Endoscope light source illuminating device

Abstract

The present application relates to a kind of endoscope light source lighting device, including light source component, light source collimation module, light combination component and optical fiber coupling module, the light beam emitted by the light source component is collimated after passing through light source collimation module, and is coupled optical fiber finally through light combination component beam combination, light source component one-way or multiple light beams are coupled output, realize the illumination output in multiple illumination modes, the multiple illumination modes include white light illumination mode, multiple narrowband light illumination mode, near-infrared light illumination mode and composite light illumination mode.The present application multi-channel illumination mode realizes narrowband or broadband spectrum composite illumination, overcome the problem that the light mode in the prior art is limited, and cannot be in white light illumination mode output with continuity spectrum high-illuminance illumination light, and solve the problem that original narrowband illumination is inefficient, not flexible, cannot meet the requirement of narrowband, broadband illumination flexible switching, meet the illumination demand of the detected part in clinical diagnosis and treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to a lighting device, in particular to a lighting device for endoscope light source in the medical field, which can realize narrow-band or wide-band spectrum composite lighting, and belongs to the technical field of optics. BACKGROUND

[0002] The endoscope light source is used to output illumination light, which is coupled into the light guide fiber of the endoscope through an optical path to illuminate the detected part in the body cavity. At the same time, the illumination light reflected by the detected part is imaged onto an imaging element through the optical system of the endoscope, and an image processing signal is generated and processed by an image processing device, and the processed image is displayed by a display device for observation; it has been widely used in clinical practice.

[0003] The traditional hard mirror endoscope uses a xenon lamp wide spectrum light source with multiple narrow-band filters. At the same time, most conventional medical diagnosis still needs to use wide-band white light illumination imaging. Traditional narrow-band illumination, wide-band illumination, and near-infrared illumination need to switch different light sources or filter out unnecessary spectrum in one light source, causing inconvenience or energy waste.

[0004] In actual application, in order to meet the needs of diagnosis, the endoscope light source is optimized and designed, in addition to using wide-band white light to observe the detected part, narrow-band illumination light is also used to observe the detected part. The penetration depth of narrow-band light wave through the organ mucosa is different, for example, the penetration depth of short wave is shallow, and the penetration depth of long wave is deep, which can reach the submucosa. Because the optical properties of blood in the mucosa are different for different wavelengths of light, the use of light waves that are difficult to diffuse and can be absorbed by blood can increase the contrast and clarity of the mucosal epithelium and submucosal blood vessels. Narrow-band imaging uses narrow-band light wave illumination to accurately observe the epithelial morphology, better help endoscopic doctors to distinguish normal and diseased tissues at different positions, thereby improving the accuracy of endoscopic diagnosis, and is used for the diagnosis of various diseases.

[0005] The existing lighting scheme in the market generally adopts a method of coupling narrow-band red light into white light through a dichroic mirror to adjust the color rendering index and R9 (saturated red) index in the white light mode, but it is difficult to realize the diversification of the light output mode. In the white light illumination mode, the spectral continuity of the endoscope light source output light is poor, and there is a significant notch at 500 nm. At the same time, the position of the white light LED is not specified in this endoscope light source. If the white light LED is placed far from the light outlet, the loss of white light is too large during white light coupling. If the white light LED is placed close to the light outlet, it is necessary to configure a double-bandpass dichroic sheet to output white light with high color rendering index and continuous spectrum, and the processing difficulty of the double-bandpass dichroic sheet is large, so that this endoscope light source is not easy to arrange and cannot meet the illumination requirements of the detected part.

