Light source module, light source device, and endoscope system

Abstract

The invention relates to a light source module, a light source apparatus, 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; the first light combining part is used for combining the purple light, the blue light and the first green light to obtain first combined light; the second light combining part is used for combining the first combined beam light, the second green light and the red light to obtain illumination light; the second light combining part is used for combining the first combined light and the second green light to obtain second combined light; when the broadband light exists in the first green light and the second green light, the target light combination part filters out part of green light wave bands of the broadband light; the second combined light includes all green light bands, or includes a wider green light component than the first green light and the second green light. The embodiment of the invention can provide the light source module and the light source equipment which are simpler in structure, lower in switching time delay and lower in assembly difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopes, in particular to a light source module, a light source device and an endoscope system. BACKGROUND

[0002] In the medical field, endoscopes have become a popular diagnostic method. Medical endoscopes have an insertion part inserted into the human body, illumination light generated by a light source device is transmitted into the human body by a light guide beam for illumination, an image is captured by a camera module at the front end of the insertion part, and image processing is performed by a corresponding image processor, and finally image output is performed through a display.

[0003] As a light source device for providing illumination light when observing a living body, solid-state light emitting elements such as LEDs (Light Emitting Diodes) or LDs (Laser Diodes) are gradually applied to actual products instead of traditional xenon lamps and halogen lamps due to their low power consumption and long service life. In the diagnosis of endoscopes, white light mode is commonly used to observe the overall shape of the surface of living tissues, and in addition, various special light modes have been developed to enhance the observation of blood vessels at different depths, thereby enhancing the screening of diseased tissues, and thus requiring the light source device to provide illumination modes with different spectral forms, for example: using an LED light source as a light emitting element, and combining multiple LED light sources to achieve the above-mentioned 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 used to combine light, and sometimes the wavelength bands required for light sources of the same color in different special light modes also differ. Based on this, the prior art often uses a filter switching motor to switch between different wavelength bands, for example, in white light observation mode, the filter switching motor moves the filter out of the light path, in special light mode 1, the filter switching motor moves filter 1 corresponding to the light path, and in special light mode N, the filter switching motor moves filter N corresponding to the light path. Although this can achieve switching between different wavelength bands of the same color light source, it has many defects such as complex motor structure, delay in light switching, large size, high cost, high assembly difficulty and high failure rate.

[0005] Based on the above situation, it is necessary to provide a light source device with a simpler structure, lower switching delay and lower assembly difficulty to meet actual needs. SUMMARY

[0006] Based on this, it is necessary to provide a light source module, a light source device and an endoscope system with a simpler structure, lower switching delay and lower assembly difficulty to meet actual needs.

[0007] The application provides a light source module applied to a light source device of an endoscope, and the light source module comprises:

[0008] A purple light source is configured to generate purple light.

[0009] A blue light source is configured to generate blue light.

[0010] A first green light source is configured to generate first green light.

[0011] A second green light source is configured to generate second green light.

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

[0013] A first light combining component is configured to combine the purple light, the blue light and the first green light to obtain first combined light.

[0014] A second light combining component is configured to combine the first combined light, the second green light and the red light to obtain illumination light.

[0015] The second light combining component comprises a target light combining component.

[0016] The target light combining component is configured to transmit one of the first combined light and the second green light and reflect the other one, and combine the first combined light and the second green light to obtain second combined light; the second combined light covers a green light waveband range wider than that of the first green light and wider than that of the second green light, or the second combined light covers all green light wavebands.

[0017] In the first green light and the second green light, there is broadband light, and the target light combining component is further configured to filter out part of the green light waveband 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] The application can achieve the required white light mode and special light mode illumination by selectively turning on the required green light source, without the need for filter switching motor related structure, thus greatly simplifying the related structure required for special light, greatly reducing the assembly difficulty. Due to the effective simplification of the structure, the optical machine module of the application has lower failure rate and better stability, and can effectively reduce the material cost. At the same time, since the switching motor is not needed, but the opening and closing of different light sources are controlled to realize the switching of the illumination mode, different monochromatic light sources can be obtained for different special light observation modes, so there is no time delay caused by physical switching of the motor, that is, lower switching time delay can be achieved. In addition, the application embodiment can also be compatible with different green light sources, so the selection of green light source components in actual application is more flexible, that is, the cost of special light required green light source can be reduced, thereby further reducing the material cost and assembly difficulty.

[0019] In summary, the application embodiment can provide a light source module and light source device with simpler structure, lower switching time delay and lower assembly difficulty.

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

[0021] In one embodiment, when the first green light and the second green light are both broadband light, the target light combining component is specifically configured to:

[0022] In one embodiment, when the first green light is broadband light and the second green light is narrowband light, the target light combining component is specifically configured to: filter out light with a wavelength longer than a 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, the first threshold being 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 configured to: transmit or reflect the first combined light, filter out light with a wavelength shorter than a 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 being any wavelength value in the green light band.

[0024] In one of the embodiments, when the first green light and the second green light are both narrow-band light, the first combined light and the second green light have partial green light band overlap, and in the green light band in the second combined light, the light intensity in the full width at half maximum band range is greater than the corresponding light intensity at the half width.

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

[0026] The target dichroic mirror is configured to filter out light with a wavelength shorter than that of green light in the first green light and combine the blue light and the filtered first green light.

[0027] In one of the embodiments, when the first green light and the second green light are both broadband light, the light source module 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 includes all green light bands with a wavelength shorter than a first threshold, and the second green light includes all green light bands with a wavelength longer than the first threshold.

[0029] In one of the embodiments, the amber light source is configured to generate amber light.

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

[0031] In one of the embodiments, the illumination modes of the light source module include a white light mode and a first special light mode. The first special light mode includes a plurality of sub-special light modes.

[0032] 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.

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

[0034] In one of the embodiments, the first 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 sub-special light mode, the violet light source and the first green light source are both turned on, and the blue light source, the second green light source, and the red light source have light output amounts less than a preset light output amount.

[0036] In the second sub-special light mode, the first green light source and the red light source are both turned on, and the violet light source, the blue light source, and the second green light source have light output amounts less than a preset light output amount.

[0037] In the third sub-special light mode, the violet 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 of the embodiments, the light source module further comprises an amber light source for generating amber light.

[0039] 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 violet light source, the blue light source and the second green light source is less than the preset light output.

[0040] In one of the embodiments, the illumination modes of the light source module comprise a white light mode and a second type of special light mode. The second type of special light mode comprises several sub-special light modes.

[0041] 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.

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

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

[0044] In the fourth sub-special light mode, the violet light source and the second green light source are both 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 sub-special light mode, the violet 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 of the embodiments, the illumination modes of the light source module comprise a white light mode, a first type of special light mode and a second type of special light mode.

[0047] 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.

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

[0049] In the second type of special light mode, the second green light source is turned on and the rest of the 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 completely the same.

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

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

[0052] The application provides a light source module applied to a light source device of an endoscope, and the light source module comprises:

[0053] A purple light source is configured to generate purple light.

[0054] A blue light source is configured to generate blue light.

[0055] A first green light source is configured to generate first green light.

[0056] A second green light source is configured to generate second green light.

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

[0058] A first light combining component is configured to combine the purple light, the blue light and the first green light to obtain first combined light.

[0059] A second light combining component is configured to combine the first combined light, the second green light and the red light to obtain illumination light.

[0060] The second light combining component comprises a target light combining component.

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

[0062] In the first green light and the second green light, there is broadband light, and the target light combining component is further configured to filter out a part of green light wave bands of the broadband light in the first green light and the second green light when transmitting and / or reflecting light rays; or the first green light and the second green light are both narrowband light.

[0063] The embodiment of the present application can realize the required white light mode and special light mode illumination by selectively turning on the required green light source, without the related structure of the filter switching motor, so that the related structure required by the special light can be greatly simplified, and the assembly difficulty is greatly reduced. Since the structure is effectively simplified, the optical machine module of the embodiment of the present application has lower failure rate and better stability, and can effectively reduce the material cost. At the same time, since the switching motor is not required to cooperate, but the opening and closing of different light sources are controlled to realize the switching of the illumination mode, different monochromatic light sources can be obtained for different special light observation modes, so there is no time delay caused by the physical switching of the motor, that is, lower switching time delay can be realized. In addition, the embodiment of the present application can also be compatible with different green light sources, so the selection of green light source components in actual application is more flexible, that is, the cost of the green light source required by the special light can be reduced, thereby further reducing the material cost and assembly difficulty.

