Endoscope light source illumination device

Abstract

The endoscope light source lighting device comprises a light source assembly, a light source collimation module, a light combination assembly and an optical fiber coupling module, after light beams emitted by the light source assembly are collimated by the light source collimation module, the light beams are combined through the light combination assembly, and finally the light beams are coupled with optical fibers through the optical fiber coupling module. And one or more paths of light beams of the light source assembly are controlled to be coupled and output, illumination output in multiple illumination modes is achieved, and the multiple illumination modes comprise a white light illumination mode, a multi-narrow-band light illumination mode, a near-infrared light illumination mode and a composite light illumination mode. According to the multi-channel lighting mode, narrow-band or broadband spectrum composite lighting is achieved, the problems that in the prior art, the light emitting mode is limited, and high-color-rendering-index lighting light with continuous spectrums cannot be output in a white light lighting mode are solved, and the problems that original narrow-band lighting is low in efficiency, inflexible and poor in lighting effect are solved. And the requirement of flexible switching between narrow-band illumination and wide-band illumination cannot be met, and the illumination requirement of a detected part in clinical diagnosis and treatment is met.

Description

Technical Field

[0001] The invention relates to an illumination device, in particular to an endoscope light source illumination device suitable for the medical field, which can realize narrow-band or broadband spectrum composite illumination and belongs to the field of optical technology. Background Art

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

[0003] The illumination source scheme used in traditional rigid endoscopes adopts a xenon lamp with a wide spectrum light source and multiple narrowband filters. At the same time, most conventional medical diagnoses still require broadband white light illumination imaging. Traditional narrowband illumination, broadband illumination, and near-infrared illumination require switching different light sources, or filtering out unnecessary spectra in one light source, causing inconvenience in use or energy waste.

[0004] In practical applications, in order to meet the needs of diagnosis, the endoscope light source is optimized and designed. In addition to using broadband white light to observe the inspected part, narrow-band illumination light is also used to observe the inspected part. The depth of penetration of narrow-band light waves into the organ mucosa is different. For example, the penetration depth of short waves is shallow, and the penetration depth of long waves is deep, which can reach the submucosal layer. Since the optical properties of blood in the mucosa absorb light of different wavelengths differently, 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 epithelial morphology and better help endoscopists distinguish between normal and diseased tissues in different locations, thereby improving the accuracy of endoscopic diagnosis and being used to diagnose various diseases.

[0005] The existing lighting solutions on the market generally use a dichroic mirror to couple narrow-band red light into white light to adjust the color rendering index and R9 (saturated red) index in the white light mode, but it is difficult to achieve the diversification of light output modes. In the white light illumination mode, the spectral continuity of the endoscope light source output is poor, and there is an obvious pit at 500nm. At the same time, this endoscope light source does not specifically point out the location of the white light LED. If the white light LED is placed far away from the light outlet, the loss of white light will be too large during the white light coupling process. If the white light LED is placed close to the light outlet, it is necessary to configure a dual-bandpass dichroic filter to output white light with a high color rendering index and a continuous spectrum. However, the dual-bandpass dichroic filter is difficult to process, so this endoscope light source is not easy to arrange and it is difficult to meet the lighting requirements of the inspected part.

[0006] Or the lighting light source solution uses a xenon lamp with a wide spectrum light source, which needs to be equipped with a motor and multiple narrow-band filters to achieve a variety of narrow-band light outputs. In the composite mode, it is affected by the filter process and the motor speed, the types of composite modes are limited or the switching frame rate is slow, the energy efficiency is low, and it cannot meet the increasingly high performance requirements of clinical lighting sources. Summary of the invention

[0007] The purpose of the present invention is to provide an endoscope light source lighting device that realizes narrow-band or broadband spectral composite lighting in a multi-channel lighting mode, overcome the problems of limited light output modes in the prior art and the inability to output high-crystal-definition illumination light with a continuous spectrum in the white light illumination mode, and solve the problems of low efficiency and inflexibility of the original narrow-band lighting, and the inability to meet the requirements of flexible switching between narrow-band and broadband lighting, so as to meet the lighting needs of the detected parts in clinical diagnosis and treatment.

[0008] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: an endoscope light source lighting device, the innovation of which is: comprising a light source assembly, a light source collimation module, a light combining 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 combining assembly, and finally coupled to the optical fiber by the optical fiber coupling module to control one or more light beams of the light source assembly to be coupled and output, thereby realizing lighting output under various lighting modes.

