Light source module, light source apparatus, and endoscope system

Abstract

The application relates to a light source module, a light source device and an endoscope system. The light source module comprises: a purple light source; a blue light source; a first green light source; a second green light source; a red light source; a first light combining component for combining the purple light, the blue light and the first green light to obtain first combined light; a second light combining component for combining the first combined light, the second green light and the red light to obtain illumination light; the second light combining component is used for combining the first combined light and the second green light to obtain second combined light; when there is broadband light in the first green light and the second green light, the target light combining component filters part of the green light band of the broadband light; the second combined light contains all green light bands or contains a wider green light component than the first green light and the second green light. The application can provide a light source module and a light source device with simpler structure, lower switching delay and lower assembly difficulty.

Description

Technical Field

[0001] This application relates to the field of endoscope technology, and in particular to a light source module, a light source device, and an endoscope system. Background Technology

[0002] In the medical field, endoscopy has become a widely used diagnostic method. A medical endoscope has an insertion part that is inserted into the human body. Illumination is provided by light generated by a light source device and transmitted into the human body through a beam guide. The endoscope is captured by a camera module at the front end of the insertion part, and the image is processed by a corresponding image processor. Finally, the image is output to a display.

[0003] As light source devices providing illumination for in vivo observation, solid-state light-emitting elements (LEDs, Light Emitting Diodes, and Laser Diodes) are increasingly replacing traditional xenon and halogen lamps in practical applications due to their advantages such as low power consumption and long lifespan. In endoscopic diagnosis, white light is commonly used to observe the overall shape of living tissue surfaces. Furthermore, various special light modes have been developed to enhance the observation of blood vessels at different depths, thereby improving the screening of lesions. This necessitates light source devices providing illumination modes with different spectral forms. For example, using LEDs as the light source element and combining multiple LEDs can achieve the aforementioned white light or special light illumination output.

[0004] In common special light modes such as NBI, RDI, and BLI, multiple light sources of different colors are required to combine and produce light. Furthermore, the wavelengths required for the same color light source can sometimes differ across special light modes. Therefore, existing technologies often employ filter switching to achieve this switching. For example, in white light observation mode, a filter switching motor moves the filter out of the optical path; in special light mode 1, the motor moves the corresponding filter 1 into the optical path; and in special light mode N, the motor moves the corresponding filter N into the optical path. While this method allows switching between different wavelengths of the same color light source, it suffers from numerous drawbacks, including complex motor structures, time delays in light switching, large size, high cost, difficult assembly, and a high failure rate.

[0005] Based on the above, it is clear that there is a need in the existing technology for a light source device with a simpler structure, lower switching latency, and easier assembly to meet practical requirements. Utility Model Content

[0006] Therefore, it is necessary to provide a light source module, light source device, and endoscope system with a simpler structure, lower switching latency, and easier assembly to address the aforementioned technical problems.

[0007] This application provides a light source module for use in an endoscope. The light source module includes:

[0008] A purple light source, used to generate purple light.

[0009] Blue light source, used to generate blue light.

[0010] The first green light source is used to generate the first green light.

[0011] The second green light source is used to generate the second green light.

[0012] A red light source is used to generate red light.

[0013] The first light combining component is used to combine purple light, blue light and first green light to obtain a first combined beam.

[0014] The second beam combining component is used to combine the first beam, the second green light, and the red light to obtain illumination light.

[0015] The second light-combining component includes: the target light-combining component.

[0016] The target beam combining component is used to transmit one of the first beam combining light and the second green light and reflect the other, and combine the first beam combining light and the second green light to obtain the second beam combining light; the green light band covered by the second beam combining light is wider than the band range of the first green light and wider than the band range of the second green light, or the second beam combining light covers all green light bands.

[0017] In this process, the first green light and the second green light contain broadband light, and the target light combining component is also used to filter out part of the green light band of the broadband light in the first green light and the second green light when transmitting and / or reflecting light; or, the first green light and the second green light are both narrowband light.

[0018] This application embodiment can achieve the desired white light mode and special light mode illumination by selectively activating the required green light source, without the need for filter switching or motor-related structures. This greatly simplifies the structures required for special light illumination, significantly reducing assembly difficulty. Due to the effective simplification of the structure, the optomechanical module of this application embodiment has a lower failure rate and better stability, while also effectively reducing material costs. Furthermore, since the illumination mode switching is achieved by controlling the on / off state of different light sources instead of switching motors, different monochromatic light source spectra can be obtained for different special light observation modes. Therefore, there is no time delay caused by physical motor switching, resulting in lower switching latency. In addition, this application embodiment is compatible with different green light sources, thus providing greater flexibility in the selection of green light source components for practical applications. This reduces the cost of the green light source required for special light illumination, further reducing material costs and assembly difficulty.

[0019] In summary, the embodiments of this application can provide a light source module and light source device with a simpler structure, lower switching latency, and easier assembly.

[0020] In one embodiment, when both the first green light and the second green light are broadband lights, the target light combining component is specifically used for:

[0021] When transmitting or reflecting the first combined light, light rays with wavelengths longer than a first threshold wavelength are filtered out. When transmitting or reflecting the second green light, light rays with wavelengths shorter than the first threshold wavelength are filtered out. The filtered first combined light and the filtered second green light are then combined to obtain the second combined light. Here, the first threshold is any wavelength value in the green light band.

[0022] In one embodiment, when the first green light is broadband light and the second green light is narrowband light, the target beam combining component is specifically used to: filter out light with wavelengths longer than a first threshold wavelength when transmitting or reflecting the first beam combining light, transmit or reflect the second green light, and combine the filtered first beam combining light and the second green light to obtain the second beam combining light, where the first threshold is any wavelength value in the green light band. Or

[0023] When the first green light is narrowband light and the second green light is broadband light, the target light combining component is specifically used to: transmit or reflect the first combined light, filter out light with wavelengths shorter than the first threshold wavelength when transmitting or reflecting the second green light, and combine the first combined light and the filtered second green light to obtain the second combined light, where the first threshold is any wavelength value in the green light band.

[0024] In one embodiment, when both the first green light and the second green light are narrowband lights, there is partial overlap of green light bands in the first combined light and the second green light, and the light intensity in the green light band within the second combined light is greater than the light intensity corresponding to the full width at half maximum (FWHM).

[0025] In one embodiment, the first green light source is a fluorescent excitation source, the first green light is broadband light obtained based on blue light or violet light excitation, and the first light combining component includes:

[0026] A target dichroic mirror is used to filter out light with wavelengths shorter than the green light wavelength in the first green light, and to combine blue light and the filtered first green light.

[0027] In one embodiment, when both the first green light and the second green light are broadband lights, the method further includes:

[0028] The first green light source and the second green light source are the same or different green light sources, and the first green light contains all green light bands with wavelengths shorter than the first threshold, while the second green light contains all green light bands with wavelengths longer than the first threshold.

[0029] In one embodiment, an amber-colored light source is used to generate amber light.

[0030] The second light combining component is specifically used to combine the first combined light beam, the second green light, the red light, and the amber light to obtain illumination light.

[0031] In one embodiment, the illumination modes of the light source module include: a white light mode and a first type of special light mode. The first type of special light mode includes several seed special light modes.

[0032] In white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on.

[0033] In the first type of special light mode, the first green light source is turned on, and the remaining light sources are partially turned on.

[0034] In one embodiment, the first type of special light mode includes at least one of a first sub-special light mode, a second sub-special light mode, and a third sub-special light mode.

[0035] In the first special light mode, both the purple light source and the first green light source are turned on, and the light output of the blue light source, the second green light source, and the red light source is less than the preset light output.

[0036] In the second special light mode, both the first green light source and the red light source are turned on, and the light output of the purple light source, the blue light source and the second green light source is less than the preset light output.

[0037] In the third special light mode, the purple light source, the first green light source, and the second green light source are all turned on, and the light output of the blue light source and the red light source is less than the preset light output.

[0038] In one embodiment, the light source module further includes an amber light source for generating amber light.

[0039] In the second special light mode, the first green light source, red light source, and amber light source are all turned on, while the light output of the purple light source, blue light source, and second green light source is less than the preset light output.

[0040] In one embodiment, the illumination modes of the light source module include: a white light mode and a second type of special light mode. The second type of special light mode includes several seed special light modes.

[0041] In white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on.

[0042] In the second special light mode, the second green light source is turned on, and the other light sources are partially turned on.

[0043] In one embodiment, the second type of special light mode includes a fourth sub-special light mode and a fifth sub-special light mode.

[0044] In the fourth special light mode, both the purple light source and the second green light source are turned on, and the light output of the blue light source, the first green light source, and the red light source is less than the preset light output.

[0045] In the fifth special light mode, the purple light source, the first green light source, and the second green light source are all turned on, and the light output of the blue light source and the red light source is less than the preset light output.

[0046] In one embodiment, the illumination modes of the light source module include: white light mode, a first type of special light mode, and a second type of special light mode.

[0047] In white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on.

[0048] In the first type of special light mode, the first green light source is turned on, and the remaining light sources are partially turned on.

[0049] In the second type of special light mode, the second green light source is activated, and the remaining light sources are partially activated. The light sources activated in the first and second types of special light modes are not entirely the same.

[0050] In one embodiment, the target light-combining component is a single dichroic optical element.

[0051] In one embodiment, the first threshold is any value in the range of 540nm-560nm.

[0052] This application provides a light source module for use in an endoscope. The light source module includes:

[0053] A purple light source, used to generate purple light.

[0054] Blue light source, used to generate blue light.

[0055] The first green light source is used to generate the first green light.

[0056] The second green light source is used to generate the second green light.

[0057] A red light source is used to generate red light.

[0058] The first light combining component is used to combine purple light, blue light and first green light to obtain a first combined beam.

[0059] The second beam combining component is used to combine the first beam, the second green light, and the red light to obtain illumination light.

[0060] The second light-combining component includes: the target light-combining component.

