600 is parallel to the second fixing member 500 and is installed in the second mounting hole. Optionally, the second fixing member 500 is annular, and the second mounting hole and the second fixing member are concentric circles. The fluorescent filter 600 can move along the reflected light path in the first mounting hole and cut off at the end of the second cut-off surface close to the image end.

[0055] Exemplarily, the incident light vertically enters the excitation filter 700 along the first channel 202 to form an incident light of 470nm~480nm. In a specific embodiment, in order to fully reflect the incident light, a coating process is pre-performed on the surface of the dichroic mirror, so that the incident light of 470nm~480nm can be fully emitted, while the reflected light of a specific wavelength formed after excitation at the object end is fully transmitted. In order to further ensure the concentration of the reflected light band, in a specific embodiment, the fluorescent filter 600 can be used to perform secondary filtering on the fluorescence reflected by the excitation after the dichroic mirror 400 to form an excitation fluorescence of 525nm±20nm.

[0056] In this embodiment, the second fixing member is connected to the first fixing member and the receiving cavity, so that the fluorescent filter can be fixed on the second fixing member to avoid failures such as slipping of the reflective filter and allow the reflected light to pass through the second fluorescent filter, thereby further improving the imaging quality of the endoscope.

[0057] Please refer to Figures 3 and 6. Figure 6 shows a schematic structural diagram of an endoscope system in an embodiment of the utility model. In some embodiments, the endoscope system includes an incident light module, an objective lens module, a fluorescence module, and an imaging module. The incident light module provides incident light to the fluorescence module, and the incident light is reflected by the fluorescence module and then reaches the objective lens module. The objective lens module reflects the incident light again and returns to the fluorescence module along the original path. The incident light passes through the fluorescence module again and then reaches the imaging module.

[0058] Among them, the fluorescence module includes a transfer cavity, the transfer cavity is provided with a first channel for receiving incident light, a second channel for transmitting the incident light to the objective lens module, and a third channel for receiving the reflected light of the objective lens module and transmitting it to the imaging module. The fluorescence module also includes a fixed module accommodated and fixedly installed in the transfer cavity. The fixed module includes a first fixing part fixedly abutting against the inner wall of the transfer cavity, a dichroic mirror fixedly set on the first fixing part, and a second fixing part fixedly installed in the third channel and abutting against the first fixing part. The dichroic mirror forms an angle of 45° with the direction of the incident light.

[0059] Specifically, the endoscope system includes a handle 602 with a metal shell and an endoscope fluorescence module 100. The incident light passes through the incident optical fiber from bottom to top to the dichroic mirror in the endoscope fluorescence module 100, and then reaches the object end after total reflection. The reflected light reaches the dichroic mirror 400 again and enters the CMOS at the rear end of the endoscope through the dichroic mirror 400. The first channel 202, the second channel 204, and the third channel 206 of the adapter cavity 200 are fixedly connected to the incident light module, the objective lens module, and the imaging module, respectively. Exemplarily, the incident light enters the endoscope fluorescence module through the first channel 202 of the adapter cavity 200, the first fixing member 300 and the excitation filter 700 and irradiates the dichroic mirror 400, and then is reflected by the dichroic mirror 400, and is emitted from the endoscope fluorescence module through the second channel 204 of the adapter cavity and the first fixing member 300 to the living body to be tested at the object end and is reflected back to the endoscope fluorescence module, and the reflected light passes through the second channel 204 of the adapter cavity, the first fixing member 300, the dichroic mirror 400, the third channel 206 of the adapter cavity 200, the second fixing member 500 and the fluorescence filter 600 and is incident on the CMOS in the endoscope rear end magnifying glass module and the image processing module.