[0010] in,

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

[0012] The light source collimation module has multiple,

[0013] The light combining assembly includes a plurality of first color filters, an X-prism and a second color filter.

[0014] A corresponding light source collimation module is provided on the light path emitted by the white light source, a corresponding light source collimation module and a second color filter are provided on the light path emitted by the near-infrared light source, corresponding light source collimation modules and corresponding first color filters are provided on the light paths emitted by the multiple primary color light sources, the X-prism is provided between the multiple first color filters and the second color filters, and the optical fiber coupling module is provided on the light path after the light is combined by the light combining component.

[0015] The multiple lighting modes include white light lighting mode, multi-narrow-band light lighting mode, near-infrared light lighting mode and composite light lighting 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 through the optical fiber coupling module.

[0017] In the multi-narrowband light illumination mode, the light emitted by at least two primary color light sources is collimated by the corresponding light source collimation modules, combined by the light combining component, and finally optically coupled by the optical fiber coupling module to obtain the composite light.

[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, filtered by the second color filter, and then output through 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 color light source are collimated by the corresponding light source collimation modules, combined by a light combining component, and finally optically coupled by an optical fiber coupling module to obtain composite light.

[0020] In the above technical solution, a coaxial beam combining component is also provided between the light combining component and the optical fiber coupling module, and the coaxial beam combining component includes a first reflector, an incoherent light coaxial beam combining element and a second reflector, wherein the first reflector and the second reflector are symmetrically arranged along the incoherent light coaxial beam combining element, and the first reflector receives the light beam output by the light combining component, and the second reflector receives the light beam emitted by the white light source after being collimated by the corresponding light source collimation module, and at the same time, the incoherent light coaxial beam combining element receives the off-axis light beams reflected by the first reflector and the second reflector to realize coaxial beam combining and mixed light projection to the optical fiber coupling module.

[0021] In the above technical solution, the incoherent light coaxial beam combining element has n inclined surfaces a, and the n inclined surfaces a constitute a reflecting surface arranged in a sawtooth array, the reflecting surface is coated with a reflecting film layer, and the surface of the reflecting film layer is also coated with a protective layer to prevent it from oxidation.

[0022] In the above technical solution, the height of each inclined surface a is b, and the half angle of a single sawtooth is Q 2The angle satisfies 45°<Q 2 ≤60°, height b meets Where D is the width of the incoherent light coaxial beam combining element, and the incident angle Q of the off-axis beam incident on the incoherent light coaxial beam combining element is 1 =90°-Q 2 .

[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 group of collimation module lenses composed of two or three spherical lenses.

[0024] In the above technical solution, the multiple primary color light sources include a narrow-band blue light LED, a narrow-band green light LED, a narrow-band red light LED, a narrow-band blue-violet light LED and a narrow-band yellow-orange light LED, the narrow-band blue-violet light LED and the narrow-band yellow-orange light LED are arranged relatively, and the narrow-band blue light LED, the narrow-band green light LED and the narrow-band red light LED are located on one side of the narrow-band blue-violet light LED and the narrow-band yellow-orange light LED, and the narrow-band blue light LED, the narrow-band green light LED, the narrow-band red light LED, the narrow-band blue-violet light LED and the narrow-band yellow-orange light LED are arranged relatively, and the narrow-band blue light LED, the narrow-band green light LED, the narrow-band red light LED, the narrow-band blue-violet light LED and the narrow-band yellow-orange light LED are arranged relatively. A light source collimation module is provided on each output optical path of the LEDs. Two first filters and an X-prism are provided between the narrow-band blue-violet LED and the narrow-band yellow-orange LED. The X-prism is located between the two first filters. Meanwhile, the two first filters are respectively arranged opposite to the light source collimation modules on the narrow-band blue LED optical path and the narrow-band red LED optical path. The X-prism is arranged opposite to the light source collimation module on the narrow-band green LED optical path. The second color filter on the near-infrared light source optical path is arranged opposite to the X-prism.

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

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

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

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

[0029] The positive effect of the present invention is that after adopting the endoscope light source lighting device of the present invention, since the present 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 assembly is collimated by the light source collimation module, combined by the light combining assembly, and finally coupled to the optical fiber by the optical fiber coupling module to control one or more light beams of the light source assembly to be coupled and output, thereby realizing lighting output under various lighting modes.