[0061] The target beam combining component is used to transmit one of the first beam combining light and the second green light and reflect the other, and combine the first beam combining light and the second green light to obtain the second beam combining light; the proportion of the green light band covered by the second beam combining light is greater than or equal to a preset proportion threshold.

[0062] In this process, the first green light and the second green light contain broadband light, and the target light combining component is also used to filter out part of the green light band of the broadband light in the first green light and the second green light when transmitting and / or reflecting light; or, the first green light and the second green light are both narrowband light.

[0063] This application embodiment can achieve the desired white light mode and special light mode illumination by selectively activating the required green light source, without the need for filter switching or motor-related structures. This greatly simplifies the structures required for special light illumination, significantly reducing assembly difficulty. Due to the effective simplification of the structure, the optomechanical module of this application embodiment has a lower failure rate and better stability, while also effectively reducing material costs. Furthermore, since the illumination mode switching is achieved by controlling the on / off state of different light sources instead of switching motors, different monochromatic light source spectra can be obtained for different special light observation modes. Therefore, there is no time delay caused by physical motor switching, resulting in lower switching latency. In addition, this application embodiment is compatible with different green light sources, thus providing greater flexibility in the selection of green light source components for practical applications. This reduces the cost of the green light source required for special light illumination, further reducing material costs and assembly difficulty.

[0064] In summary, the embodiments of this application can provide a light source module and light source device with a simpler structure, lower switching latency, and easier assembly.

[0065] An endoscope light source device, comprising: the light source module in the above embodiments.

[0066] An endoscope system includes: an endoscope, a display device, and a light source device as described in the above embodiments.

[0067] In some embodiments, the endoscope system further includes an image processing device.

[0068] The beneficial effects of the above-mentioned light source device and endoscope system can be seen in the relevant descriptions of the above-mentioned light source module embodiments. Attached Figure Description

[0069] Figure 1 A schematic diagram of an endoscope system provided for one embodiment;

[0070] Figure 2 This is a schematic diagram of the structure of a light source module provided in one embodiment;

[0071] Figure 3 This is a schematic diagram of another structure of the light source module provided in one embodiment;

[0072] Figure 4 This is a schematic diagram of another structure of the light source module provided in one embodiment;

[0073] Figure 5 This is a schematic diagram of another structure of the light source module provided in one embodiment;

[0074] Figure 6 This is a schematic diagram of another structure of the light source module provided in one embodiment;

[0075] Figure 7 This is a schematic diagram of a scene where the two types of green light provided in one embodiment are narrowband lights;

[0076] Figure 8 This is a schematic diagram of another structure of the light source module provided in one embodiment.

[0077] The markings in the image are as follows:

[0078] 101. Light source equipment; 102. Endoscope; 103. Image processing equipment; 104. Display; 11. Dichroic mirror; 12. Dichroic mirror; 13. Dichroic mirror; 14. Dichroic mirror; 15. Dichroic mirror. Detailed Implementation

[0079] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0080] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0081] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] Please refer to Figure 1 , Figure 1This is a schematic diagram of an endoscope system provided in an embodiment of this application. The endoscope system may include: a light source device 101, an endoscope 102 (or endoscope body), an image processing device 103, and a display 104 (also referred to as a display device). The various devices are described in sequence below:

[0084] For light source device 101:

[0085] The light source device 101 includes an optomechanical module (i.e., the light source module, the core component of the light source device 101, used to provide the required illumination light), a power supply module, and a control module, etc. The light source module includes light source devices (hereinafter referred to as light sources) and optical elements. The light source devices are used to generate beams of specific wavelengths. The number of light source devices can be five or more, and the type of light source devices can be LED light sources or LD laser light sources, etc., without further limitation. The optical elements can include one or more lenses and light combining components, such as, but not limited to, collimating lenses, condensing lenses, dichroic optical elements, and coupling mirror groups; the optical elements can be used to collimate, filter, and combine the beams emitted by the light source devices to achieve beam combining output of the desired specific wavelength beam.

[0086] After the light source device 101 and the endoscope 102 are successfully connected through their respective connecting parts, the light source device 101 can be used to incident the combined beam of light (light) onto the end face of the light guide of the endoscope 102, so that the light beam is emitted from the tip of the endoscope 102, providing illumination for the endoscope 102. For example, when using the endoscope 102 to perform a digestive tract examination, the light source device 101 shines light into the endoscope 102, which is then transmitted through the light guide inside the endoscope 102, and the light is irradiated onto the digestive tract area being observed through the illumination window at the tip of the endoscope 102, thus achieving effective illumination of the digestive tract area.

[0087] In some optional embodiments of this application, the light source device 101 has multiple lighting modes and / or multiple brightness levels to meet different clinical needs. Under different lighting modes, the wavelength range covered by the light emitted by the light source device 101 is not entirely the same; that is, the color of the light emitted by the light source device 101 is not entirely the same under different lighting modes. For example, in some embodiments, the light source device 101 can support a white light mode that emits white light or pseudo-white light, and a special light mode that supports emitting special light (monochromatic light or composite light of other colors besides white). Different brightness levels correspond to differences in the brightness of the light emitted by the light source device 101. This difference in brightness can be achieved by adjusting the luminous power of the light source device, or by other means, such as adjusting the degree of physical obstruction of the emitted light to achieve the final change in brightness. Specific methods are not limited here. This application does not impose excessive limitations on the number of lighting modes and brightness levels supported by the light source device 101; these can be determined according to actual conditions. For example, the light source device 101 can support 3, 4, 5, 6, 7, or more lighting modes. The number of brightness levels in the light source device 101 can be more flexible. For example, in some embodiments, several to dozens of brightness levels can be set for the user to choose from. In other embodiments, in order to support more precise automatic exposure functions, hundreds to thousands of brightness levels can be set for use during automatic adjustment. On this basis, some of the brightness levels can be provided for the user to manually select, thereby meeting the needs of different brightness level adjustments.

[0088] It should be understood that since the endoscope 102 transmits and emits light from the light source device 101, the endoscope 102 can correspondingly be adapted to multiple lighting modes and / or multiple brightness levels, based on the fact that the light source device 101 has multiple lighting modes and / or multiple brightness levels. That is, when the light source device 101 changes its lighting mode and / or brightness level, the color and / or brightness of the light emitted by the endoscope 102 will also be adjusted.

[0089] Regarding endoscope 102:

[0090] The endoscope 102 may include a connecting part, a flexible tube, an operating part, and an elongated insertion part. The connecting part connects to the connecting part of the light source device 101, and the flexible tube contains a light-guiding medium (such as an optical fiber) to transmit light. The light-guiding medium runs through the flexible tube, the operating part, and the insertion part. The operating part includes multiple control knobs or buttons to control the movement of the insertion part. The insertion part includes an insertion tube, a bending part, and a head end. The head end has an illumination window for mounting an illumination module, an imaging window for mounting an imaging module, and an instrument channel window for instrument use. More specifically, the illumination module includes a light-guiding medium and an illumination lens group. The illumination lens group is used to emit the light transmitted by the light-guiding medium at a preset appropriate divergence angle to create a better illumination environment. The imaging module includes an imaging lens group and an image sensor (camera element). The imaging lens group contains multiple lenses, and a cable is located after the image sensor, running through the entire endoscope 102 to transmit uplink image data and downlink command data.

[0091] Endoscopes can be categorized into fixed-focus endoscopes and variable-focus endoscopes (such as bifocal endoscopes and magnifying endoscopes) based on whether they include a zoom function. When endoscope 102 is a fixed-focus endoscope, the spatial positions of the multiple lenses within the imaging lens group are relatively fixed, resulting in a fixed focal length for the entire imaging lens group. When endoscope 102 is a variable-focus endoscope, at least one of the multiple lenses within the imaging lens group is a movable lens, which can move relative to the other lenses, thereby making the focal length of the entire imaging lens group variable.

[0092] For image processing device 103:

[0093] Image processing device 103 is a dedicated processing device specifically designed for endoscope systems. Image processing device 103 can perform image processing on images acquired by endoscope 102 and send the processing results to display 104. Simultaneously, image processing device 103 can also perform image analysis to achieve certain preset functions. For example, in some optional embodiments, image processing device 103 can perform image enhancement processing, physiological part recognition, and other processing. The specific image analysis functions supported by image processing device 103 are not limited here and can be determined according to the actual application.

[0094] In some embodiments, the image processing device 103 and the light source device 101 can be an integrated device (all-in-one machine), that is, a single device has the functions of both the image processing device 103 and the light source device 101.

[0095] For monitor 104:

[0096] Display 104 can be a liquid crystal display (LCD), a light-emitting diode (LED) display, a VR headset, or other display devices with display capabilities. Display 104 can display the image processing results provided by image processing device 103. In some examples, display 104 can display in real time the images captured by the imaging module of endoscope 102, as well as the recognition results (such as lesion recognition) of the images by image processing device 103. In other examples, display 104 can also display a three-dimensional model obtained by image processing device 103 based on the image for three-dimensional reconstruction.

[0097] The following describes the workflow of endoscopic systems in common clinical scenarios:

[0098] During a patient examination, medical personnel (i.e., the user) first connect and start the various devices of the endoscope system, then insert the insertion part into the patient's body. At this time, the light source device 101 shines light into the endoscope 102, which is then emitted from the illumination window at the tip of the endoscope 102 to the physiological part inside the patient's body containing the object to be measured. After being illuminated by the light, the physiological part reflects the illuminated light into the imaging module at the tip. The imaging module generates an image of the physiological part based on the received reflected light and transmits the image to the light source device 101 via a cable. The light source device 101 then transmits the image to the image processing device 103. Finally, the image processing device 103 processes the image and sends it to the display 104 for output display. When it is necessary to highlight specific physiological structures such as blood vessels, a special light mode can be activated. The light source device 101 controls different light sources to turn on or off, thereby achieving the synthesis of special light.