[0060] In this embodiment, an endoscope fluorescence module is arranged in an endoscope system, and the first channel, the second channel, and the third channel of the adapter cavity in the endoscope fluorescence module are fixedly connected to the incident light module, the objective lens module, and the imaging module, respectively, to enhance the stability of the incident light and reflected light optical paths, and improve the accuracy of light signal collection at the object and image ends and the imaging effect.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An endoscope fluorescence module, characterized in that: The endoscope fluorescence module comprises: The adapter cavity is provided with a first channel for receiving incident light, a second channel for transmitting the incident light to the object end, and a third channel for receiving light reflected from the object end and transmitting it to the image end. The endoscope fluorescence module also includes a fixed module accommodated and fixedly installed in the adapter cavity. The fixed module includes a first fixing member fixedly abutting against the inner wall of the adapter cavity, a dichroic mirror fixedly arranged on the first fixing member, and a second fixing member fixedly installed in the third channel and abutting against the first fixing member. The dichroic mirror forms an angle of 45° with the direction of the incident light.

2. The endoscope fluorescence module according to claim 1, characterized in that: The first channel, the second channel, and the third channel converge at the center of the transfer cavity to form a receiving cavity, and the fixed module is received and fixedly installed in the receiving cavity.

3. The endoscope fluorescence module according to claim 2, characterized in that: The first fixing member includes a first positioning surface arranged horizontally, a pair of second positioning surfaces extending upward from both sides of the first positioning surface, and a third positioning surface extending vertically upward from the first positioning surface close to the image end, wherein the first positioning surface is rectangular and the second positioning surface is triangular, and the first fixing member also includes a receiving groove which is at an angle of 45° to the first positioning surface for carrying and fixing the dichroic mirror.

4. The endoscope fluorescence module according to claim 3, characterized in that: The first fixing member also includes a pair of positioning angles extending from the top of the second positioning surface. The first positioning surface, the pair of second positioning surfaces, and the pair of positioning angles respectively abut against the bottom wall, the side wall, and the top wall of the receiving cavity.

5. The endoscope fluorescence module according to claim 4, characterized in that: The second fixing member is provided with at least one pair of tooling grooves.

6. The endoscope fluorescence module according to claim 4, characterized in that: The endoscope fluorescence module also includes an excitation filter arranged on the dichroic mirror in the direction of the incident light and a fluorescence filter arranged between the dichroic mirror and the image end. The incident light is vertically incident on the excitation filter to form an incident light of 470nm~480nm. The fluorescence filter performs secondary filtering on the excitation fluorescence after passing through the dichroic mirror and forms an excitation fluorescence of 525nm±20nm.

7. The endoscope fluorescence module according to claim 6, characterized in that: A first mounting hole is formed from bottom to top on the first positioning surface of the first fixing member, and a first cut-off surface is formed below the dichroic mirror. The excitation filter is installed in the first mounting hole and cut off at the first cut-off surface.

8. The endoscope fluorescence module according to claim 6, characterized in that: The second fixing member forms a second mounting hole from the image end to the object end, and forms a second cut-off surface behind the dichroic mirror. The fluorescent filter is installed in the second mounting hole and cuts off at the second cut-off surface.

9. An endoscope system, characterized in that: The endoscope system includes an incident light module, an objective lens module, a fluorescence module, and an imaging module. The incident light module provides incident light to the fluorescence module. The incident light is reflected by the fluorescence module and then reaches the objective lens module. The objective lens module reflects the incident light again and returns it to the fluorescence module. The incident light is reflected by the fluorescence module again and then reaches the imaging module. The fluorescent module comprises: The adapter cavity is provided with a first channel for receiving incident light, a second channel for transmitting the incident light to the objective lens module, and a third channel for receiving light reflected by the objective lens module and transmitting it to the imaging module. The fluorescent module also includes a fixed module accommodated and fixedly installed in the adapter cavity. The fixed module includes a first fixing member fixedly abutting against the inner wall of the adapter cavity, a dichroic mirror fixedly arranged on the first fixing member, and a second fixing member fixedly installed in the third channel and abutting against the first fixing member. The dichroic mirror forms an angle of 45° with the direction of the incident light.

10. The endoscope system according to claim 9, characterized in that: The first channel, the second channel and the third channel of the adapter cavity are fixedly connected to the incident light module, the objective lens module and the imaging module respectively.

Images