Endoscope light source lighting device

Abstract

The utility model relates to an endoscope light source lighting device, which comprises a light source assembly, a light source collimation module, a light combination assembly and an optical fiber coupling module, light beams emitted by the light source assembly are collimated by the light source collimation module, combined by the light combination assembly, and finally coupled with optical fibers by 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 utility model, narrow-band or broadband spectrum composite illumination is realized in a multi-channel illumination mode, the problems of limited light emitting mode and incapability of outputting high-color-rendering-index illumination light with continuous spectrums in a white light illumination mode in the prior art are solved, and the problems of low efficiency, inflexibility, low cost and the like of original narrow-band illumination 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 utility model relates to a kind of lighting device, specifically to a kind of endoscope light source lighting device suitable for medical field, can realize narrowband or broadband spectrum composite illumination, belong to optical technology field. BACKGROUND

[0002] Endoscope light source is used to output illumination light, and the illumination light is coupled into the light guide fiber of the endoscope through the 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 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 the processed image is displayed by the display device for observation; It has been widely used in clinical.

[0003] The traditional hard mirror endoscope uses a xenon lamp wide spectrum light source with multiple narrowband filters. At the same time, most conventional medical diagnosis still needs to use broadband white light illumination imaging. Traditional narrowband illumination, broadband 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 practical application, 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 detected part, narrowband illumination light is also used to observe the detected part. The penetration depth of narrowband light wave through the mucous membrane of the organ 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 absorb different wavelengths of light 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. Narrowband imaging uses narrowband 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 diagnosing 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, the spectral continuity of the endoscope light source output light is poor in the white light illumination mode, and there is a significant notch at 500nm. Meanwhile, the endoscope light source does not specifically indicate the position of the white light LED, if the white light LED is placed away from the light outlet, the loss of white light is too large in the white light coupling process, and 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 double-bandpass dichroic sheet is difficult to process, so that the endoscope light source is not easy to arrange, and it is difficult to meet the illumination demand of the detected part.

[0006] Or the lighting light source scheme adopts a xenon lamp wide spectrum light source, and multiple narrow-band filters need to be matched with a motor to realize multiple narrow-band light output, and the type of composite mode is limited or the switching frame rate is slow under the influence of the filter process and the motor speed, the energy efficiency is low, and the performance demand of the clinical illumination light source cannot be met. Practical new type content

[0007] The purpose of the present application is to provide a multi-channel illumination mode to realize narrow-band or wide-band spectrum 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 of narrow-band and wide-band illumination of the original narrow-band illumination, and to meet the illumination demand 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, the one-way or multi-way light beam of the light source assembly is coupled and output, and the illumination output in multiple illumination modes is realized,

[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 source is 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 the plurality of primary color 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 color light sources is collimated by the corresponding light source collimation module, 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 color light source are collimated by the corresponding light source collimation module, 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 projection 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, and the n inclined surfaces a form a reflection surface arranged in a sawtooth array, 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 technical scheme, the height of each inclined surface a is b, the half angle of the single sawtooth is Q2, and 45° < Q2 < 60°, and the height b satisfies b = 2Q2. Wherein, D is the width of the incoherent light coaxial beam combining element, the incident angle of the incoherent light coaxial beam combining element is Q1 = 90°-Q2.

[0023] In the technical scheme, the light source collimation module is composed of an aspherical lens, or the light source collimation module comprises a collimation module lens composed of two or three spherical mirrors.

[0024] In the technical scheme, the multiple primary color light sources 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 the narrow-band yellow-orange light LEDs are oppositely arranged, and the narrow-band blue light LEDs, the narrow-band green light LEDs and the 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, the narrow-band blue light LEDs, the narrow-band green light LEDs, the narrow-band red light LEDs, the narrow-band blue-violet light LEDs and the narrow-band yellow-orange light LEDs are respectively provided with light source collimation modules on the output light paths thereof, two first color filters and an X prism are arranged between the narrow-band blue-violet light LEDs and the narrow-band yellow-orange light LEDs, the X prism is located between the two first color filters, meanwhile, the two first color filters are oppositely arranged with the light source collimation modules on the light paths of the narrow-band blue light LEDs and the narrow-band red light LEDs respectively, the X prism is oppositely arranged with the light source collimation module on the light path of the narrow-band green light LEDs, and a second color filter on the light path of the near-infrared light source is oppositely arranged with the X prism.