[0099] It should also be noted that, Figure 1This does not constitute a limitation on the endoscope system. In practical applications, the endoscope system may include more or fewer components than illustrated, or combine certain components, or use different components. For example, the endoscope system may also include a trolley, accessory devices (such as a carbon dioxide pump), and AI processing devices (such as an AI host or remote server) specifically for executing artificial intelligence (AI) algorithms, etc., which can be determined according to the actual application. This application does not impose any restrictions on this. In addition, the connection relationships between the various devices may also vary. For example, in some optional embodiments, the endoscope 102 may be communicatively connected to the image processing device 103. In other optional embodiments, when the endoscope system includes an AI processing device, the AI ​​processing device can be placed between the image processing device 103 and the display 104, thereby enabling secondary processing and re-display of the image output by the image processing device 103. Correspondingly, depending on the different connection relationships, the data transmission path of the endoscope 102 will also have adaptive differences, which will not be elaborated here.

[0100] Special lighting modes in endoscopy are extremely important in clinical practice. They can greatly improve the imaging of physiological tissues, such as blood vessels and polyps, making it easier for medical staff to observe the morphology of specific tissues and thus helping them make more accurate and faster judgments.

[0101] In common special light modes such as NBI, RDI, and BLI, multiple light sources of different colors are required to combine and produce light. Furthermore, the wavelengths required for the same color light source can sometimes differ across special light modes. Therefore, existing technologies often use filter switching to achieve this switching. For example, in white light observation mode, a filter switching motor moves the filter out of the optical path; in special light mode 1, the motor moves the corresponding filter 1 into the optical path; and in special light mode N, the motor moves a filter N with different parameters into the optical path. While this allows switching between different wavelengths of the same color light source, it has at least the following drawbacks:

[0102] 1. This increases the volume of the light source structure and makes it more complex.

[0103] 2. The motor has many parts, resulting in a higher risk of failure and poor drop resistance.

[0104] 3. The filter angle may shift after prolonged use.

[0105] 4. There is a delay when switching filters.

[0106] 5. Both material costs and assembly difficulty are relatively high.

[0107] Based on the above, it is clear that there is a need in the existing technology for a light source device with a simpler structure, lower switching latency, and easier assembly to meet practical requirements.

[0108] In practical applications, hemoglobin has absorption peaks in multiple different wavelength bands, mainly including: the band around 415nm, the band between 525nm and 542nm, and the band between 560nm and 577nm. The band around 415nm is located in the violet (ultraviolet) wavelength range, while the bands between 525nm and 542nm and between 560nm and 577nm are mainly located in the green wavelength range. Therefore, in practical applications, the white light mode and the special light mode that can enhance hemoglobin imaging can be controlled by controlling the relevant components of the green light band.

[0109] Based on this, in this embodiment, the light source module includes a purple light source, a blue light source, and a red light source. Simultaneously, two independent light sources (i.e., a first green light source and a second green light source) are provided for green light. These two light sources can be independently controlled to turn on or off, and their power can be independently controlled when on, thus achieving flexible control of the two green lights. Furthermore, the green light emitted by the two green light sources can be full-bandwidth light, full-narrowband light, or a combination of one broadband light and one narrowband light. When broadband light is present, it can be filtered by a beam combining component during reflection or transmission to obtain the desired narrowband light. At least one green light source emits green light that includes all or part of the aforementioned 525nm-542nm or 560nm-577nm wavelength bands. Furthermore, in scenarios where both green light sources are on, the combined beam (i.e., the second combined beam) covers a wider range of green light wavelengths than the first and second green light wavelengths, or the second combined beam contains all green light wavelengths.

[0110] Therefore, this embodiment of the application can activate all light sources in the light source module when a white light mode is needed, providing the necessary blue light, the necessary red light, the violet light that can enhance hemoglobin, and green light across the entire wavelength range (or most wavelength ranges). This ensures the integrity of the white light containing all necessary visible light wavelength components, as well as the ultraviolet light component that can enhance hemoglobin, thus achieving high-quality white light. When a specific special light mode is needed, only the green light source of the required wavelength can be activated, while another green light source can be turned off or controlled to operate at low power. At the same time, some other non-green light sources can be selectively activated according to actual needs, thereby obtaining the required special light. Based on this, narrowband / broadband green light sources can be flexibly selected, and the required narrowband green light can be obtained by filtering when broadband light is available. Therefore, the requirements for green light source components can be greatly reduced, achieving low-cost special light acquisition.

[0111] As the above analysis shows, the embodiments of this application can achieve the desired white light mode and special light mode illumination by selectively turning on the required green light source, without the need for filter switching and motor-related structures. Therefore, the related structures required for special light can be greatly simplified, and the assembly difficulty is significantly reduced. Due to the effective simplification of the structure, the optomechanical module of the embodiments of this application has a lower failure rate and better stability, while also effectively reducing material costs.

[0112] Meanwhile, since the lighting mode can be switched by controlling the on and off of different light sources instead of switching motors, different monochromatic light source spectra can be obtained for different special light observation modes. Therefore, there is no time delay caused by physical motor switching, which means that a lower switching delay can be achieved.

[0113] Furthermore, the embodiments of this application can be compatible with different green light sources, thus allowing for more freedom and flexibility in the selection of green light source components in practical applications. This reduces the cost of green light sources required for special lighting, thereby further reducing the difficulty of material preparation and assembly.

[0114] In summary, the embodiments of this application can provide a light source module and light source device with a simpler structure, lower switching latency, and easier assembly.

[0115] The light source type in this application embodiment can be an LED light source or an LD laser light source, etc. For ease of explanation, the following description uses an LED light source as an example. In this application embodiment, the light source module includes:

[0116] A purple light source, used to generate purple light.

[0117] Blue light source, used to generate blue light.

[0118] The first green light source is used to generate the first green light.

[0119] The second green light source is used to generate the second green light.

[0120] A red light source is used to generate red light.

[0121] The first light combining component is used to combine purple light, blue light and first green light to obtain a first combined beam.

[0122] The second beam combining component is used to combine the first beam, the second green light, and the red light to obtain illumination light.

[0123] The second light-combining component includes: the target light-combining component.

[0124] The target beam combining component is used to transmit one of the first beam combining light and the second green light and reflect the other, and combine the first beam combining light and the second green light to obtain the second beam combining light; the green light band covered by the second beam combining light is wider than the band range of the first green light and wider than the band range of the second green light, or the second beam combining light covers all green light bands.

[0125] In this process, the first green light and the second green light contain broadband light, and the target light combining component is also used to filter out part of the green light band of the broadband light in the first green light and the second green light when transmitting and / or reflecting light; or, the first green light and the second green light are both narrowband light.

[0126] In this embodiment, the light source module is provided with at least five light sources of four colors: purple light source, blue light source, first green light source, second green light source and red light source.

[0127] The violet light source (V LED, also known as an ultraviolet light source) is used to provide light in the violet wavelength range. Provided that it includes violet light with a wavelength of 415nm, this application embodiment does not impose excessive limitations on the actual violet light wavelength range that the violet light source can emit. For example, for better imaging, in some embodiments, the violet light emitted by the violet light source and the light emitted via the second light combining component (when the violet light source is on) both contain light with a wavelength of at least 415nm. In some embodiments, the violet light source can emit violet light containing wavelengths of 380nm-450nm, 395-430nm, or 400nm-420nm. In some embodiments, after processing by various optical elements, the final emitted illumination light contains violet light with a wavelength range less than 430nm but including 415nm.

[0128] Blue light sources (B LEDs) are used to provide light in the blue light band, and the emitted blue light can cover all or most of the blue light band. Therefore, this application does not impose excessive limitations on the actual blue light band that the blue light source can emit, and it can be selected according to actual conditions. For example, in some embodiments, the blue light source can emit blue light including the 430nm-480nm, 430nm-495nm, 435nm-480nm, or 435nm-495nm bands. In some embodiments, after processing by various optical elements, the final emitted light contains a blue light band of 430nm-480nm.

[0129] A red light source (R LED) is used to provide light in the red light band, and the emitted red light covers all or most of the visible red light band. Therefore, this application embodiment does not impose excessive limitations on the actual red light band that the red light source can emit, and it can be selected according to actual conditions. In some embodiments, the red light source can emit all red light bands above 610nm. In some embodiments, after processing by various optical elements, the final emitted light contains red light in all visible light bands above 610nm.

[0130] The first green light source (G1LED) is used to provide green light with a relatively short wavelength in the green light band. Specifically, the first green light directly emitted by the first green light source, and the light finally emitted after the first green light is processed by various optical elements when the first green light source is turned on, both cover at least part or all of the green light in the 525nm-542nm wavelength band. Based on this, the embodiments of this application do not impose too many limitations on the actual green light band that the first green light source can emit. For example, the first green light can be broadband light or narrowband light. In some embodiments, the first green light source can emit green light including the 480nm-540nm, 480nm-610nm, 495nm-540nm, 495nm-610nm, or 495nm-570nm wavelength bands. In some embodiments, the light finally emitted after the first green light is processed by various optical elements includes green light in the entire 525nm-542nm wavelength band, for example, green light in the remaining 480nm-540nm wavelength band after the first green light is processed by various optical elements.

[0131] The second green light source (G2LED) is used to provide green light with a relatively long wavelength in the green light band. Specifically, the second green light directly emitted by the second green light source, and the light emitted after the second green light is processed by various optical elements when the second green light source is turned on, both cover at least part or all of the green light in the 560nm-577nm wavelength band. Based on this, the embodiments of this application do not impose too many limitations on the actual green light band that the second green light source can emit. For example, the second green light can be broadband light or narrowband light. In some embodiments, the second green light source can emit green light including the 540nm-600nm, 480nm-610nm, 540nm-570nm, 480nm-570nm, or 495nm-570nm wavelength bands. In some embodiments, the light emitted after the second green light is processed by various optical elements includes all the green light in the 560nm-577nm wavelength band, for example, the remaining green light in the 540nm-600nm wavelength band after the second green light is processed by various optical elements.

