Endoscope lighting system and endoscope

Abstract

The endoscope illuminating system comprises a light source module, a beam splitter, a first light guide optical fiber and a second light guide optical fiber, the light source module is provided with a light-emitting light path, the beam splitter corresponds to the light source module and is obliquely arranged relative to the light-emitting light path, and the light source module irradiates light rays of the beam splitter along the light-emitting light path. The light transmitted by the beam splitter is coupled to the first light guide optical fiber, and the light reflected by the beam splitter is coupled to the second light guide optical fiber. By means of the light splitting characteristic of the beam splitter, transmission light coupled to the first light guide optical fiber and reflection light coupled to the second light guide optical fiber have the same spectral component, the first light guide optical fiber or the second light guide optical fiber can adopt a single optical fiber or a single optical fiber bundle, and uniform illumination of multiple illumination points is achieved. The optical fiber bundle composed of a large number of glass or silica optical fibers does not need to be divided into two groups or multiple groups to achieve multi-illumination-point illumination, so that the process can be greatly simplified, and the cost of an optical path device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to endoscope technical field especially, and it is an endoscope illumination system and endoscope. BACKGROUND

[0002] The endoscope light source can be used for providing illumination for cavity inspection. In the related art, two or more illumination points are arranged around the imaging module to achieve uniform illumination.

[0003] The current multi-illumination point light source generally adopts the scheme disclosed in patent CN112515615B, that is, the light emitted by the light source is coupled into a single fiber bundle through a dichroic mirror (also known as a dichroic mirror), and then the single fiber bundle is divided into two or more sub-fibers, one sub-fiber corresponding to one illumination point, so as to obtain double illumination points or more illumination points.

[0004] The fiber bundle of this scheme is generally formed by a large number of glass or quartz optical fiber filaments. After the glass or quartz optical fiber filaments are divided into two or more groups, two or more sub-fibers are obtained. However, the grouping process of the glass or quartz optical fiber filaments is relatively complex and the cost is relatively high. SUMMARY

[0005] The utility model embodiment provides an endoscope illumination system and endoscope to reduce the process difficulty and cost.

[0006] An endoscope illumination system comprises:

[0007] A light source module has an outgoing light path;

[0008] A beam splitter is correspondingly arranged opposite to the light source module and inclined to the outgoing light path; and

[0009] A first light guide fiber and a second light guide fiber, the light source module irradiates the light rays to the beam splitter along the outgoing light path, the light rays transmitted by the beam splitter are coupled to the first light guide fiber, and the light rays reflected by the beam splitter are coupled to the second light guide fiber.

[0010] In one of the embodiments, the endoscope illumination system comprises a first coupling mirror group and a second coupling mirror group, the first coupling mirror group is arranged between the beam splitter and the first light guide fiber and is used for coupling the light rays transmitted by the beam splitter to the first light guide fiber, and the second coupling mirror group is arranged between the beam splitter and the second light guide fiber and is used for coupling the light rays reflected by the beam splitter to the second light guide fiber.

[0011] In one of the embodiments, between the light source module and the first light guide fiber, the beam splitter is provided with at least two, and the second light guide fiber is provided with at least two and corresponds to the beam splitter one by one; the light emitted by the light source module along the light emitting path is sequentially transmitted through all the beam splitters and coupled to the first light guide fiber; the light emitted by the light source module along the light emitting path is reflected by any of the beam splitters and coupled to the corresponding second light guide fiber.

[0012] In one of the embodiments, the transmission-reflection ratio of any of the beam splitters is (n+1):1, where n is the number of the beam splitters between the corresponding beam splitter and the first light guide fiber.

[0013] In one of the embodiments, the first light guide fiber is one of a single fiber or a fiber bundle, and the second light guide fiber is one of a single fiber or a fiber bundle.

[0014] In one of the embodiments, the first light guide fiber and the second light guide fiber are both plastic optical fibers.

[0015] In one of the embodiments, the light source module includes a dichroic mirror and at least two light emitting modules, the dichroic mirror is arranged on the light emitting path and is arranged obliquely relative to the light emitting path, and the light of at least two light emitting modules is irradiated to the beam splitter after being combined by the dichroic mirror.