[0025] In the technical scheme, the optical fiber coupling module is composed of an aspherical lens, or the optical fiber coupling module is composed of a collimation module lens composed of two or three spherical mirrors.

[0026] In the technical scheme, the white light source is a high-color-rendering white light source with a wavelength of 400-700 nm, the near-infrared light source is a laser light source or an LED light source with a half width of 10 nm, the multiple primary color light sources are LED light sources with a spectral width of not more than 30 nm when emitting narrow-band light, and the multiple primary color light sources are LED light sources with a spectral width of more than 30 nm when emitting wide-band light.

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

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

[0029] The endoscope light source illumination device has the following advantages: the endoscope light source illumination device comprises a light source assembly, a light source collimation module, a light combination assembly and a 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 combination assembly, and finally coupled by the fiber coupling module, so that one or more light beams of the light source assembly are coupled and output, and illumination output in multiple illumination modes is realized,

[0031] The light source assembly comprises a white light source, a near-infrared light source and a plurality of primary color light sources,

[0032] The light source assembly comprises a white light source, a near-infrared light source and a plurality of primary color light sources,

[0033] The light source collimation module has a plurality of

[0034] The light combination assembly comprises a plurality of first filters, an X prism and a second filter,

[0035] 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 filter, the light path of the plurality of primary color light sources is provided with a corresponding light source collimation module and a corresponding first filter, the X prism is arranged between the plurality of first filters and the second filter, and the fiber coupling module is arranged on the light path after the light combination assembly combines light,

[0036] The plurality of 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,

[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 after passing through the fiber coupling module,

[0038] In the multi-narrow-band light illumination mode, the light emitted by at least two primary color light sources is 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 filter and then output after passing through the fiber coupling module,

[0040] 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 coupled to obtain composite light,

[0041] The utility model discloses a light source assembly is lit respectively with independent control switch control, collimates the light source light beam through light source collimation subassembly to be nearly parallel light, carries out the light path of multiple light through light subassembly and finally the light beam after the beam combination is coupled into the optical fiber through the optical fiber coupling lens or module, to realize the lighting of different light source assembly and realize the illumination output of multiple modes,

[0042] Independent control switch can be switched to the light source that needs to be lit quickly and accurately through the electric regulation, and the switching freedom is high, the speed is fast, and more narrowband light composite light output can be realized, the collimation degree of the illumination light source can be improved through the light source collimation subassembly and the optical fiber coupling subassembly, and the coupling efficiency of the light beam that is finally coupled into the optical fiber through the optical fiber coupling lens or module, so that the system illumination light efficiency is higher, the light combination component of the system is mainly spatial light transmission, can combine more light sources at the same time, reduces the times of optical fiber coupling, so that multiple composite modes and illumination are more efficient, and unnecessary energy loss is reduced.

[0043] In conclusion, the utility model overcomes the problem of limited light output mode and the problem that white light illumination mode output cannot have high-illuminance index illumination light with continuity spectrum in the prior art, solves the problem of low efficiency, inflexibility of original narrowband illumination, and cannot meet the requirement of narrowband and broadband illumination flexible switching, and meets the illumination requirement of the detected part in clinical diagnosis and treatment. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is the principle schematic diagram of the first embodiment of the utility model,

[0045] Figure 2 It is the structure schematic diagram of the first embodiment of the utility model,

[0046] Figure 3 It is the principle schematic diagram of the second embodiment of the utility model,

[0047] Figure 4 It is the structure schematic diagram of the second embodiment of the utility model,

[0048] Figure 5 It is the structure schematic diagram of the coaxial beam combination subassembly of the utility model,

[0049] Figure 6 It is the structure schematic diagram of the non-coherent light coaxial beam combination element of the utility model. DETAILED DESCRIPTION

[0050] The utility model is further explained below in combination with the drawings and the embodiment given, but is not limited to this.