[0132] Understandably, combining different light rays involves mixing them to obtain a composite light (beam-combined light) that includes all the light rays before mixing. Therefore, unless otherwise specified, the transmission, reflection, and beam-combining processes of the composite light are also corresponding processes for the different wavelengths of light within that composite light. For example, if the first beam-combined light contains first green light, then when performing transmission / reflection / beam-combining processes on the first beam-combined light, the first green light within it is also being processed. Similarly, when combining the transmitted first beam-combined light and the reflected second green light, the first green light and the second green light within the first beam-combined light are also being combined.

[0133] In this embodiment, the light-combining component has the function of combining multiple light beams. Based on this, this embodiment does not impose excessive limitations on the number or type of optical elements specifically included in the light-combining component. That is, the light-combining component can be a single optical element or a collective term for multiple optical elements, which can be determined according to the actual needs of each light-combining component. Specifically:

[0134] One of the main functions of the first light-combining component is to combine violet light, blue light, and the first green light. Based on this, specific light-combining elements can be flexibly selected and set. For example, in some embodiments, only one light-combining element can be set, such as a single dichroic optical element (e.g., a dichroic mirror or dichroic prism) or a prism. The violet light and blue light enter the light-combining element from the same direction, while the first green light enters the light-combining element from another direction. The light-combining element reflects or transmits the incoming light rays and then combines them to obtain the combined light (i.e., the first light-combining component).

[0135] For example, in some other alternative embodiments, reference can be made to Figures 2 to 6 The diagram shows the structural schematics of several light source modules provided in some embodiments of this application. In these schematic structures, the first light combining component includes a dichroic mirror 11 and a dichroic mirror 12. Figures 2 to 4 In the illustrated embodiment, dichroic mirror 11 is used to combine violet and blue light, and dichroic mirror 12 is used to combine the combined violet and blue light with the first green light to obtain the desired first combined beam. In some optional embodiments, Figures 2 to 4 The film parameters of the dichroic mirror 11 in the illustrated embodiment are: reflection 430nm-670nm, transmission 380nm-430nm, and the film parameters of the dichroic mirror 12 are: 380nm-485nm, transmission 485nm-670nm. While... Figure 5 and Figure 6In the illustrated embodiment, the dichroic mirror 12 is used to combine the first green light and the blue light, while the dichroic mirror 11 is used to combine the combined first green light and the blue light with the violet light to obtain the desired first combined beam.

[0136] In the embodiments of this application, the target light combining component may transmit the first combined light and reflect the second green light; or it may reflect the first combined light and transmit the second green light. The specific method can be determined according to the actual optical path design, and no further limitations are made here. The following examples illustrate the scenario where the target light combining component transmits the first combined light and reflects the second green light.

[0137] One of the main functions of the target beam combining component is to simultaneously transmit one of the first combined beam and the second green light while reflecting the other, thereby combining the first combined beam and the second green light to obtain a second combined beam containing the complete green light wavelength band. Another main function is that when broadband light exists in the first and second green lights, the target beam combining component can also filter the broadband light in the first and second green lights during transmission and / or reflection, filtering out a portion of the green light wavelength band, thus transforming the broadband light into green light that can be combined with another green light to cover most or all of the green light wavelength band. It is understood that when both the first and second green lights are narrowband lights, the target beam combining component may or may not have the corresponding partial green light wavelength band filtering function.

[0138] Understandably, in order to ensure the quality of the synthesized white light in the white light mode, the target light combining component in this application embodiment must, when filtering broadband light, ensure that the filtered wavelength can cover most or all of the green light wavelengths after being combined with another green light, thereby ensuring the relative integrity of the green light wavelengths when the white light is combined, so that the quality of the white light can be guaranteed.

[0139] Specifically, in this embodiment, the second combined light covers a wider range of green light wavelengths than both the first and second green light wavelengths, or the second combined light covers all green light wavelengths. In one possibility, the second combined light, after filtering out green light wavelengths, can still completely cover both the first and second green light wavelengths, having a wider wavelength range than both. Therefore, when combining white light, it can provide a more comprehensive green light wavelength range, achieving coverage of most green light wavelengths. In another possibility, the second combined light may already cover all green light wavelengths; that is, after filtering and combining, the first and second green light can cover all green light wavelengths.

[0140] Alternatively, in some optional embodiments, the proportion of the green light band covered by the second beam combiner can be set to be greater than or equal to a preset proportion threshold to ensure that the white light beam combiner can contain at least most of the green light band, thus guaranteeing the quality of the white light. In some embodiments, the preset proportion threshold can be any value between 60% and 100%, or any value between 75% and 100%. For example, when the preset proportion threshold is 75%, the second beam combiner must cover at least 75% of the green light band, meaning the final white light contains at least 75% of the green light band, thus maintaining good quality. As another example, when the preset proportion threshold is 100%, the second beam combiner must cover all green light bands.

[0141] Furthermore, it's understandable that in practical applications, it's not only necessary to ensure the relative integrity of the wavelengths after the two green lights are combined, but also to ensure the uniformity of the overall green light intensity in white light mode (i.e., the intensity difference within the green light band should not be too large). This is to prevent uneven green light in white light mode from causing color shifts in the illumination (e.g., a greenish tint). Therefore, if broadband light exists in the first and second green lights, it's also necessary to filter the broadband light to avoid poor uniformity of green light intensity that might result from directly superimposing some wavelengths of green light onto the broadband light.

[0142] In addition, as an optional embodiment of this application, for cases where broadband light is present, the band overlap rate between the two green lights during beam combining (for broadband light, this refers to green light that retains a portion of its wavelength after filtering) is small, specifically less than a preset overlap rate threshold. The specific value of the overlap rate threshold can be set according to actual conditions; for example, in some optional embodiments, the overlap rate threshold can be 0 (where there is no overlap between the two green lights during beam combining), 5%, 10%, or 15%, etc. The advantages here are: 1. The two green light bands are relatively independent and have virtually no overlap. Furthermore, they each contain part or all of the 525nm-542nm and 560nm-577nm bands, respectively, and therefore can both serve as the base green light for special light modes. That is, this embodiment of the application can flexibly utilize the two green lights to achieve different special light modes. 2. The intensity of the portion of the two green lights retained for beam combining can be controlled relatively independently, and the mutual interference is small; that is, the area affected by the overlapping portion after beam combining is small. Therefore, the overall light intensity uniformity and controllability of the green light band after light combination are also higher, and better light intensity uniformity can be achieved within the green light band.

[0143] Based on meeting the functional requirements of the target light-combining component, the target light-combining component can be a single optical element or a combination of multiple optical elements. For example, in some embodiments, the target light-combining component can include multiple optical elements such as a filter element (e.g., a dedicated filter or other filter element with filtering function) and a dichroic mirror, thereby separating the filtering and light-combining functions. In this case, the performance requirements of the optical elements are relatively low, resulting in lower costs. In other embodiments, the target light-combining component is a dichroic optical element with filtering function, such as a monolithic dichroic mirror, which can achieve the filtering function by coating one or both sides of the dichroic mirror.

[0144] For example, you can refer to Figures 2 to 4 In the illustrated embodiments, the target light-combining part is a dichroic mirror 13. That is, the dichroic mirror 13 performs the functions of transmitting the first combined light, reflecting the second green light, combining the transmitted first combined light and the reflected second green light, and filtering a portion of the broadband light in the first and second green light (if broadband light is present). In some optional embodiments, Figures 2 to 4 The film parameters of the dichroic mirror 13 in the embodiment shown are: reflection 540nm-670nm, transmission 380nm-540nm.

[0145] exist Figures 5 to 6 In the illustrated embodiment, the target light-combining part can be a dichroic mirror 14, and the function of the dichroic mirror 14 can be referred to Figures 2 to 4 The description of the dichroic mirror 13 in the illustrated embodiment will not be repeated here. Alternatively, in Figures 5 to 6 In the illustrated embodiment, the target light combining section may also include both a dichroic mirror 13 and a dichroic mirror 14. In this case, the dichroic mirror 13 can filter part of the green light band (if broadband light exists) in the first and second green lights, while the dichroic mirror 14 is responsible for transmitting the first combined light, reflecting the second green light, and combining the transmitted first combined light and the reflected second green light. That is, the light combining function and the filtering function are implemented by different optical elements.

[0146] The second beam combining component is a collective term for all optical elements related to the beam combining of the first beam combining light, the second green light, and the red light. It may include other optical elements in addition to the target beam combining component, or it may only include the target beam combining component. We will not make any further distinctions here.

[0147] In some embodiments, the first combined beam, the second green light, and the red light can be combined multiple times. For example, in some optional embodiments, the first combined beam and the second green light can be combined first to obtain a second combined beam, and then the second combined beam can be combined with the red light to obtain a new combined beam. See also... Figures 2 to 4In the illustrated embodiment, the second beam combining component includes a dichroic mirror 13 and a dichroic mirror 14. In this case, the dichroic mirror 13 combines the first beam combining light and the second green light to obtain the second beam combining light; conversely, the dichroic mirror 14 combines the second beam combining light with red light. In some optional embodiments, Figures 2 to 4 The film parameters of the dichroic mirror 14 in the illustrated embodiment are: reflection 380nm-600nm, transmission 600nm-670nm. In some optional embodiments, Figure 3 The film parameters of the dichroic mirror 15 in the illustrated embodiment are: reflection 380nm-610nm, transmission 610nm-670nm. In some optional embodiments, Figure 4 The film parameters of the dichroic mirror 15 in the embodiment shown are: reflection 610nm-670nm, transmission 380nm-610nm.

[0148] In some alternative embodiments, the second green light and the red light can be combined first, and then the resulting combined beam can be combined with the first combined beam to obtain the second combined beam, which in this case already contains red light. For example, see [reference needed]. Figures 5 to 6 In the embodiment shown, the second beam combining component includes a dichroic mirror 13 and a dichroic mirror 14. In this case, the second green light and the red light are first combined by the dichroic mirror 13, and then the combined light obtained is combined with the first beam combining by the dichroic mirror 14 to obtain the second beam combining.