[0006] Or the lighting source scheme adopts a xenon lamp wide spectrum light source, and multiple narrow-band filters are needed to cooperate with the motor to realize multiple narrow-band light output. In the composite mode, the type of composite mode is limited or the switching frame rate is slow, the energy efficiency is low, and the performance requirements of the illumination light source in the clinic cannot be met. SUMMARY

[0007] The purpose of the present application is to provide a multi-channel illumination method to realize narrow-band or wide-band spectral composite illumination of an endoscope light source illumination device, to overcome the problems of limited light output mode and inability to output high color rendering index illumination light with continuous spectrum in the white light illumination mode in the prior art, and to solve the problems of low efficiency, inflexibility and inability to meet the requirements of flexible switching between narrow-band and wide-band illumination of the original narrow-band illumination, and to meet the illumination requirements of the detected part in clinical diagnosis and treatment.

[0008] In order to achieve the above-mentioned purpose, the technical scheme of the present application is: an endoscope light source illumination device, the innovation point of which is: comprising a light source assembly, a light source collimation module, a light combination assembly and a fiber coupling module,

[0009] The light beam emitted by the light source assembly is collimated by the light source collimation module, combined by the light combination assembly, and finally coupled into the optical fiber by the fiber coupling module. One or more light beams of the light source assembly are coupled and output to realize illumination output in multiple illumination modes,

[0010] Among them,

[0011] The light source assembly comprises a white light source, a near-infrared light source and a plurality of primary color light sources, and the primary color light sources are used to emit narrow-band light or wide-band light,

[0012] The light source collimation module has a plurality of

[0013] The light combination assembly comprises a plurality of first color filters, an X prism and a second color filter,

[0014] The light path of the white light source is provided with a corresponding light source collimation module, the light path of the near-infrared light source is provided with a corresponding light source collimation module and a second color filter, the light path of each of the plurality of primary light sources is provided with a corresponding light source collimation module and a corresponding first color filter, the X prism is arranged between the plurality of first color filters and the second color filter, and the optical fiber coupling module is arranged on the light path after the light beam is combined by the light combination assembly.

[0015] The plurality of illumination modes include a white light illumination mode, a multi-narrow-band light illumination mode, a near-infrared light illumination mode, and a composite light illumination mode.

[0016] In the white light illumination mode, the light emitted by the white light source is collimated by the corresponding light source collimation module, and then output after passing through the optical fiber coupling module.

[0017] In the multi-narrow-band light illumination mode, the light emitted by at least two primary light sources is collimated by the corresponding light source collimation module, respectively, and then combined by the light combination assembly, and finally the composite light is obtained by optical path coupling through the optical fiber coupling module.

[0018] In the near-infrared light illumination mode, the light emitted by the near-infrared light source is collimated by the corresponding light source collimation module, and then output after passing through the second color filter and the optical fiber coupling module.

[0019] In the composite light illumination mode, the light emitted by the white light source and the light emitted by at least one primary light source are collimated by the corresponding light source collimation module, respectively, and then combined by the light combination assembly, and finally the composite light is obtained by optical path coupling through the optical fiber coupling module.

[0020] In the above technical solution, a coaxial beam combination assembly is further arranged between the light combination assembly and the optical fiber coupling module, the coaxial beam combination assembly includes a first reflector, a non-coherent light coaxial beam combination element, and a second reflector, the first reflector and the second reflector are symmetrically arranged along the non-coherent light coaxial beam combination element, the first reflector receives the light beam output by the light combination assembly, the second reflector receives the light beam collimated by the corresponding light source collimation module from the white light source, and the non-coherent light coaxial beam combination element receives the non-coaxial light beams reflected by the first reflector and the second reflector to realize coaxial beam combination and light mixing and project to the optical fiber coupling module.

[0021] In the above technical solution, the non-coherent light coaxial beam combination element has n inclined surfaces a, the n inclined surfaces a form a sawtooth array arranged reflection surface, the reflection surface is coated with a reflection film layer, and the reflection film layer is further coated with a protective layer to prevent oxidation.

[0022] In the above technical solution, the height of each inclined surface a is b, the angle of a single sawtooth half angle Q2 satisfies 45°<Q2≤60°, and the height b satisfies Where D is the width of the uncorrelated optical coaxial beam combiner, and the incident angle Q1 = 90° - Q2 of the out-of-axis beam incident on the uncorrelated optical coaxial beam combiner.