[0016] In one of the embodiments, the dichroic mirror is arranged more than two times along the light emitting path, the light source module includes a first light emitting module located on the light emitting path, and a second light emitting module and a third light emitting module located on the same side of the light emitting path, the second light emitting module is provided with at least one and the third light emitting module is closer to the beam splitter than the second light emitting module; each of the second light emitting modules corresponds to one of the dichroic mirrors, the third light emitting module corresponds to one of the dichroic mirrors, and the sum of the number of the second light emitting modules and the third light emitting modules is equal to the number of the dichroic mirrors, the dichroic mirror is located between the first light emitting module and the beam splitter, and the light emitted by the first light emitting module is sequentially transmitted through all the dichroic mirrors and irradiated to the beam splitter; the light emitted by the second light emitting module is reflected by the corresponding dichroic mirror and then transmitted through the dichroic mirror between the corresponding dichroic mirror and the beam splitter and irradiated to the beam splitter; the light emitted by the third light emitting module is reflected by the corresponding dichroic mirror and irradiated to the beam splitter.

[0017] In one of the embodiments, the endoscope illumination system includes any of the following schemes:

[0018] The light source module includes two different light emitting modules;

[0019] The light source module comprises at least two narrow-band light modules.

[0020] An endoscope comprises an imaging module and the endoscope illumination system as claimed in any one of the preceding claims, the first light guide fiber and the second light guide fiber being arranged around the imaging module.

[0021] The endoscope illumination system as claimed in any one of the preceding claims can be used for illumination of an endoscope, and the endoscope illumination system comprises a light source module, a beam splitter, a first light guide fiber and a second light guide fiber, the light source module having an outgoing light path, the beam splitter being arranged correspondingly to the light source module and being inclined relative to the outgoing light path, the light source module irradiating light rays along the outgoing light path to the beam splitter, the light rays transmitted by the beam splitter being coupled to the first light guide fiber, and the light rays reflected by the beam splitter being coupled to the second light guide fiber. By virtue of the light-splitting property of the beam splitter, part of the light rays irradiated to the beam splitter is reflected, and the remaining light rays are transmitted, so that the light rays irradiated to the beam splitter by the light source module can be fully utilized to avoid waste of light energy and improve illumination efficiency. Since the reflected light and the transmitted light of the beam splitter have the same spectral composition, the transmitted light coupled to the first light guide fiber has the same spectral composition as the reflected light coupled to the second light guide fiber, and the first light guide fiber or the second light guide fiber can adopt a single optical fiber or a single optical fiber bundle to realize uniform illumination of multiple illumination points, without the need to divide a large number of glass or quartz optical fiber filaments into two groups or more groups to realize multiple illumination point illumination, so that the process can be greatly simplified and the cost of the optical path device can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 FIG. 1 is a schematic diagram of an embodiment of the first embodiment of the endoscope illumination system of the present application;

[0024] Figure 2 FIG. 2 is a schematic diagram of another embodiment of the first embodiment of the endoscope illumination system of the present application;

[0025] Figure 3 FIG. 3 is a schematic diagram of the second embodiment of the endoscope illumination system of the present application;

[0026] Figure 4 FIG. 4 is a schematic diagram of the third embodiment of the endoscope illumination system of the present application;

[0027] Figure 5FIG. 4 is a schematic diagram of a fourth embodiment of an endoscopic illumination system of the present application. DETAILED DESCRIPTION

[0028] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. In the drawings, preferred embodiments of the present application are shown. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present application to those skilled in the art.

[0029] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein, the terms "vertical", "horizontal", "left", "right", and the like are merely used for the purpose of illustration.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] First Embodiment

[0032] Reference Figure 1 In the first embodiment of the present application, an endoscopic illumination system 10 is disclosed, which is used as a part of an endoscope to provide illumination during a cavity inspection. The endoscope can include an imaging module (not shown) and the endoscopic illumination system 10 as described above, and the light emitted from the endoscopic illumination system 10 can be irradiated to a physiological tissue, thereby providing an illumination source for the imaging of the imaging module.