[0051] Embodiment 1

[0052] AsFigure 1 、 2 An endoscope light source illumination device is shown in FIG. 1, which comprises a light source assembly 1, a light source collimation module 2, a light combination assembly 3 and a fiber coupling module 4,

[0053] The light beam emitted by the light source assembly 1 is collimated by the light source collimation module 2, then combined by the light combination assembly 3, and finally coupled into the optical fiber through the fiber coupling module 4. One or more light beams from the light source assembly 1 are coupled and output to realize illumination output in multiple illumination modes,

[0054] Among them,

[0055] 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, and the primary color light sources 13 are used to emit narrowband light or broadband light,

[0056] The light source collimation module 2 has a plurality of,

[0057] The light combination assembly 3 comprises a plurality of first color filters 31, an X prism 32 and a second color filter 33,

[0058] The light path of the white light source 11 is provided with a corresponding light source collimation module 2, the light path of the near-infrared light source 12 is provided with a corresponding light source collimation module 2 and a second color filter 33, and the light path of each of the plurality of primary color light sources 13 is provided with a corresponding light source collimation module 2 and a corresponding first color filter 31. The X prism 32 is arranged between the plurality of first color filters 31 and the second color filter 33, and the fiber coupling module 4 is arranged on the light path after the light combination assembly 3 combines the light,

[0059] The multiple illumination modes include a white light illumination mode, a multi-narrowband light illumination mode, a near-infrared light illumination mode and a composite light illumination mode,

[0060] 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, then output after passing through the fiber coupling module 4, mainly to provide high-index continuous spectrum by high-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,

[0061] 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, then combined by the light combination assembly 3, and finally coupled into the optical fiber through the fiber coupling module 4 to obtain composite light,

[0062] 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, then filtered by the second color filter 33, and finally output after passing through the fiber coupling module 4,

[0063] 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, then combined by the light combination assembly 3, and finally coupled by the optical fiber coupling module 4 to obtain the composite light.

[0064] Further, 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 combination and coupling, as shown in Figure 2 The light source collimation module 2 is composed of an aspherical lens, of course, the structure is not limited to this, and the light source collimation module 2 can also be composed of a collimation module lens including a group of two or three spherical mirrors.

[0065] Further, as shown in Figure 2 In order to make the structure more reasonable, by independently controlling the lighting of different light sources, the plurality of primary color light sources 13 includes 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 the narrow-band yellow-orange light LEDs are oppositely arranged, and the narrow-band blue light LEDs, the narrow-band green light LEDs, and the 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, the narrow-band blue light LEDs, the narrow-band green light LEDs, the narrow-band red light LEDs, the narrow-band blue-violet light LEDs, and the narrow-band yellow-orange light LEDs each have a light source collimation module 2 on the output light path, two first color filters 31 and an X prism 32 are arranged between the narrow-band blue-violet light LEDs and the narrow-band yellow-orange light LEDs, the X prism 32 is located between the two first color filters 31, and meanwhile, the two first color filters 31 are oppositely arranged with the light source collimation modules 2 on the light paths of the narrow-band blue light LEDs and the narrow-band red light LEDs, respectively, the X prism 32 is oppositely arranged with the light source collimation module 2 on the light path of the narrow-band green light LEDs, and the second color filter 33 on the light path of the near-infrared light source 12 is oppositely arranged with the X prism 32.

[0066] Further, as shown in Figure 2 In order to couple the light beams after beam combination, the optical fiber coupling module 4 is composed of an aspherical lens, of course, the structure is not limited to this, and the optical fiber coupling module 4 can also be composed of a collimation module lens including two or three spherical mirrors. The advantage of this design is that it increases the coupling efficiency of the light beams after beam combination into the optical fiber and improves the energy utilization rate of the illumination light source.

[0067] Further, the white light source 11 is a high color rendering index white light source with a wavelength of 400-700 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-width of 10 nm, the multiple primary color light sources are LED light sources with a spectral width not greater than 30 nm when emitting narrow-band light, and the multiple primary color light sources are LED light sources with a spectral width greater than 30 nm when emitting wide-band light. The X prism 32 of the light combining assembly 3 can realize beam combining in multiple waveband ranges. The advantage of this design is that independent control switches can quickly and accurately switch to the light source that needs to be turned on through electrical adjustment, and the degree of freedom is high, the speed is fast, and more narrow-band light composite light output can be realized; the light source collimation assembly and the optical fiber coupling assembly are a piece of aspheric surface or two or three pieces of spherical surface lens module, which can improve the collimation of the illumination light source and the coupling efficiency of the light beam coupled into the optical fiber through the optical fiber coupling lens or module, so that the system illumination light efficiency is higher. The light combining assembly of the system is mainly spatial light transmission, which can maximize the beam combining of more light sources while reducing the number of optical fiber coupling, thereby realizing multiple composite modes and more efficient illumination, and reducing unnecessary energy loss.