[0064] In summary, the embodiment of the present application can provide a light source module and a light source device with simpler structure, lower switching time delay and lower assembly difficulty.

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

[0066] An endoscope system comprising: an endoscope, a display device, and the light source device in the above embodiment.

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

[0068] The beneficial effects of the above light source device and endoscope system can refer to the related description of the above light source module embodiment. BRIEF DESCRIPTION OF DRAWINGS

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

[0070] Figure 2 A structural schematic diagram of the light source module provided in an embodiment;

[0071] Figure 3 Another structural schematic diagram of the light source module provided in an embodiment;

[0072] Figure 4 Another structural schematic diagram of the light source module provided in an embodiment;

[0073] Figure 5 Another structural schematic diagram of the light source module provided in an embodiment;

[0074] Figure 6 Another structural schematic diagram of the light source module provided in an embodiment;

[0075] Figure 7 A schematic diagram of a scenario in which two green lights provided in an embodiment are narrow-band lights;

[0076] Figure 8 Another schematic diagram of a light source module provided in an embodiment.

[0077] The reference signs in the drawings are as follows:

[0078] 101, light source device; 102, endoscope; 103, image processing device; 104, display; 11, dichroic mirror; 12, dichroic mirror; 13, dichroic mirror; 14, dichroic mirror; 15, dichroic mirror. DETAILED DESCRIPTION

[0079] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

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

[0081] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0082] In addition, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0083] Reference should be made to Figure 1 , Figure 1is a schematic diagram of an endoscope system provided by an embodiment of the present application. The endoscope system can include a light source device 101, an endoscope 102 (or referred to as a scope), an image processing device 103, and a display 104 (also referred to as a display device). The devices are described in turn as follows:

[0084] For the light source device 101:

[0085] The light source device 101 contains a light engine module (i.e., a light source module, a core component of the light source device 101, for providing 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 in the embodiments) and optical elements. The light source devices are used to generate light beams of specific wavelengths, and the number of light source devices can be 5 or more. The types of light source devices can be LED light sources or LD laser light sources, etc., which are not limited here. 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, etc. The optical elements can be used to collimate, filter, and combine the light beams emitted by the light source devices, etc., to achieve the combined output of the required specific wavelength light beams.

[0086] After the light source device 101 and the endoscope 102 are successfully connected through their respective connection parts, the light source device 101 can be used to incident the combined light (light rays) after the light beam combination to the end face of the light guide of the endoscope 102, so that the light beams are emitted from the head end of the endoscope 102, providing illumination light for the endoscope 102. For example, when using the endoscope 102 to perform a digestive tract examination, the light source device 101 shoots light rays into the endoscope 102, which are transmitted through the light guide in the endoscope 102, and then illuminated by the head end illumination window of the endoscope 102 to the observed digestive tract part, achieving effective illumination of the digestive tract part.

[0087] In some optional embodiments of the present application, the light source device 101 has multiple illumination modes and / or multiple brightness levels to meet different clinical use requirements. Among them, in different illumination modes, the waveband content covered in the light emitted by the light source device 101 is not completely the same, that is, the color of the light emitted by the light source device 101 in different illumination modes is not completely the same. 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 emits special light (other color monochromatic light or composite light other than white light). Different brightness levels correspond to the difference in light output brightness of the light source device 101, which can be achieved by adjusting the light output power of the light source device, or can be achieved by other means, such as adjusting the degree of physical shielding of the emitted light to achieve the final light output brightness change, and the specific manner is not limited here. The number of illumination modes and the number of brightness levels supported by the light source device 101 are not limited in the embodiments of the present application, and can be determined according to actual conditions. For example, the light source device 101 can support 3, 4, 5, 6, 7 or more illumination modes. The number of brightness levels of 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 accurate automatic exposure function, several hundred to thousands of brightness levels can be set for automatic adjustment, and on this basis, part of the brightness levels can be provided for the user to manually select, thereby meeting the differentiated brightness level adjustment requirements.

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

[0089] For the 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] The display 104 can be a liquid crystal display (LCD), a light-emitting diode (LED) display, a VR headset, or other display device with display capability. The display 104 can display the image processing result provided by the image processing device 103. In some examples, the display 104 can display the image captured by the imaging module of the endoscope 102 in real time, and the recognition result of the image processing device 103 on the image (e.g., lesion recognition). In other examples, the display 104 can also display the three-dimensional model obtained by the image processing device 103 based on the image.

[0097] The following describes the workflow of the endoscope system in common clinical scenarios:

[0098] During the examination of a patient, the medical staff (i.e., the user) can first connect and start the devices of the endoscope system, and then insert the insertion portion into the patient's body. At this time, the light source device 101 emits light into the endoscope 102, which is emitted from the illumination window of the head end portion of the endoscope 102 to the physiological site containing the object to be measured in the patient's body. After the physiological site is illuminated by the light, the reflected light is reflected to the imaging module of the head end portion, and the imaging module generates an image of the physiological site based on the received reflected light and transmits the image to the light source device 101 via the 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 highlighting specific physiological structures such as blood vessels is needed, a special light mode can be turned on, and different light sources can be controlled by the light source device 101 to turn on or off, thereby achieving the synthesis of special light.

[0099] It should also be noted that, Figure 1The endoscope system is not limited to the embodiments shown in the figures, and in actual applications, the endoscope system can include more or fewer components than shown, or some components can be combined, or different components can be included. For example, the endoscope system can also include a trolley, an accessory device (such as a carbon dioxide gas pump), an AI processing device (such as an AI host or a remote server) dedicated to executing an AI algorithm, and the like, which can be determined according to actual application, and the present application is not limited thereto. In addition, the connection relationship between the various devices can also have certain differences. For example, in some optional embodiments, the endoscope 102 can be in communication connection with the image processing device 103. For another example, in some other optional embodiments, when the endoscope system includes an AI processing device, the AI processing device can be arranged between the image processing device 103 and the display 104, so as to realize secondary processing and display of the image output by the image processing device 103. Correspondingly, according to the different connection relationships, the data transmission path of the endoscope 102 will also have adaptive differences, which will not be described here.

[0100] The special light mode of the endoscope is a very important illumination mode in clinical practice, which can greatly improve the imaging effect of physiological tissues, for example, improve the imaging of blood vessels, polyps and specific tissues, so that medical personnel can more easily observe the morphology of specific tissues, thereby helping medical personnel to make more accurate and rapid judgments.

[0101] In common special light modes such as NBI, RDI and BLI, a plurality of light sources of different colors are used to combine light, and sometimes the wavelength bands required for light sources of the same color in different special light modes also have certain differences. Based on this, the prior art often uses a switching filter to switch different wavelength bands, for example, in a white light observation mode, the filter switching motor moves the filter out of the light path, in a special light mode 1, the filter switching motor moves a corresponding filter 1 into the light path, and in a special light mode N, the filter switching motor moves a filter N corresponding to different parameters into the light path. Although this can achieve switching of different wavelength bands of the same color light source, at least the following defects exist:

[0102] 1. The light source structure is increased in size and complexity.

[0103] 2. There are many motor parts, high risk of failure, and poor drop resistance.

[0104] 3. There can be filter angle deviation after long-term use.

[0105] 4. There is a delay in switching the filter.

[0106] 5. The material cost and assembly difficulty are high.

[0107] Based on the above, the prior art needs a light source device with simpler structure, lower switching delay and lower assembly difficulty to meet the actual needs.

[0108] In practical applications, hemoglobin has multiple absorption peaks in different wavebands, mainly including: a waveband around 415 nm, a waveband of 525 nm-542 nm, and a waveband of 560 nm-577 nm. The waveband around 415 nm is in the violet (ultraviolet) waveband range, and the wavebands of 525 nm-542 nm and 560 nm-577 nm are mainly in the green waveband range. Therefore, in practical applications, the control of the related components of the green waveband can be used to realize the control of the white light mode and the special light mode that can enhance hemoglobin imaging.