[0023] In the above technical solution, the light source collimation module is composed of an aspherical lens, or the light source collimation module includes a collimation module lens composed of two or three spherical lenses.

[0024] In the above technical solution, the plurality of primary color light sources include narrowband blue LEDs, narrowband green LEDs, narrowband red LEDs, narrowband blue-violet LEDs, and narrowband yellow-orange LEDs. The narrowband blue-violet LEDs and narrowband yellow-orange LEDs are arranged opposite to each other, with the narrowband blue LEDs, narrowband green LEDs, and narrowband red LEDs located on one side of the narrowband blue-violet LEDs and narrowband yellow-orange LEDs. Each LED has a collimation module in its output optical path. Two first filters and an X-prism are provided between the narrowband blue-violet LED and the narrowband yellow-orange LED. The X-prism is located between the two first filters. The two first filters are respectively arranged opposite to the collimation modules in the narrowband blue LED optical path and the narrowband red LED optical path. The X-prism is arranged opposite to the collimation module in the narrowband green LED optical path. The second color filter in the near-infrared light source optical path is also arranged opposite to the X-prism.

[0025] In the above technical solution, the fiber optic coupling module is composed of an aspherical lens, or the fiber optic coupling module is composed of a collimating module lens composed of two or three spherical lenses.

[0026] In the above technical solution, the white light source is a high color rendering index white light source with a wavelength of 400-700nm, the near-infrared light source is a laser light source or an LED light source with a half-width of 10nm, the multiple primary color light sources are LED light sources with a spectral width of no more than 30nm when emitting narrow-band light, and LED light sources with a spectral width of more than 30nm when emitting broadband light.

[0027] In the above technical solution, the peak wavelength of the narrowband blue LED is 450nm, the peak wavelength of the narrowband green LED is in the range of 525-540nm, the peak wavelength of the narrowband red LED is in the range of 625-635nm, the peak wavelength of the narrowband blue-violet LED is in the range of 405-415nm, and the peak wavelength of the narrowband yellow-orange LED is in the range of 585-610nm.

[0028] In the above technical solution, the first color filter is a short-pass bidirectional color filter or a band-pass color filter, and the second color filter is a long-pass bidirectional color filter.

[0029] The positive effects of this invention are: When using the endoscopic light source illumination device of this invention, since this invention includes a light source assembly, a light source collimation module, a light combining assembly, and an optical fiber coupling module,

[0030] The light beam emitted by the light source component is collimated by the light source collimation module, then combined by the beam combining component, and finally coupled to an optical fiber by the optical fiber coupling module. This controls the coupling and output of one or more light beams from the light source component, enabling lighting output under various lighting modes.

[0031] in,

[0032] The light source assembly includes a white light source, a near-infrared light source, and multiple primary color light sources, wherein the primary color light sources are used to emit narrowband or broadband light.

[0033] The light source collimation module has multiple components.

[0034] The light combining component includes multiple first color filters, an X-prism, and a second color filter.

[0035] The white light source emits a corresponding collimation module along its optical path; the near-infrared light source emits a corresponding collimation module and a second color filter along its optical path; the multiple primary color light sources emit corresponding collimation modules and corresponding first color filters along their optical paths; the X-prism is positioned between the multiple first and second color filters; and the fiber optic coupling module is positioned along the optical path after the light combining assembly has combined the light.

[0036] The various lighting modes include white light lighting mode, multi-narrowband light lighting mode, near-infrared light lighting mode, and composite light lighting mode.

[0037] In white light illumination mode, the light emitted by the white light source is collimated by the corresponding light source collimation module and then output after passing through the fiber optic coupling module.

[0038] In a multi-narrowband illumination mode, composite light is obtained by optical path coupling of light emitted from at least two of the primary color light sources.

[0039] In near-infrared illumination mode, the light emitted by the near-infrared light source is collimated by the corresponding light source collimation module, filtered by the second color filter, and then output after passing through the fiber optic coupling module.