[0031] in,

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

[0033] The light source collimation module has multiple,

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

[0035] A corresponding light source collimation module is provided on the light path emitted by the white light source, a corresponding light source collimation module and a second color filter are provided on the light path emitted by the near-infrared light source, a corresponding light source collimation module and a corresponding first color filter are provided on the light paths emitted by the multiple primary color light sources, the X-prism is provided between the multiple first color filters and the second color filters, and the optical fiber coupling module is provided on the light path after the light is combined by the light combining component.

[0036] The multiple lighting modes include white light lighting mode, multi-narrow-band light lighting mode, near-infrared light lighting mode and composite light lighting mode.

[0037] 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 through the optical fiber coupling module.

[0038] In the multi-narrow-band light illumination mode, the light emitted by at least two primary color light sources is optically coupled to obtain composite light.

[0039] 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, filtered by the second color filter, and then output through the optical fiber coupling module.

[0040] In the composite light illumination mode, the light emitted by the white light source is optically coupled with the light emitted by at least one primary color light source to obtain composite light.

[0041] The present invention lights up the light source components with independent control switches respectively, collimates the light source light beams through the light source collimation component, combines multiple light paths through the light combining component, and finally couples the combined light beams into the optical fiber through the optical fiber coupling lens or module; thereby controlling the lighting of different light source components to realize lighting output in multiple modes.

[0042] The specific implementation method is as follows: the present invention lights up the light source components with independent control switches respectively, collimates the light source light beams into nearly parallel light through the light source collimation component, and then combines multiple light paths through the light combining component. The combined light beams are finally coupled into the optical fiber through the optical fiber coupling lens or module to complete the lighting output;

[0043] The independent control switch can quickly and accurately switch to the light source that needs to be lit through electrical adjustment. Compared with the motor switching, it has high freedom and fast speed, and can achieve composite light output of more narrow-band lights; the light source collimation component and the fiber coupling component can improve the collimation of the lighting light source, and the coupling efficiency of the light beam finally coupled into the optical fiber through the fiber coupling lens or module, making the system lighting efficiency higher; the system's light combining component is mainly spatial light transmission, which can combine more light sources at the same time while reducing the number of fiber couplings, thereby achieving multiple composite modes and more efficient lighting, and reducing unnecessary energy loss.

[0044] In summary, the present invention overcomes the problems of limited light output modes in the prior art and the inability to output high-CRI lighting light with a continuous spectrum in the white light lighting mode, and solves the problems of the original narrow-band lighting being inefficient and inflexible and unable to meet the requirements of flexible switching between narrow-band and broadband lighting, thereby meeting the lighting needs of the detected parts in clinical diagnosis and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0049] Figure 5 It is a schematic structural diagram of the coaxial beam combining assembly of the present invention;

[0050] Figure 6 It is a schematic structural diagram of the incoherent light coaxial beam combining element of the present invention. DETAILED DESCRIPTION

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

[0052] Example 1

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

[0054] The light beam emitted by the light source assembly 1 is collimated by the light source collimation module 2, combined by the light combining assembly 3, and finally coupled to the optical fiber by the optical fiber coupling module 4, so as to control one or more light beams of the light source assembly 1 to be coupled and output, thereby realizing lighting output in various lighting modes.

[0055] in,

[0056] The light source assembly 1 includes a white light source 11, a near-infrared light source 12 and a plurality of primary color light sources 13, wherein the primary color light sources 13 are used to emit narrow-band light or broadband light.

[0057] The light source collimating module 2 has multiple,

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

[0059] A corresponding light source collimation module 2 is provided on the light path emitted by the white light source 11, a corresponding light source collimation module 2 and a second color filter 33 are provided on the light path emitted by the near-infrared light source 12, corresponding light source collimation modules 2 and corresponding first color filters 31 are provided on the light paths emitted by the multiple primary color light sources 13, the X-prism 32 is provided between the multiple first color filters 31 and the second color filters 33, and the optical fiber coupling module 4 is provided on the light path after the light combining component 3 combines the light.

[0060] The multiple lighting modes include white light lighting mode, multi-narrow-band light lighting mode, near-infrared light lighting mode and composite light lighting mode.

[0061] In the white light illumination mode, the light emitted by the white light source 11 is collimated by the corresponding light source collimation module 2 and outputted through the optical fiber coupling module 4, mainly providing a high color rendering index continuous spectrum through a high color rendering index white light LED illumination light with a color rendering index greater than 90, and the minimum value of the spectrum of the illumination light is not less than 5% of the maximum value of the spectrum of the illumination light.