[0109] Based on this, in the embodiments of the present application, a violet light source, a blue light source and a red light source are arranged in the light source module, and two independent light sources (i.e., a first green light source and a second green light source) are arranged for the green light. The two green light sources can be independently controlled to be turned on or off, and the power when turned on can be independently controlled, so as to realize flexible control of the two green lights. On this basis, the green light emitted by the two green light sources can be full-band light, full-narrow-band light, or one wide-band light plus one narrow-band light. When there is a wide-band light, the wide-band light can be filtered by the light combining component when reflecting or transmitting the wide-band light, so as to obtain the required narrow-band light. Among them, all or part of the green light emitted by at least one green light source contains the above-mentioned waveband of 525 nm-542 nm or 560 nm-577 nm. At the same time, in the scenario where both the first green light source and the second green light source are turned on, the green light waveband range covered by the combined light (i.e., the second combined light) obtained by combining the two green lights is wider than the waveband range of the first green light and the second green light, or the second combined light contains all the green light wavebands.

[0110] Therefore, the embodiments of the present application can turn on all the light sources of the light source module when the white light mode is needed, provide the necessary blue light, the necessary red light, the violet light that can be used to enhance hemoglobin, and the full-band (or most of the bands) green light. Thus, the integrity of the necessary visible light band components in the white light and the ultraviolet light component that can enhance hemoglobin are ensured, so that high-quality white light can be realized. When a specific special light mode is needed, only the green light source with the required waveband can be turned on, and the other green light source can be turned off or controlled to operate at low power. In addition, some other non-green light sources can be selectively turned on according to actual needs, so as to obtain the required special light. On this basis, the narrow-band light / wide-band light green light source can be flexibly selected and matched, and the required green narrow-band light can be obtained by filtering when there is a wide-band light. Therefore, the requirements for the green light source component can be greatly reduced, and the special light can be obtained at low cost.

[0111] From the above analysis, the embodiment of the present application can achieve the required white light mode and special light mode illumination by selectively turning on the required green light source, without the need for filter switching motor related structure, so as to greatly simplify the related structure required by the special light, and greatly reduce the assembly difficulty. Due to the effective simplification of the structure, the optical machine module of the embodiment of the present application has lower failure rate and better stability, and can effectively reduce the material cost.

[0112] At the same time, since the switching motor is not needed, but the opening and closing of different light sources are controlled to realize the switching of the illumination mode, different monochromatic light sources can be obtained for different special light observation modes, so there is no time delay caused by physical switching of the motor, that is, lower switching time delay can be realized.

[0113] In addition, the embodiment of the present application can also be compatible with different green light sources, so the selection of green light source components in actual application is more flexible, that is, the cost of special light required green light source can be reduced, thereby further reducing the material cost and assembly difficulty.

[0114] In summary, the embodiment of the present application can provide a light source module and a light source device with simpler structure, lower switching time delay and lower assembly difficulty.

[0115] The light source type in the embodiment of the present application can be LED light source or LD laser light source, etc. For convenience of description, the following will be exemplarily described taking LED light source as an example. In the embodiment of the present application, the light source module comprises:

[0116] The purple light source is used for generating purple light.

[0117] The blue light source is used for generating blue light.

[0118] The first green light source is used for generating first green light.

[0119] The second green light source is used for generating second green light.

[0120] The red light source is used for generating red light.

[0121] The first light combining component is used for combining the purple light, the blue light and the first green light to obtain first combined light.

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

[0123] The second light combining component comprises a target light combining component.

[0124] The target light combining component is configured to transmit one of the first combined light and the second green light and reflect the other one, and combine the first combined light and the second green light to obtain second combined light; the second combined light covers a green light wavelength range wider than the first green light wavelength range and wider than the second green light wavelength range, or the second combined light covers all green light wavelengths.

[0125] In the first green light and the second green light, there is broadband light, and the target light combining component is further configured to filter out part of the green light wavelength range of the broadband light in the first green light and the second green light when transmitting and / or reflecting the light; or the first green light and the second green light are both narrow-band light.

[0126] In the embodiments of the present application, at least a purple light source, a blue light source, a first green light source, a second green light source and a red light source are arranged in the light source module, that is, five light sources of four colors.

[0127] The purple light source (V LED, also referred to as ultraviolet light source) is configured to provide light rays in the purple light wavelength range, and the embodiments of the present application do not make too many limitations on the actual purple light wavelength range that can be emitted by the purple light source, provided that the purple light source emits light rays containing 415 nm wavelength purple light. For example, in order to better image, in some embodiments, the purple light emitted by the purple light source and the light rays emitted through the second light combining component (under the condition that the purple light source is turned on) contain at least 415 nm wavelength light. In some embodiments, the purple light source can emit purple light containing the 380 nm-450 nm, 395-430 nm or 400 nm-420 nm wavelength range. In some embodiments, after being processed by each optical element, the final illumination light contains purple light with a wavelength less than 430 nm and containing 415 nm.

[0128] The blue light source (B LED) is configured to provide light rays in the blue light wavelength range, and the emitted blue light can cover the entire or most of the blue light wavelength range, and the embodiments of the present application do not make too many limitations on the actual blue light wavelength range that can be emitted by the blue light source, which can be selected according to actual conditions. For example, in some embodiments, the blue light source can emit blue light containing the 430 nm-480 nm, 430 nm-495 nm, 435 nm-480 nm or 435 nm-495 nm wavelength range. In some embodiments, after being processed by each optical element, the final illumination light contains blue light with a wavelength containing 430 nm-480 nm.

[0129] The red light source (R LED) is configured to provide light in the red light band, and the emitted red light covers the entire or most of the visible red light band. The embodiments of the present application do not make excessive limitation on the red light band that can be actually emitted by the red light source, and the red light can be selected according to the actual situation. In some embodiments, the red light source can emit all the red light bands above 610 nm. In some embodiments, the light finally emitted after being processed by the optical elements includes all the visible red light bands above 610 nm.

[0130] The first green light source (G1 LED) is configured to provide green light with 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 the optical elements under the condition that the first green light source is turned on, both cover at least part or all of the green light in the 525 nm-542 nm band. The embodiments of the present application do not make excessive limitation on the green light band that can be actually emitted by the first green light source. 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 in the 480 nm-540 nm, 480 nm-610 nm, 495 nm-540 nm, 495 nm-610 nm, or 495 nm-570 nm band. In some embodiments, the light finally emitted after the first green light is processed by the optical elements includes all the green light in the 525 nm-542 nm band, for example, the first green light remains the green light in the 480 nm-540 nm band after being processed by the optical elements.

[0131] The second green light source (G2 LED) is configured to provide green light with relatively long wavelength in the green light band. Specifically, the second green light directly emitted by the second green light source, and the light finally emitted after the second green light is processed by the optical elements under the condition that the second green light source is turned on, both cover at least part or all of the green light in the 560 nm-577 nm band. The embodiments of the present application do not make excessive limitation on the green light band that can be actually emitted by the second green light source. 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 in the 540 nm-600 nm, 480 nm-610 nm, 540 nm-570 nm, 480 nm-570 nm, or 495 nm-570 nm band. In some embodiments, the light finally emitted after the second green light is processed by the optical elements includes all the green light in the 560 nm-577 nm band, for example, the second green light remains the green light in the 540 nm-600 nm band after being processed by the optical elements.

[0132] It can be understood that the light mixing of different light rays is to mix different light rays to obtain a composite light (combined light) containing all light rays before mixing. Based on this, unless otherwise specified, the transmission, reflection and light mixing of the composite light are also the corresponding processing of different waveband light rays in the composite light. For example, the first combined light contains the first green light, and therefore, when the first combined light is transmitted / reflected / light mixed, the first green light in the first combined light is also transmitted / reflected / light mixed. For example, when the first combined light after transmission and the second green light after reflection are light mixed, the first green light in the first combined light and the second green light are also light mixed.

[0133] In the embodiments of the present application, the light mixing component has the function of light mixing of multiple light beams, and on this basis, the number of optical elements contained in the light mixing component and the type of the optical elements are not limited too much. That is, the light mixing component can be a single optical element or a general term of multiple optical elements, which can be determined according to the actual needs of each light mixing component. Specifically:

[0134] For the first light mixing component, one of its main functions is to mix the purple light, the blue light and the first green light, and based on this, the specific light mixing element can be flexibly selected and set. For example, in some embodiments, only one light mixing element can be set, such as a single dichroic optical element (such as a dichroic mirror and a dichroic prism) or a triple prism, etc. The purple light and the blue light enter the light mixing element from the same direction, and the first green light enters the light mixing element from another direction. The light mixing element reflects or transmits the incident light to obtain the combined light (i.e. the first light mixing component).