[0033] The endoscope illumination system 10 can include a light source module 11, a beam splitter 12, a first light guide fiber 13 and a second light guide fiber 14. The light source module 11 has an outgoing light path 11a, and the beam splitter 12 is correspondingly and oppositely arranged to the outgoing light path 11a. The beam splitter 12 has a light splitting characteristic of partially reflecting the incident light and transmitting the remaining light, and the reflected light and the transmitted light have the same spectral composition. The light source module 11 irradiates the light along the outgoing light path 11a to the beam splitter 12, the light transmitted by the beam splitter 12 is coupled to the first light guide fiber 13, and the light reflected by the beam splitter 12 is coupled to the second light guide fiber 14. The first light guide fiber 13 and the second light guide fiber 14 can be arranged around the imaging module, thereby corresponding to at least two illumination points to provide uniform illumination for the imaging module.

[0034] In some embodiments, the first light guide fiber 13 is a single fiber, which can be a plastic fiber. The plastic fiber has a significant cost advantage over glass fiber and quartz fiber, which can reduce the cost of the endoscope illumination system 10. Of course, in other embodiments, the first light guide fiber 13 can also use a fiber bundle such as a glass or quartz fiber bundle, or a single glass or quartz fiber. Since there is no need to use a complex process to divide a single fiber bundle into two groups or split into three or more groups to obtain two or more illumination points, the embodiments of the present application can also reduce the process difficulty of the entire endoscope illumination system 10 and reduce the cost of the optical device.

[0035] In some embodiments, the second light guide fiber 14 is a single fiber, which can be a plastic fiber. Of course, in other embodiments, the second light guide fiber 14 can also use a fiber bundle such as a glass or quartz fiber bundle, or a single glass or quartz fiber. Since there is no need to use a complex process to divide a single fiber bundle into two groups or split into three or more groups to obtain two or more illumination points, the embodiments of the present application can also reduce the process difficulty of the entire endoscope illumination system 10 and reduce the cost of the optical device.

[0036] In the endoscope illumination system 10, the transmission-reflection ratio of the beam splitter 12 is 1:1, i.e. 50% of the light incident on the beam splitter 12 is transmitted and 50% is reflected. In this embodiment, the first light guide fiber 13 and the second light guide fiber 14 can use the same fiber, such as the same material, size and performance of the fiber.

[0037] In other embodiments, the transmission-reflection ratio of the beam splitter 12 can be other values. In this embodiment, the first light guide fiber 13 and the second light guide fiber 14 can use different fibers, such as a combination of plastic fiber and glass (or quartz) fiber, to ensure uniform illumination while reducing the cost of the device. Of course, under the condition of meeting the high temperature resistance performance and flexibility, the cost of the device using all plastic fibers can be lower.

[0038] In the scenario where the light from the light source module 11 may generate high temperature, a beam splitter 12 with a relatively large difference in transmittance and reflectance can be used, for example, the transmittance-reflection ratio is 3:1 or 4:1, that is, the transmitted light energy is significantly higher than the reflected light energy. For another example, the transmittance-reflection ratio is 1:3 or 1:5, that is, the reflected light energy is significantly higher than the transmitted light energy. In this embodiment, the high-energy portion of the light can be coupled to a glass or quartz optical fiber, and the low-energy portion of the light is coupled to a plastic optical fiber, thereby meeting the requirements of temperature resistance and avoiding the high cost of using all glass or quartz optical fiber bundles. Of course, in this embodiment, the high-energy portion of the light can also be coupled to a glass or quartz optical fiber bundle with a relatively small overall diameter to meet the requirements of temperature resistance and flexibility at the same time, and the low-energy portion of the light is coupled to a plastic optical fiber with a relatively small overall diameter, while meeting the requirements of high-temperature resistance and flexibility, improving the compactness of the overall structure and significantly reducing costs.

[0039] In other words, compared with the solution in the related art that uses glass or quartz optical fiber to split and realize multiple lighting points, in the endoscope lighting system 10 that adopts the beam splitter 12 of this solution, the transmittance and reflection ratio of the beam splitter 12 can be selected, and light-guiding optical fibers of different materials and sizes can be used to balance the temperature resistance, flexibility and cost requirements of the endoscope, thereby greatly improving the design flexibility of the endoscope lighting system 10.