[0040] In composite lighting mode, composite light is obtained by optically coupling the light emitted from the white light source with the light emitted from at least one primary color light source.

[0041] This invention achieves multiple lighting modes by independently illuminating light source components with their own control switches. The light beams are then collimated by a light source collimation component, combined through a beam combining component, and finally coupled into an optical fiber via a fiber optic coupling lens or module.

[0042] The specific implementation method is as follows: The present invention illuminates light source components with independent control switches, and after the light source collimation component collimates the light source beam into near-parallel light, the light combining component combines multiple light paths, and finally the combined beam is coupled into an optical fiber through an optical fiber coupling lens or module to complete the illumination output.

[0043] The independent control switch can quickly and accurately switch to the light source to be lit through electrical adjustment. Compared with the motor, it has a high degree of freedom and speed in switching, and can realize more composite light output of narrowband light. The light source collimation component and the fiber optic coupling component can improve the collimation of the lighting source and the coupling efficiency of the beam coupled into the fiber through the fiber coupling lens or module, so that the system lighting efficiency is higher. The system's light combining component is mainly for spatial light transmission. It can combine more light sources at the maximum while reducing the number of fiber couplings, thereby realizing multiple composite modes and more efficient lighting, and reducing unnecessary energy loss.

[0044] In summary, this invention overcomes the limitations of existing technologies in terms of light output modes and the inability to output high color rendering index (CRI) illumination light with a continuous spectrum in white light illumination mode. It also solves the problems of inefficiency and inflexibility of existing narrowband illumination, which cannot meet the requirements for flexible switching between narrowband and broadband illumination, thus satisfying the illumination needs of the tested areas in clinical diagnosis and treatment. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the principle of the first embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the principle of the second embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the coaxial bundle combining assembly of the present invention;

[0050] Figure 6 This is a schematic diagram of the structure of the incoherent optical coaxial beam combiner of the present invention. Detailed Implementation

[0051] The present invention will be further described below with reference to the accompanying drawings and the given embodiments, but is not limited thereto.

[0052] Example 1

[0053] like Figure 1 , 2 As shown, an endoscope light source illumination device includes a light source assembly 1, a light source collimation module 2, a light combining assembly 3, and an optical fiber coupling module 4.

[0054] The light beam emitted by the light source component 1 is collimated by the light source collimation module 2, then combined by the beam combining component 3, and finally coupled to an optical fiber by the optical fiber coupling module 4. This controls the coupling and output of one or more light beams from the light source component 1, enabling lighting output under various lighting modes.

[0055] in,

[0056] The light source assembly 1 includes a white light source 11, a near-infrared light source 12, and multiple primary color light sources 13. The primary color light sources 13 are used to emit narrowband light or broadband light.

[0057] The light source collimation module 2 has multiple modules.

[0058] The light combining component 3 includes multiple first color filters 31, an X-prism 32, and second color filters 33.

[0059] The white light source 11 emits a light source collimating module 2 along its optical path. The near-infrared light source 12 emits a light source collimating module 2 along its optical path and a second color filter 33. The multiple primary color light sources 13 each emit a light source collimating module 2 and a corresponding first color filter 31 along their optical paths. The X-prism 32 is positioned between the multiple first color filters 31 and second color filters 33. The fiber optic coupling module 4 is positioned along the optical path of the beam combiner 3 after beam combining.

[0060] The various lighting modes include white light lighting mode, multi-narrowband light lighting mode, near-infrared light lighting mode, and composite light lighting mode.

[0061] In white light illumination mode, the light emitted by the white light source 11 is collimated by the corresponding light source collimation module 2 and then output through the fiber optic coupling module 4. This primarily provides a high color rendering index (CRI) continuous spectrum through high CRI white LED illumination light with a CRI greater than 90, and the minimum value of the illumination light spectrum is not less than 5% of the maximum value.