[0135] For example, in another optional embodiment, the first light mixing component can include a dichroic mirror 11 and a dichroic mirror 12. Figures 2 to 6 is a structural schematic diagram of several light source modules provided by some embodiments of the present application. In these schematic structures, the first light mixing component includes a dichroic mirror 11 and a dichroic mirror 12. For the Figures 2 to 4 In the embodiment shown in the figure, the dichroic mirror 11 is used to mix the purple light and the blue light, and the dichroic mirror 12 is used to mix the mixed purple light and blue light with the first green light to obtain the required first combined light. In some optional embodiments, the dichroic mirror 11 and the dichroic mirror 12 can be replaced by other light mixing elements. Figures 2 to 4 In the embodiment shown in the figure, the film layer parameters of the dichroic mirror 11 are: reflecting 430nm-670nm, transmitting 380nm-430nm, and the film layer parameters of the dichroic mirror 12 are: 380nm-485nm, transmitting 485nm-670nm. In some optional embodiments, the film layer parameters of the dichroic mirror 11 and the dichroic mirror 12 can be replaced by other film layer parameters. Figure 5 and Figure 6In the shown embodiment, the dichroic mirror 12 is used to combine the first green light and the blue light, and the dichroic mirror 11 is used to combine the first green light and the blue light after combination with the violet light, so as to obtain the required first combined light.

[0136] In the embodiments of the present application, the target light combination component can be configured to transmit the first combined light and reflect the second green light, or can be configured to reflect the first combined light and transmit the second green light, which can be determined according to actual light path design, and is not limited herein. The following is an example of the target light combination component transmitting the first combined light and reflecting the second green light.

[0137] For one of the main functions of the target light combination component, the target light combination component transmits one of the first combined light and the second green light, reflects the other one, and combines the first combined light and the second green light to obtain the second combined light containing complete green light bands. For another one of the main functions, when there is broadband light in the first green light and the second green light, the target light combination component can filter the broadband light in the first green light and the second green light when transmitting and / or reflecting the light, and the filtered part is a part of the green light bands in the broadband light, so that the broadband light becomes green light that can be combined with another green light to cover most or all of the green light bands. It can be understood that when the first green light and the second green light are both narrow-band light, the target light combination component can or can not have the function of filtering a part of the green light bands.

[0138] It can be understood that, in order to guarantee the quality of the white light synthesized in the white light mode, the target light combination component in the embodiments of the present application needs to meet the requirement that the filtered bands can cover most or all of the green light bands after being combined with another green light, so as to ensure the relative integrity of the green light bands in the white light combination, and guarantee the quality of the white light.

[0139] Specifically, in the embodiments of the present application, the green light bands covered by the second combined light are wider than the green light bands of the first green light and the second green light, or the second combined light covers all green light bands. That is, in one possible case, the second combined light synthesized after filtering the green light bands can still completely cover the first green light and the second green light, and has a wider band range than the first green light and the second green light. Therefore, when the white light is combined, a relatively more complete green light band can be provided, and most of the green light bands can be covered. In another possible case, the second combined light can cover all green light bands, that is, the first green light and the second green light can cover all green light bands after filtering and combining.

[0140] Or in other optional embodiments, it can also be set that the proportion of the green light band covered by the second combined light is greater than or equal to the preset proportion threshold, to ensure that the white light combined contains at least most of the green light band, so that the quality of white light is guaranteed. In some embodiments, the preset proportion threshold can be any value in 60% to 100%, or it can also be any value in 75% to 100%. For example, when the preset proportion threshold is 75%, the second combined light at least covers the main 75% of the green light band, at this time it means that the final white light contains at least 75% of the green light band, so the white light still has better quality. For another example, when the preset proportion threshold is 100%, it means that the second combined light needs to cover all the green light band.

[0141] In addition, it can be understood that in actual application, not only the relative integrity of the two green light bands after combination needs to be guaranteed, but also the uniformity of the overall green light band intensity after the combination of the green light in white light mode (that is, the light intensity difference in the green light band cannot be too large) needs to be guaranteed, so as to prevent the case that the green light is not uniform in white light mode, resulting in color deviation (for example, greenish) of the illumination light. Based on this, it can be known that in the case that there is broadband light in the first green light and the second green light, the broadband light needs to be filtered to avoid the case that the green light band light intensity uniformity is poor due to the direct superposition of part of the green light band on the broadband light.

[0142] In addition, as an optional embodiment of the present application, for the case that there is broadband light, the wave band overlap rate between the two green lights (for the broadband light, it refers to the green light after filtering, which retains part of the wave band) during the combination is small, specifically: less than the preset overlap rate threshold. The specific value of the overlap rate threshold can be set according to the actual situation, for example, in some optional embodiments, the overlap rate threshold can be 0 (at this time, the two green lights before combination have no overlap), 5%, 10% or 15%, etc. The advantages here are: 1. The two green light bands are relatively independent and have no overlap, and both contain part or all of the 525nm-542nm band and the 560nm-577nm band, so they can both be used as the basis green light of the special light mode, that is, the embodiments of the present application can freely and flexibly use the two green lights to realize different special light modes. 2. The intensity of the part of the two green lights retained for combination can be relatively independently controlled, and the mutual interference is small, that is, the area of the light intensity affected by the mutual influence of the overlapping part after combination is small. Therefore, the overall light intensity uniformity and controllability of the green light band after combination are also higher, and better light intensity uniformity in the green light band can be achieved.

[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 shown embodiment, the second light combining component comprises a dichroic mirror 13 and a dichroic mirror 14. In this case, on the one hand, the first combined light and the second green light are combined by the dichroic mirror 13 to obtain the second combined light, and on the other hand, the second combined light is combined with the red light by the dichroic mirror 14. In some alternative embodiments, Figures 2 to 4 The film layer parameters of the dichroic mirror 14 in the shown embodiment are: reflecting 380nm-600nm, and transmitting 600nm-670nm. In some alternative embodiments, Figure 3 The film layer parameters of the dichroic mirror 15 in the shown embodiment are: reflecting 380nm-610nm, and transmitting 610nm-670nm. In some alternative embodiments, Figure 4 The film layer parameters of the dichroic mirror 15 in the shown embodiment are: reflecting 610nm-670nm, and transmitting 380nm-610nm.

[0148] In some alternative embodiments, the second green light and the red light can be combined first, and then the obtained combined light is combined with the first combined light to obtain the second combined light, that is, the second combined light at this time already contains the red light. For example, reference can be made to Figures 5 to 6 In the shown embodiment, the second light combining component comprises a dichroic mirror 13 and a dichroic mirror 14, and the second green light and the red light are combined by the dichroic mirror 13 first, and then the obtained combined light is combined with the first combined light by the dichroic mirror 14 to obtain the second combined light.

[0149] From the above analysis, it can be known that when the red light is combined with the first combined light and the second green light first, the second combined light already contains the red light, and when the first combined light and the second green light are combined first, the second combined light and the combined light are combined again in the embodiment of the present application to obtain the required illumination light.

[0150] It should be understood that the above description of each light combining component is an example of all light source modes being turned on, and in actual applications, the type and number of light sources turned on each time will be different according to the different lighting modes used. However, it can be understood that the turning on of different light sources does not affect the original function of each optical element, but only affects the light and processing involved in the actual function. For example, for the first light combining component, assuming that the purple light source is not turned on and the other light sources are normally turned on. At this time, the function of the first light combining component is still to combine the purple light, the blue light and the first green light, but since the purple light source is not turned on, at this time the blue light and the first green light are actually combined, and the resulting combined light does not contain the purple light emitted by the purple light source. On the other hand, for the light, with the difference in the light source turned on, the composition of the light in the light source module will change. For example, when the purple light source is turned off, the subsequent combined light does not contain the purple light emitted by the purple light source, and when one or both of the first green light source and the second green light source are turned off, the corresponding subsequent combined light will also lack the green light emitted by the turned-off green light source. For example, assuming that the first green light source is turned off and the second green light source is turned on, at this time the subsequent combined light does not contain the green light component emitted by the first green light source.