[0040] Continue to refer Figure 1 The endoscope illumination system 10 may include a first coupling lens group 15 and a second coupling lens group 16. The first coupling lens group 15 is disposed between the beam splitter 12 and the first light guide fiber 13 and is used to couple the light transmitted by the beam splitter 12 to the first light guide fiber 13. The second coupling lens group 16 is disposed between the beam splitter 12 and the second light guide fiber 14 and is used to couple the light reflected by the beam splitter 12 to the second light guide fiber 14. The first coupling lens group 15 can converge the transmitted light of the beam splitter 12 to the first light guide fiber 13 and may include a single lens or a combination of two or more lenses. The second coupling lens group 16 can converge the reflected light of the beam splitter 12 to the second light guide fiber 14 and may include a single lens or a combination of two or more lenses.

[0041] Of course, reference Figure 2 In other embodiments, the coupling lens assembly 17 can be disposed between the light source module 11 and the beam splitter 12. The light converged by the coupling lens assembly 17 is then irradiated onto the beam splitter 12, then transmitted through the beam splitter 12 to the first light guide fiber 13, and then reflected by the beam splitter 12 to the second light guide fiber 14. In this embodiment, the coupling lens assembly between the beam splitter 12 and the first light guide fiber 13 can be omitted, and the coupling lens assembly between the beam splitter 12 and the second light guide fiber 14 can also be omitted to simplify the layout of the optical path and save component costs.

[0042] The above-mentioned endoscope lighting system 10 can be used for illuminating an endoscope. The endoscope lighting system 10 includes a light source module 11, a beam splitter 12, a first light guide fiber 13, and a second light guide fiber 14. The light source module 11 has a light output path 11a. The beam splitter 12 corresponds to the light source module 11 and is tilted relative to the light output path 11a. The light source module 11 irradiates the beam splitter 12 along the light output path 11a. The light transmitted by the beam splitter 12 is coupled to the first light guide fiber 13, and the light reflected by the beam splitter 12 is coupled to the second light guide fiber 14. By utilizing the light splitting characteristics of the beam splitter 12, part of the light irradiated to the beam splitter 12 is reflected, and the remaining light is transmitted. The light irradiated from the light source module 11 to the beam splitter 12 can be fully utilized to avoid wasting light energy and improve lighting efficiency. Since the reflected light and the transmitted light of the beam splitter 12 have the same spectral components, the transmitted light coupled to the first light-guiding optical fiber 13 and the reflected light coupled to the second light-guiding optical fiber 14 have the same spectral components. The first light-guiding optical fiber 13 or the second light-guiding optical fiber 14 can adopt a single plastic optical fiber or a single optical fiber bundle to achieve uniform illumination of multiple illumination points. There is no need to divide the optical fiber bundle composed of a large number of glass or quartz optical fibers into two or more groups to achieve multi-illumination point illumination. Therefore, the process can be greatly simplified and the cost of optical path components can be reduced.

[0043] Second embodiment

[0044] refer to Figure 3 In the second embodiment of the present application, an endoscope lighting system 20 is disclosed. The endoscope lighting system 20 may include a light source module 21, a beam splitter 22, a first light guide fiber 23 and a second light guide fiber 24. The light source module 21 has a light output path 21a, and the beam splitter 22 corresponds to the light source module 21 and is tilted relative to the light output path 21a. The beam splitter 22 has a spectroscopic characteristic of partially reflecting the incident light and transmitting the remaining light, and the reflected light and the transmitted light have the same spectral components. The light from the light source module 21 along the light output path 21a is irradiated to the beam splitter 22, the light transmitted by the beam splitter 22 is coupled to the first light guide fiber 23, and the light reflected by the beam splitter 22 is coupled to the second light guide fiber 24. The first light guide fiber 23 and the second light guide fiber 24 can be arranged around the imaging module, thereby corresponding to at least two illumination points, providing uniform illumination for the imaging module.

[0045] The difference from the first embodiment is that, in the second embodiment, the light source module 21 may include a dichroic mirror 211 and at least two light-emitting modules 213. The dichroic mirror 211 is arranged in the light-emitting optical path 21a and is inclined relative to the light-emitting optical path 21a. The light from the at least two light-emitting modules 213 is combined by the dichroic mirror 211 and irradiated to the beam splitter 22.