[0062] In the multi-narrowband illumination mode, the light emitted by at least two of the primary color light sources 13 is collimated by the corresponding light source collimation module 2, then combined by the light combining component 3, and finally optically coupled by the fiber coupling module 4 to obtain the composite light.

[0063] In near-infrared illumination mode, the light emitted by the near-infrared light source 12 is collimated by the corresponding light source collimation module 2, then filtered by the second color filter 33, and finally output through the fiber optic coupling module 4.

[0064] In the composite light illumination mode, the light emitted by the white light source 11 and the light emitted by at least one primary color light source 13 are respectively collimated by the corresponding light source collimation module 2, and then combined by the light combining component 3, and finally optically coupled by the fiber coupling module 4 to obtain composite light.

[0065] Furthermore, in order to collimate the beams emitted from different light sources in light source assembly 1 and prevent light diffusion that could affect subsequent beam combining and coupling, such as... Figure 2 As shown, the light source collimation module 2 is composed of an aspherical lens. Of course, the structure is not limited to this. The light source collimation module 2 can also be composed of a collimation module lens consisting of two or three spherical lenses.

[0066] Furthermore, such as Figure 2 As shown, to make the structure more reasonable, the illumination of different light sources is independently controlled. The multiple primary color light sources 13 include narrowband blue LEDs, narrowband green LEDs, narrowband red LEDs, narrowband blue-violet LEDs, and narrowband yellow-orange LEDs. The narrowband blue-violet LEDs and narrowband yellow-orange LEDs are arranged opposite each other, and the narrowband blue LEDs, narrowband green LEDs, and narrowband red LEDs are located on one side of the narrowband blue-violet LEDs and narrowband yellow-orange LEDs. Each LED has a light source collimation module 2 on its output light path. Two first filters 31 and an X-prism 32 are provided between the narrow-band blue-violet LED and the narrow-band yellow-orange LED. The X-prism 32 is located between the two first filters 31. At the same time, the two first filters 31 are respectively arranged opposite to the light source collimation modules 2 on the narrow-band blue LED light path and the narrow-band red LED light path. The X-prism 32 is arranged opposite to the light source collimation module 2 on the narrow-band green LED light path. The second color filter 33 on the near-infrared light source 12 light path is also arranged opposite to the X-prism 32.

[0067] Furthermore, such as Figure 2 As shown, to couple the combined beam, the fiber coupling module 4 is composed of an aspherical lens. However, the structure is not limited to this; the fiber coupling module 4 can also be a collimating module lens consisting of two or three spherical mirrors. The advantage of this design is that it increases the coupling efficiency of the combined beam into the fiber, thereby improving the energy utilization rate of the lighting source.

[0068] Furthermore, the white light source 11 is a high color rendering index (CRI) white light source with a wavelength of 400–700 nm, a white LED with a CRI greater than 90. The near-infrared light source 12 is a laser light source or an LED light source with a half-width at half-maximum (WHM) of 10 nm. When the multiple primary color light sources emit narrowband light, they are LED light sources with a spectral width of no more than 30 nm. When the multiple primary color light sources emit broadband light, they are LED light sources with a spectral width greater than 30 nm. The X-prism 32 of the light combining component 3 can achieve beam combining within multiple wavelength ranges. The advantage of this design is that the independent control switch can quickly and accurately switch to the light source to be lit through electrical adjustment, offering higher freedom and speed compared to motor switching, and enabling the composite light output of more narrowband light. The light source collimation component and the fiber optic coupling component are one, two, or three aspherical lens modules, which can improve the collimation of the lighting source and the coupling efficiency of the beam finally coupled into the fiber optic fiber through the fiber coupling lens or module, resulting in higher system lighting efficiency. The system's light combining component is mainly for spatial light transmission. It can combine more light sources at the maximum while reducing the number of fiber couplings, thereby enabling multiple composite modes and more efficient lighting, and reducing unnecessary energy loss.