[0151] Based on the above structure, the light source module of the embodiment of the present application is provided with a purple light source, a blue light source and a red light source, and two independent light sources (i.e. a first green light source and a second green light source) are provided for green light, which can be independently controlled to be turned on or turned off, and the power when turned on can be independently controlled, thereby realizing flexible control of the two green lights. On this basis, the two green light sources can be full-band light, full-narrow-band light or one wide-band light plus one narrow-band light. When there is a wide-band light, the wide-band light can be filtered by the light combining component when reflecting or transmitting the wide-band light, thereby obtaining the required narrow-band light segment.

[0152] Thus, the embodiment of the present application can turn on the blue light source, the first green light source, the second green light source and the red light source when the white light mode is needed, to provide the necessary blue light, the necessary red light and the necessary green light (including most or all of the green light band), or all the light sources of the light source module can be selected to be turned on when the white light mode is needed, to provide the necessary blue light, the necessary red light, the purple light that can be used to enhance hemoglobin and the necessary green light, so as to ensure the relative integrity of the necessary visible light band components in the white light and the ultraviolet light component that can enhance hemoglobin at the same time, and thus the high-quality white light can be realized. When the special light mode is needed, the green light source of the required band can be selected to be turned on, and the other green light source can be turned off or controlled to be turned on at low power, and part of other non-green light sources can be selectively turned on according to actual needs, so as to obtain the required special light. On this basis, the narrow-band light / wide-band light green light source can be flexibly selected and matched, and the required green narrow-band light can be obtained through filtering when the wide-band light is available, so that the requirement for the green light source component can be greatly reduced, and the special light acquisition with low cost can be realized.

[0153] From the above analysis, it can be known that the embodiment of the present application can realize the required white light mode and special light mode illumination by selectively turning on the required green light source, without the need for filter switching motor related structure, so that the related structure required for the special light can be greatly simplified, and the assembly difficulty is greatly reduced. Since the structure is effectively simplified, the optical machine module of the embodiment of the present application has lower failure rate and better stability, and the material cost can be effectively reduced.

[0154] Meanwhile, since the switching motor is not needed, but the turning on and turning off of different light sources are controlled to realize the switching of the illumination mode, different monochromatic light sources can be obtained for different special light observation modes, so that the time delay caused by the physical switching of the motor is avoided, that is, the switching time delay can be lower.

[0155] In addition, the embodiment of the present application can also be compatible with different green light sources, so that the selection of the green light source component in actual application is more flexible, that is, the cost of the green light source required for the special light can be reduced, so as to further reduce the material cost and the assembly difficulty.

[0156] In summary, the embodiment of the present application can provide a light source module and a light source device with simpler structure, lower switching time delay and lower assembly difficulty. As an optional embodiment of the present application, the light source module further includes:

[0157] The amber light source (ALED) is used to generate amber light. The second light combining component is specifically used for combining the first combined light, the second green light, the red light and the amber light to obtain the illumination light. The amber light source can be an independent light source or the same light source as the red light source.

[0158] In the embodiment of the present application, the amber light source can be an independent light source, in which case the light source module contains six light sources of five colors, i.e., a purple 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. Alternatively, the waveband of the light emitted by the original red light source can be extended so that it can emit light containing the waveband of the amber light, in which case the amber light source and the red light source are the same light source. Correspondingly, the light source module contains five light sources of five colors, i.e., a purple light source, a blue light source, a first green light source, a second green light source, and a red light source (i.e., the amber light source).

[0159] Compared with the foregoing embodiment, the advantage of adding the amber light source is that: the red light (R) has stronger penetration ability due to its longer wavelength, and the difference in absorbance of red light between hemoglobin (blood vessels) and surrounding tissues is small, and both of them hardly absorb red light. The wavelength of the amber light (A) is slightly shorter than that of the R light, which on the one hand still ensures a certain degree of deep penetration, and on the other hand, the difference in absorbance of the amber light between hemoglobin and surrounding tissues of blood vessels is large, and the absorbance of the amber light by hemoglobin is more obvious than that by the surrounding tissues of blood vessels, so that the light and dark contrast between the presence and absence of hemoglobin can be better highlighted. That is, by increasing the irradiation of long-wave light (amber light), the deep tissue information is strengthened. While presenting an image close to natural white light color tone, the subtle color difference of blood can be accurately emphasized.

[0160] As an optional embodiment of the present application, the amber light emitted by the amber light source, and the illumination light finally irradiated in the case where the amber light source is turned on, both cover part or all of the 600nm-610nm waveband of the amber light. By comprehensively considering the diameters of capillary blood vessels and thick blood vessels, the absorbance curves of oxygenated hemoglobin / reduced hemoglobin, and the concentration of hemoglobin in blood, etc., the wavelength center of the amber light is set near 600nm to maximize the difference in absorbance between capillary blood vessels and thick blood vessels, so that the 600nm-610nm waveband of the amber light in the embodiment of the present application can achieve better imaging of blood vessels.

[0161] As an optional embodiment of the present application, the first green light source is a fluorescence excitation light source, and the first green light is broadband light obtained based on blue light or purple light excitation. The first light combining component includes:

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

[0163] In the field of LED products, in order to obtain better broadband green light, generally blue or violet light LED is used to excite green fluorescence, so as to obtain green broadband light with wider spectrum and better quality. Based on this, it will also cause the broadband green light to carry blue or violet light, so that the blue or violet band light is mixed in the first green light, reducing the quality of the first green light. In order to solve this problem, a special filter is generally needed to filter out the blue or violet light, but this will increase the complexity of the structure of the light source module, which is not conducive to simplifying the design. On the other hand, considering that when synthesizing blue light and green light, the cutoff band of the dichroic mirror is generally set at the boundary between the blue light band and the green light band, so the dichroic mirror for synthesizing blue light and green light also has the function of cutting off the blue light in the green light. Based on this, the target dichroic mirror originally used to synthesize blue light and first green light is reused as a filter for blue light in the first green light in the embodiments of the present application, so that a special filter is no longer needed, and the cost required for additional filtering design is also reduced, which can effectively simplify the structure design and reduce the structure cost.

[0164] As an embodiment of the present application, it can be known from the above embodiment description that the first green light source and the second green light source can be freely configured as broadband light and narrowband light sources. Based on this, the following will be described in combination with embodiments for each configuration:

[0165] Case one, the first green light and the second green light are both broadband light;

[0166] In some embodiments, the first green light source and the second green light source emit green light which is broadband light, at this time the target light combining component is specifically used for:

[0167] In the process of transmitting or reflecting the first combined light, the light with a wavelength longer than the first threshold wavelength is filtered out, and in the process of transmitting or reflecting the second green light, the light with a wavelength 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.

[0168] In the embodiments of the present application, the first green light and the second green light are both broadband light, and the target light 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. In this way, effective segmentation of the green light band can be realized, and each green light source can provide one side of the green light band. The advantage of the embodiments of the present application is that:

[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] From the above analysis, the first green light is mainly used to provide a relatively short wavelength green light segment, and the second green light is used to provide a relatively long wavelength green light segment. Therefore, in order to ensure the quality of the final white light, all green light bands with a wavelength shorter than the first threshold are included in the selected first green light, and all green light bands with a wavelength longer than the first threshold are included in the selected second green light. Thus, after filtering via the first threshold, the complete green light band can still be obtained by mutual combination. On this basis, the selection of the green light source in the embodiments of the present application is basically unrestricted, that is, in actual application, the skilled person can flexibly select the two green light sources used according to actual needs, and is basically not affected by the quality difference of different batches of light sources. For example, in some embodiments, two green light sources covering the complete green light band can be selected, such as green light LEDs of the same batch or two green light LEDs of the same model, and in some alternative embodiments, two green light LEDs of different models can also be selected.

[0175] In summary, the embodiments of the present application have strong compatibility for green light sources. In the case of meeting the requirements of containing corresponding long and short wavelength bands respectively and finally being able to synthesize the complete green light band, any configuration and any light emission characteristic green light source can be selected, which can greatly reduce the requirements for green light sources, thereby improving the flexibility of selecting actual light source components and reducing costs.