[0046] Specifically, refer to Figure 3Taking the light source module 21 as an example, which includes a dichroic mirror 211 and two light-emitting modules 213, the two light-emitting modules 213 can be named a first light-emitting module 2131 and a second light-emitting module 2133. The first light-emitting module 2131 is arranged in the extension direction of the light-emitting optical path 21a, and the second light-emitting module 2133 is arranged on one side of the light-emitting optical path 21a and corresponds to the dichroic mirror 211. The light emitted by the first light-emitting module 2131 and transmitted by the dichroic mirror 211 is combined with the light emitted by the second light-emitting module 2133 and reflected by the dichroic mirror 211. The combined light then strikes the beam splitter 22, is then transmitted by the beam splitter 22 and coupled to the first light-guiding optical fiber 23. The combined light is then reflected by the beam splitter 22 and coupled to the second light-guiding optical fiber 24.

[0047] The first light-emitting module 2131 and the second light-emitting module 2133 can be different. For example, the first light-emitting module 2131 and the second light-emitting module 2133 can be different narrowband light modules. For example, the first light-emitting module 2131 includes a violet light source (central wavelength 405-425 nm), and the second light-emitting module 2133 includes a blue light source (central wavelength 440-490 nm). The reflected light and the transmitted light of the dichroic mirror 211 have different spectra, thus acting as a filter, filtering out unwanted light, reducing interference with imaging, and achieving higher-quality endoscope illumination.

[0048] The above endoscope lighting system 20 can be used for illuminating an endoscope. The endoscope lighting system 20 includes a light source module 21, a beam splitter 22, a first light guide fiber 23, and a second light guide fiber 24. The light source module 21 has a light output path 21a. The beam splitter 22 corresponds to the light source module 21 and is tilted relative to the light output path 21a. The light source module 21 irradiates the beam splitter 22 along the light output path 21a. The light transmitted by the beam splitter 22 is coupled to the first light guide fiber 23, and the light reflected by the beam splitter 22 is coupled to the second light guide fiber 24. By utilizing the light splitting characteristics of the beam splitter 22, part of the light irradiated to the beam splitter 22 is reflected, and the remaining light is transmitted. The light irradiated from the light source module 21 to the beam splitter 22 can be fully utilized to avoid wasting light energy and improve lighting efficiency. Since the reflected light and the transmitted light of the beam splitter 22 have the same spectral components, the transmitted light coupled to the first light-guiding optical fiber 23 and the reflected light coupled to the second light-guiding optical fiber 24 have the same spectral components. The first light-guiding optical fiber 23 or the second light-guiding optical fiber 24 can adopt a single plastic optical fiber or a single optical fiber bundle to achieve uniform illumination of multiple illumination points. There is no need to divide the optical fiber bundle composed of a large number of glass or quartz optical fibers into two or more groups to achieve multi-illumination point illumination. Therefore, the process can be greatly simplified and the cost of optical path components can be reduced.

[0049] Third embodiment

[0050] Reference Figure 4 In the third embodiment of the present application, an endoscope illumination system 30 is disclosed, which can include a light source module 31, a beam splitter 32, a first light guide fiber 33 and a second light guide fiber 34. The light source module 31 has an outgoing light path 31a, and the beam splitter 32 is correspondingly and oppositely arranged with the light source module 31 and inclined to the outgoing light path 31a. The beam splitter 32 has a light splitting property of partially reflecting incident light and transmitting the remaining light, and the reflected light and the transmitted light have the same spectral composition. The light source module 31 irradiates light along the outgoing light path 31a to the beam splitter 32, the light transmitted by the beam splitter 32 is coupled to the first light guide fiber 33, and the light reflected by the beam splitter 32 is coupled to the second light guide fiber 34. The first light guide fiber 33 and the second light guide fiber 34 can be arranged around the imaging module, thereby corresponding to at least two illumination points and providing uniform illumination for the imaging module.

[0051] The difference from the second embodiment is that in the third embodiment, two or more dichroic mirrors 311 are arranged along the outgoing light path 31a, the light source module 31 includes a first light emitting module 3131 located on the outgoing light path 31a, and a second light emitting module 3133 and a third light emitting module 3135 located on the same side of the outgoing light path 31a, the second light emitting module 3133 is arranged at least one and the third light emitting module 3135 is closer to the beam splitter 32 than the second light emitting module 3133; each second light emitting module 3133 corresponds to one dichroic mirror 311, the third light emitting module 3135 corresponds to one dichroic mirror 311, and the sum of the number of the second light emitting module 3133 and the third light emitting module 3135 is equal to the number of the dichroic mirror 311, the dichroic mirror 311 is located between the first light emitting module 3131 and the beam splitter 32, and the light emitted by the first light emitting module 3131 is sequentially transmitted through all the dichroic mirrors 311 and then irradiated to the beam splitter 32; the light emitted by any second light emitting module 3133 is reflected by the corresponding dichroic mirror 311, and then transmitted through the dichroic mirror 311 between the corresponding dichroic mirror 311 and the beam splitter 32, and then irradiated to the beam splitter 32; the light emitted by the third light emitting module 3135 is reflected by the corresponding dichroic mirror 311 to the beam splitter 32.