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

[0063] In the near-infrared light illumination mode, the light emitted by the near-infrared light source 12 is collimated by the corresponding light source collimation module 2, filtered by the second color filter 33, and then output through the optical fiber 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 collimated by the corresponding light source collimation module 2, combined by the light combining component 3, and finally optically coupled by the optical fiber coupling module 4 to obtain composite light.

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

[0066] Further, such as Figure 2 As shown, in order to make the structure more reasonable, by independently controlling the lighting of different light sources, the multiple primary color light sources 13 include narrow-band blue light LEDs, narrow-band green light LEDs, narrow-band red light LEDs, narrow-band blue-violet light LEDs and narrow-band yellow-orange light LEDs, the narrow-band blue-violet light LEDs and narrow-band yellow-orange light LEDs are arranged relatively, and the narrow-band blue light LEDs, narrow-band green light LEDs and narrow-band red light LEDs are located on one side of the narrow-band blue-violet light LEDs and the narrow-band yellow-orange light LEDs, and the narrow-band blue light LEDs, narrow-band green light LEDs, narrow-band red light LEDs, narrow-band blue-violet light LEDs and narrow-band yellow-orange light LEDs are arranged relatively. A light source collimation module 2 is provided on the output optical path of each LED, 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, and 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 narrow-band blue light LED optical path and the narrow-band red light LED optical path, the X-prism 32 is arranged opposite to the light source collimation module 2 on the narrow-band green light LED optical path, and the second color filter 33 on the optical path of the near-infrared light source 12 is arranged opposite to the X-prism 32.

[0067] Further, such as Figure 2 As shown, in order to couple the combined light beams, the optical fiber coupling module 4 is composed of an aspherical lens. Of course, the structure is not limited to this. The optical fiber coupling module 4 can also be composed of a collimating module lens composed of two or three spherical lenses. The advantage of this design is that it increases the coupling efficiency of the combined light beams into the optical fiber and improves the energy utilization rate of the illumination light source.

[0068] Furthermore, the white light source 11 is a high color rendering index white light source with a wavelength of 400 to 700 nm, a white light LED with a color rendering index greater than 90, the near-infrared light source 12 is a laser light source or an LED light source with a half-height width of 10 nm, the multiple primary color light sources are LED light sources with a spectrum width of no more than 30 nm when emitting narrow-band light, and the multiple primary color light sources are LED light sources with a spectrum width greater than 30 nm when emitting broadband light. The X-prism 32 of the light combining component 3 can realize beam combining within multiple bands. The advantage of this design is that the independent control switch can quickly and accurately switch to the light source that needs to be lit by electrical adjustment, and has a high degree of freedom and high speed relative to the motor switching, and can realize the composite light output of more narrow-band light; the light source collimation component and the optical fiber coupling component are a non-spherical or two or three spherical mirror lens modules, which can improve the collimation of the illumination light source, and the coupling efficiency of the light beam finally coupled into the optical fiber through the optical fiber coupling lens or module, so that the system illumination light efficiency is higher. The system's light combining components are mainly for spatial light transmission, which can combine as many light sources as possible while reducing the number of fiber couplings, thereby achieving multiple composite modes and more efficient lighting, and reducing unnecessary energy loss.

[0069] Furthermore, in order to further improve the rationality of the structure, the primary color light source is used to emit narrowband light or broadband light, the spectrum width of multiple primary color light sources is not greater than 30nm, the peak wavelength of the narrowband blue light LED is 450nm, the peak wavelength of the narrowband green light LED is in the range of 525-540nm, the peak wavelength of the narrowband red light LED is in the range of 625-635nm, the peak wavelength of the narrowband blue-violet light LED is in the range of 405-415nm, and the peak wavelength of the narrowband yellow-orange light 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-height width of 10nm, which can achieve narrowband light output.

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

[0071] Example 2

[0072] The difference between Example 2 and Example 1 is that: Figure 3 , 4As shown in Figures 5 and 6, in order to realize the coaxial combining of wide-spectrum non-coaxial light, reduce the difficulty of the fiber coupling mirror group and improve the coupling efficiency of the optical fiber, a coaxial combining component 5 is further provided between the light combining component 3 and the fiber coupling module 4. The coaxial combining component 5 includes a first reflector 51, an incoherent light coaxial 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 combining element 52. The first reflector 51 receives the light beam output by the light combining component 3, and the second reflector 52 receives the light beam 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 combining element 52 receives the off-axis light beams reflected by the first reflector 51 and the second reflector 53 to realize coaxial combining and mixed light projection to the fiber coupling module 4.