[0068] Further, in order to further improve the structural rationality, the primary color light source is used to emit narrow-band light or wide-band light, the spectral width of the multiple primary color light sources is not greater than 30 nm, the peak wavelength of the narrow-band blue light LED is 450 nm, the peak wavelength of the narrow-band green light LED is in the range of 525-540 nm, the peak wavelength of the narrow-band red light LED is in the range of 625-635 nm, the peak wavelength of the narrow-band blue-violet light LED is in the range of 405-415 nm, and the peak wavelength of the narrow-band yellow-orange light LED is in the range of 585-610 nm. The infrared light source is a laser light source or an LED light source with a half-width of 10 nm, which can realize narrow-band light output.

[0069] Further, 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 realize beam combining while better controlling the bandwidth of the primary color light within 30 nm.

[0070] Embodiment 2

[0071] The difference between embodiment 2 and embodiment 1 is that, as shown in Figure 3 , 4, 5, 6, in order to realize the non-coaxial light wide spectrum light coaxial beam combination, reduce the difficulty of fiber coupling mirror group and improve the coupling efficiency of optical fiber, the light combining assembly 3 and the fiber coupling module 4 are also provided with coaxial beam combining assembly 5, the coaxial beam combining assembly 5 includes first mirror 51, non-coherent light coaxial beam combining element 52 and second mirror 53, the first mirror 51 and the second mirror 53 are symmetrically arranged along the non-coherent light coaxial beam combining element 52, and the first mirror 51 receives the light beam output by the light combining assembly 3, the second mirror 53 receives the light beam collimated by the corresponding light source collimation module 2 after the light emitted by the white light source 11, and the non-coherent light coaxial beam combining element 52 receives the non-coaxial light beams reflected by the first mirror 51 and the second mirror 53, and then realizes coaxial beam combination and mixed light projection to the fiber coupling module 4.

[0072] Further, as shown in Figure 5 , 6 The benefits of such design are that the coaxial beam combination and mixed light can be well realized, the structure is simple and easy to process, and the main optical properties of the light beam are not changed, and the inclined surface is in millimeter level, and the sawtooth edge dispersion does not affect the main optical properties of the light beam.

[0073] In the non-coaxial light coaxial light beam combination, in order to well realize the coaxial beam combination and mixed light, and at the same time make the structure simple and not change the main optical properties of the light beam, as shown in Figure 6 The height of each inclined surface a is b, and the angle of a single sawtooth half angle Q2 satisfies 45° < Q2 ≤ 60°, and the height b satisfies b = D / 2. Wherein, D is the width of the non-coherent light coaxial beam combining element 52, and the incident angle Q1 of the non-coaxial light beam incident to the non-coherent light coaxial beam combining element 52 is 90°-Q2.

[0074] The other structure of embodiment 2 is completely same as that of embodiment 1.

[0075] The utility model discloses a light source assembly, light source collimation assembly, light combining assembly and fiber coupling lens or module are arranged in sequence, and the light beam of the light source is coupled into the optical fiber through the fiber coupling lens or module.

[0076] In the white light illumination mode, the final output is the light emitted by the white light source 11,

[0077] In the multi-narrow-band light illumination mode, the composite light emitted by at least two base color light sources 13,

[0078] In the near-infrared light illumination mode, the light emitted by the near-infrared light source 12,

[0079] In the composite light illumination mode, the light emitted by the white light source 11 and the composite light emitted by at least one base color light source 13.

[0080] The independent control switch can be quickly and accurately switched to the light source to be lightened by electric adjustment, has high switching freedom and high speed relative to the motor, and can realize more narrow-band light composite light output; the light source collimation assembly and the optical fiber coupling assembly can improve the collimation degree 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 light combination assembly of the system is mainly spatial light transmission, can maximize beam combination of more light sources while reducing the number of optical fiber coupling, thereby realizing more efficient multi-composite mode and illumination, and reducing unnecessary energy loss.

[0081] In summary, the utility model overcomes the problems of limited light output mode and inability to output high-illuminance-ratio illumination light with continuous spectrum in the white light illumination mode in the prior art, solves the problems of low efficiency, inflexibility and inability to meet the requirements of narrow-band and wide-band illumination flexible switching of the original narrow-band illumination, and meets the illumination requirements of the detected part in clinical diagnosis and treatment.