[0149] As can be seen from the above analysis, when the red light is combined with the first beam and the second green light before the red light is combined, the second beam already contains the red light. However, when the first beam and the second green light are combined first, the embodiments of this application will further combine the second beam and the combined light to obtain the desired illumination light.

[0150] It should be understood that the above descriptions of each light-combining component are based on the scenario where all light source modes are activated. In actual applications, the type and number of light sources activated each time will vary depending on the lighting mode used. However, it is understandable that activating different light sources will not affect the original function of each optical element, but only the actual light and processing involved in that function. For example, for the first light-combining component, assuming the purple light source is not activated and all other light sources are activated normally, the function of the first light-combining component is still to combine the purple light, the blue light, and the first green light. However, since the purple light source is not activated, it actually combines the blue light and the first green light, and the resulting beam does not contain the purple light emitted by the purple light source. On the other hand, for light, the composition of the light within the light source module will change depending on the activated light source. For example, when the purple light source is activated, the subsequent beam does not contain the purple light emitted by the purple light source, and when one or both of the first and second green light sources are activated, the subsequent beam will also lack the green light emitted by the activated green light source. For example, assuming the first green light source is off and the second green light source is on, the subsequent combined beam will not contain any green light component emitted by the first green light source.

[0151] Based on the above structure, the light source module of this application embodiment includes a purple light source, a blue light source, and a red light source. Simultaneously, two independent light sources (i.e., a first green light source and a second green light source) are provided for green light. These two light sources can be independently controlled to turn on or off, and their power can be independently controlled when on, thereby achieving flexible control of the two green lights. Furthermore, the two green light sources can be full broadband light, full narrowband light, or a combination of one broadband light and one narrowband light. When broadband light is present, a light combining component can filter the broadband light during reflection or transmission to obtain the desired narrowband light segment.

[0152] Therefore, this application embodiment can activate the blue light source, the first green light source, the second green light source, and the red light source when a white light mode is needed, providing the necessary blue light, the necessary red light, and the necessary green light (including most or all of the green light bands). Alternatively, it can select to activate all light sources in the light source module during white light mode, providing the necessary blue light, the necessary red light, the violet light that can enhance hemoglobin, and the necessary green light, thereby ensuring the relative integrity of the necessary visible light band components in the white light and the ultraviolet light component that can enhance hemoglobin, thus achieving high-quality white light. When a special light mode is needed, the required green light source band can be activated, while another green light source can be turned off or controlled to operate at low power. At the same time, some other non-green light sources can be selectively activated according to actual needs, thereby obtaining the required special light. Based on this, narrowband / broadband green light sources can be flexibly selected, and the required narrowband green light can be obtained by filtering when broadband light is available. Therefore, the requirements for green light source components can be greatly reduced, achieving low-cost special light acquisition.

[0153] As the above analysis shows, the embodiments of this application can achieve the desired white light mode and special light mode illumination by selectively turning on the required green light source, without the need for filter switching and motor-related structures. Therefore, the related structures required for special light can be greatly simplified, and the assembly difficulty is significantly reduced. Due to the effective simplification of the structure, the optomechanical module of the embodiments of this application has a lower failure rate and better stability, while also effectively reducing material costs.

[0154] Meanwhile, since the lighting mode can be switched by controlling the on and off of different light sources instead of switching motors, different monochromatic light source spectra can be obtained for different special light observation modes. Therefore, there is no time delay caused by physical motor switching, which means that a lower switching delay can be achieved.

[0155] Furthermore, the embodiments of this application can be compatible with different green light sources, thus allowing for more freedom and flexibility in the selection of green light source components in practical applications. This reduces the cost of green light sources required for special lighting, thereby further reducing the difficulty of material preparation and assembly.

[0156] In summary, the embodiments of this application can provide a light source module and light source device with a simpler structure, lower switching latency, and easier assembly. As an optional embodiment of this application, the light source module further includes:

[0157] An amber-colored light source (A LED) is used to generate amber light; the second light combining component is specifically used to combine the first combined light beam, the second green light, the red light, and the amber light to obtain illumination light. The amber-colored light source can be an independent light source or the same light source as the red light source.

[0158] In this embodiment, the amber light source can be an independent light source. In this case, the light source module includes a violet light source, a blue light source, a first green light source, a second green light source, a red light source, and an amber light source, totaling six light sources of five colors. Alternatively, it can extend the wavelength of the light emitted by the original red light source so that it can emit light including the amber light wavelength. In this case, the amber light source and the red light source are the same light source. Accordingly, the light source module includes a violet light source, a blue light source, a first green light source, a second green light source, and a red light source (i.e., an amber light source), totaling five light sources of five colors.

[0159] Compared to the aforementioned embodiments, the advantage of adding an amber light source is that red light (R), due to its longer wavelength, has stronger penetrating power. The difference in absorbance of red light between hemoglobin (blood vessels) and surrounding tissues is small, and both absorb almost no red light. Amber light (A), with a slightly shorter wavelength than R light, still ensures a certain degree of depth penetration. Furthermore, the difference in absorbance of amber light between hemoglobin and surrounding tissues is significant; hemoglobin absorbs amber light more readily than the surrounding tissues, thus better highlighting the contrast between areas with and without hemoglobin. In other words, increasing the illumination with longer-wavelength light (amber light) enhances information about deeper tissues. While presenting an image with a near-natural white tone, it can precisely emphasize subtle color differences in the blood.

[0160] As an optional embodiment of this application, the amber light emitted by the amber light source, and the final illumination light emitted when the amber light source is turned on, both cover part or all of the amber light in the 600nm-610nm wavelength band. Considering factors such as the diameter of capillaries and large blood vessels, the absorbance curve of oxyhemoglobin / deoxyhemoglobin, and the concentration of hemoglobin in the blood, setting the wavelength center of the amber light around 600nm can maximize the difference in absorbance between capillaries and large blood vessels. Therefore, the amber light in the 600nm-610nm wavelength band of this embodiment can achieve better imaging of blood vessels.

[0161] As an optional embodiment of this application, the first green light source is a fluorescent excitation light source, the first green light is broadband light obtained based on blue light or violet light excitation, and the first light combining component includes:

[0162] A target dichroic mirror is used to filter out light with wavelengths shorter than the green light wavelength in the first green light, and to combine blue light and the filtered first green light.

[0163] In the LED product field, to obtain better broadband green light, blue or violet LEDs are generally used to excite green fluorescence, resulting in broadband green light with a wider spectrum and better quality. However, this also leads to the broadband green light containing inherent blue or violet light, causing blue or violet wavelengths to be mixed in the first green light, thus reducing its quality. To solve this problem, dedicated filters are generally needed to remove blue or violet light, but this increases the complexity of the light source module structure and hinders design simplification. On the other hand, considering that dichroic mirrors typically set the cutoff band at the boundary between the blue and green light bands when synthesizing blue and green light, the dichroic mirror used for combining blue and green light often also has a cutoff effect on blue light in the green light. Therefore, this application's embodiment reuses the target dichroic mirror originally used for synthesizing blue and first green light as a filter for blue light in the first green light. This eliminates the need for a dedicated filter and reduces the cost of additional filter design, effectively simplifying the structural design and reducing structural costs.

[0164] As an embodiment of this application, and as can be seen from the above description, the first green light source and the second green light source can be freely configured as broadband light sources and narrowband light sources. Based on this, each configuration will be described in detail below with reference to the embodiments:

[0165] Scenario 1: Both the first and second green lights are broadband lights;

[0166] In some embodiments, the green light emitted by the first green light source and the second green light source is both broadband light, and in this case, the target light combining component is specifically used for:

[0167] When transmitting or reflecting the first combined light, light with wavelengths longer than the first threshold wavelength is filtered out. When transmitting or reflecting the second green light, light with wavelengths shorter than the first threshold wavelength is filtered out. The filtered first combined light and the filtered second green light are then combined to obtain the second combined light. The first threshold is any wavelength value in the green light band.

[0168] In this embodiment, both the first green light and the second green light are broadband lights. Simultaneously, the target beam combining component can perform short-pass filtering on the first combined light and long-pass filtering on the second green light based on the same cutoff wavelength. This allows for effective segmentation of the green light band, enabling each green light source to provide one side of the green light band. The advantages of this embodiment are:

[0169] 1. By using a first threshold to divide two green lights into long-wavelength and short-wavelength green lights, the requirements of white light mode and special light mode for different wavelengths of green light can be met. Based on this, green broadband light source products are relatively mature, with lower costs compared to specific narrowband lights, and less optical design complexity. For example, the market for green broadband LED products is highly mature, and their cost is much lower than that of narrowband light sources for specific green light bands. Therefore, while meeting the lighting requirements of white light mode and special light mode, the cost of green light sources can be greatly reduced, thereby reducing the overall cost of light source modules and equipment.

[0170] 2. In practical applications, white light mode requires most or all of the green light band to ensure white light quality, and generally requires relatively uniform light intensity within the green light band to avoid potential color shift. Since the intensity of broadband green light is relatively uniform in practical applications, using two broadband green lights to filter out both long and short wavelengths and then combining them can better control the overall intensity uniformity and integrity of the green light band in the combined beam, thereby reducing the design difficulty of obtaining high-quality white light.

[0171] As one embodiment of this application, to ensure that the filtered first green light contains all or part of the wavelength band between 525nm and 542nm, and the filtered second green light contains all or part of the wavelength band between 560nm and 577nm, so that the two filtered green lights can be used as the green light required for a specific light, in this embodiment of the application, the first threshold is any value between 535nm and 570nm. Based on this, it can be ensured that the two filtered green lights contain at least the hemoglobin absorption peak wavelength band of 7nm-10nm.

[0172] As an optional embodiment of this application, the first threshold is any value within the range of 540nm-560nm. Therefore, when filtering two green lights based on the first threshold, the filtered first green light can contain all or most of the wavelength band within the 525nm-542nm range, while the filtered second green light can contain all the wavelength bands within the 560nm-577nm range. Based on this, embodiments of this application can provide two segments of high-quality green light suitable for special light synthesis, thereby improving the quality of special light.