[0069] Furthermore, to further improve structural rationality, the primary color light sources are used to emit narrowband or broadband light. The spectral width of multiple primary color light sources is no greater than 30nm. The peak wavelength of the narrowband blue LED is 450nm, the peak wavelength of the narrowband green LED is in the range of 525-540nm, the peak wavelength of the narrowband red LED is in the range of 625-635nm, the peak wavelength of the narrowband blue-violet LED is in the range of 405-415nm, and the peak wavelength of the narrowband yellow-orange LED is in the range of 585-610nm. The infrared light source is a laser light source or an LED light source with a half-width of 10nm, which can achieve narrowband light output.

[0070] Furthermore, the first color filter 31 is a short-pass bidirectional color filter or a band-pass color filter, and the second color filter 33 is a long-pass bidirectional color filter. The advantage of this design is that it enables beam combining while better controlling the bandwidth of the primary color light to within 30nm.

[0071] Example 2

[0072] The difference between Example 2 and Example 1 is as follows: Figure 3 , 4As shown in Figures 5 and 6, in order to achieve broadband coaxial beam combining of non-coaxial light, reduce the difficulty of fiber coupling mirror assembly, and improve the coupling efficiency of fiber, a coaxial beam combining component 5 is also provided between the beam combining component 3 and the fiber coupling module 4. The coaxial beam combining component 5 includes a first reflector 51, an incoherent light coaxial beam combining element 52, and a second reflector 53. The first reflector 51 and the second reflector 53 are symmetrically arranged along the incoherent light coaxial beam combining element 52. The first reflector 51 receives the beam output by the beam combining component 3, and the second reflector 52 receives the beam of light emitted by the white light source 11 after being collimated by the corresponding light source collimation module 2. At the same time, the incoherent light coaxial beam combining element 52 receives the out-of-axis beams reflected by the first reflector 51 and the second reflector 53 to achieve coaxial beam combining and mixed light projection onto the fiber coupling module 4.

[0073] Furthermore, such as Figure 5 , 6 As shown, the advantages of this design are that it can effectively achieve coaxial beam combining and mixing, has a simple structure that is easy to manufacture, and does not change the main optical characteristics of the beam. Furthermore, the inclined surfaces are on the order of millimeters, and the serrated edge dispersion does not affect the main optical characteristics of the beam. Specifically, the incoherent coaxial beam combining element 52 has n inclined surfaces a, and these n inclined surfaces a form a reflective surface arranged in a serrated array. A reflective film is deposited on this reflective surface, and a protective layer to prevent oxidation is also deposited on the surface of the reflective film. The reflective film is mainly a metal film, such as aluminum, silver, or gold, and the protective layer is a SiO2 protective layer.

[0074] In non-phase coaxial beam combining, in order to achieve good coaxial beam combining and mixing while keeping the structure simple and not changing the main optical properties of the beam, such as... Figure 6 As shown, the height of each inclined surface a is b, the angle of a single sawtooth half-angle Q2 satisfies 45°<Q2≤60°, and the height b satisfies Where D is the width of the uncorrelated optical coaxial beam combiner 52, and the incident angle Q1 = 90° - Q2 of the off-axis beam incident on the uncorrelated optical coaxial beam combiner 52.

[0075] The other structures of Example 2 are exactly the same as those of Example 1.

[0076] This invention achieves multiple lighting modes by independently illuminating light source components with their own control switches. The light beams are then collimated by a collimating component, combined using a beam combining component, and finally coupled into an optical fiber via a fiber optic coupling lens or module. This allows for controlled illumination of different light source components, enabling various lighting output modes, including white light illumination, multi-narrowband light illumination, near-infrared light illumination, and composite light illumination.

[0077] The specific implementation method is as follows: The present invention illuminates light source components with independent control switches, and after the light source collimation component collimates the light source beam into near-parallel light, the light combining component combines multiple light paths, and finally the combined beam is coupled into an optical fiber through an optical fiber coupling lens or module to complete the illumination output.