[0176] Case two, the first green light and the second green light are both narrow-band light.

[0177] When the first green light and the second green light are both narrow-band light, there is partial overlap of green light bands between the first combined light and the second green light, and in the green light band in the second combined light, the light intensity in the full width at half maximum band range is greater than the corresponding light intensity at half width.

[0178] The advantage of narrow-band light is that it can directly provide the specific green light band required by special light without additional filtering, that is, it can be directly used for special light synthesis, which can simplify the optical path structure design. At the same time, since no filtering is required, the requirements for optical path design and production process can be reduced, and the overall cost can be reduced. Based on this, in the embodiments of the present application, both green lights are narrow-band light, which simplifies the optical path and reduces costs. As an embodiment of the present application, the first green light includes all or part of the 525nm-542nm band, and the second green light can include all or part of the 560nm-577nm band.

[0179] At the same time, there is partial overlap of green light bands between the first combined light and the second green light to ensure that the complete green light band can be covered when the two are combined.

[0180] On this basis, in order to ensure the availability of the light intensity in the green light band after light combination, so as to ensure the quality of the final white light, in the embodiments of the present application, in the green light band in the second combined light, the light intensity in the full width at half maximum range is greater than the corresponding light intensity at the half width. Specifically, the two narrow-band lights themselves have specific peaks, and when light is combined, the light intensity in the band between the two peaks is often weaker than the light intensity of the two peaks, so that a trough is easily formed between the two peaks after light combination, that is, there is a phenomenon of obvious light intensity depression (the middle light intensity decreases significantly and is weaker than both sides) near the central band of the combined light. At this time, if the light intensity of the band around the trough is too weak, it will lead to uneven composition of green light in the synthesized white light, and poor quality of the white light. Based on this, the embodiments of the present application select the light intensity distribution characteristics of the two green narrow-band lights, so that in the green light band in the synthesized second combined light, the light intensity in the full width at half maximum range is greater than the corresponding light intensity at the half width, and then the light intensity in the green light band in the combined light is relatively uniform and available, and the quality of the white light is improved.

[0181] Among them, the full width at half maximum is also called half peak full width (full width at half maxima, FWHM), half width, half peak width, half peak width, region width or region half width, etc., which refers to the peak width at half of the peak height, that is, a straight line parallel to the peak bottom is drawn through the midpoint of the peak height, and the distance between the two points of intersection on both sides of the peak. The half width refers to half of the peak height.

[0182] An example is used for illustration, which can be referred to as Figure 7 is a scene diagram provided by the embodiments of the present application when the two green lights are both narrow-band lights. In Figure 7 , the first green light and the second green light are both narrow-band lights, there is partial overlap of the green light bands of the first green light and the second green light, and in the light combination of the first green light and the second green light, the peak height light intensity is 12.5 units, and the corresponding half width is 6.25 units. Assuming that the two wavelengths corresponding to the half width are a and b, the corresponding full width at half maximum is the band in the interval a to b. It can be seen from Figure 8 that the light intensity corresponding to each wavelength in the band in the interval a to b is stronger than the half width: 6.25 units. Therefore, when the light combination is used in the white light mode, the quality of the green band light can be guaranteed, and then the quality of the white light is guaranteed.

[0183] Case three: the first green light is a wide-band light, and the second green light is a narrow-band 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 configured to: filter out light with a wavelength longer than a 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, the first threshold being any wavelength value in the green light band.

[0185] Case four: 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 configured to: transmit or reflect the first combined light, filter out light with a wavelength shorter than a 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 being any wavelength value in the green light band.

[0187] In cases three and four, the advantages of broadband light and narrowband light are combined. A single green light source is selected as a narrowband light source, and the other is selected as a broadband light source. For the broadband light source, the extraction of the complementary green light band is achieved by filtering, thereby ensuring the complete green light band required for white light synthesis, while different green light bands required for special light can also be obtained. The advantage is that the broadband light source can be more freely selected, thereby reducing the related cost (for specific analysis, refer to the description of case one above), and the narrowband light source can be selected more accurately according to the requirements, thereby reducing the complexity of the related structure while achieving the accurate narrowband light requirements.

[0188] In addition, for some scenes in actual applications that use one of the 525nm-542nm band or the 560nm-577nm band for special light synthesis, at this time, the embodiments of the present application can select narrowband light in the required band, and select broadband light with filtering for the other band with relatively reduced requirements, thereby achieving accurate generation of the green light band required for special light while reducing the cost of the other green light source, thereby achieving compatibility of special light performance and overall cost.

[0189] As an optional embodiment of the present application, based on the embodiments of cases three and four, the embodiments of the present application still satisfy that in the green light band in the second combined light, the light intensity in the full width at half maximum band range is greater than the light intensity at the half width. Thus, the embodiments of the present application can improve the usability of the overall green light band, thereby improving the quality of white light. For specific details, refer to the description of the related embodiments of case two.

[0190] As an optional embodiment of the present application, under the premise that the various embodiments described above can effectively obtain the green light waveband containing the absorption peak of hemoglobin, the embodiments of the present application can realize different special light modes through these special green light wavebands, so as to meet various actual clinical needs. Specifically, the embodiments of the present application collectively refer to the special light mode containing the absorption peak of the 525nm-542nm waveband as the first type of special light mode, and collectively refer to the special light mode containing the absorption peak of the 560nm-577nm waveband as the second type of special light mode. Each type of special light mode can contain one or more specific special light modules. Details are as follows:

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

[0192] 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.

[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] The embodiments of the present application mainly use the green light of the 525nm-542nm waveband to synthesize special light. Specifically, for the white light mode, the embodiments of the present application turn on the blue light source, the first green light source, the second green light source and the red light source to synthesize white light, and on this basis, other light sources can be selected to be turned on or not according to needs. For example, in some embodiments, in the white light mode, all light sources can also be turned on. Among them, for non-green light, each color of light source can provide monochromatic light of the corresponding color after being processed by the optical element. For green light, the green light emitted by the two green light sources can provide relatively complete waveband of green light after filtering (if they are all narrowband light, this operation can not be performed) and light combination. At the same time, since the embodiments of the present application introduce the purple light containing the absorption peak of the 415nm waveband, even in the white light mode, better imaging effect can be realized, which is conducive to the observation and image analysis of physiological tissues. In some embodiments, for the case that the light source module also has an amber light source, the amber light source will also be turned on at this time, so as to provide corresponding amber light into the white light, thereby further improving the quality of the white light for blood vessel imaging. In some optional embodiments, the light source module emits visible light waveband of 380nm-680nm of the illumination white light.

[0195] For the first type of special light, the first green light source is turned on to provide the required first green light, and other lights of different colors can be matched 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 sub-special light mode, the violet light source and the first green light source are both 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 sub-special light mode, the first green light source and the red light source are both turned on, and the light output of the violet light source, the blue light source, and the second green light source is less than the preset light output.

[0198] In the third sub-special light mode, the violet 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 sub-special light mode, the violet light source and the first green light source are turned on. The violet light has relatively weak penetration ability for physiological tissue, shallow penetration depth, and less scattering, is mainly absorbed by hemoglobin in the capillary vessels of the mucosa surface layer, and makes the superficial blood vessels appear dark brown or black, so that the fine structure of the mucosa surface layer and the superficial blood vessels can be clearly displayed. The green light in the 525nm-542nm waveband has relatively strong penetration ability, can reach the submucosa layer, display relatively thick blood vessels, and appear green or gray, forming a contrast with the surface layer blood vessels. At the same time, the violet light and the green light in the 525nm-542nm waveband both contain a hemoglobin absorption peak, so that the combined light of the two can achieve clear observation of the superficial and deep blood vessels, thereby achieving good imaging observation of the mucosa surface layer blood vessels. At the same time, the light output of the blue light source, the second green light source, and the red light source is weak or even 0 (i.e., controlled to be less than the preset light output), thereby reducing the light output influence of unnecessary light sources in the current special light mode as much as possible.