[0173] As an optional embodiment of this application, the first green light source and the second green light source are the same or different green light sources, and the first green light contains all green light bands with wavelengths shorter than the first threshold, and the second green light contains all green light bands with wavelengths longer than the first threshold.

[0174] As the above analysis shows, the first green light is mainly used to provide green light segments with relatively short wavelengths, while the second green light provides green light segments with relatively long wavelengths. Therefore, in order to ensure the quality of the final white light in this embodiment, the selected first green light includes all green light bands with wavelengths shorter than the first threshold, while the second green light includes all green light bands with wavelengths longer than the first threshold. Thus, even after filtering through the first threshold, a complete green light band can still be obtained by combining them. Based on this, the selection of green light sources in this embodiment is essentially unrestricted. That is, in practical applications, technicians can flexibly select the two green light sources according to actual needs, and are largely unaffected by the quality differences between different batches of light sources. For example, in some embodiments, two identical green light sources covering the complete green light band can be selected, such as two green LEDs of the same model from the same batch or different models. In other optional embodiments, two different models of green LEDs can also be selected.

[0175] In summary, the embodiments of this application exhibit strong compatibility with green light sources. As long as the required long and short wavelengths are included respectively, and a complete green light band can be synthesized, any green light source with arbitrary configuration and emission characteristics can be selected. This greatly reduces the requirements for green light sources, thereby increasing the flexibility in selecting actual light source components and reducing costs.

[0176] Scenario 2: Both the first and second green lights are narrowband lights.

[0177] When both the first green light and the second green light are narrowband lights, there is partial overlap of the green light bands in the first combined light and the second green light. In the green light band of the second combined light, the light intensity in the full width at half maximum (FWHM) range is greater than the light intensity corresponding to the FWHM.

[0178] The advantage of narrowband light lies in its ability to directly provide the specific green light band required for special light without the need for additional filters, thus simplifying optical path design. Furthermore, the elimination of filters reduces the requirements for optical path design and manufacturing processes, resulting in overall cost reduction. Therefore, in this embodiment, both green lights are narrowband lights, simplifying the optical path and reducing costs. As one embodiment, the first green light includes all or part of the 525nm-542nm wavelength range, while the second green light may include all or part of the 560nm-577nm wavelength range.

[0179] Meanwhile, the first combined beam and the second green beam have a partial overlap in the green light band to ensure that the two beams can cover the entire green light band when combined.

[0180] Based on this, to ensure the availability of light intensity within the green light band after beam combining and thus the quality of the final white light, in this embodiment, the light intensity within the green light band of the second beam combining light is greater than the light intensity corresponding to the full width at half maximum (FWHM) of the beam. Specifically, each of the two narrowband lights has a specific peak. During beam combining, the light intensity in the band between the two peaks is often relatively weaker than the light intensity at the two peaks, resulting in a trough between the two peaks after beam combining. This means that there is a significant intensity dip near the center band of the beam combining light (the light intensity in the middle drops significantly, weaker than the sides). If the light intensity in the band around the trough is too weak, it will lead to uneven green light composition and poor white light quality during synthesis. Therefore, this embodiment selects the light intensity distribution characteristics of the two green narrowband lights so that the light intensity within the green light band of the synthesized second beam combining light is greater than the light intensity corresponding to the full width at half maximum (FWHM) of the beam, thereby making the light intensity within the green light band of the beam combining light relatively uniform and usable, and improving the quality of the white light.

[0181] The full width at half maximum (FWHM), also known as half-peak width, half-peak width, or region width, refers to the peak width at half the height of a chromatographic peak. It is calculated by drawing a straight line parallel to the base of the peak through the midpoint of the peak height, and finding the distance between the two points where this line intersects the peak. The full width at half maximum (FWHM) is half the peak height.

[0182] An example will be provided for illustration; please refer to [the example]. Figure 7 This is a schematic diagram of a scene where both green lights provided in the embodiments of this application are narrowband lights. Figure 7 In the image, both the first and second green lights are narrowband lights. There is partial overlap in the green light bands of the first and second green lights. The combined light from the first and second green lights has a peak intensity of 12.5 units and a corresponding full width at half maximum (FWHM) of 6.25 units. Let the two wavelengths corresponding to the FWHM be a and b. The corresponding FWHM in this case is the band from a to b. Figure 8 It can be seen that the light intensity of the combined light at each wavelength within the band from a to b is stronger than the full width at half maximum (FWHM): 6.25 units. Therefore, when using the combined light in white light mode, the quality of the green wavelength light can be guaranteed, thus ensuring the quality of the white light.

[0183] Case 3: The first green light is broadband light, and the second green light is narrowband light.

[0184] When the first green light is broadband light and the second green light is narrowband light, the target light combining component is specifically used to: filter out light with wavelengths longer than the first threshold wavelength when transmitting or reflecting the first combined light, transmit or reflect the second green light, and combine the filtered first combined light and the second green light to obtain the second combined light, wherein the first threshold is any wavelength value in the green light band.

[0185] Case 4: The first green light is narrowband light, and the second green light is broadband light.

[0186] When the first green light is narrowband light and the second green light is broadband light, the target light combining component is specifically used to: transmit or reflect the first combined light, filter out light with wavelengths shorter than the first threshold wavelength when transmitting or reflecting the second green light, and combine the first combined light and the filtered second green light to obtain the second combined light, where the first threshold is any wavelength value in the green light band.

[0187] In scenarios three and four, combining the advantages of broadband and narrowband light, one green light source is chosen as a narrowband source, and the other as a broadband source. For the broadband source, complementary green light bands are extracted through filtering, ensuring the complete green light band required for white light synthesis, while also obtaining different green light bands needed for specific light applications. The advantages are: broadband sources offer greater flexibility in selection, reducing related costs (see the explanation of scenario one above for a detailed analysis); narrowband sources allow for more precise band selection based on requirements, achieving accurate narrowband light while reducing structural complexity.

[0188] Furthermore, for some practical applications where special light synthesis is performed using either the 525nm-542nm or 560nm-577nm bands, this application embodiment can select narrowband light in the required band and broadband light with filtering for the other band with relatively lower requirements. This achieves accurate generation of the green light band required for the special light while reducing the cost of the other green light source, thus achieving compatibility between the special light performance and the overall cost.

[0189] As an optional embodiment of this application, based on the embodiments shown in Situations 3 and 4, this embodiment still satisfies the following condition: within the green light band of the second combined beam, the light intensity across the full width at half maximum (FWHM) is greater than the light intensity corresponding to the FWHM. Therefore, this embodiment can improve the overall availability of the green light band, thereby improving the quality of white light. For details, please refer to the description of the relevant embodiment in Situation 2.

[0190] As an optional embodiment of this application, provided that the above embodiments can effectively obtain the green light band containing the hemoglobin absorption peak, this application embodiment can use these special green light bands to realize different special light modes, thereby meeting various practical clinical needs. Specifically, this application embodiment refers to the special light modes containing the absorption peak in the 525nm-542nm band as the first type of special light mode, and the special light modes containing the absorption peak in the 560nm-577nm band as the second type of special light mode. Each type of special light mode can further include one or more specific special light modules. Details are as follows:

[0191] In some alternative embodiments, the illumination modes of the light source module include: a white light mode and a first type of special light mode. The first type of special light mode includes several seed special light modes.

[0192] In white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on.

[0193] In the first type of special light mode, the first green light source is turned on, and the remaining light sources are partially turned on.

[0194] This application primarily utilizes green light in the 525nm-542nm wavelength band to synthesize special light. Specifically, for white light mode, this application uses a blue light source, a first green light source, a second green light source, and a red light source to synthesize white light. Other light sources can be selectively activated as needed. For example, in some embodiments, all light sources can be activated in white light mode. For non-green light, after processing by optical elements, each color of light source can provide monochromatic light of its corresponding color. For green light, the green light emitted from two green light sources, after filtering (this operation is unnecessary if both are narrowband lights) and combining, can provide green light with a relatively complete wavelength band. Simultaneously, since this application introduces violet light containing an absorption peak in the 415nm wavelength band, better imaging results can be achieved even in white light mode, which is beneficial for the observation and image analysis of physiological tissues. In some embodiments, if an amber light source is also provided within the light source module, the amber light source will also be activated, thereby providing corresponding amber light integrated into the white light, further improving the quality of white light imaging of blood vessels. In some alternative embodiments, the light source module emits white illumination light in the visible light band of 380nm-680nm.

[0195] For the first type of special light, the embodiments of this application will turn on the first green light source to provide the required first green light. Based on this, other lights of different colors can be combined according to actual needs to achieve different physiological tissue highlighting effects. For example, in some optional embodiments: the first type of special light mode includes at least one of a first sub-special light mode, a second sub-special light mode, and a third sub-special light mode.

[0196] In the first special light mode, both the purple light source and the first green light source are turned on, and the light output of the blue light source, the second green light source, and the red light source is less than the preset light output.

[0197] In the second special light mode, both the first green light source and the red light source are turned on, and the light output of the purple light source, the blue light source and the second green light source is less than the preset light output.

[0198] In the third special light mode, the purple light source, the first green light source, and the second green light source are all turned on, and the light output of the blue light source and the red light source is less than the preset light output.

[0199] In the first special light mode, the violet and green light sources are illuminated. Violet light has relatively weak penetration into physiological tissues, shallow penetration depth, and less scattering. It is mainly absorbed by hemoglobin in the capillaries of the mucosal surface, making superficial vessels appear dark brown or black, clearly displaying the fine structure of the mucosal surface and superficial vessels. Green light in the 525nm-542nm band has relatively strong penetration, reaching the submucosal layer, displaying thicker vessels, appearing green or gray, creating a layered contrast with the superficial vessels. Both violet and green light in the 525nm-542nm band contain hemoglobin absorption peaks; therefore, the combined beam of both can achieve clear observation of superficial and mid-deep vessels, thus achieving good imaging observation of the fine vessels in the mucosal surface. Meanwhile, the output of the blue, second green, and red light sources is weak or even zero (i.e., controlled to be less than the preset output), thereby minimizing the impact of these unnecessary light sources in the current special light mode.