[0078] In white light illumination mode, the final output is the light emitted by the white light source 11.

[0079] In the multi-narrowband illumination mode, the composite light emitted by at least two of the primary color light sources 13,

[0080] In near-infrared illumination mode, the light emitted by the near-infrared light source 12,

[0081] In the composite light illumination mode, the light emitted by the white light source 11 is a composite light emitted by at least one primary color light source 13.

[0082] The independent control switch can quickly and accurately switch to the light source to be lit through electrical adjustment. Compared with the motor, it has a high degree of freedom and speed in switching, and can realize more composite light output of narrowband light. The light source collimation component and the fiber optic coupling component can improve the collimation of the lighting source and the coupling efficiency of the beam coupled into the fiber through the fiber coupling lens or module, so that the system lighting efficiency is higher. The system's light combining component is mainly for spatial light transmission. It can combine more light sources at the maximum while reducing the number of fiber couplings, thereby realizing multiple composite modes and more efficient lighting, and reducing unnecessary energy loss.

[0083] In summary, this invention overcomes the limitations of existing technologies in terms of light output modes and the inability to output high color rendering index (CRI) illumination light with a continuous spectrum in white light illumination mode. It also solves the problems of inefficiency and inflexibility of existing narrowband illumination, which cannot meet the requirements for flexible switching between narrowband and broadband illumination, thus satisfying the illumination needs of the tested areas in clinical diagnosis and treatment.

[0084] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An endoscopic light source illumination device, characterized in that: It includes a light source assembly (1), a light source collimation module (2), a light combining assembly (3), and an optical fiber coupling module (4). The light beam emitted by the light source component (1) is collimated by the light source collimation module (2), then combined by the beam combining component (3), and finally coupled to the optical fiber by the optical fiber coupling module (4). This controls one or more beams of the light source component (1) to be coupled and output, thereby achieving lighting output under various lighting modes. in, The light source assembly (1) includes a white light source (11), a near-infrared light source (12), and multiple primary color light sources (13), wherein the primary color light sources (13) are used to emit narrowband light or broadband light. The light source collimation module (2) has multiple components. The light combining component (3) includes multiple first color filters (31), an X-ray prism (32), and a second color filter (33). The white light source (11) has a corresponding collimation module (2) on its optical path, the near-infrared light source (12) has a corresponding collimation module (2) and a second color filter (33) on its optical path, the multiple primary color light sources (13) each have a corresponding collimation module (2) and a corresponding first color filter (31) on their optical paths, the X-prism (32) is positioned between the multiple first color filters (31) and second color filters (33), and the fiber coupling module (4) is positioned on the optical path after the beam combining component (3) combines the light. A coaxial beam combining component (5) is also provided between the beam combining component (3) and the fiber coupling module (4). The coaxial beam combining component (5) includes a first reflector (51), an incoherent light coaxial beam combining element (52), and a second reflector (53). The first reflector (51) and the second reflector (53) are symmetrically arranged along the incoherent light coaxial beam combining element (52). The first reflector (51) receives the beam output by the beam combining component (3), and the second reflector (53) receives the beam of light emitted by the white light source (11) after being collimated by the corresponding light source collimation module (2). At the same time, the incoherent light coaxial beam combining element (52) receives the out-of-axis beams reflected by the first reflector (51) and the second reflector (53) to achieve coaxial beam combining and mixing before projecting the beam onto the fiber coupling module (4). The various lighting modes include white light lighting mode, multi-narrowband light lighting mode, near-infrared light lighting mode, and composite light lighting mode. In white light illumination mode, the light emitted by the white light source (11) is collimated by the corresponding light source collimation module (2) and then output through the fiber optic coupling module (4). In the multi-narrowband illumination mode, the light emitted by at least two of the primary color light sources (13) is collimated by the corresponding light source collimation module (2), then combined by the light combining component (3), and finally optically coupled by the fiber coupling module (4) to obtain the composite light. In near-infrared illumination mode, the light emitted by the near-infrared light source (12) is collimated by the corresponding light source collimation module (2), then filtered by the second color filter (33), and finally output through the fiber optic coupling module (4). In the composite light illumination mode, the light emitted by the white light source (11) and the light emitted by at least one primary color light source (13) are respectively collimated by the corresponding light source collimation module (2), and then combined by the light combining component (3), and finally optically coupled by the fiber coupling module (4) to obtain composite light.