[0052] Specifically, reference is made to Figure 4 In Figure 4In the illustrated embodiment, four dichroic mirrors 311 are spaced apart along the light output path 31a. The first light-emitting module 3131 is a violet light source (central wavelength 405-425 nm). Three second light-emitting modules 3133 are provided, parallel to the first light-emitting module 3131 and pointing toward the beam splitter 32. These are, in order, a blue light source (central wavelength 440-490 nm), a broad-spectrum green light source (central wavelength 530-550 nm), and an orange light source (central wavelength 580-610 nm). The third light source is a red light source (central wavelength 620-640 nm). Each second light-emitting module 3133 corresponds to a dichroic mirror 311, and each third light-emitting module 3135 also corresponds to a dichroic mirror 311. The total number of second light-emitting modules 3133 and third light-emitting modules 3135 is equal to the number of dichroic mirrors 311. The light emitted by the first light-emitting module 3131 is transmitted through all the dichroic mirrors 311 in sequence and then irradiates the beam splitter 32. The light emitted by the second light-emitting module 3133 is reflected by the corresponding dichroic mirror 311, and then transmitted through the dichroic mirror 311 between the corresponding dichroic mirror 311 and the beam splitter 32, and then irradiates the beam splitter 32. The light emitted by the third light source is reflected by the corresponding dichroic mirror 311 to the beam splitter 32, and then transmitted through the beam splitter 32 and coupled to the first light-guiding fiber 33, and then reflected by the beam splitter 32 and coupled to the second light-guiding fiber 34.

[0053] The above-mentioned endoscope lighting system 30 can be used for illuminating an endoscope. The endoscope lighting system 30 includes a light source module 31, a beam splitter 32, a first light guide fiber 33, and a second light guide fiber 34. The light source module 31 has a light output path 31a. The beam splitter 32 corresponds to the light source module 31 and is tilted relative to the light output path 31a. The light source module 31 irradiates the beam splitter 32 along the light output path 31a. The light transmitted by the beam splitter 32 is coupled to the first light guide fiber 33, and the light reflected by the beam splitter 32 is coupled to the second light guide fiber 34. By utilizing the light splitting characteristics of the beam splitter 32, part of the light irradiated to the beam splitter 32 is reflected, and the remaining light is transmitted. The light irradiated from the light source module 31 to the beam splitter 32 can be fully utilized to avoid wasting light energy and improve lighting efficiency. Since the reflected light and the transmitted light of the beam splitter 32 have the same spectral components, the transmitted light coupled to the first light-guiding optical fiber 33 and the reflected light coupled to the second light-guiding optical fiber 34 have the same spectral components. The first light-guiding optical fiber 33 or the second light-guiding optical fiber 34 can adopt a single plastic optical fiber or a single optical fiber bundle to achieve uniform illumination of multiple illumination points. There is no need to divide the optical fiber bundle composed of a large number of glass or quartz optical fibers into two or more groups to achieve multi-illumination point illumination. Therefore, the process can be greatly simplified and the cost of optical path components can be reduced.

[0054] Fourth embodiment

[0055] refer to Figure 5In the fourth embodiment of the present application, an endoscope lighting system 40 is disclosed. The endoscope lighting system 40 may include a light source module 41, a beam splitter 42, a first light guide fiber 43 and a second light guide fiber 44. The light source module 41 has a light output path 41a, and the beam splitter 42 corresponds to the light source module 41 and is tilted relative to the light output path 41a. The beam splitter 42 has a spectroscopic characteristic of partially reflecting the incident light and transmitting the remaining light, and the reflected light and the transmitted light have the same spectral components. The light from the light source module 41 along the light output path 41a is irradiated to the beam splitter 42, the light transmitted by the beam splitter 42 is coupled to the first light guide fiber 43, and the light reflected by the beam splitter 42 is coupled to the second light guide fiber 44. The first light guide fiber 43 and the second light guide fiber 44 can be arranged around the imaging module, thereby corresponding to at least two illumination points, providing uniform illumination for the imaging module.