[0073] Further, such as Figure 5 , 6 As shown, the advantage of such a design is that it can well realize coaxial beam combining and light mixing, the structure is simple and easy to process, and it will not change the main optical properties of the light beam. The size of the inclined surface is in the order of millimeters, and the sawtooth edge dispersion does not affect the main optical properties of the light beam. That is, the incoherent light coaxial beam combining element 52 has n inclined surfaces a, and the n inclined surfaces a constitute a reflecting surface arranged in a sawtooth array, and the reflecting surface is coated with a reflecting film layer, and the surface of the reflecting film layer is also coated with a protective layer to prevent it from oxidation. The reflecting film layer is mainly a metal film, which can be an aluminum film, a silver film, or a gold film, and the protective layer is SiO 2 Protective layer.

[0074] In the non-phase coaxial light beam combination, in order to achieve good coaxial beam combination and light mixing, while making 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, and the half angle of a single sawtooth is Q 2 The angle satisfies 45°<Q 2 ≤60°, height b meets Wherein, D is the width of the incoherent light coaxial beam combining element 52, and the incident angle Q of the off-axis light beam incident on the incoherent light coaxial beam combining element 52 is 1 =90°-Q 2 .

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

[0076] The present invention lights up the light source components with independent control switches respectively, collimates the light source light beams through the light source collimation component, combines the light beams in multiple light paths through the light combining component, and finally couples the combined light beams into the optical fiber through the optical fiber coupling lens or module; thereby controlling the lighting of different light source components to realize lighting output in multiple modes, specifically including white light lighting mode, multi-narrow-band light lighting mode, near-infrared light lighting mode and composite light lighting mode.

[0077] The specific implementation method is as follows: the present invention lights up the light source components with independent control switches respectively, collimates the light source light beams into nearly parallel light through the light source collimation component, and then combines multiple light paths through the light combining component. The combined light beams are finally coupled into the optical fiber through the optical fiber coupling lens or module to complete the lighting output;

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

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

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

[0081] In the composite light illumination mode, the light emitted by the white light source 11 is composited with the 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 that needs to be lit through electrical adjustment. Compared with the motor switching, it has high freedom and fast speed, and can achieve composite light output of more narrow-band lights; the light source collimation component and the fiber coupling component can improve the collimation of the lighting light source, and the coupling efficiency of the light beam finally coupled into the optical fiber through the fiber coupling lens or module, making the system lighting efficiency higher; the system's light combining component is mainly spatial light transmission, which can combine more light sources at the same time while reducing the number of fiber couplings, thereby achieving multiple composite modes and more efficient lighting, and reducing unnecessary energy loss.

[0083] In summary, the present invention overcomes the problems of limited light output modes in the prior art and the inability to output high-CRI lighting light with a continuous spectrum in the white light lighting mode, and solves the problems of the original narrow-band lighting being inefficient and inflexible and unable to meet the requirements of flexible switching between narrow-band and broadband lighting, thereby meeting the lighting needs of the detected parts in clinical diagnosis and treatment.

[0084] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An endoscope light source lighting device, characterized in that: It comprises 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 assembly (1) is collimated by the light source collimation module (2), combined by the light combining assembly (3), and finally coupled to the optical fiber by the optical fiber coupling module (4), thereby controlling one or more light beams of the light source assembly (1) to be coupled and output, thereby realizing lighting output under various lighting modes. in, The light source assembly (1) comprises a white light source (11), a near-infrared light source (12) and a plurality of primary color light sources (13), wherein the primary color light sources (13) are used to emit narrow-band light or broadband light. The light source collimating module (2) comprises a plurality of: The light combining component (3) comprises a plurality of first color filters (31), an X-prism (32) and a second color filter (33). A corresponding light source collimating module (2) is provided on the light path emitted by the white light source (11); a corresponding light source collimating module (2) and a second color filter (33) are provided on the light path emitted by the near-infrared light source (12); corresponding light source collimating modules (2) and corresponding first color filters (31) are provided on the light paths emitted by the plurality of primary color light sources (13); the X-prism (32) is provided between the plurality of first color filters (31) and the second color filters (33); the optical fiber coupling module (4) is provided on the light path after the light is combined by the light combining component (3); The multiple lighting modes include white light lighting mode, multi-narrow-band light lighting mode, near-infrared light lighting mode and composite light lighting mode. In the 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 optical fiber coupling module (4). In the multi-narrowband light illumination mode, the light emitted by at least two primary color light sources (13) is collimated by the corresponding light source collimation modules (2), combined by the light combining component (3), and finally optically coupled by the optical fiber coupling module (4) to obtain composite light. In the near-infrared light illumination mode, the light emitted by the near-infrared light source (12) is collimated by the corresponding light source collimation module (2), filtered by the second color filter (33), and then output through the optical fiber 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 collimated by corresponding light source collimation modules (2), combined by a light combining component (3), and finally optically coupled by an optical fiber coupling module (4) to obtain composite light.