2. The endoscopic light source illumination device according to claim 1, characterized in that: The incoherent optical coaxial beam combiner (52) has n inclined surfaces a, and the n inclined surfaces a form a reflective surface arranged in a sawtooth array. The reflective surface is coated with a reflective film layer, and the surface of the reflective film layer is also coated with a protective layer to prevent its oxidation.

3. The endoscopic light source illumination device according to claim 2, characterized in that: The height of each inclined surface a is b, and the angle of the half-angle Q2 of a single sawtooth satisfies 45°<Q2≤60°, and the height b satisfies... Where D is the width of the non-coherent optical coaxial beam combiner (52), and the incident angle Q1 = 90° - Q2 of the off-axis beam incident on the non-coherent optical coaxial beam combiner (52).

4. The endoscopic light source illumination device according to claim 1, characterized in that: The light source collimation module (2) is composed of an aspherical lens, or the light source collimation module (2) includes a collimation module lens composed of two or three spherical lenses.

5. The endoscopic light source illumination device according to claim 1, characterized in that: The plurality of primary color light sources (13) include narrowband blue LEDs, narrowband green LEDs, narrowband red LEDs, narrowband blue-violet LEDs, and narrowband yellow-orange LEDs. The narrowband blue-violet LEDs and narrowband yellow-orange LEDs are arranged opposite to each other, and the narrowband blue LEDs, narrowband green LEDs, and narrowband red LEDs are located on one side of the narrowband blue-violet LEDs and narrowband yellow-orange LEDs. Each of the narrowband blue LEDs, narrowband green LEDs, narrowband red LEDs, narrowband blue-violet LEDs, and narrowband yellow-orange LEDs has a light source collimation module (2) on its output optical path. Two first filters (31) and an X-prism (32) are provided between the narrowband blue-violet LED and the narrowband yellow-orange LED. The X-prism (32) is located between the two first filters (31). At the same time, the two first filters (31) are respectively arranged opposite to the light source collimation module (2) on the light path of the narrowband blue LED and the light path of the narrowband red LED. The X-prism (32) is arranged opposite to the light source collimation module (2) on the light path of the narrowband green LED. The second color filter (33) on the light path of the near-infrared light source (12) is also arranged opposite to the X-prism (32).

6. The endoscopic light source illumination device according to claim 1, characterized in that: The fiber optic coupling module (4) is composed of an aspherical lens, or the fiber optic coupling module (4) is composed of a collimating module lens consisting of two or three spherical lenses.

7. The endoscopic light source illumination device according to claim 1, characterized in that: The white light source (11) is a high color rendering index white light source with a wavelength of 400-700nm, the near-infrared light source (12) is a laser light source or an LED light source with a half-width of 10nm, the multiple primary color light sources (13) are LED light sources with a spectral width of no more than 30nm when emitting narrow-band light, and LED light sources with a spectral width of more than 30nm when emitting broadband light.

8. The endoscopic light source illumination device according to claim 5, characterized in that: The peak wavelength of the narrowband blue LED is 450nm, the peak wavelength of the narrowband green LED is in the range of 525-540nm, the peak wavelength of the narrowband red LED is in the range of 625-635nm, the peak wavelength of the narrowband blue-violet LED is in the range of 405-415nm, and the peak wavelength of the narrowband yellow-orange LED is in the range of 585-610nm.

9. The endoscopic light source illumination device according to claim 1, characterized in that: The first color filter (31) is a short-pass bidirectional color filter or a band-pass color filter, and the second color filter (33) is a long-pass bidirectional color filter.

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