[0056] The difference from the first embodiment is that, in the fourth embodiment, at least two beam splitters 42 are provided between the light source module 41 and the first light-guiding optical fiber 43, and adjacent beam splitters 42 can be arranged in parallel and at intervals. At least two second light-guiding optical fibers 44 are provided and correspond one-to-one to the beam splitters 42. The light emitted from the light source module 41 along the light-emitting optical path 41a is transmitted through all the beam splitters 42 in sequence and coupled to the first light-guiding optical fiber 43; the light emitted from the light source module 41 along the light-emitting optical path 41a is reflected by any beam splitter 42 and coupled to the corresponding second light-guiding optical fiber 44. Furthermore, the transmission-reflection ratio of any beam splitter 42 is (n+1):1, where n is the number of beam splitters 42 between the corresponding beam splitter 42 and the first light-guiding optical fiber 43, and n is a natural number.

[0057] Specifically, in Figure 5 In the illustrated embodiment, two beam splitters 42 are provided between the light source module 41 and the first light guide fiber 43, and adjacent beam splitters 42 can be arranged in parallel and at intervals. Two second light guide fibers 44 are provided and correspond one to one with the beam splitters 42. The light emitted from the light source module 41 along the light output path 41a is transmitted through all the beam splitters 42 in sequence and coupled to the first light guide fiber 43. The light emitted from the light source module 41 along the light output path 41a is reflected by any beam splitter 42 and coupled to the corresponding second light guide fiber 44. Exemplarily, the transmittance-reflection ratio of the beam splitter 42 closer to the light source module 41 is 2:1, and the transmittance-reflection ratio of the beam splitter 42 closer to the first light guide fiber 43 is 1:1, so that any second light guide fiber 44 has substantially the same illumination brightness as the first light guide fiber 43, thereby improving the uniformity of the endoscope illumination.

[0058] For example, when three beam splitters 42 are disposed between the light source module 41 and the first light guide fiber 43, the transmission-reflection ratios of the beam splitters 42 in the direction from the light source module 41 to the first light guide fiber 43 are 3:1, 2:1, and 1:1, respectively. This arrangement also ensures that any second light guide fiber 44 has substantially the same illumination brightness as the first light guide fiber 43, thereby improving the uniformity of endoscope illumination. Other embodiments are not described in detail here.

[0059] With this optical path setting, more second light-guiding optical fibers 44 can be set between the light source module 41 and the first light-guiding optical fiber 43. The first light-guiding optical fiber 43 and the multiple second light-guiding optical fibers 44 can be arranged around the imaging module of the endoscope to form more than three lighting points to achieve more uniform lighting.

[0060] The above-mentioned endoscope lighting system 40 can be used for illuminating an endoscope. The endoscope lighting system 40 includes a light source module 41, a beam splitter 42, a first light guide fiber 43, and a second light guide fiber 44. The light source module 41 has a light output path 41a. The beam splitter 42 corresponds to the light source module 41 and is tilted relative to the light output path 41a. The light source module 41 irradiates the beam splitter 42 along the light output path 41a. The light transmitted by the beam splitter 42 is coupled to the first light guide fiber 43, and the light reflected by the beam splitter 42 is coupled to the second light guide fiber 44. By utilizing the light splitting characteristics of the beam splitter 42, part of the light irradiated to the beam splitter 42 is reflected, and the remaining light is transmitted. The light irradiated from the light source module 41 to the beam splitter 42 can be fully utilized to avoid wasting light energy and improve lighting efficiency. Since the reflected light and the transmitted light of the beam splitter 42 have the same spectral components, the transmitted light coupled to the first light-guiding optical fiber 43 and the reflected light coupled to the second light-guiding optical fiber 44 have the same spectral components. The first light-guiding optical fiber 43 or the second light-guiding optical fiber 44 can adopt a single plastic optical fiber or a single optical fiber bundle to achieve uniform illumination of multiple illumination points. There is no need to divide the optical fiber bundle composed of a large number of glass or quartz optical fibers into two or more groups to achieve multi-illumination point illumination. Therefore, the process can be greatly simplified and the cost of optical path components can be reduced.