[0200] In the second special light mode, the red light source and the first green light source are illuminated. The red light source has relatively strong penetrating power into physiological tissues, so when used in combination with the first green light, the combined beam can achieve good imaging observation of deep, large blood vessels and bleeding points. At the same time, the output of the purple light source, blue light source, and second green light source is weak or even zero (i.e., controlled to be less than the preset output), thereby minimizing the impact of these unnecessary light sources in the current special light mode.

[0201] In the third sub-special light mode, the purple light source, the first green light source, and the second green light source are illuminated, while the output of the blue and red light sources is less than the preset output, thereby minimizing the impact of these unnecessary light sources in the current special light mode. Considering that in practical applications, short-wavelength scattering is more severe than long-wavelength scattering, easily leading to dark images and difficulty in seeing distant objects, while increasing the light source power can improve brightness, it may also introduce other problems such as accelerated light source aging. Therefore, this application's embodiment introduces a second green light source based on the first sub-special light mode. Its advantages are twofold: firstly, it can simultaneously cover the three different absorption peaks of hemoglobin, thus enabling clear observation of the fine structures of the mucosal surface, superficial, and mid-to-deep blood vessels; secondly, the introduction of the relatively longer wavelength of the second green light can effectively improve image brightness, thereby improving the imaging quality of distant objects and making them clearer.

[0202] In the above embodiments, the preset light output can be a fixed value or a proportional value relative to other light sources. The specific size of the fixed or proportional value is not limited here. For example, in some embodiments, the preset light output of each light source can be any value lower than its lowest light output value in white light mode. For instance, assuming the lowest light output value of a certain color light source in white light mode is M, when the current special light does not require the use of this color light source, the preset light output of that color light source can be any value less than or equal to M (e.g., 0). In other embodiments, the preset light output can be 1 / n of the current green light source's light output, where n is any value greater than or equal to 5. For example, the preset light output can be 1 / 5 or 1 / 10 of the current green light source's light output, etc.

[0203] As an optional embodiment of this application, the light source module further includes: an amber light source for generating amber light. In the second sub-special light mode, the first green light source, the red light source, and the amber light source are all turned on, and the light output of the purple light source, the blue light source, and the second green light source is less than the preset light output.

[0204] The amber light source can be a standalone light source or a red light source that emits amber light wavelengths, meaning it is the same light source as the red light source. For details, please refer to the aforementioned embodiments related to the amber light source; they will not be repeated here. The description of the preset light output can be found in the aforementioned embodiments; they will not be repeated here.

[0205] In this embodiment, for cases where the light source module includes an amber light source, the amber light source can be added to the second sub-special light mode. This second sub-special light mode then possesses three wavelengths of special light, fully utilizing the differences in penetration depth of different wavelengths of light within tissues (short-wave green light is easily absorbed by small blood vessels in superficial tissues, amber light is easily absorbed by blood vessels in deeper tissues, and red light is not easily absorbed by hemoglobin). By optimizing the combination ratio of different wavelengths of light, the contrast between blood vessels and surrounding tissues can be significantly improved, making deep blood vessels more prominent, thereby further enhancing the imaging observation effect of deep blood vessels.

[0206] In some alternative embodiments, the first type of special light mode may also include more or fewer other sub-special light modes, which will not be detailed here.

[0207] In some alternative embodiments, the illumination modes of the light source module include: a white light mode and a second type of special light mode. The second type of special light mode includes several seed special light modes.

[0208] In white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on.

[0209] In the second special light mode, the second green light source is turned on, and the other light sources are partially turned on.

[0210] This application primarily utilizes green light in the 560nm-577nm wavelength band to synthesize special light. Specifically, for white light mode, this application uses a blue light source, a first green light source, a second green light source, and a red light source to synthesize white light. Other light sources can be selectively activated as needed. For example, in some embodiments, all light sources can be activated in white light mode. For non-green light, after processing by optical elements, each color of light source can provide monochromatic light of its corresponding color. For green light, the green light emitted by two green light sources, after filtering (this operation is unnecessary if both are narrowband lights) and combining, can provide green light with a relatively complete wavelength range. Simultaneously, since this application introduces violet light containing an absorption peak in the 415nm wavelength band, better imaging results can be achieved even in white light mode, which is beneficial for the observation and image analysis of physiological tissues. In some embodiments, if an amber light source is also provided within the light source module, the amber light source will also be activated, thereby providing corresponding amber light integrated into the white light, further improving the quality of white light imaging of blood vessels. In some alternative embodiments, the light source module emits white illumination light in the visible light band of 380nm-680nm.

[0211] For the second type of special light, embodiments of this application will activate a second green light source to provide the required second green light. Based on this, other lights of different colors can be combined according to actual needs to achieve different physiological tissue highlighting effects. For example, in some optional embodiments: the second type of special light mode includes a fourth sub-special light mode and a fifth sub-special light mode.

[0212] In the fourth special light mode, both the purple light source and the second green light source are turned on, and the light output of the blue light source, the first green light source, and the red light source is less than the preset light output.

[0213] In the fifth special light mode, the purple light source, the first green light source, and the second green light source are all turned on, and the light output of the blue light source and the red light source is less than the preset light output.

[0214] In the fourth sub-special light mode, the violet light source and the second green light source are illuminated. Violet light has relatively weak penetration into physiological tissues, with shallow penetration depth and less scattering. It is mainly absorbed by hemoglobin in the capillaries of the mucosal surface, making superficial vessels appear dark brown or black, clearly displaying the fine structure of the mucosal surface. Green light in the 560nm-577nm band has relatively strong penetration, reaching the middle and deep layers of the submucosa, displaying thicker vessels and appearing green or gray, creating a layered contrast with the superficial vessels. Simultaneously, both violet light and green light in the 525nm-542nm band contain hemoglobin absorption peaks; therefore, the combined beam of these two lights can achieve clear observation of both superficial and middle-deep vessels, thus achieving good imaging observation of the fine vessels in the mucosal surface and the middle-deep vessels. Meanwhile, the output of the blue light source, the first green light source, and the red light source is weak or even zero (i.e., controlled to be less than the preset output), thereby minimizing the impact of these unnecessary light sources in the current special light mode.

[0215] In the fifth sub-special light mode, the purple light source, the first green light source, and the second green light source are illuminated, while the light output of the blue and red light sources is less than the preset light output, thereby minimizing the impact of unnecessary light sources in this current special light mode. Referring to the description of the third sub-special light mode in the above embodiments, this application embodiment can simultaneously cover the three different absorption peaks of hemoglobin, thus enabling clear observation of the fine structure of the mucosal surface and superficial and mid-deep blood vessels. On the other hand, the introduction of the relatively longer wavelength second green light can effectively improve image brightness, thereby improving the imaging quality of distant scenes and making distant scenes clearer.

[0216] In the above embodiments, the preset light output can be a fixed value or a proportional value relative to other light sources. The specific size of the fixed or proportional value is not limited here. For example, in some embodiments, the preset light output of each light source can be any value lower than its lowest light output value in white light mode. For instance, assuming the lowest light output value of a certain color light source in white light mode is M, when the current special light does not require the use of this color light source, the preset light output of that color light source can be any value less than or equal to M (e.g., 0). In other embodiments, the preset light output can be 1 / n of the current green light source's light output, where n is any value greater than or equal to 5. For example, the preset light output can be 1 / 5 or 1 / 10 of the current green light source's light output, etc.

[0217] In some alternative embodiments, the illumination modes of the light source module include: white light mode, a first type of special light mode, and a second type of special light mode.

[0218] In white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on.

[0219] In the first type of special light mode, the first green light source is turned on, and the remaining light sources are partially turned on.

[0220] In the second type of special light mode, the second green light source is activated, and the remaining light sources are partially activated. The light sources activated in the first and second types of special light modes are not entirely the same.

[0221] This application embodiment is a combination of the two aforementioned embodiments. Specifically, in this embodiment, the light source module has the capability to provide a first type of special light mode including the 525nm-542nm wavelength band and a second type of special light mode including the 560nm-577nm wavelength band. Based on this, in practical applications, medical personnel can select according to actual needs. The advantage of this application embodiment is that it has a richer variety of special light modes, which can meet more clinical needs. Furthermore, through the structures of the above embodiments, it can simultaneously support the effective extraction of two different green light bands. That is, this application embodiment can achieve the acquisition of two different green light absorption peak bands with a simpler structure, thereby providing richer special light functions with a simpler structure, lower switching latency, and easier assembly.

[0222] Regarding the specific sub-special light conditions supported for each type of special light mode, this application does not impose excessive limitations on the embodiments. For example, reference can be made to the descriptions of the embodiments related to the first and second types of special light modes. Furthermore, since the third and fifth sub-special light modes are identical, in some embodiments, when both the first and second types of special light modes are present, it is possible to choose to support both the third and fifth sub-special light modes simultaneously, or retain only one of them. For example, in some embodiments, it is possible to choose to support the first, second, third, and fourth sub-special light modes simultaneously.

[0223] As a specific embodiment of this application, please refer to Figure 8 This is a schematic diagram of the structure of a light source module provided in an embodiment of this application. In this embodiment, the light source module includes:

[0224] A violet light source (V LED) is used to generate violet light;

[0225] Blue LED (B LED) is used to generate blue light;

[0226] The first green light source (G1LED) is used to generate the first green light;

[0227] The second green light source (G2LED) is used to generate the second green light; both green light sources are broadband light sources, and the first green light source is a fluorescent light source excited by blue light;

[0228] Red LED (R LED) is used to generate red light;

[0229] Amber-colored light source (A LED) is used to generate amber light;

[0230] Dichroic mirror 11, dichroic mirror 12, dichroic mirror 13, dichroic mirror 14, and dichroic mirror 15;

[0231] Each light source is equipped with a collimating lens to collimate the light emitted by the light source before it enters the dichroic mirror;

[0232] The coupling lens assembly is used to couple the combined beam of light and transmit it to the endoscope.