2. The endoscope light source lighting device according to claim 1, characterized in that: A coaxial beam combining component (5) is also provided between the light combining component (3) and the optical fiber coupling module (4), the coaxial beam combining component (5) comprising 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) being symmetrically arranged along the incoherent light coaxial beam combining element (52), the first reflector (51) receiving the light beam output by the light combining component (3), the second reflector (52) receiving the light beam emitted by the white light source (11) after being collimated by the corresponding light source collimation module (2), and the incoherent light coaxial beam combining element (52) receiving the off-axis light beams reflected by the first reflector (51) and the second reflector (53) to achieve coaxial beam combining and mixed light projection to the optical fiber coupling module (4).

3. The endoscope light source lighting device according to claim 2, characterized in that: The incoherent light coaxial beam combining element (52) has n inclined surfaces a, and the n inclined surfaces a constitute a reflecting surface arranged in a sawtooth array, the reflecting surface is plated with a reflecting film layer, and the surface of the reflecting film layer is also plated with a protective layer to prevent oxidation thereof.

4. The endoscope light source lighting device according to claim 3, characterized in that: 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 Wherein, D is the width of the incoherent light coaxial beam combining element (52), and the incident angle Q1 of the off-axis light beam incident on the incoherent light coaxial beam combining element (52) is 90°-Q2.

5. The endoscope light source lighting device according to claim 1, characterized in that: The light source collimating module (2) is composed of an aspherical lens, or the light source collimating module (2) comprises a group of collimating module lenses composed of two or three spherical lenses.

6. The endoscope light source lighting device according to claim 1, characterized in that: The plurality of primary color light sources (13) include a narrow-band blue light LED, a narrow-band green light LED, a narrow-band red light LED, a narrow-band blue-violet light LED and a narrow-band yellow-orange light LED. The narrow-band blue-violet light LED and the narrow-band yellow-orange light LED are arranged relative to each other, and the narrow-band blue light LED, the narrow-band green light LED and the narrow-band red light LED are located on one side of the narrow-band blue-violet light LED and the narrow-band yellow-orange light LED. A light source collimating module (2) is provided on each of the output light paths of the narrow-band blue light LED, the narrow-band green light LED, the narrow-band red light LED, the narrow-band blue-violet light LED and the narrow-band yellow-orange light LED. Two first filters (31) and an X-prism (32) are arranged 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). Meanwhile, the two first filters (31) are arranged opposite to the light source collimation modules (2) on the narrow-band blue LED optical path and the narrow-band red LED optical path, respectively. The X-prism (32) is arranged opposite to the light source collimation module (2) on the narrow-band green LED optical path. The second color filter (33) on the optical path of the near-infrared light source (12) is arranged opposite to the X-prism (32).

7. The endoscope light source lighting device according to claim 1, characterized in that: The optical fiber coupling module (4) is composed of an aspherical lens, or the optical fiber coupling module (4) is composed of a collimating module lens composed of two or three spherical mirrors.

8. The endoscope light source lighting 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 to 700 nm, the near-infrared light source (12) is a laser light source or an LED light source with a half-width of 10 nm, and the multiple primary color light sources (13) are LED light sources with a spectrum width of no more than 30 nm when emitting narrow-band light, and are LED light sources with a spectrum width of more than 30 nm when emitting broadband light.

9. The endoscope light source lighting device according to claim 6, characterized in that: The peak wavelength of the narrow-band blue LED is 450nm, the peak wavelength of the narrow-band green LED is in the range of 525-540nm, the peak wavelength of the narrow-band red LED is in the range of 625-635nm, the peak wavelength of the narrow-band blue-violet LED is in the range of 405-415nm, and the peak wavelength of the narrow-band yellow-orange LED is in the range of 585-610nm.

10. The endoscope light source lighting device according to claim 1, characterized in that: The first color filter (31) is a short-pass dichroic color filter or a band-pass color filter, and the second color filter (33) is a long-wave pass dichroic color filter.

Images