[0200] In the second sub-special light mode, the red light source and the first green light source are turned on. The red light source has relatively strong penetration ability for physiological tissue, so that when combined with the first green light, the combined light can achieve good imaging observation of deep thick blood vessels and bleeding points. At the same time, the light output of the violet light source, the blue light source, and the second green light source is weak or even 0 (i.e., controlled to be less than the preset light output), thereby reducing the light output influence of unnecessary light sources in the current special light mode as much as possible.

[0201] In the third sub-special light mode, the purple light source, the first green light source and the second green light source are lit, and the light output of the blue light source and the red light source is less than the preset light output, so as to reduce the light output influence of unnecessary light sources in these current special light modes as much as possible. Considering that in actual application, the scattering of short waves is more serious than that of long waves, which can easily lead to dark images and unclear long-distance views. Although the brightness can be improved by increasing the power of the light source, it may also bring other problems such as accelerated aging of the light source. Based on this, the second green light source is introduced in the first sub-special light mode. The advantages are that on the one hand, it can cover the three different absorption peaks of hemoglobin, so as to realize clear observation of the fine structure of the mucosal surface layer, the shallow layer and the middle-deep layer of blood vessels. On the other hand, the introduction of the second green light with relatively long wavelength can effectively improve the image brightness, thereby improving the long-distance imaging quality and making the long-distance view clearer.

[0202] In the above embodiments, the preset light output can be a preset fixed value, or a proportional value relative to other light sources, and the specific fixed value 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 the light output value of the lowest gear in the white light mode, such as assuming that the light output value of the lowest gear of a certain color light source in the white light mode is M, and the preset light output of the color light source can be any value (such as 0) less than or equal to M when the color light source is not needed in the current special light. In other embodiments, the preset light output can be 1 / n of the current green light output, where n is any value greater than or equal to 5, such as 1 / 5 or 1 / 10 of the current green light output.

[0203] As an optional embodiment of the present application, the light source module further comprises 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 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 separate light source or a red light source that emits an amber light band, i.e., the same light source as the red light source. For details, please refer to the above embodiments related to the amber light source, which will not be repeated here. The preset light output can refer to the above related embodiments, which will not be repeated here.

[0205] In the embodiments of the present application, for the case that the amber light source is arranged in the light source module, the embodiments of the present application can turn on the amber light source in the second sub-special light mode, and the second sub-special light mode has three wavebands of special light, which makes full use of the penetration depth difference of light of different wavelengths in the tissue (short-wave green light is easily absorbed by small blood vessels in the superficial tissue, amber light is easily absorbed by blood vessels in the deep tissue, and red light is not easily absorbed by hemoglobin). By optimizing the combination ratio of light of different wavebands, the contrast between blood vessels and surrounding tissue can be significantly improved, and the deep blood vessels are more prominent, thereby further improving the imaging observation effect of the deep blood vessels.

[0206] In other optional embodiments, the first type of special light mode can also include more or fewer other sub-special light modes, which are not described in detail here.

[0207] In other optional embodiments, the illumination mode of the light source module includes: a white light mode and a second type of special light mode. The second type of special light mode includes a plurality of sub-special light modes.

[0208] 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.

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

[0210] The embodiments of the present application mainly use green light of the 560nm-577nm waveband to synthesize special light. Specifically, for the white light mode, the embodiments of the present application turn on the blue light source, the first green light source, the second green light source, and the red light source to synthesize white light, and on this basis, other light sources can be selected to be turned on or not according to the requirements. For example, in some embodiments, all light sources can be turned on in the white light mode. Among them, for non-green light, each color of light source can provide monochromatic light of the corresponding color after being processed by the optical element. For green light, the green light emitted by the two green light sources can provide relatively complete waveband of green light after filtering (if they are all narrow-band light, this operation can not be performed) and light combination. At the same time, since the embodiments of the present application introduce the purple light containing the absorption peak of 415nm waveband, better imaging effect can be achieved even in the white light mode, which is conducive to the observation and image analysis of physiological tissue. In some embodiments, for the case that the amber light source is also arranged in the light source module, the amber light source will also be turned on at this time, thereby providing corresponding amber light into the white light, and further improving the quality of the white light for blood vessel imaging. In some optional embodiments, the light source module emits visible light waveband of 380nm-680nm of the illumination white light.

[0211] For the second type of special light, the second green light source is turned on to provide the required second green light, and other lights of different colors can be matched 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 sub-special light mode, the violet 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 sub-special light mode, the violet light source, the first green light source, and the second green light source are 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 turned on, wherein the violet light has relatively weak penetration ability for physiological tissue, shallow penetration depth, and less scattering, is mainly absorbed by hemoglobin in the capillary blood vessels of the mucosa surface layer, and makes the superficial blood vessels present dark brown or black, which can clearly display the fine structure of the mucosa surface layer. The green light in the 560nm-577nm waveband has relatively strong penetration ability, can reach the middle-deep layer of the submucosa, display relatively thick blood vessels, and present green or gray, which forms a level contrast with the surface blood vessels. At the same time, the violet light and the green light in the 525nm-542nm waveband both contain hemoglobin absorption peaks, so the combined light of the two can achieve clear observation of the superficial and middle-deep blood vessels, thereby achieving better imaging observation of the fine blood vessels of the mucosa surface layer and the middle-deep blood vessels. At the same time, the light output of the blue light source, the first green light source, and the red light source is weak or even 0 (i.e., controlled to be less than the preset light output), thereby reducing the light output influence of unnecessary light sources in the current special light mode as much as possible.

[0215] In the fifth sub-special light mode, the violet light source, the first green light source, and the second green light source are turned on, and the light output of the blue light source and the red light source is less than the preset light output, thereby reducing the light output influence of unnecessary light sources in the current special light mode as much as possible. Referring to the description of the third sub-special light mode in the above embodiments, the embodiments of the present application can cover three different absorption peaks of hemoglobin at the same time, thereby achieving clear observation of the fine structure of the mucosa surface layer, the superficial blood vessels, and the middle-deep blood vessels. On the other hand, the introduction of the second green light with a relatively long wavelength can effectively improve the image brightness, thereby improving the quality of the long-range imaging, so that the long-range can be seen more clearly.

[0216] In the above various embodiments, the preset light output can be a preset fixed value, or a proportional value relative to other light sources, and the specific fixed value or proportional value is not limited herein. For example, in some embodiments, the preset light output of each light source can be any value lower than the light output value of the lowest gear in the white light mode, such as assuming that the light output value of the lowest gear of a certain color light source in the white light mode is M, and the preset light output of the color light source can be any value (such as 0) less than or equal to M when the color light source is not needed in the current special light. In other embodiments, the preset light output can be 1 / n of the current green light output, where n is any value greater than or equal to 5, such as 1 / 5 or 1 / 10 of the current green light output.

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

[0218] 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.

[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 turned on, and the remaining 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 completely the same.

[0221] The embodiments of the present application are based on the combination of the above two embodiments, that is, in the embodiments of the present application, the light source module has the ability to provide the first type of special light mode containing the 525nm-542nm waveband, and the ability to provide the second type of special light mode containing the 560nm-577nm waveband. In actual application, medical personnel can choose according to actual needs. The advantage of the embodiments of the present application is that it has more abundant special light modes and can meet more clinical needs. In addition, through the structure of the above various embodiments, the effective extraction of two different green light wavebands can be supported at the same time, that is, the embodiments of the present application can realize the acquisition of two different green light absorption peak wavebands with a simpler structure, so as to provide more abundant special light functions with a simpler structure, lower switching delay, and lower assembly difficulty.

[0222] For each specific sub-special light case supported in each type of special light mode, the embodiments of the present application do not make too many limitations, for example, the foregoing first type of special light mode and second type of special light mode related embodiments can be referred to. In addition, since the third sub-special light mode and the fifth sub-special light mode are the same, in some embodiments, when the first type of special light mode and the second type of special light mode are simultaneously present, the third sub-special light mode and the fifth sub-special light mode can be selected to be simultaneously supported or only one of them is retained. For example, in some embodiments, the first sub-special light mode, the second sub-special light mode, the third sub-special light mode and the fourth sub-special light mode can be selected to be simultaneously supported.