[0233] The placement of each component can be referenced. Figure 8 The transmission paths of each light ray and related parameters are described below:

[0234] The red light is first collimated by the collimating lens and then enters the dichroic mirror 15. After being reflected by the dichroic mirror 15, it combines with the amber light and enters the dichroic mirror 14. After being transmitted through the dichroic mirror 14, it combines with the final illumination light. At this time, the final output wavelength of the red light is >610nm.

[0235] Amber light is first collimated by a collimating lens and then enters dichroic mirror 15. After being transmitted through dichroic mirror 15, it combines with red light and enters dichroic mirror 14. After being transmitted through dichroic mirror 14, it combines with the final illumination light. At this time, the final output wavelength of amber light is 600nm-610nm.

[0236] The second green light is first collimated by the collimating lens and then enters the dichroic mirror 13. After being reflected by the dichroic mirror 13, it is combined with the first beam and enters the dichroic mirror 14. After being reflected by the dichroic mirror 14, it is combined with the final illumination light. At this time, the final output wavelength of the second green light is 540nm-600nm.

[0237] The violet light is first collimated by the collimating lens and then enters the dichroic mirror 11. After being transmitted through the dichroic mirror 11, it combines with the blue light and enters the dichroic mirror 12. After being reflected by the dichroic mirror 12, it combines with the first green light and enters the dichroic mirror 13. After being transmitted through the dichroic mirror 13, it combines with the second green light and enters the dichroic mirror 14. After being reflected by the dichroic mirror 14, it merges into the final illumination light. At this time, the final output wavelength of the violet light is <430nm.

[0238] Blue light is first collimated by a collimating lens and then enters dichroic mirror 11. After being reflected by dichroic mirror 11, it combines with violet light and enters dichroic mirror 12. After being reflected by dichroic mirror 12, it combines with the first green light and enters dichroic mirror 13. After being transmitted through dichroic mirror 13, it combines with the second green light and enters dichroic mirror 14. After being reflected by dichroic mirror 14, it merges into the final illumination light. At this point, the final output wavelength of blue light is 430nm-485nm.

[0239] The first green light is first collimated by a collimating lens and then enters a dichroic mirror 12. After being transmitted through the dichroic mirror 12, it combines with the violet and blue light and enters a dichroic mirror 13. After being transmitted through the dichroic mirror 13, it combines with the second green light and enters a dichroic mirror 14. After being reflected by the dichroic mirror 14, it merges into the final illumination light. At this time, the first green light finally outputs a wavelength of 485nm-540nm.

[0240] The corresponding film parameters for each dichroic mirror are as follows:

[0241] Dichroic mirror 15: Reflects 380nm-610nm, transmits 610nm-670nm;

[0242] Dichroic mirror 14: Reflects 380nm-600nm, transmits 600nm-670nm;

[0243] Dichroic mirror 13: Reflects 540nm-670nm, transmits 380nm-540nm;

[0244] Dichroic mirror 12: Reflects 380nm-485nm, transmits 485nm-670nm;

[0245] Dichroic mirror 11: Reflects 430nm-670nm, transmits 380nm-430nm.

[0246] The dichroic mirror 13 has a cutoff wavelength of 540nm, thus effectively removing green light with wavelengths longer than 540nm from the first green light and green light with wavelengths shorter than 540nm from the second green light, thereby separating the two absorption peaks in the green light. The dichroic mirror 12 has a cutoff wavelength of 485nm, which can reflect blue light while filtering out the blue light used for excitation in the first green light.

[0247] Furthermore, the relevant principles, details, and beneficial effects of the embodiments of this application can be found in the above description. Figures 1 to 6 Other related embodiments are not described in detail here.

[0248] In one embodiment, an endoscope light source device is provided, the light source device comprising: the light source module of the above embodiments.

[0249] An endoscope system includes: an endoscope, an image processing device, a display device (display), and a light source device as described in the above embodiments.

[0250] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0251] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A light source module, used in an endoscope light source device, characterized in that, include: A purple light source is used to generate purple light; Blue light source, used to generate blue light; The first green light source is used to generate the first green light; A second green light source is used to generate a second green light; A red light source is used to generate red light; The first light combining component is used to combine the purple light, the blue light and the first green light to obtain a first combined beam; The second beam combining component is used to combine the first beam combining light, the second green light, and the red light to obtain illumination light; The second light-combining component includes: a target light-combining component; The target beam combining component is used to transmit one of the first beam combining light and the second green light and reflect the other, and to combine the first beam combining light and the second green light to obtain a second beam combining light; the green light band covered by the second beam combining light is wider than the band range of the first green light and wider than the band range of the second green light, or the second beam combining light covers all green light bands. Wherein, the first green light and the second green light contain broadband light, and the target light combining component is also used to filter out part of the green light band of the broadband light in the first green light and the second green light when transmitting and / or reflecting light; or, the first green light and the second green light are both narrowband light.

2. The light source module according to claim 1, characterized in that, Both the first green light and the second green light are broadband lights, and the target light combining component is specifically used for: When transmitting or reflecting the first combined light, light with wavelengths longer than a first threshold wavelength is filtered out; when transmitting or reflecting the second green light, light with wavelengths shorter than the first threshold wavelength is filtered out; and the filtered first combined light and the filtered second green light are combined to obtain the second combined light; wherein, the first threshold is any wavelength value in the green light band.

3. The light source module according to claim 1, characterized in that, The first green light is broadband light, and the second green light is narrowband light. The target beam combining component is specifically used to: filter out light with wavelengths longer than a first threshold wavelength when transmitting or reflecting the first beam combining light, transmit or reflect the second green light, and combine the filtered first beam combining light and the second green light to obtain the second beam combining light. The first threshold is any wavelength value in the green light band; or The first green light is narrowband light, and the second green light is broadband light. The target light combining component is specifically used to: transmit or reflect the first combined light, filter out light with wavelengths shorter than the first threshold wavelength when transmitting or reflecting the second green light, and combine the first combined light and the filtered second green light to obtain the second combined light. The first threshold is any wavelength value in the green light band.

4. The light source module according to claim 1, characterized in that, Both the first green light and the second green light are narrowband lights. The first combined light and the second green light have some overlapping green light bands. In the green light band of the second combined light, the light intensity in the full width at half maximum (FWHM) band is greater than the light intensity corresponding to the FWHM.

5. The light source module according to claim 1, 2, or 3, characterized in that, The first green light source is a fluorescent excitation source, and the first green light is broadband light obtained based on blue light or violet light excitation. The first light combining component includes: A target dichroic mirror is used to filter out light with wavelengths shorter than the green light wavelength in the first green light, and to combine the blue light and the filtered first green light.

6. The light source module according to claim 2, characterized in that, When both the first green light and the second green light are broadband lights, the method further includes: The first green light source and the second green light source are the same or different green light sources, and the first green light contains all green light bands with wavelengths shorter than the first threshold, and the second green light contains all green light bands with wavelengths longer than the first threshold.

7. The light source module according to claim 1, characterized in that, Also includes: Amber-colored light source, used to generate amber light; The second light combining component is specifically used to combine the first combined light, the second green light, the red light, and the amber light to obtain the illumination light.

8. The light source module according to any one of claims 1 to 4 and 6 to 7, characterized in that, The illumination modes of the light source module include: white light mode and a first type of special light mode; the first type of special light mode includes several seed special light modes; In the white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on; In the first type of special light mode, the first green light source is turned on, and the other light sources are partially turned on.

9. The light source module according to claim 8, characterized in that, The first type of special light mode includes at least one of a first sub-special light mode, a second sub-special light mode, and a third sub-special light mode; In the first sub-special light mode, both the purple light source and the first green light source are turned on, and the light output of the blue light source, the second green light source, and the red light source is less than the preset light output. In the second sub-special light mode, both the first green light source and the red light source are turned on, and the light output of the purple light source, the blue light source and the second green light source is less than the preset light output. In the third sub-special light mode, the purple light source, the first green light source, and the second green light source are all turned on, and the light output of the blue light source and the red light source is less than the preset light output.

10. The light source module according to claim 9, characterized in that, The light source module also includes: an amber light source, used to generate amber light; In the second sub-special light mode, the first green light source, the red light source, and the amber light source are all turned on, and the light output of the purple light source, the blue light source, and the second green light source is all less than the preset light output.

11. The light source module according to any one of claims 1 to 4 and 6 to 7, characterized in that, The illumination modes of the light source module include: white light mode and a second type of special light mode; the second type of special light mode includes several seed special light modes; In the white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on; In the second type of special light mode, the second green light source is turned on, and the other light sources are partially turned on.

12. The light source module according to claim 11, characterized in that, The second category of special light modes includes a fourth sub-special light mode and a fifth sub-special light mode; In the fourth sub-special light mode, both the purple light source and the second green light source are turned on, and the light output of the blue light source, the first green light source, and the red light source is less than the preset light output. In the fifth special light mode, the purple light source, the first green light source, and the second green light source are all turned on, and the light output of the blue light source and the red light source is less than the preset light output.

13. The light source module according to any one of claims 1 to 4 and 6 to 7, characterized in that, The illumination modes of the light source module include: white light mode, first type of special light mode, and second type of special light mode; In the white light mode, the blue light source, the first green light source, the second green light source, and the red light source are all turned on; In the first type of special light mode, the first green light source is turned on, and the other light sources are partially turned on; In the second type of special light mode, the second green light source is turned on, and the other light sources are partially turned on; the light sources turned on in the first type of special light mode and the second type of special light mode are not exactly the same.

14. The light source module according to any one of claims 1 to 4 and 6 to 7, characterized in that, The target light-combining component is a single dichroic optical element.

15. The light source module according to claim 2 or 3, characterized in that, The first threshold is any value between 540nm and 560nm.

16. A light source device, characterized in that, The light source device includes: a light source module as described in any one of claims 1 to 15.

17. An endoscope system, characterized in that, include: Endoscope, display device, and light source device as described in claim 16.

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