[0082] With the above ideal embodiments of the utility model as inspiration, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. An endoscope light source illumination device, characterized by: The light source assembly (1), the light source collimation module (2), the light combination assembly (3) and the optical fiber coupling module (4), The light beams emitted by the light source assembly (1) are collimated by the light source collimation module (2), combined by the light combination assembly (3), and finally coupled into the optical fiber by the optical fiber coupling module (4), so as to control the coupling output of one or more light beams of the light source assembly (1) and realize the illumination output in multiple illumination modes, Among them, 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), and the primary color light sources (13) are used to emit narrow-band light or broadband light, The light source collimation module (2) has a plurality of, The light combination assembly (3) includes a plurality of first color filters (31), an X prism (32) and a second color filter (33), The light path of the white light source (11) is provided with a corresponding light source collimation module (2), the light path of the near-infrared light source (12) is provided with a corresponding light source collimation module (2) and a second color filter (33), and the light path of the plurality of primary color light sources (13) is provided with a corresponding light source collimation module (2) and a corresponding first color filter (31). The X prism (32) is arranged between the plurality of first color filters (31) and the second color filter (33), and the optical fiber coupling module (4) is arranged on the light path after the light combination assembly (3) combines light, The multiple illumination modes include a white light illumination mode, a multiple narrow-band light illumination mode, a near-infrared light illumination mode and a composite light illumination 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 after passing through the optical fiber coupling module (4), In the multiple narrow-band 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) and then combined by the light combination assembly (3), and finally the composite light is obtained by optical path coupling through the optical fiber coupling module (4), 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 after passing 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 the corresponding light source collimation module (2), combined by the light combination assembly (3), and finally the composite light is obtained by optical path coupling through the optical fiber coupling module (4).

2. The endoscopic light source illumination device of claim 1, wherein: The coaxial beam combining assembly (5) is arranged between the light combining assembly (3) and the fiber coupling module (4), and comprises a first reflector (51), a non-coherent 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 non-coherent light coaxial beam combining element (52), the first reflector (51) receives the light beam output by the light combining assembly (3), the second reflector (53) receives the light beam emitted by the white light source (11) after collimation by the corresponding light source collimation module (2), and the non-coherent light coaxial beam combining element (52) receives the non-coaxial light beams reflected by the first reflector (51) and the second reflector (53) to realize coaxial beam combining and mixed light projection to the fiber coupling module (4).

3. The endoscopic light source illumination device of claim 2, wherein: The non-coherent light coaxial beam combining element (52) has n inclined surfaces a, and the n inclined surfaces a form a reflection surface arranged in a sawtooth array, 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.

4. The endoscopic light source illumination device of claim 3, wherein: 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 b = 0.5D where D is the width of the incoherent light coaxial beam combining element (52), and the incident angle Q1 = 90° - Q2 of the incoherent light beam incident to the incoherent light coaxial beam combining element (52).

5. The endoscopic light source illumination device of claim 1, wherein: 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 mirrors.

6. The endoscopic light source illumination device of claim 1, wherein: The plurality of primary color light sources (13) includes 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 the narrow-band yellow-orange light LEDs are oppositely arranged, and the narrow-band blue light LEDs, the narrow-band green light LEDs and the 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 each of the narrow-band blue light LEDs, the narrow-band green light LEDs, the narrow-band red light LEDs, the narrow-band blue-violet light LEDs and the narrow-band yellow-orange light LEDs is provided with a light source collimation module (2) on the output light path thereof, two first color filters (31) and an X prism (32) are arranged between the narrow-band blue-violet light LEDs and the narrow-band yellow-orange light LEDs, the X prism (32) is located between the two first color filters (31), and the two first color filters (31) are oppositely arranged with the light source collimation modules (2) on the light paths of the narrow-band blue light LEDs and the narrow-band red light LEDs, respectively, the X prism (32) is oppositely arranged with the light source collimation module (2) on the light path of the narrow-band green light LEDs, and a second color filter (33) on the light path of the near-infrared light source (12) is oppositely arranged with the X prism (32).

7. The endoscopic light source illumination device of claim 1, wherein: 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 mirrors.

8. The endoscopic light source illumination device of claim 1, wherein: The white light source (11) is a high-color-rendering white light source with a wavelength of 400-700 nm, the near-infrared light source (12) is a laser light source or an LED light source with a half-width of 10 nm, the plurality of primary color light sources (13) are LED light sources with a spectral width of not more than 30 nm when emitting narrow-band light, and the plurality of primary color light sources (13) are LED light sources with a spectral width of more than 30 nm when emitting wide-band light.

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

10. The endoscopic light source illumination device of claim 1, wherein: 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.

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