[0223] As a specific embodiment of the present application, reference can be made to Figure 8 , which is a structural schematic diagram of a light source module provided by the embodiments of the present application. In the embodiments of the present application, the light source module comprises:

[0224] a violet light source (V LED) for generating violet light;

[0225] a blue light source (B LED) for generating blue light;

[0226] a first green light source (G1 LED) for generating first green light;

[0227] a second green light source (G2 LED) for generating second green light; wherein both green light sources are broadband light sources, and the first green light source is a fluorescent light source excited by blue light;

[0228] a red light source (R LED) for generating red light;

[0229] an amber light source (A LED) for generating amber light;

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

[0231] A collimating mirror is arranged in front of each light source for collimating the light emitted by the light source and then shooting into the dichroic mirror;

[0232] a coupling mirror group for coupling the combined light and then transmitting it to the endoscope.

[0233] The positions of various elements can be referred to Figure 8 , and the light transmission path and related parameters are as follows:

[0234] The red light is first collimated by the collimating mirror and then shot into the dichroic mirror 15, reflected by the dichroic mirror 15, combined with the amber light and then shot into the dichroic mirror 14, transmitted by the dichroic mirror 14 and combined into the final illumination light, at this time the red light is finally output in the wavelength band > 610 nm.

[0235] The amber light is first collimated by the collimating lens and then enters the dichroic mirror 15. After being transmitted by the dichroic mirror 15, the amber light is combined with the red light and then enters the dichroic mirror 14. After being transmitted by the dichroic mirror 14, the amber light is combined with the final illumination light. At this time, the final output wavelength band of the 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, the second green light is combined with the first combined light and then enters the dichroic mirror 14. After being reflected by the dichroic mirror 14, the second green light is combined with the final illumination light. At this time, the final output wavelength band of the second green light is 540nm-600nm.

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

[0238] The blue light is first collimated by the collimating lens and then enters the dichroic mirror 11. After being reflected by the dichroic mirror 11, the blue light is combined with the purple light and then enters the dichroic mirror 12. After being reflected by the dichroic mirror 12, the blue light is combined with the first green light and then enters the dichroic mirror 13. After being transmitted by the dichroic mirror 13, the blue light is combined with the second green light and then enters the dichroic mirror 14. After being reflected by the dichroic mirror 14, the blue light is combined with the final illumination light. At this time, the final output wavelength band of the blue light is 430nm-485nm.

[0239] The first green light is first collimated by the collimating lens and then enters the dichroic mirror 12. After being transmitted by the dichroic mirror 12, the first green light is combined with the purple light and the blue light and then enters the dichroic mirror 13. After being transmitted by the dichroic mirror 13, the first green light is combined with the second green light and then enters the dichroic mirror 14. After being reflected by the dichroic mirror 14, the first green light is combined with the final illumination light. At this time, the final output wavelength band of the first green light is 485nm-540nm.

[0240] The film layer parameters of the corresponding dichroic mirrors are as follows:

[0241] The dichroic mirror 15 reflects 380nm-610nm and transmits 610nm-670nm;

[0242] The dichroic mirror 14 reflects 380nm-600nm and transmits 600nm-670nm;

[0243] The dichroic mirror 13 reflects 540nm-670nm and transmits 380nm-540nm;

[0244] Dichroic mirror 12: reflect 380-485 nm, transmit 485-670 nm;

[0245] Dichroic mirror 11: reflect 430-670 nm, transmit 380-430 nm.

[0246] The cut-off wavelength band of the dichroic mirror 13 is 540 nm, so that the green light longer than 540 nm in the first green light can be removed well, and the green light shorter than 540 nm in the second green light can be removed, so that the two absorption peaks in the green light are separated. The cut-off wavelength band of the dichroic mirror 12 is 485 nm, so that the blue light can be reflected, and the blue light doped in the first green light for excitation can be filtered out.

[0247] In addition, the related principles, details and beneficial effects of the embodiments of the present application can be referred to the description of the above Figures 1 to 6 and other related embodiments, which will not be described here.

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

[0249] An endoscope system comprises an endoscope, an image processing device, a display device (display), and the light source device of the above embodiments.

[0250] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0251] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A light source module applied to a light source apparatus of an endoscope, characterized by, The application relates to a light source, comprising: a purple light source for generating purple light; a blue light source for generating blue light; a first green light source for generating first green light; a second green light source for generating second green light; a red light source for generating red light; 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 comprises a target light combining component; the target light combining component is used for transmitting one of the first combined light and the second green light, reflecting the other one, and combining the first combined light and the second green light to obtain second combined light; the second combined light covers a green light waveband range wider than that of the first green light and wider than that of the second green light, or the second combined light covers all green light wavebands; wherein, there is broadband light in the first green light and the second green light, and the target light combining component is further used for filtering part of the green light waveband of the broadband light in the first green light and the second green light when transmitting and / or reflecting light rays; 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, The first green light and the second green light are both broadband light, and the target light combining component is specifically used for: filtering light rays with a wavelength longer than a first threshold wavelength when transmitting or reflecting the first combined light, filtering light rays with a wavelength shorter than the first threshold wavelength when transmitting or reflecting the second green light, and combining the filtered first combined light and the filtered second green light to obtain the second combined light; wherein the first threshold is any wavelength value in the green light waveband.

3. The light source module according to claim 1, characterized by The first green light is broadband light, and the second green light is narrowband light, and the target light combining component is specifically used for: filtering light rays with a wavelength longer than a first threshold wavelength when transmitting or reflecting the first combined light, transmitting or reflecting the second green light, and combining the filtered first combined light and the second green light to obtain the second combined light, the first threshold being any wavelength value in the green light waveband; or The first green light is narrowband light, and the second green light is broadband light, and the target light combining component is specifically used for: transmitting or reflecting the first combined light, filtering light rays with a wavelength shorter than the first threshold wavelength when transmitting or reflecting the second green light, and combining the first combined light and the filtered second green light to obtain the second combined light, the first threshold being any wavelength value in the green light waveband.

4. The light source module according to claim 1, characterized by The first green light and the second green light are both narrowband light, there is partial green light waveband overlap between the first combined light and the second green light, and the light intensity in the full width at half maximum waveband range of the green light waveband in the second combined light is greater than the corresponding light intensity at the half width.

5. The light source module according to claim 1, 2 or 3, characterized in that 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: A target dichroic mirror is configured to filter out light with a wavelength shorter than that of green light from the first green light and combine the blue light and the filtered first green light.

6. The light source module according to claim 2, characterized by When the first green light and the second green light are both broadband light, the light source module 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 includes all green light bands with a wavelength shorter than the first threshold, and the second green light includes all green light bands with a wavelength longer than the first threshold.

7. The light source module according to claim 1, characterized by The light source module further includes: An amber light source configured to generate amber light; The second light combining component is specifically configured 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 a white light mode and a first type of special light mode; the first type of special light mode includes a plurality of sub-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 remaining 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, the violet light source and the first green light source are both turned on, and the blue light source, the second green light source, and the red light source have light output amounts less than a preset light output amount; In the second sub-special light mode, the first green light source and the red light source are both turned on, and the violet light source, the blue light source, and the second green light source have light output amounts less than a preset light output amount; In the third sub-special light mode, the violet light source, the first green light source, and the second green light source are all turned on, and the blue light source and the red light source have light output amounts less than a preset light output amount.

10. The light source module according to claim 9, characterized by The light source module further includes an amber light source configured 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 violet light source, the blue light source, and the second green light source have light output amounts less than a preset light output amount.

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 a white light mode and a second type of special light mode; the second type of special light mode includes a plurality of sub-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 remaining light sources are partially turned on.

12. The light source module according to claim 11, characterized by The second type of special light mode includes a fourth sub-special light mode and a fifth sub-special light mode; In the fourth sub-special light mode, the violet light source and the second green light source are both turned on, and the blue light source, the first green light source, and the red light source have light output amounts less than a preset light output amount; In the fifth sub-special light mode, the violet 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 a 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 mode of the light source module comprises a white light mode, a first special light mode and a second 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 special light mode, the first green light source is turned on, and the rest of the light sources are partially turned on. In the second special light mode, the second green light source is turned on, and the rest of the light sources are partially turned on; the light sources turned on in the first special light mode and the second special light mode are not completely the same.

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

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

16. A light source device, characterized by comprising: The light source device comprises the light source module according to any one of claims 1 to 15.

17. An endoscope system characterized by comprising: Comprise: An endoscope, a display device and the light source device according to claim 16.

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