[0061] It can be understood that in this embodiment, the light source module 41 can also adopt the light source module 41 scheme of the second and third embodiments mentioned above, and the light source module 41 is not limited to the combination of the light-emitting module 213 and the dichroic mirror 311. The light source module 41 can also include a beam splitter 42 or other optical elements, which will not be repeated in this application.

[0062] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0063] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. An endoscope lighting system, characterized in that: include: The light source module has a light output path; A beam splitter, corresponding to the light source module and arranged obliquely relative to the light output path; as well as A first light-guiding optical fiber and a second light-guiding optical fiber, the light source module irradiates the light to the beam splitter along the light-emitting optical path, the light transmitted through the beam splitter is coupled to the first light-guiding optical fiber, and the light reflected through the beam splitter is coupled to the second light-guiding optical fiber.

2. The endoscope lighting system according to claim 1, characterized in that: The endoscope lighting system includes a first coupling mirror group and a second coupling mirror group. The first coupling mirror group is arranged between the beam splitter and the first light-guiding optical fiber and is used to couple the light transmitted by the beam splitter to the first light-guiding optical fiber. The second coupling mirror group is arranged between the beam splitter and the second light-guiding optical fiber and is used to couple the light reflected by the beam splitter to the second light-guiding optical fiber.

3. The endoscope lighting system according to claim 1, characterized in that: At least two beam splitters are provided between the light source module and the first light guide fiber, and at least two second light guide fibers are provided and correspond one to one with the beam splitters; light emitted from the light source module along the light output path is sequentially transmitted through all the beam splitters and then coupled to the first light guide fiber; The light emitted by the light source module along the light output path is reflected by any one of the beam splitters and then coupled to the corresponding second light guiding optical fiber.

4. The endoscope lighting system according to claim 2, characterized in that: Adjacent beam splitters are arranged in parallel and at intervals, and the transmission-reflection ratio of any beam splitter is (n+1):1, where n is the number of the beam splitters between the corresponding beam splitter and the first light-guiding optical fiber.

5. The endoscope lighting system according to claim 1, characterized in that: The first light-guiding optical fiber is a single optical fiber or an optical fiber bundle, and the second light-guiding optical fiber is a single optical fiber or an optical fiber bundle.

6. The endoscope lighting system according to claim 5, characterized in that: The first light-guiding optical fiber and the second light-guiding optical fiber are both plastic optical fibers.

7. The endoscope lighting system according to any one of claims 1 to 6, characterized in that: The light source module includes a dichroic mirror and at least two light-emitting modules. The dichroic mirror is arranged in the light-emitting path and is tilted relative to the light-emitting path. The light from at least two light-emitting modules is combined by the dichroic mirror and then irradiated to the beam splitter.

8. The endoscope lighting system according to claim 7, characterized in that: At least two dichroic mirrors are arranged at intervals along the light-emitting optical path; the light source module includes a first light-emitting module located on the light-emitting optical path, and a second light-emitting module and a third light-emitting module located on the same side of the light-emitting optical path; at least one second light-emitting module is provided, and the third light-emitting module is closer to the beam splitter than the second light-emitting module; each second light-emitting module corresponds to one dichroic mirror, and each third light-emitting module corresponds to one dichroic mirror, and the sum of the number of the second light-emitting modules and the third light-emitting modules is equal to the number of the dichroic mirrors; the dichroic mirror is located between the first light-emitting module and the beam splitter, and the light emitted by the first light-emitting module is sequentially transmitted through all the dichroic mirrors and then irradiated onto the beam splitter; The light emitted by the second light-emitting module is reflected by the corresponding dichroic mirror, and then transmitted through the dichroic mirror between the corresponding dichroic mirror and the beam splitter, and then irradiated to the beam splitter; The light emitted by the third light-emitting module is reflected by the corresponding dichroic mirror to the beam splitter.

9. The endoscope lighting system according to claim 7, characterized in that: This includes any of the following options: The light source module includes two different light-emitting modules; The light source module includes at least two narrow-band light modules.

10. An endoscope, characterized in that: It comprises an imaging module and the endoscopic lighting system according to any one of claims 1 to 9, wherein the first light-guiding optical fiber and the second light-guiding optical fiber are arranged around the imaging module.

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